Several years ago when I was in college (and before I turned my own wrenches), my '78 300CD's tranny dropped and since I was about 1-month from graduating and moving back home. I opted to take my car to AAMCO to have the tranny rebuilt, and I had them warrant it for life.

Now, about a year after the rebuild, the tranny started leaking. I called them and they looked at it and told me not to worry, it wasn't a major leak. Now recently it finally blead out enough that it wasn't shifting properly and needed to be fixed. I took it back to them and they told me they changed some seals, and I can tell they did something around the shifter since it is much firmer now, however, I had a pool of red fluid under my car when I went to work this morning and it was about 7" in diameter. I called the shop and they told me to let it go for a week or so and see if the rate decreases and that nearly all of the MB Trannys they've seen leak.

I call BS since my transmission never leaked before, and the 300D's preferred fluid of choice for marking territorry is motor oil (and mine doesn't leak oil!)

Am I wrong, or do I need to take my car back and stand on someone's desk? As a Mechanical Engineer, I'm well aware that these issues do not solve themselves.

Thanks in advance!


Scott

'78 300CD 230,000mi
'88 560SEL 71,000mi
'89 560SL On Wishlist

I think someone is blowing smoke up your arse. They should not leak BUT how many years has it been since they rebuilt it?

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Jim

Tranny guys rate down there with used car salesman in my book. I hate automatics because I can't rebuild them. I would think if the tranny is right, it would not leak a drop. Do you think it leaked when it was new? They made their money and why want ot avoid doing anything else. There are plenty of new people to rip off.

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Doug

1987 300TD x 3
2005 E320CDI

MB trannies rarely leak. Check the cooler hoses though, they could've cut one of them. Pinpoint exactly where the leak is coming from.

A drop on the floor once a month maybe, 7" puddel overnight NO.

John Roncallo

I concur!

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2006 BMW M5 "Heidi" @ 109,000 miles
2005 MBZ C55 AMG "Lorelai" @ 165,000 miles
1991 MBZ 300E "Benzachino II" @ 165,000 miles
1990 MBZ 500SL "Shoshanna" @ 118,000 miles

(On the hunt for a good used M103 engine as of 6/10/23, PM me if you have one to sell!)

Scott and all:

I owned and operated an AAMCO for 12 years.

I assure you if you have a Lifetime warranty that transmission is their responsibility for the life of the vehicle as long as "you" own it.

I never told anyone a transmission "suppose to leak" and any transmission should not.

AAMCO is as good as you can find as their techs are the best and best trained in the field.

AAMCO's warranty is also the best.


If you still have a problem call the customer service in PA.

John1

John1-

Thanks for your message! I'm going to give it a week and if I'm still not happy then I'll do as you sugget. I really appreciate getting an opinion from someone whose been on the other side of the counter!

It is frustrating though when you take a car in becuase the transmission leaks and it comes back leaking worse. Aslo, ownership of the car has not and will not change since the warantee was purchased.


Thanks again for the reality check!


Scott


'78 300CD
'88 560SEL