Warrior1876

Would building the rear with a limited slip differential help get off the line faster at the track. What is the best way to get off fast and not spin tires. What rear would you recommend?

ddmsgtr1

The best way to get off the line is to get better suspension and tires, not necessarily a new rear. Adjustable upper/lower control arms, preferably with spherical bearings. You'll need your tq. boxes reinforced and welded. If you want a tire that's going to last, Nitto DRs aren't bad. If you want something that's gonna stick more, get MT's, but you're not going to get the life out of them. A set of adjustable shocks wouldn't hurt either.

98redstang

OFFICIAL SUSPENSION GUIDE

Go with a LSd and 31splines and you can run slicks.

01 P-51G t

Sure, put in 4.56's and slicks.

I'd recommend 3.90's or 4.10's with 31 spline.

Warrior1876

I have a stock rear with 3.73 gears. I am worried about spinning tires at the track and heard that rebuilidng the rear may help that. I an a novice at this so i could be way off but would redoing the rear help tires from spinning on the track.

Warrior1876

Is stock 31 spine

Mustang_NTriangle

stock is 28. Going to 31" splines is not going to help your track issue, that would be suspension setup and tires.

You don't need upper control arms for traction. I would go with welded sub-frame connectors, lower control arms (w/spercial bushings) no rubber ****, and set of Nitto 555R drag radials.

If you have the funds then certainly go ahead and build up your rear end as well.

Warrior1876

Would a limited slip differential help with spinning tires on the track.

StriderTacticaL

I'm assuming you have a GT in which case your car does come with a limited slip differential from the factory. Unless the clutch packs within the differential are severely worn out, it's not really gonna make much of a difference upgrading the differential to another limited slip. Sure there are better limited slip or locking dfferentials, but the benefits will be minimal at this point.

Like everyone has said, if you want to hook and launch better at the track, work on getting better suspension and tires. Subframe connectors, gears, and a good set of tires will get you started on the right track.

The reason why people are suggesting to upgrade to a 31 spline is because really sticky tires like slicks will put a lot of stress to your stock rear end and will eventually break it soon enough.

ddmsgtr1

In higher hp cars, if you're not running an aftermarket rear, some people have the rearend jigged, trued, and braced as well as welding up the axle tubes to the center section to keep the rear from flexing under launch. I don't think you have the power at this point where you'll have this problem, or where that kind of investment is worthwhile. But I would call that far past just a simple rebuild. FLSFC's are going to stiffen you chassis, LCA's are going to plant the tires, and adj. UCA's are going to allow you to make pinion angle adjustments, all of which are going to help you hook better. I did all 3 as well as an anti roll bar and having the tq. boxes welded. If you're on a budget where that's too much in one shot, do the FLSFC's and the LCA's with tq. box reinforcements.