Blackbird-WS6

iTrader: (15)

9inch rearend with 31spline axles and truetrac...

Whats the most rwhp you people have seen with this setup without breaking??

ssvert99

iTrader: (26)

Can't put a real number to that question... too many things affect how a diff unit will last in different applications. One guy may have 1200hp but only weigh 2600 pounds, an other guy may only have 700 hp but at 3200 pounds, but the guy with 600 hp and a M6 car on slicks is the one with a broken Truetrac...

garygnu

a auto with a mild stall will be less destructive then a trans brake or a manual trans.ask Bob from brutespeed about what you mention could handle.

Blackbird-WS6

iTrader: (15)

i did, he said 600rwhp but i wanted to see what people have to putting down with the same setup, axles dont really bug me, its the posi unit, but locker cant be used with 31 spline if i remember right

ssvert99

iTrader: (26)

why not go with a Wavetrac diff and never look back? we can get them in 31 spline and they carry a lifetime warranty. keep in mind a Truetrac uses different axle lengths also that most people selling diff units probably don't know about.

Bob@BruteSpeed

iTrader: (16)

Like I told you in my reply to your pm, I wouldn't go and pay for a Wavetrac for your 31 spline axles and have it limit any future horsepower goals. With your plans of hitting it with a 250 shot of nitrous, I'd upgrade to 35 spline axles at the same time and go with the Wavetrac. Bob

SuperSlow02

iTrader: (16)

I never broke my truetrack, but I was having problems with it spinning the left side only "sometimes". Absolutely nothing was wrong with it when we pulled it out and went to a spool. I'm very interested about different axle lengths...because I didn't know that, kinda too late now but I'm guessing with my spool, it dosnt matter?

Bob@BruteSpeed

iTrader: (16)

I have the axle lengths listed here on my website listed under Moser axles. Bob

Moser Axle lengths:

Truetrac: 33 7/16 passenger side
30 3/8 driver side

Trac-Loc: 32.875 passenger side
30 3/8 driver side

Spool: 33.00 passenger side
30.50 driver side

Blackbird-WS6

iTrader: (15)

what are the axle lengths for a detroit locker?

Bob@BruteSpeed

iTrader: (16)

35 spline locker would be same as spool, and 31 spline locker is same as Trac-Loc. Bob

SuperSlow02

iTrader: (16)

What can Happen with running the truetrac axles with a spoil? I was unaware of the difference when I bought mine 4yrs ago lol. Just swapped to the spool back in July. I havnt noticed anything myself..... If I have to change axles, I'd rather just redue it all. Go to a high spline count and all.

aaronware76

iTrader: (2)

I have a similar issue. From watching videos of myself at the track heating the tires up, my left rear wheel spins far less than my right. I'm 31 spline with a truetrac also. However, I make 440rwhp and dump the clutch at 5-6k all day long and it's held up. Unfortunately, I'm not dead hooking tho. Best 60' is a 1.68.

Bob@BruteSpeed

iTrader: (16)

You got it together and you've been running it since July, so I would say you don't have anything to worry about. Sometimes if the axles are too long you can grind a little off the end without messing up the splines. In your case apparently it went together just fine. Bob

Bob@BruteSpeed

iTrader: (16)

With the Truetrac you're going to have conditions where one tire may spin less than the other, as it is a limited slip. Bob

The Detroit Truetrac is the first gear type limited slip differential in the industry. It's patented design of parallel axis planetary helical gears provide a quiet, automatic splitting of torque. Power transfer goes literally unnoticed by the driver – even in front wheel drive axles. The Detroit Truetrac performs like an open differential under normal driving conditions and automatically transfers torque to the wheel with better traction when ground conditions warrant. The limited slip responds instantly to torque feedback, anytime, at any speed. Available for 12 Bolt Chevy cars, Ford 8.8 rear ends, and Ford 9 applications, the Detroit Truetrac’s proven design, low cost and effective performance make it the choice of off-road, street, and strip enthusiasts everywhere.

SuperSlow02

iTrader: (16)

LoL thanks bob....gotta love it when mistakes don't cost you money

Bob@BruteSpeed

iTrader: (16)

No doubt, sometimes things do work out! Bob