Putting 4.10's in, thinking of new positrac unit?

The stock 28 spline carrier is a decent piece and can handle A LOT MORE Thrashing than most people think, but nows a good time to upgrade since it's going to torn apart anyway.

I went with a 31 spline FRPP Trac-Loc and Moser axle shafts. The FRPP one is good unit. It's the same one used in F Series-Expedition/Navigator front axles and on the Explorer/Mountaineer and Ranger 4x4's. It will handle plenty of power. I'm not sure about the Auburn one's, but I'm willing to bet they are good. They've been around a long time.

Crimson4.6 said:

Thanks for the quick reply man. Anyway, I was thinking of upgrading to 31 spline axles, but then I thought to my self that I am nott going to be making anyseriou hp or be thrashing on it too much. The posiunit will be upgraded as a "just in case" factor.

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If that's the case, then I'd just leave the stock one in there. My buddy Dale has the stock 28 spline rear(with 3.73's) in his 01 GT with a Vortech and on M/T ET STREET tires. He leaves the line at 5,000RPM and the car run's consistent 12.20's (12.1's with cooler temps).He probabally has 125+passes down the 1/4 and No problems so far. (knock on wood) It's going to let go some time, but so far it's done a pretty damn good job in my eye's. Most people don't think the stock rear is that great, but it's a lot better than you think

The only reason I went with 31 splines was "JUST IN CASE".

I'm glad I did, 'cause if all goes well money wise this winter, A Vortech S/C will be under my hood next spring!

A LOT of US say, that we don't plan on doing many mod's, but once you start, it's hard to stop. It's kind of like getting a tattoo. Once you get one, you want another. I always thought I'd stay N/A, but after a ride in Dale's S/C'd 01 was all it took.