Gears

[91LX2Bfast]

I am going to disagree and say go w/ 4:10's. The 4R70W is a wide ratio trans, so the gears won't have the same negative affect on gas mileage as the old AOD's. I mean, of course you will lose a few mpg over 3:27's, but do you want good acceleration or 2 extra mpg? The difference in mpg between the 3:73's and 4:10's would be so small too, its worth getting the steeper gear IMO.
The only advantage I can see about getting 3:73's would be less tire spin on launch. but agian, the difference of the two gears would be minimal.


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1997 Thunderbird 4.6L: Dynomax cat-back, MN-12 perf. offroad downtubes and Y-pipe w/ Magnaflow resonator, 80mm MAF with cone filter, B&M trans cooler, Inject-Tech chip, MAC U/D pulleys, KVR front brake upgrade. 15.2 @ 91 before exhaust & pulleys. Not bad for a 3800lb auto 4.6L

No Longer own: 91 LX 5.0L 5 spd