The trans in the 84 started to make a noise like a stuck or starving bearing, corresponds to wheel speed, not engine speed, not the driveshaft bearing.

1. Ideas?
2. Will the trans from a similar vintage V8 126 bolt in as a replacement?

Jerry

JerryBro,

Since no one else responded and your question was clear enough I understood it, I will pass on my thoughts, hoping someone with more experience with automatics pipes up.

First, I would think about changing the automatic transmission fluid and the filter. This, from reading other posts is not really difficult, just possibly a little messy and there is some concern with retightening the fasteners to avoid leaks. They get a precise torque, in a sequence and pattern or the chances are you will have leaks. Also, when draining the old fluid out, be sure you drain the torque converter as this unit apparently has a separate volume of fluid trapped in it. Do a search if you attempt this as there are many threads on the subject.

Next, I would look at the transmission and engine mounts. A sound short to the vehicle's structure can make a relatively insiginficant noise sound like the machine is coming apart. The purpose of the mounts is to isolate these noises and when the mounts get old they can transmit more noise than intended, and worse, they can allow things to get misaligned causing unintended loads on bearings and allowing sound shorts.

Last, I do not think a V8 transmission is a direct substitute.

Hope this helps, Jim

__________________
Own:
1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

Owned:
1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)

Thanks Jim. I'm ordering a filter and gaskets from Fastlane. I really hoping I don't have to open the tranny up.

Jerry