Quote:
Originally Posted by CDTurbo001
722.315 out of an '85 300TD. This transmission was making an audible growling noise (think bad unitized wheel bearing in a newer car - not a grinding or harsh noise, just a growl/howl) that corresponded to engine speed, but was drowned out at highway speeds. Was more noticeable inside than under the hood. It needed to come out to replace the pump seal, anyway, so I'm trying to determine whether there's any indicators in the pump or if it could be a plugged filter or bad torque converter.
All manuals I can find say "If front bushing has wear or damage, replace pump." All I see is evidence of light rubbing by the torque converter snout - no apparent damage or severe wear. Opinions?
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This is an old thread. However, I have pulled my front trans pump off to inspect the bearing shown in the pictures. The reason why is I had a non-Mercedes transmission that I replaced the front seal on leak again a few months later. Upon pulling the pump off of that I found that bearing was loose and worn. I suspect that too much pump pressure was reaching the new seal and causing the leak.
Back to the Mercedes trans pump bushing. I was looking for that bushing and there is not a lot of sources of it. Cobra Transmissions was a source at about $13 plush shipping. The other sources were over $20 plush shipping.
https://cobratransmission.com/index.php?main_page=index&cPath=1_988_990_1001_1005 Bushing
Have not looked at my bushing yet.
Another reason for pulling the pump is that I have since 2007 had a leak up front and the rear also. Kent be at that famous site has that if your transmission leaks sitting the leak could be the pump gasket and or the Pump O-ring as well ask the front pump/torque converter seal. In order to get at the pump O-ring the pump has to come out and one of the transmission pistons needs to be removed.
You should do your research on this because there is the bushing at the toque converter and of the pump and there is a bushing to the rear.