I have never run the worm gear style True Trac. They intrigue me, but I would think it would have a torque limitation. I have the regular ol' clutch limited slip. I have around 500ft*lbs going through 31splines with MT ET Streets and have not busted anything yet. In fact the clutches have been planting the power pretty nice. I may need to replace them in the next year or two, but everything has held up.

 

thanks for all the help guys...looks like im going to be upgrading to 31 because it's really not that much more money wise...now i just need to decide between true track and a clutch style limited slip...urban cowboy, where did you get yours from? this will be a street car on drag radials. I'd like to say it won't see the track but i know eventually ill run it a couple of times just to see what its capable of. For the most part however, it will remain on the street wearing D/R's. Did you guys also build your rears yourself? or did u have a shop do it?

 

The True track is generally stronger than a standard limited slip. The parts are solid and the whole carrier assembly is much beefier. Standard limited slip has typical differential carrier parts, spider gears, side gears and the gear retaining bracket(which can flex and break). Posi styles are still strong, but a True Trac is stronger, and more expensive.

 

My vote goes for a traction lock unit. I think you'll be fine with the 28 spline axles. Most of it depends on how you will be driving the car too.

 

True, but I wouldn't feel comfortable doing regular drag launches with sticky tires on a TrueTrac. That's what lockers are for. Serious off-road guys shy away from TrueTrac or Torsen diffs because they have a tendency to go "boom" when tires go from spinning to grabbing instantly.

 

There are tons of True Tracs that drag launch all the time without issue. The off road guys have given it a bad name by being retarded. When you get a tire stuck in a rut so it won't spin, and you apply force through a unit that increases power to the wheel with more resistance, what do you think is going to happen? Combine that with extremely strong axles and a ton of rear gear so you put most of the load on the differential side, and of course the unit breaks.

You apply enough force to anything and it will break. Misuse doesn't mean a part isn't strong enough though.

 

Heh, I see your point

 

thanks for all the help guys...ive decided with a true trac set up and 31 spline axles. im not quite sure who im ordering it through yet. moser is kinda pricey. i also have to finish taking the rear apart so i can black off all the rust and paint it b4 i start building it. starfury, did you build ur own rear?

 

Have you looked into currie? They sell a direct bolt in with is super easy to install. Kinda pricey though too.

 

Personally I'd go with Currie. The guys there are really helpful, answer emails promptly etc. You know exactly what you're getting.