Wonder what kind of Fuel Economy we could get if we could get the RPMs down to 2200 at 70MPH. I'd bet still pretty close since it'd take more guts from the engine to turn 70MPH at 2200 RPMs.

Anyone achieved 70MPH at 2200? I'm guessing someone here's got that kind of gearing now. I've read about rear end and manual 5 speed swaps etc...

on the other hand... and of course someone here had to say it are we really saving money by putting a 'high quality' GM transmission in our Mercedes. Replacing transmissions every 100k isn't exactly cheap! I'd put money on a MB transmission outliving one from a GM by 2x the mileage any day. But I do have an 84 GMC 6.2 Diesel Suburban with 260k on what I believe is the original transmission! I suppose that says something.

__________________
-E300d '99 350k
-Suburban '93 220k
-TDI Jetta '03 350k
Sold
-F250 '96 7.3
-Dodge Ram 12V
-E320 '95 200k
-E320 Wagon 1994 155k
-300d Turbo '87 187k miles
-E320 1994 200k
-300d Turbo '84 245k (sold to Dan62)
-300d Turbo '84 180k
-300sd '80 300k
-7.3 Powerstroke Diesel 15P Van 500k+ miles
-190d '89 Non Turbo 2.5 5cyl 240k (my first MB)
Tom's Imports of Columbia MO Ruined the IP in changing leaky delivery valve O-Rings - Refused to stand behind his work. Mid-MO MB drivers-AVOID Tom's.