Marauder - 4.10 Gears

A tune is absolutely required for 4.10 Gears, as there are needed changes to the transmission, shift points and speedometer, which can only be accomplished at the computer. Lidio was kind enough to include a program on the XCal2, for a Marauder with 4.10 Gears - obviously, this was a sign! With MVIII fast approaching, I decided to take the plunge, and had a set of 4.10's installed by my friendly neighborhood Ford Dealership (since I, like most people, don't have the special tools required for the install).

The difference is night and day! The extra low end umph is much appreciated - it should have come this way from the factory!

I followed my normal testing procedures (as described before), however I could not perform all tests on the same day. The gears have a lengthy break in period (500 miles), but the tests were performed with virtually the same conditions (temps within one degree)

End results:

 
60'
0-60
Pre-4.10 Average
2.32
6.28
Post-4.10 Average
2.16
5.89
Difference
0.16
0.39