Dear friends:

According to Haynes manual, the proper fluid for this car's manual transmission is Type A ATF. However, it seems that some people here either use REGULAR engine oil (what grade?) or even gear oil (90).

So what's the best fluid to be used for a 1981 240D's manual transmission?

Thank you.

Best regards,

Eric

Best bet, type A ATF, or you could even use Mobile One ATF.

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Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.

ericnguyen

Dont use motor oil or 90w. I use synthetic ATF. It only takes a couple quarts so its not much of an expense but regular ATF will work fine.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

Of all the manual trans lubes I have tried RedLine MTL is the best. While everything else did the job the RedLine product actually felt much slicker and smoother when shifting. You are gonna want regular MTL not MTL 90. www.redlineoil.com RT

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When all else fails, vote from the rooftops!
84' Mercedes Benz 300D Anthracite/black, 171K
03' Volkswagen Jetta TDI blue/black, 93K
93' Chevrolet C2500HD ExCab 6.5TD, Two-tone blue, 252K

was having trouble shifting the manual transmission in my 240d. did a search and was impressed by the passionate plea of mr. bible to use 10w-30 motor oil. po had used gear oil. a drain and fill with the above mentioned motor oil solved my shifting woes. that was 20k miles ago. fyi.