I am assuming I have the 3.69 now. I have been using this page as a reference. I actually spoke to the guy who runs that page and has a 4spd 616 power W115 I think it was? But same drivetrain and tire size with a 3.07 and he said he would absolutely do that swap again over the 3.46 I was considering.

http://mbturbo.com/gear-ratios/

All stock drivetrain in my car. If it sucks, I will find a 3.46 to put in it.

Also found this post, Kent said he has done a 300D turbo rear (so should be 3.07) end swap on many 240Ds and he doesn’t seem to feel the loss on the low end outweighs the lowered highway.



I have tweaked my IP a bit and bumped timing. The car feels very strong (for a 240D [emoji3]) right now on the highway from 50mph on up in 4th. Truthfully, I would swap a 3.27 but it doesn’t seem like that is something I’ll realistically be able to find.

I have found very few people documenting their experiences after the fact with a manual trans 240D and rear end gear changes but the few I find are happy with 3.07s. I planned to write a thread up after I made the swap.