Visit The Dirt Forum for More Information

Author Topic:   dirt car diff
Dirt Roller

Total posts: 8
posted March 06, 2005 07:53 PM  
Does limited slip or posi-track diffs work on dirt track?

Dirt Freak

Total posts: 238
posted March 07, 2005 05:33 AM  
It would work great. Problem is, at most tracks it is ILLEGAL.

Dirt Freak

Total posts: 402
posted March 07, 2005 09:29 AM  

What are you talking about?

Dirt Roller

Total posts: 21
posted March 07, 2005 09:47 AM  
I've never heard of that. Now traction control would be another issue.

Dirt Full Roller

Total posts: 33
posted March 07, 2005 09:59 AM  
What he might be refering to is IMCA, who require a spool, mini-spool or welded rear. Limited slip differentials work, but they wear out. Pull the posi, sell it to some street hot rodder, and get yourself a spool.

Dirt Forum Champ
Total posts: 1363
posted March 07, 2005 10:05 AM  
a detroit locker is awesome on the dirt.

Dirt Freak

Total posts: 238
posted March 07, 2005 11:18 AM  
Every set of track rules I've read stated "locked rear end, no limited slip, posi, lockers, etc." Are there tracks that allow positracks??

Dirt Forum Champ
Total posts: 1876
posted March 07, 2005 12:28 PM  
Gold tracs are supposed to work well. but like teampcr said they are illegal. also easy to tech for, just paint a line on the both tires, then make the car drive in a tight circle. then see if the lines are still matching up. very easy to get introuble for. also hard to tell when a rearend like that is going out.
just stick to a locked rear and work on other parts of the car as far as money wise.

Dirt Forum Champ
Total posts: 755
posted March 07, 2005 12:37 PM  
I've heard of a few guys that ran the ratchet type rearends and didn't like them. YOu never really knew when the thing was going to engage/disengage.

Rat Trap
Dirt Maniac

Total posts: 129
posted March 07, 2005 08:57 PM  
Rule for my track

"Full steel spool, steel mini spool or welded rear ends only"

Dirt Roller

Total posts: 6
posted March 08, 2005 02:14 AM  
I've run a gold trac in my pavement car. I'm here to tell you they are awesome when they work right. They are how ever very expensive and very very touchy. You have to pull it out of the car every couple races and go through it. The big benefit is if you run different tracks all the time. If your a little off on rear stagger the gold trac will make up the differance by unlocking when one tire is "draging". I also ran a locker it works the same way but it's just not as smooth as the gold trac. I would replace the spring in the locker about every 10-15 races. Thats the only thing I ever had to do with the locker. If you run one track I don't think it's worth the money or time for either one. Find the happy stagger and lose the extra rotaing mass it creates. If your going to travel to alot of different tracks it might be worth it. You can also lock it up to be legal at your home track if you want.

Dirt Maniac

Total posts: 148
posted March 08, 2005 12:42 PM  
Detroit locker would be great when the track dries and you drive down low around the bottom of the turn. I crewed a late model in the late 80s that had a trick quick change rear end. You could lock it up or allow the detroit locker to function by changing 1 axle shaft to a longer one.

Some People Race For A Living; I Live To Race

Back to the Archives