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Garage => Mechanicals => Topic started by: Jjutzy on 18 November 2018, 12:35 PM

Title: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 18 November 2018, 12:35 PM
This is my first post here on the forum. I live in Gilbert, Arizona and have a new to me 1979 300 SD with about 350,000 miles. I’m starting to like this car a lot.

Anyway, on to the issue at hand. Long story short, shortly after I purchased the vehicle, I lost a Flex Disc while driving on the highway. Drive shaft flopped around, destroyed the shift linkage and bent the arm in the gear selector, which also obliterated the bushings. I replaced the bottom unit with a used one with good bushings and a straight arm. Sourced a linkage from a junk yard and replaced the linkage bushings. The vehicle now shifts, but for the life of me, I cannot get the gear selector to work properly. Park will not fully engage and I cannot get the selector all the way into Low. When I shift to Low, there is still about 1/2” to the bottom of the track. When I shift to P, the transmission disengages, but does not lock, basically goes into a neutral state. Is it possible that the linkage is not correct for my transmission? I have adjusted the linkage in all directions and just cannot get it right. Any tips or advice would be appreciated. I need to get the vehicle registered, but can’t take it in to get sniffed until I can place the vehicle in Park and not have it roll away on the technicians!

Thanks, look forward to participating here on the forum!
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Squiggle Dog on 18 November 2018, 06:14 PM
It's nice to see another 300SD owner in Arizona! It sounds like the shift linkage is not long enough. But, it could also be that it's placed in the wrong hole on the transmission. It should go into the forwardmost hole (where the bushing is in the pic).
(https://lh3.googleusercontent.com/eOU0a8HK0Z_NKvge1_ObKvMQfB8TaCMNpWOmLJlXFRUQ9cB48ZiHwJtOjjjw9aGJIDo0UIyxowYK4ujD9KUEpqndu1XBPIlFWsAah5KXwqsf3l9nyu5D_Jd7uskGJjNCPSCpBayxWylVELyU6W_ky4nbdFVuEY_23Fi_tX5Yh_M33R5K4MWA9ON9V_qaI3OQWxEBXq1pZmWaUHMIewgDZ3KniN_s8u9s3fCm6pciUizGeaWc4vr4iomdC7-hPN-E8XEDs4KQDIMMcas9CiyvQHtdZgEE4WE2OM2bM7VAMU8_2w13d227QABgSSuJf5v4DSiltgcnaBU_m2QrZM8974tsb7kgqv4vu2ISDd29I_chsP6M8Epjb-t_xEMeIJm4C0g3BARB_ofKvd0VRXNBXDgvtYhaaKc6KTpnPb4ExTUyxLnOvOtYCas8TSmxJuO5E2tnP2xuWSqex4CbiY4TtjjCJ9HOfvgoDArtAewKpo7RvjTKXPpfEaB37QtYxvf1cUhom_zk-9MVb30EiYEo9BKg-E2Q9ei6iYEeRv4_XPdLq0SFu_YFIrHp-3JQlBXwDi9Npodtao6sJIH57EiPr42jt2wb5fOrsuha7ftCxigVhE-6vgQoU7R08EEPy7YAhBvv-FOfcrZG7pqDl2HFuuaK=w800-h600-no)

Did that shift linkage happen to come from the 450SEL in the Phoenix Pull-N-Save North wrecking yard? If so, it's possible it's not the right length because it uses a different part number (116 260 07 33) instead of part number 116 260 43 33 that you need. I'd offer the one from the 280SE I'm parting out, but it's a different part number yet (116 260 06 33).

There's also a chance that your parking pawl in the transmission is broken or disengaged, but the shift linkage is obviously a problem and most likely the sole cause of it.
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: daantjie on 18 November 2018, 07:31 PM
Welcome!  Phew you dodged a big bullet with that flex disk could have been a lot worse :o
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Diesel 617 on 18 November 2018, 07:34 PM
Welcome!

After blocking the wheels so the car wont roll. Climb under the car and manually engage the transmission into park by pushing the selector (in the photo above) all the way towards the engine. Remove the blocks and see if the car rolls. Can you drive the car in any of the other gears? This will eliminate and transmission woes.
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 20 November 2018, 03:43 AM
Thanks for all of the replies.

Here’s where I’m at. I have identified the fact that’s i have the wrong linkage. The linkage I scavenged was from a pick n pull. I don’t recall what the model was that I got the part from, but it is definitely not the correct linkage. It is a one piece linkage and the 300 SD uses a two piece linkage. So, I’ve got a linkage on the way now from Pelican Parts. I’ll post some pics of the carnage and the parts and repairs when I get it all back up and running.

I incorrectly assumed that because the vehicle I pulled parts from was from the same era and had a Diesel engine, that it must have shared the same parts. Another lesson learned.

Now I just need to get it put back together so I can go find out if it’s going to pass the smog test!
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 22 November 2018, 01:38 PM
So...
Pelican sent an email, a week after I placed my order, informing me they do not have my parts and have canceled my order.

Need to source a linkage. Any leads as to where to get my hand on one?

Here’s the linkage, post incident.

Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Alec300SD on 22 November 2018, 02:17 PM
I just pulled  the upper oil pan from a 1980 300SD at the Oakland PNP on Veterans Day.

Row 52 shows it still being in the yard.
I'll check it out tomorrow and pull the shift rod for you if it is still present.

Any other bits you might need?
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: daantjie on 22 November 2018, 03:00 PM
In my experience these parts are by now all NLA new from Benz, of course you get lucky here and there.  You can try the MB Classic Centre in Irvine CA, they are great to deal with.  Other than that as said you need to source a used one from a wreck at the scrapyard or from members here with part stashes.  Also check ebay, sometimes you get super lucky on there.
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 22 November 2018, 06:46 PM
I just pulled  the upper oil pan from a 1980 300SD at the Oakland PNP on Veternas Day.

Row 52 shows it still being in the yard.
I'll check it out tomorrow and pull the shift rod for you if it is still present.

Any other bits you might need?



If it’s there, I’ll be forever indebted to you. The local yard with all the old Mercedes is not open any more. The owner died and his wife opens it every once in a while, but I’ve never seen it open. I’m tempted to jump the fence at this point!

At this time, I do not need any other parts. The linkage is all I need to get up and running.
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Squiggle Dog on 22 November 2018, 10:37 PM

If it’s there, I’ll be forever indebted to you. The local yard with all the old Mercedes is not open any more. The owner died and his wife opens it every once in a while, but I’ve never seen it open. I’m tempted to jump the fence at this point!

If you're talking about the one I'm thinking of, I heard that recently all the cars and parts were packed up in shipping containers and sent off to The Middle East. Their prices seemed high, anyway. I really miss all the yards that used to be on Broadway. Ecology was great and always had lots of old Mercedes (that they didn't know they had).
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 22 November 2018, 11:13 PM
Squiggle, I’m talking about Tri-Star on Broadway. I was there two weeks ago. Yard is full. Gates are locked. Talked to the guys down the street and they told me that the old man that ran the place passed away and his wife had control of the business. They say that they open at random, but he hadn’t seen anyone there in months. I don’t know where else to find parts for my car. May end up having to have a machine shop make the linkage for me. Trying to avoid that hassle...
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Squiggle Dog on 22 November 2018, 11:33 PM
Squiggle, I’m talking about Tri-Star on Broadway. I was there two weeks ago. Yard is full. Gates are locked. Talked to the guys down the street and they told me that the old man that ran the place passed away and his wife had control of the business. They say that they open at random, but he hadn’t seen anyone there in months. I don’t know where else to find parts for my car. May end up having to have a machine shop make the linkage for me. Trying to avoid that hassle...

Oh, okay. I think they used to be known as Riteway Auto Parts. I remember I called about a steering wheel and they said they wanted $300 for it. Crazy. I was in the area, so I asked to see the steering wheel, and it was rough in person. They also increased the price to $600. I passed.

The yard I was thinking of was All Mercedes Wrecking Yard. Every time I went there, it seemed like it was closed, except for one time there was an old lady who acted like we were trespassing, but she let us in. Their prices seemed really high. I think this is the place that sold everything and shipped it to The Middle East.

I'd offer you a linkage if I had a spare, but I don't think I saved it from the 1979 300SD parts car I had years ago. I removed the transmission from the car (and it's currently in my daily driver 1980 300SD) but I really don't think the linkage got saved. But, I'll keep an eye out for it. I also browse eBay frequently and in fact, there is a guy parting out a 1979 300SD... maybe he has one if you ask: https://www.ebay.com/sch/m.html?_odkw=&fits=Model%3A300SD%7CMake%3AMercedes-Benz&_ssn=roverrecyclers&hash=item2abc50887e%3Ag%3Ao-4AAOSwYi5b9dDt%3Ark%3A1%3Apf%3A0&item=183548020862&_osacat=0&_from=R40&_trksid=p2046732.m570.l1313.TR10.TRC2.A0.H0.Xmercedes+300sd.TRS2&_nkw=mercedes+300sd&_sacat=0 (https://www.ebay.com/sch/m.html?_odkw=&fits=Model%3A300SD%7CMake%3AMercedes-Benz&_ssn=roverrecyclers&hash=item2abc50887e%3Ag%3Ao-4AAOSwYi5b9dDt%3Ark%3A1%3Apf%3A0&item=183548020862&_osacat=0&_from=R40&_trksid=p2046732.m570.l1313.TR10.TRC2.A0.H0.Xmercedes+300sd.TRS2&_nkw=mercedes+300sd&_sacat=0)
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Alec300SD on 23 November 2018, 01:36 PM
Jjutzy - Success, shift rod harvested with both retaining clips.

I took it apart and found it fits into the small flat rate USPS shipping box.

PM sent.
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 23 November 2018, 03:48 PM
Thank you Alec. It’ll be nice to get the Mercedes back on the road. P.m. sent
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 26 November 2018, 12:50 PM
Update:

So, Inhave installed the correct shift linkage. I am able to shift into all gears now.

I am unable to engage the transmission brake. It shifts out of R, but the transmission brake does not activate. The only part I have not changed is the gear selector lever on the transmission. Could this be my culprit?

Worried that I may have damaged the transmission when the flex disc failed. All other gears work great.
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Squiggle Dog on 26 November 2018, 01:02 PM
Good and bad news, I see. Try this; with the shift rod disconnected at the transmission side, move the lever on the transmission to the park position (all the way toward the rear of the car, I think). If you don't hear and feel the parking pawl engage and the car is still able to roll, then the parking pawl likely got damaged.

I think you can repair or replace the parking pawl by removing the yoke and then the rear section of the transmission. I don't think you necessarily have to have the transmission removed in order to do this, but everything needs to be kept surgically clean when going back together.
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 03 December 2018, 02:14 AM
It’s been a while. I’ve been working some long hours and extra shifts ramping up for Christmas.

Anyway, just got out from under the car. I’ve got everything besides Park. Definitely thinking that I’m going to have to repair the Pawl. Is this a part I should be able to source new? I have had no luck finding the part number nor looking it up as a parking pawl. Would anyone happen to know the part number? I’d really like to have the replacement part on hand before I rip into that tail cone. As it is, I’m going to see if I can rig up the parking brake so I can at least get it in to get smogged and licensed. In the meantime, if I could get the parts on order to repair the Pawl, I’d be happy. I may have a line on an entire transmission, but prefer not to do that if I can just replace the broken part...

Thanks,
John
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Alec300SD on 03 December 2018, 07:32 AM
Parking Pawl 1979 300SD:  1152780221

Free shipping with promo code: "BENZWORLD 2017"
at https://www.mboemparts.com/oem-parts/mercedes-benz-pawl-1152780221
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: daantjie on 03 December 2018, 07:42 AM
Some advice which help me a lot when I had a similar issue with the 6.9...Make double sure ALL your bushings on the shifter mechanism is in perfect shape.  From memory there is a nylon bushing where the shifter "down rod" (sorry not sure of the tech term) connects to the actuating rod.  Then also, pull the whole shifter mechanism, and you will see there are 2 large plastic bushings (probably well worn or gone) on the lateral section, plus also there are 2 tiny plastic bushings which orientate the spring mechanism on the shaft.  These bushings are super cheap and easy to replace.
This might not be the issue, but they are easy to replace and make a huge difference in the feel of the shifter as well as ensure you engage the notches in the gate properly, with no flapping of the handle.
But yes, if your pawl is buggered, then this is a fairly large job.  On the 6.9 at least the pawl is reenforced to my knowledge, I am guessing due to increased weight of that monster v8 ;)
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 03 December 2018, 08:47 AM
Can I drop the nose cone without dropping the entire transmission?

Also, after reading up a bit on this, it may not be as simple as just replacing the Pawl? Chances are, it may still be good, but the plastic arm that moves it into and out of position may be what broke? Any input from any of you who have been through this before?

Thanks,
John
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Squiggle Dog on 03 December 2018, 10:46 AM
This might help: https://cardiagn.com/atsg-mercedes-722-1-722-2-transaxle-service-manual-pdf/ (https://cardiagn.com/atsg-mercedes-722-1-722-2-transaxle-service-manual-pdf/) . Also, it may not be possible to tell what or how many parts are affected without taking off the rear section of the transmission, but it should be able to be done while installed in the vehicle.
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: UTn_boy on 04 December 2018, 07:03 PM
Can I drop the nose cone without dropping the entire transmission?

Also, after reading up a bit on this, it may not be as simple as just replacing the Pawl? Chances are, it may still be good, but the plastic arm that moves it into and out of position may be what broke? Any input from any of you who have been through this before?

Thanks,
John

John, there are no plastic linkages that move the parking pawl into or out of the actual parking gear.  It's all metal linkage.  In the picture below, take note of the parts highlighted in a blue square.  Number 460 is the actual metal linkage, number 457 is your parking pawl, and number 452 is the parking gear.  The parking gear is coupled to the output shaft via splines.  It's not unheard of for a parking pawl or parking gear to sheer and become damaged, but it's highly unlikely, especially since these transmissions have a hydraulic interlock to disallow engagement of park at speeds above 10-12 miles per hour. 

If either the parking pawl or parking gear are, in fact, damaged, then as Daniel and Scott have mentioned the repair can be done with the transmission still attached to the engine.  However......you will need a special socket to remove the slotted nut that holds the yoke on to the output shaft, (After you disconnect the driveshaft) ,and you'll also need a special tool to remove the screw that holds the secondary oil pump in (item number 599 in the picture).  A self made tool can be made for the secondary pump screw, but if the original slotted nut is still on the yoke of the output shaft you'll have to either buy the special socket or say a few Hail Mary's and hope it'll come loose with a hammer and a chisel.  If the hammer and chisel are used for removal, then you'll have to buy a new nut, which is thankfully now a nut that takes a regular deep well socket for tightening and removal.

In more unusual circumstances, broken/torn motor mounts and a torn transmission mount can also cause your problem.  When the mounts break, the whole drive train can shift forward, backward or sideways, and will throw the geometry off so much that shift linkages will not fully engage in any of the gears.....most notably Park.  Though, if the car is still starting in Park or Neutral, then the aforementioned is negated. 

Also, when an event occurs, such as a flex disc letting loose, the driveshaft can also break the rear housing on the transmission.  This housing is designed to break in the event of an impact.  Many rear housings have been damaged/broken due to the driveshaft coming loose from the flex disc.  Consequently, if the rear housing is broken this can also alter the geometry of the shift linkages.  If a replacement exhaust has been fitted incorrectly, the exhaust can pull back on or push forward on the drive train when one of the mounts comes loose or breaks....again altering the linkage geometry. 

Since you've already replaced the shift gate housing and the actual shift linkage, then we can rule those out.  This leaves motor mounts, transmission mount, rear housing, and even the bracket that the sift linkage attaches to as suspect items of interest.  And don't forget that the actual transmission tunnel (where the shift gate housing screws to) can also become distorted causing a misalignment in the linkages.  Obviously, the distortion can come from the driveshaft striking the transmission tunnel sheet metal.  You'll literally have to look at everything to determine what's causing the misalignment.  Even things that you wouldn't think to check.  :) 

Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 05 December 2018, 01:34 AM
Can I drop the nose cone without dropping the entire transmission?

Also, after reading up a bit on this, it may not be as simple as just replacing the Pawl? Chances are, it may still be good, but the plastic arm that moves it into and out of position may be what broke? Any input from any of you who have been through this before?

Thanks,
John

John, there are no plastic linkages that move the parking pawl into or out of the actual parking gear.  It's all metal linkage.  In the picture below, take note of the parts highlighted in a blue square.  Number 460 is the actual metal linkage, number 457 is your parking pawl, and number 452 is the parking gear.  The parking gear is coupled to the output shaft via splines.  It's not unheard of for a parking pawl or parking gear to sheer and become damaged, but it's highly unlikely, especially since these transmissions have a hydraulic interlock to disallow engagement of park at speeds above 10-12 miles per hour. 

If either the parking pawl or parking gear are, in fact, damaged, then as Daniel and Scott have mentioned the repair can be done with the transmission still attached to the engine.  However......you will need a special socket to remove the slotted nut that holds the yoke on to the output shaft, (After you disconnect the driveshaft) ,and you'll also need a special tool to remove the screw that holds the secondary oil pump in (item number 599 in the picture).  A self made tool can be made for the secondary pump screw, but if the original slotted nut is still on the yoke of the output shaft you'll have to either buy the special socket or say a few Hail Mary's and hope it'll come loose with a hammer and a chisel.  If the hammer and chisel are used for removal, then you'll have to buy a new nut, which is thankfully now a nut that takes a regular deep well socket for tightening and removal.

In more unusual circumstances, broken/torn motor mounts and a torn transmission mount can also cause your problem.  When the mounts break, the whole drive train can shift forward, backward or sideways, and will throw the geometry off so much that shift linkages will not fully engage in any of the gears.....most notably Park.  Though, if the car is still starting in Park or Neutral, then the aforementioned is negated. 

Also, when an event occurs, such as a flex disc letting loose, the driveshaft can also break the rear housing on the transmission.  This housing is designed to break in the event of an impact.  Many rear housings have been damaged/broken due to the driveshaft coming loose from the flex disc.  Consequently, if the rear housing is broken this can also alter the geometry of the shift linkages.  If a replacement exhaust has been fitted incorrectly, the exhaust can pull back on or push forward on the drive train when one of the mounts comes loose or breaks....again altering the linkage geometry. 

Since you've already replaced the shift gate housing and the actual shift linkage, then we can rule those out.  This leaves motor mounts, transmission mount, rear housing, and even the bracket that the sift linkage attaches to as suspect items of interest.  And don't forget that the actual transmission tunnel (where the shift gate housing screws to) can also become distorted causing a misalignment in the linkages.  Obviously, the distortion can come from the driveshaft striking the transmission tunnel sheet metal.  You'll literally have to look at everything to determine what's causing the misalignment.  Even things that you wouldn't think to check.  :)

Thank you for this excellent input.

So, I can shift into all gears. I replaced the flex disc and I drove the car around the block, testing all gears, including reverse. Transmission seems fine, other than the fact that Park will not engage. I have crawled under the vehicle, removed the linkage, and shifted the transmission, manually, into Park. The Pawl is definitely not engaging.

Question: Could a misalignment keep me from being able to engage park at the side of the transmission? One of the tabs is broken on the back of the of the lever that attaches the linakage to the transmission (there are two tabs on this piece). I’m assuming that that piece only serves to engage/disengage the neutral safety switch, and would not have anything to do with the parking pawl?

I’m assuming I can buy the tools from mercedessource.com or one of the other parts houses.

My gut tells me that this is a parking pawl. My gut has often been wrong in my years as a shade tree mechanic... 🤦‍♂️
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: UTn_boy on 05 December 2018, 02:53 AM
Well, if you detached the linkage, and pulled the shift lever bracket all the way to the rear while spinning the output shaft yoke and it didn't stop, then your assumption of something being broken is probably correct.  It won't be clear as to what is broken until the rear housing is removed for inspection. 

The process is rather simple.  Disconnect driveshaft, disconnect speedometer cable, remove slotted nut and output shaft yoke, remove secondary pump holding screw (along with spring and piston), remove transmission mount and cross member, and then remove the 8x1.25 bolts that hold the rear housing on.  The housing may need some persuasion, as the gasket and alignment pins may hold tight.  After the rear housing is removed you'll be able to see what is broken....the pawl or the gear.....maybe both.  Sometimes the pin that the pawl pivots on will want to come out when the rear housing is removed.  If so, then be aware of this happening so parts don't go flying into oblivion.....or in the transmission itself. 

The pawl simply slides off off a pivot pin, and there will be a spring keeping tension on it you'l have to take off along with the pawl.  If the gear has to be removed, then remove the speedometer drive gear and governor off of the output shaft, and then the gear.  Take note of the order in which everything goes, and be very careful with the metal rings that the governor slides over.  They're much like piston rings, and will break easily. 

Should you need a parking pawl or a parking gear, the gear (part number 722-272-00-17) will have to be sourced used, as it's no longer available, and the pawl itself (part number 115-278-02-21) can still be bought new from Mercedes for around $50-$60. 
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 05 December 2018, 07:56 AM
Does anyone know if the collar nut on the yoke is the same size as the pre-chamber collar nut?

Will this tool do the trick?

https://mercedessource.com/store/615-616-617-early-601-and-603-diesel-prechamber-collar-nut-torquing-tool
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: UTn_boy on 05 December 2018, 04:48 PM
Does anyone know if the collar nut on the yoke is the same size as the pre-chamber collar nut?

Will this tool do the trick?

https://mercedessource.com/store/615-616-617-early-601-and-603-diesel-prechamber-collar-nut-torquing-tool

No, and even if it was the same diameter the tabs are still of a different width, bevel, and depth.  Below is a picture of the nut and the socket that is used. 

Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 22 January 2019, 12:14 AM
Sorry for the long break between posts, but I finally got some time to crawl under the car. We’ve had an abnormally long cold snap here in Phoenix and between life and the cold, the project got put on hold.

Anyway, today I was able to remove the crown nut from the output shaft. I was able to move the nose cone a bit, but I think I’m not going to be able to completely remove the nose cone until I remove the secondary pump screw, piston and spring.

Two questions,

1. Is the screw driver in the attached photo positioned on the secondary pump screw?

2. If so, how in tarnation do you break that screw loose?

I was able to see some sort of broken plastic piece in the nose cone. Can’t wait to get in there to see what happened and I’m frustrated and giving up for the night because I do not know how I’m going to spin that enormous cap.

I’ll post pics and updates as I go, but I leave in a few hours for a 10 day business trip. Was hoping to get my parts ordered so they’d be here when I get back... Not going to happen...
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 09 March 2019, 03:48 PM
OK. Nose cone is off. There IS a plastic piece and it is broken. Is this part #460 in the diagram above? Is this a dealer part or a junkyard part?

Thanks.
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: daantjie on 10 March 2019, 10:53 PM
Answers to your questions in previous post:
1) Yes this is the closing plug for the secondary pump
2) You either need the special Benz tool, or a "dsuz" socket.  Or you can fashion a tool of course with a piece of flat bar.  Need to get a good bite on that plug or you will strip it.
In the EPC that plastic part looks to be a "release lever" of sorts.  Might have something to do with releasing the parking pawl, not sure.

Here is a good post from another forum, and I think not from exactly the same box, but it has good pics of similar parts like the secondary pump:

http://www.peachparts.com/shopforum/diesel-discussion/304903-722-118-automatic-transmission-rebuild-monster-diy.html

Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 11 March 2019, 07:44 PM
Is anyone here able to give me an idea as to what to call the part? I’m assume no it is the linkage #460 day n the diagram a couple of posts ago. I found another part diagram where is was listed simply as a “Linrage”. Just wondering if this is something I can buy new or if this is going to require some sleuth work. I considered trying to JB Weld it all back together, but if it fails... I fon’t Want to have to repeat this job!

TIA
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: daantjie on 11 March 2019, 08:46 PM
If you're sure of the part number, just contact the MB Classic Centre in Irvine CA.  If the part is not NLA you can have it delivered to your doorstep with FedEx within days.  JB Weld is a no bueno idea IMHO.
Title: Re: Intro & Shifter linkage Gear selector Issue 79 300SD
Post by: Jjutzy on 14 May 2019, 03:36 PM
I was able to source a new part, but am uncertain as to whether or not it is the correct part (Metallic part in the pictures is the replacement for the plastic part, also in the pictures).

When separating the nosecone from the transmission, the parking pawl spring came with it. For the life of me, I cannot figure out how the parking pawl spring goes on.

Questions

1. Can anyone tell me if the metal linkage is the correct replacement part for the plastic linkage in my transmission?

2. Does anyone have a picture or schematic, or could you explain to me how to install the spring on the parking pawl?

3. Once the pawl and spring are mounted, should I be able to move the linkage and see the pawl engage with the tail section still removed?


Thank you for your guidance.

https://flic.kr/p/2evwdUF
https://flic.kr/p/S8VZuZ
https://flic.kr/p/TLc98h
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