jugheads88gta

why would my 9 bolt be slipping? so when i am spinning the tires the passanger tire is allways spinning and the driver tire wont spiin the it will start and stop and start and stop. it will only spin for a couple secs and stop for a while what is the deal???

subroc

iTrader: (2)

Worn out posi. When the 9 bolts get a lot of wear on them they dont work anymore (too much play in the posi). Time to pull it apart and reshim it. Here is an article you can follow that will tell you everything you should need to know about them. It assumes however that you know how to take the rear axles out (they bolt in at the bearings), and the carrier out.

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http://www.geocities.com/luckyducky_...air30Nov04.pdf
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jugheads88gta

yea i pulled my org 9 bolt out cause it had 170xxxx miles on it and i put this one in and it was said to only have 100xxx on it but idk ill try and find some shims and see what happens with that

Bullydawg

iTrader: (7)

Mileage doesn't have any say. Mine only had 82k miles when it started slipping. But then again, my car is a Lemon. Engine blew at 69k miles. Haha

tom86iroc

iTrader: (1)

did you put the gm additive in it ??

big gear head

The additive would only make it slip more. The additive is suppose to allow the clutches, or cones, to slip easier so that they don't chatter when turning. You are better off with as little additive as you can get by with and not have any chatter. The 9 bolt Borg Warner posi can be repaired at least one time. Burnouts are probably the worst thing that you can do to one of these. It causes them to wear very quickly, especially water burnouts.

RedLava

iTrader: (4)

why would a burn out cause excesive wear? the cones are not sliping the tires are.

Bullydawg

iTrader: (7)

What is the point in having posi if you shouldn't do burnouts. If you do not do burnouts, there really isn't a point in rebuilding one. I don't know about you, but I like to race my car and yes, the tires do spin.

mentaldeface

Amen

jugheads88gta

haha yes so do i.but thanks guy for all the help and support but as of 4:17 04/06/2009 my gray 88 gta is rip on the way home from school the motor shut off so i pulled it over on the side of the road open the hood it seemed t be a little hot maybe running at 235 temp max and so i was just letting it cool on the side of the road and all a sudden it went up in flames all my school books system every brand mew part my wallet every thing gone melted any thing not metal was melted and gone so i am very sad right now and i am no longer a third gen owner. for a little while maybe this weekend ill find another one

big gear head

A limited slip differential uses the pressure applied by the pinion gears pressing on the axle gears to lock it up. The preload springs don't do much for locking up the clutch in these differentials. The springs are there to help get it started. When doing a water burnout there isn't enough pressure on the gears to apply pressure on the clutch. When this happens it allows the clutch to slip. This causes heat and wear and soon it will wear out. Just look at the street cars at your local drag strip when they are doing their burnouts and you will see that many of them will start out spinning both tires, but one will slow down and then stop spinning. This is VERY hard on the differential and will eventually cause it to stop working.

The point of having limited slip or "posi" is to increase traction, not do burnouts. I know that burnouts are fun, so keep doing them if you have the money to repair the differential from time to time. It keeps guys like me in business.