Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11-12-2012, 10:27 AM
Registered User
 
Join Date: Oct 2006
Posts: 16
92 300D Tranny Failure

It's fixed, but I have questions.

Failed after 6 months repair. 35MPH on country road set on cruise and this time it just goes to neutral. Had been shifting perfect. Had reverse, but no forward gears.

Failed 6 months ago on mild acceleration in a parking lot. Same symptoms. Shop said the sprag failed. This time, again the sprag failed. Fluid was perfectly clean, correct level.

I am a diesel mechanic, and know trannys, but just don't repair them, just replace and adjust. Cost of special tools not warranted.

Shop said they almost could not find the defect, there was no scoring or obvious damage. Hairline crack. I did not see the old part.

Was planning on giving car to my daughter, as this car is immaculate and would be a nice gift. But if I am giving a gift that is highl likely to fail, I must think twice.

I can find nothing online that indicates the sprag on this tranny is prone to failure nor nothing that would cause it.

Any ideas?

Wayne

Reply With Quote
  #2  
Old 11-12-2012, 12:54 PM
is thinning the herd
 
Join Date: Mar 2010
Location: Columbus, Ohio
Posts: 3,338
Have you looked into the B1, K1, and K2 springs? I think the B1 failing is capable of taking out the forward gears but I am not a transmission guy.

Search for information about those springs on the forum. They are cheap from the dealership and easy to change.
__________________
68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500

Nissan GTR - Nissan Skyline GTS25T - Toyota GTFour - Rover Mini - Toyota Land Cruiser HJ60 - Cadillac Eldorado - BMW E30 - BMW 135i
Reply With Quote
  #3  
Old 11-12-2012, 01:06 PM
Stretch's Avatar
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
I haven't come across any one mentioning that the sprag clutch has gone on either 722.3 or 722.4 or 722.5 before - Mercedes usually call it the freewheel.

You can see in this picture when it is used (it is the column headed "F")=>



I think that it was most probably working if you had reverse.

The usual culprit for "no forward gears (well it is the 1st three actually) but still have reverse" is the B2 piston.

I encourage you to have a look at the transmission yourself!

722.303 in bits photo shoot
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
Reply With Quote
  #4  
Old 11-17-2012, 06:42 PM
Registered User
 
Join Date: Oct 2006
Posts: 16
It failed Again

In the shop now warranty repair. Same symptoms. No forward gears.

Talked to the mechanic. Damndest thing I've ever seen, he said. It would hold one time, then not the next. Sprag.

Never had one do this, he said.

should get it back next week.
Reply With Quote
  #5  
Old 11-22-2012, 06:18 PM
Registered User
 
Join Date: Oct 2006
Posts: 16
So Embarrassed he said

Mech left the pin out of the B2 band. The sprag was bad the first time, but the second time it was error.
Shop foreman is driving it to put some mileage on it.

Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 08:35 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page