It seems than at Thu, 24 May 2007 15:38:11 -0400, Mike wrote: > Actually Phillip, the exact opposite is true with diesel engines and manual > transmissions.
Well, I _was_ talking about diesel engines and manual transmissions. I presume you mean when in a car. *smile* > Most failures I have encountered occured due to very high > temperatures generated by large amounts of torque running in high gears. > There is MUCH more stress on the input and mainshaft bearings of a manual > tranny under full torque in a higher gear. The lower the gear the better > for the tranny but the worse for everything behind the tranny. Interesting. So it isn't over-torque that causes the failure? I guess if the enemy is heat, that makes sense. But the output shaft and the counter shaft will be subject to the torque multiplication of the gearing. So if the wear is torque-induced, those will suffer. But if the cause of the wear is _not_ just torque - well, then I guess I'm barking up the wrong tree. Maybe those early failure swaps didn't use a correct flywheel... -- Philip, guessing again!