Which Diff to get for my 12bolt?
Which Diff to get for my 12bolt? (GM 12 bolt 3 series carrier 33 spline)
My truetrac is clunking like crazy. If i get under the car with it in neutral and the ebrake set I can still rotate the driveshaft around 60-75 degrees. So it's time to replace it since they're not rebuild-able. I know I don't want another trutrac, but not planning on spending 900-1000 on a wavetrac. What are my other options. No spools, this car will see a lot of RC/ autox not just drag.
Thanks
Jim
My truetrac is clunking like crazy. If i get under the car with it in neutral and the ebrake set I can still rotate the driveshaft around 60-75 degrees. So it's time to replace it since they're not rebuild-able. I know I don't want another trutrac, but not planning on spending 900-1000 on a wavetrac. What are my other options. No spools, this car will see a lot of RC/ autox not just drag.
Thanks
Jim
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
We have to know what spline your axles are to know what is available for you. Detroit locker would be the next step up in strength I would think, however some do not care for their locking/un-locking feeling. Pretty sure Auburn and others make cone type posis for 12 bolts that are around the Tru-Trac's price (~450-ish).
For Auburn you'd want the Pro Series. Auburns are non rebuildable but they have the D-Rex program where they will replace it with a new one no questions asked for 4 years. Eaton makes a clutch type posi that is rebuildable and I think there may be different rate springs you can put in it to vary its limited slip characteristics. I've read of people that also install a extra clutch plate in each side of a Eaton to make it more locked up.
It's too bad your Truetrac didn't hold up. They're supposed to be a great diff for Auto X.
It's too bad your Truetrac didn't hold up. They're supposed to be a great diff for Auto X.
For Auburn you'd want the Pro Series. Auburns are non rebuildable but they have the D-Rex program where they will replace it with a new one no questions asked for 4 years. Eaton makes a clutch type posi that is rebuildable and I think there may be different rate springs you can put in it to vary its limited slip characteristics. I've read of people that also install a extra clutch plate in each side of a Eaton to make it more locked up.
It's too bad your Truetrac didn't hold up. They're supposed to be a great diff for Auto X.
It's too bad your Truetrac didn't hold up. They're supposed to be a great diff for Auto X.
Trending Topics
Have you taken off the diff back cover and checked everything out? Is your Truetrac making crunching sounds or behaving strangely other than the excessive amount of play? I don't see how the Truetrac could develop play without making all sorts of bad noises. They are a close tolerance precision unit, when the helical gears get damaged the broken pieces cause all kinds of havoc.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo Have you taken off the diff back cover and checked everything out? Is your Truetrac making crunching sounds or behaving strangely other than the excessive amount of play? I don't see how the Truetrac could develop play without making all sorts of bad noises. They are a close tolerance precision unit, when the helical gears get damaged the broken pieces cause all kinds of havoc.
I would look at an Eaton HD, I broke mine (spiders) once, upgraded the spider and never broke it again. It went 1.47 60ft with a 6spd.
I will send you an email with the guy I bought the spiders from. You can likley buy the complete unit with the spiders from him. I have a Wavetrack now in my 9".
PM sent.
I will send you an email with the guy I bought the spiders from. You can likley buy the complete unit with the spiders from him. I have a Wavetrack now in my 9".
PM sent.
