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Old 06-22-2008, 07:15 PM
Roncallo Roncallo is offline
88Black560SL
 
Join Date: Oct 2004
Location: CT
Posts: 3,538
Quote:
Originally Posted by cth350 View Post
With some careful tuning, you should be able to boost that 450SL from 9mpg to perhaps 14mpg. Which would be a noticable savings. But to change the transmission, you're looking at some major surgery which will never, ever pay for itself. For instance, the correct 4-speed that mates up to the motor will cost you about 1,000$ along with the clutch, flywheel, shifter, pedal, etc.

-CTH
I was under the impression we were talking automatics. I think a 4 speed from a later 560SL would bolt in they are both 117 engines???.
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