Burnouts!

hey i hav a 2001 Silverado LS extended cab 4x4. It has a 4.8L engine and the transfer case for the 4x4 is mounted on the floor. Does anyone know if this truck has positrac?? When doing burnouts, sometimes i can get both tires to spin but most of the time its only one. Usually if i gradually apply gas i can get both of them to spin but if i floor it i only leave one strip. My friend has the same truck except with a 5.3L but he can get both tires to light up EVERY SINGLE TIME! nomatter what he does(taps it, floors it, gradually gives gas, etc.) i bought the truck used so maybe the differential is just messed up?? but if anyone knows anything about posi trac or anything that can help me get both tires to light up then please reply. Is there a cheap solution?

My '92 has an open differential and I've been able to get both tires to spin before too, but generally it's just the passenger side tire.

i got the same problem

does anyone know how to make both tires light up without paying 900$ for the posi?? my friend said i could get the gears welded together but i wanna be able to go around corners without squeeling.

See if you can find a junkyard rearend with the G80, like one from a Z71. Mine both spin every time, even is one is off the ground.

hey i hav a 2001 Silverado LS extended cab 4x4. It has a 4.8L engine and the transfer case for the 4x4 is mounted on the floor. Does anyone know if this truck has positrac?? When doing burnouts, sometimes i can get both tires to spin but most of the time its only one. Usually if i gradually apply gas i can get both of them to spin but if i floor it i only leave one strip. My friend has the same truck except with a 5.3L but he can get both tires to light up EVERY SINGLE TIME! nomatter what he does(taps it, floors it, gradually gives gas, etc.) i bought the truck used so maybe the differential is just messed up?? but if anyone knows anything about posi trac or anything that can help me get both tires to light up then please reply. Is there a cheap solution?

Check in your glove compartment to see if you have RPO code G80. G*) is the code for a locking rear differential

Yea, getting one of a Z71 from a junk yard seems like it would be the cheapest thing. Thats what im probly gonna do. But that is a locker, not a posi......by the way, can anyone tell me WTF the difference is between the 2?

my friend said i could get the gears welded together

Do not do this. That would get old QUICK. Sacrificing driveability for being able to do burnouts.

Also, its a 4x4, why the heck are you doing burnouts anyway?

Also, its a 4x4, why the heck are you doing burnouts anyway?
The same reason I do!!! Because I can! And it looks cool too. :)

can anyone tell me WTF the difference is between the 2?

A true locker and posi are basically the same thing. The G80 is a Limited slip differential if I'm not mistaken. The difference is...the LSD will supposedly take power from the wheel with the least traction and give it to the wheel with the most, therefore making it possible to move. A true posi trac, or locker (like detriot for example) locks both axle shafts together much like a spool when your going straight, but then in turns they will unlock with a loud clunk and allow the rear tires to turn at different speeds making it easier to turn and reduce tire wear.

The same reason I do!!! Because I can! And it looks cool too. :)



A true locker and posi are basically the same thing. The G80 is a Limited slip differential if I'm not mistaken. The difference is...the LSD will supposedly take power from the wheel with the least traction and give it to the wheel with the most, therefore making it possible to move. A true posi trac, or locker (like detriot for example) locks both axle shafts together much like a spool when your going straight, but then in turns they will unlock with a loud clunk and allow the rear tires to turn at different speeds making it easier to turn and reduce tire wear.

allrighty then.. Thanks for clearing that up

I've seen guys install sprayers in the Fender wells just in front of the rear tires. It's sprays a fine coat of water, bleech, or slippery lubricant on to the tire. You just spray a bit on for a couple of tire rotations and your good to go. Popular in Burnout Competitions or show cars. Basically the squirters are like your window washer sprayers just mounted in the fender...

i went to a junkyard but unfortunatly they didnt hav any wrecked newer trucks. so i went to another place and they didnt hav any G80's either but the guy told me that he could order a brand new one in and hav it installed for 900 but he said that the genuine gm posi is weak and that he could put in a better quality one in for 1000. but i still dont hav that kind of money:(! any other suggestions??? o ya and wut are those fender sprayers that chuck16 is talking about??

The same reason I do!!! Because I can! And it looks cool too. :)



A true locker and posi are basically the same thing. The G80 is a Limited slip differential if I'm not mistaken. The difference is...the LSD will supposedly take power from the wheel with the least traction and give it to the wheel with the most, therefore making it possible to move. A true posi trac, or locker (like detriot for example) locks both axle shafts together much like a spool when your going straight, but then in turns they will unlock with a loud clunk and allow the rear tires to turn at different speeds making it easier to turn and reduce tire wear.


No, the G80 is a locker http://traction.eaton.com/prod2.htm

I know I like to keep my books and lunch in there :lol2:

My bad. I thought it was a LSD.

i went to a junkyard but unfortunatly they didnt hav any wrecked newer trucks. so i went to another place and they didnt hav any G80's either but the guy told me that he could order a brand new one in and hav it installed for 900 but he said that the genuine gm posi is weak and that he could put in a better quality one in for 1000. but i still dont hav that kind of money:(! any other suggestions??? o ya and wut are those fender sprayers that chuck16 is talking about??


you have seen the cars at the race track do burn outs with lots of smoke. thay use bleach to get the smoke rolling. it also eats the tires up just a bit to make them softer, for better grip off the line.

the sprayers is just a window washer unit installed under the finder wells. it will let you sit in the cab and spray a bit of water or bleach mix to get the tires to brake free and spin.

i went to a junkyard but unfortunatly they didnt hav any wrecked newer trucks. so i went to another place and they didnt hav any G80's either but the guy told me that he could order a brand new one in and hav it installed for 900 but he said that the genuine gm posi is weak and that he could put in a better quality one in for 1000. but i still dont hav that kind of money:(! any other suggestions??? o ya and wut are those fender sprayers that chuck16 is talking about??


I don't know where you live but iam in Canada, and everything here costs an arm and a leg more than in the states lol, and i just had an eaton posi installed for $825. I was not out of wanting one but necessity, not only are the factory G80 units weak but so are the factory carriers and spider gears. That price would have bennm higher if i had not caught it at the time that i did and luckily the crown, pinion and bearings were all still good.

They aren't all G80's. I have a GT4, which is a locking differential with a 3.73:1 gear ratio. I guess mine works pretty well cause I can't get more than a short squeal from my tires. I'm sure I could if I really wanted to beat on her.

They aren't all G80's. I have a GT4, which is a locking differential with a 3.73:1 gear ratio. I guess mine works pretty well cause I can't get more than a short squeal from my tires. I'm sure I could if I really wanted to beat on her.
no, GT4 simply indicates a 3.73:1 gear ratio. I have a GT4 ratio and a G80 locker. Both RPO codes are in my glove box

hey i hav a 2001 Silverado LS extended cab 4x4. It has a 4.8L engine and the transfer case for the 4x4 is mounted on the floor. Does anyone know if this truck has positrac?? When doing burnouts, sometimes i can get both tires to spin but most of the time its only one. Usually if i gradually apply gas i can get both of them to spin but if i floor it i only leave one strip. My friend has the same truck except with a 5.3L but he can get both tires to light up EVERY SINGLE TIME! nomatter what he does(taps it, floors it, gradually gives gas, etc.) i bought the truck used so maybe the differential is just messed up?? but if anyone knows anything about posi trac or anything that can help me get both tires to light up then please reply. Is there a cheap solution?

I only have 1 question.......WHY? :headshake

I only have 1 question.......WHY?

Well because it looks cool and its actually kinda embarrasing when only one tire spins.

Paid $350 for my Eaton, installed it, and have never had a one wheel smoke show since. Now two......there's a different story. Hands down one of the easiest/cheapest mods to date.

Side note....back in 02 I had a stock g80 installed at my local stealership. Cost me around $800 give or take. It worked OK at best. When I had the 4.8L with the Superchips, Airaid, and exhaust system, I was still getting one wheel action on occation.

After the swap over to the 6.0L, I was extremely overpowering the stock unit. It would come unlocked doing the burnout, then it would come unlocked at around the 61ft mark and smoke up one tire.

With the Eaton...my slicks are finally wearing on both sides.