300SD Transmission Dead... - Page 2 - PeachParts Mercedes-Benz Forum

JamesDean · #16 08-18-2009, 04:13 PM

Quote:

Originally Posted by rcounts

Would the tranny from an 85 SD work? I have one I'd love to sell - CHEAP. Though the shipping might be a bit of dough...

Hm...I'll keep you in mind..any numbers to associate with CHEAP?

We've almost got the B2 out..

Does the fact that the cap was near impossible to compress mean anything?

rrgrassi · #17 08-18-2009, 05:53 PM

Quote:

Originally Posted by Hit Man X

The factory 722.3 PDF is readily available online, just go thru it yourself. It's a real simple trans.

You can make most of the special tools or just get a trans shop to break down the main drums. Not a big deal.

Do you have a link for that PDF file?

Thanks!

JamesDean · #18 08-18-2009, 09:19 PM

Alright the B2 is out...

Pics:

http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_9204.jpg
http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_9205.jpg
http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_9206.jpg
http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_9207.jpg
http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_9208.jpg
http://i98.photobucket.com/albums/l250/MafiaNicky/IMG_9209.jpg

pawoSD · #19 08-18-2009, 10:31 PM

Hmm...it does appear to have failed.

Have you drained the pan/pulled the pan to look for any debris? In mine when it failed I found this:

A piece of a spring for the rear clutch pack.....

JamesDean · #20 08-18-2009, 10:39 PM

I drained the pan..but I havent removed it yet.

I ordered a trans filter kit and new B2 w/ white plastic ring thing..

Hm..you dont think it failed? Its in half though...?

pawoSD · #21 08-19-2009, 02:09 AM

Quote:

Originally Posted by JamesDean

I drained the pan..but I havent removed it yet.

I ordered a trans filter kit and new B2 w/ white plastic ring thing..

Hm..you dont think it failed? Its in half though...?

I think I was delirious or something when I looked at your pic, it is obviously broken. My mistake.

I'd try replacing it and see what happens, I bet it will restore trans function.

When mine failed, reverse was mostly gone (only slight engagement) and 4th gear was questionable...it would "engage" but if I slowed down to 25mph or so and then gave it throttle, it would rev freely. I'd have to force it back to third then let it shift to 4th again. 1st/2nd/3rd still worked fairly well....but they were ingesting the circulating powdered clutch material, which was probably not helping things.

Graplr · #22 08-19-2009, 10:02 AM

Quote:

Originally Posted by pawoSD

Indeed it would. Even a 300D trans will work, with a bit of extra changes.

I put an '85 300D trans into my SD a few weeks ago....works great! Rear housing swap is required for the electronic speedometer....otherwise its a direct swap.

Did you get the tach to work? My tach no longer works when I put an 83 tranny into my 84 since the 84 gets the sensor from the flywheel but 83 and before get theirs from the front of the engine. If it works no mods perhaps it was because you put a newer trans in an older car?

pawoSD · #23 08-19-2009, 01:54 PM

Quote:

Originally Posted by Graplr

Did you get the tach to work? My tach no longer works when I put an 83 tranny into my 84 since the 84 gets the sensor from the flywheel but 83 and before get theirs from the front of the engine. If it works no mods perhaps it was because you put a newer trans in an older car?

Yes my tach still works since it is the old system, it reads off the front crank balancer on the motor and feeds through the tach amp on the fender.

chalupien · #24 08-19-2009, 08:52 PM

Im deciding on wether to purchase an 87SDL, with the fact that I will be removing the transmission in order to re-seal it...

Would you guys be able to tell me if this would require any special tools, or maybe even an estimate on how hard or any issues I may encounter.

The auto transmission would loose fluid quickly 5 quarts in 45 min that it would not be able to change gears. And the issue sounds like if it's resealed, itll be a charm...

Also are these transmissions know for massive failure?? I would guess not..

Thank you. And hopefully Ill buy this car and have more questions :-)

pawoSD · #25 08-19-2009, 08:59 PM

Quote:

Originally Posted by chalupien

Im deciding on wether to purchase an 87SDL, with the fact that I will be removing the transmission in order to re-seal it...

Would you guys be able to tell me if this would require any special tools, or maybe even an estimate on how hard or any issues I may encounter.

The auto transmission would loose fluid quickly 5 quarts in 45 min that it would not be able to change gears. And the issue sounds like if it's resealed, itll be a charm...

Also are these transmissions know for massive failure?? I would guess not..

Thank you. And hopefully Ill buy this car and have more questions :-)

Its not an "easy" project by any means to remove a transmission. When mine failed, I opted to pull it out attached to the engine rather than trying to get it out underneath. If you have lots of tools and a lift, I'd say do it underneath. If you've never done any major car repairs, then it is not a DIY job at all. I consider myself pretty skilled/experienced with these cars, and it took me about 25-30 hours of work to do my full swap.

The massive failure part depends on the mileage. Anything around or above 250k is borrowed time if it has not been rebuilt before. Getting it only re-sealed with real high miles would be a poor decision. Especially after it has apparently been run out of fluid more than once, that is not healthy for its insides at all!

My trans on my car had "massive failure" (see my picture of the debris I found) at 281k....it was working perfect prior to that one fateful drive.

A full rebuilt trans for an SDL is about $1500-2000.

Hit Man X · #26 08-19-2009, 09:00 PM

Quote:

Originally Posted by rrgrassi

Do you have a link for that PDF file?

Thanks!

PM/email me

kmaysob · #27 08-19-2009, 09:00 PM

yes that has indeed failed. makes sure to replace the cover seal while in there. and make sure you get the rod lined up with the brake band or it will not work.

Hit Man X · #28 08-19-2009, 09:02 PM

Quote:

Originally Posted by chalupien

Im deciding on wether to purchase an 87SDL, with the fact that I will be removing the transmission in order to re-seal it...

Would you guys be able to tell me if this would require any special tools, or maybe even an estimate on how hard or any issues I may encounter.

The auto transmission would loose fluid quickly 5 quarts in 45 min that it would not be able to change gears. And the issue sounds like if it's resealed, itll be a charm...

Also are these transmissions know for massive failure?? I would guess not..

Thank you. And hopefully Ill buy this car and have more questions :-)

If you are going through that much hassle, I would at the VERY LEAST replace the reverse clutches and inspect the two forward clutches for 3rd and 4th gears... bands just do not seem to really wear enough to concern me.

chalupien · #29 08-19-2009, 09:07 PM

Haha ya I understand the "hassles" of removing a transmission and/or the engine.

So, as for when I have the transmission out. What should I be inspecting and replacing.

Also what repair manual would you recommend?

kmaysob · #30 08-19-2009, 09:13 PM

Quote:

Originally Posted by chalupien

Haha ya I understand the "hassles" of removing a transmission and/or the engine.

So, as for when I have the transmission out. What should I be inspecting and replacing.

Also what repair manual would you recommend?

inspect all of the friction disks in the clutch packs,inspect the brake bands,and bearings, replace all seals,and clean the valve bodies.

get the fsm. stay away from haynes and chiltons.