Trans. Fluid Change? - PeachParts Mercedes-Benz Forum

420benz · #1 01-27-2007, 07:04 PM

The pan does not have a drain bolt!
What is the torque on the pan bolts?

deanyel · #2 01-27-2007, 07:45 PM

Quote:

Originally Posted by 420 benz

The pan does not have a drain bolt!

Think allen head bolt.

softconsult · #3 01-27-2007, 08:20 PM

I think it may actually be 60 inch pounds which is 5 ft. pounds. Very light and even with a 1/4 " Ratchet.

Steve

softconsult · #4 01-27-2007, 08:28 PM

There is a drain plug, but you have to crawl under there and look for it. There is now way not to make somewhat of a mess. One thing you should understand is that if your catch pan is on the ground and the car is up on jacks the draining fluid will splash all over the ground. I always try to get the pan up close to the bottom of the pan. But you will still slop some on the ground.

Sounds like new territory for you. Be careful when you wipe out pan and not leave lint or dirt behind.

Steve

420benz · #5 01-27-2007, 10:20 PM

Thanks for all of the help.I will do this next weekend.

tvpierce · #6 01-28-2007, 07:31 AM

Quote:

Originally Posted by bribenz

steve; you may be right , the less the better ,i know it's not much , i've done mine several times , the first time i overtightened them of course and it leaked , now i torque them at about 8 to10 ft lbs , no leaks since,, there are spacing tabs on the pan at the bolt holes to keep you from tightening to much that you squeeze the gasket to the side or cut right through it but it's still tricky if you have not done it before ,also when you fill the transmission just put three quarts in then start it for a second or 2 , then add the rest as the fluid may come out the vent on top from too much fluid in one place , none in the converter , has this happened to any one else when filling the transmission with all the fluid at once ? ,, it happened the first time ,, never again ;;

Happened to me too.

Live and learn.

Jeff Pierce

softconsult · #7 01-28-2007, 08:28 AM

The pan bolt torque may also be different based on the transmission model.

I have only done '90 300E and '92 300E. These have no spacers and the torque is 60 inch pounds. I bought and inch pound torque wrench for that purpose, cheap on e-Bay.

When I crawled under the '97 S320, I found the spacers. This automatically puts the correct compression on the gasket. I just tightened the bolts to what felt right with 1/4 ratchet.

Steve

Peter Fearing · #8 01-28-2007, 06:00 PM

Did I miss something? I never changed the trans fluid in my '(97 ) C280, 100K miles and the trans worked fine. Think of it. Most trans changes only remove about 25 to 39% of the initial OE fluid. Trans are closed systems, so what happens to the synthetic fluid (other than a possible leak) that would require a fluid change? Oh, I also own a 30 year old Chevy Blazer. Never ( yet) changed the fluid. Have added, but the old Powerglide really works well. OK I must be a nut, right.