Re: Transmission Swap

Posted by Ross On 2017/4/13 6:38:54

A small mathematical thought on economy. My experience with countless miles of driving these mid fifties barges that have all the aerodynamic qualities of a barn door is that on the highway you can get oh maybe 17 mpg on a good day if you don't push it too hard and stay under 70. Both my 56 Clipper with TU and 3.07 rear and the 51 200 with overdrive (2.95 cruising ratio) do about the same.

But lets say a Patty is only churning out 15mpg. Now by some transmission miracle you get it up to 20 mpg. That saves 4.2 cents per mile based on $2.50/gallon gas.

It will take you slightly over 60,000 miles to pay for a $2500 trans conversion, if you can get it done and in the car for that much.