need help with posi/std rear end

CamaroCliff · #1 (**permalink**) 04-22-2006, 09:21 PM

heres my dillema. i just bought a 92 Camaro RS. i was trying to figure out what gear ratio my rear end is. it seems awful low, cuz it likes to squeel tires alll the time, when going into gear, when taking off, when cornering... this is a v6 car. my 86' was a 350 before i started all its current 383 stuff... and it will not chirp the tires at all, its geared way high, like an indy car, some dummy previous owner did that.... well i was doing a little research on the axle numbers to find out exactly what i have. in the 92' the axle housing number is 6HJ. according to the Haynes repair manual, that is a 3.23 posi rear end. (from a 1988/89) page 8-9 for you who have this book. sounds great to me, but heres my problem. if its a posi, then why does is squeel 1 tire soooo easy. leaves 1 black mark all the time. is it possibly a different gearset in there? i also was reading up on posi problems, and alot of people have had problems where they had straight gear oil, without the posi addative in there. maybe this is it... call me a cheapass, but im out of work right now on disability and pulling it apart just to find out right now is just out of my pricerange, i know i would find out for sure if i do, but wondered if anyone familiar with rear ends and such could give me some useful info. normally i would just drain it, refill it with the posijuice, but right now, im not sure if its even a posi, and dont have 20 bucks to spend on gasket/oil... is there a way i can find out for sure without pulling the diff cover? if it is indeed a posi, and its been run for a while without the addative, will it cause damage? it may have already?? i just dont know. ive only had the car 2 weeks. i appreciate any input i could get on this, helpful or not. thank you

oh by the way, have a video of what im talking about 1 wheel burnout
http://www.youtube.com/watch?v=zQmNv45pLfw
http://www.youtube.com/watch?v=1mKLGhGs8C8

WishIHadACamaro · #2 (**permalink**) 04-23-2006, 01:51 AM

We are going to need a differential expert on here.

I had an 89' V6 RS. The poor sore bitch wouldnt ever squeal the tires unless i was hard on her in a corner.

But if i brake torqued her, it would do a one-wheel-wonder burnout. This I assumed was because of a limited slip differential. Which is the only thing i can assume with yours is that Haynes misprinted the code for the car in the manual.

Wish i could be of more assistance.

CamaroCliff · #3 (**permalink**) 04-23-2006, 01:49 PM

any differential experts in here?!?!?! PAGING DIFFERENTIAL EXPERTS. WE NEED A DIFF EXPERT TO ISLE 4 FOR HELP.

Godhatesimports · #4 (**permalink**) 05-09-2006, 07:22 AM

Could be a few things

A: you dont have a Posi rear end, which is very common on V6 models

B: You're Differential is worn out and the plates arent doing their job

I dont think the gear oil would make a difference in how it performs, but its definatly not good for to be running it without the oil/additive. Do you have alot of gear "howl"? If your car has door codes you can search it up and see exactly what your rear end is equipped with. I feel your pain, my V6 was a open diff 3.08 geared piece of shit, now its an Eaton Posi equipped boasted 3.42's Motive gears, alot of fun.

CamaroCliff · #5 (**permalink**) 05-09-2006, 10:48 AM

according to the codes, it is a posi rear end. and also according to the axle code right on the axle housing. my guess is the plates arent working. next week i can take the cover off and check it out, i wont know much to do in there... except look around see what it is, clean it up, change the oil, and put new gasket on. guess thats just what im gonna have to do. and for the other ?... no it hasnt made any axle noise at all.

thanks for everyones help, ill let you all know when i find out.

Rare4thgens · #6 (**permalink**) 05-10-2006, 03:22 AM

When you opened it up, did you see clutches inside? Does it click in reverse or around corners? The RS was available with a posi in the 4th gen but I can't remember on the 3rd. To figure out your ratio, count the number of revolutions on the driveshaft and compare it to how many times the wheel rotates, then you have your ratio. Cheap or not, posi additive doesn't cost as much as a ruined posi unit, if you do indeed have one, if you want it to work and last, stick it in there but since you lay a one wheel wonder you might not have one. I can decipher the code some time this week if you don't get to it, also, I might be able to through the VIN.

CamaroCliff · #7 (**permalink**) 05-10-2006, 05:49 AM

well i havent openned it yet. but i did put in the posi-juice. i have noticed a time or 2 that both wheels will spin, but usually one. i have another theory. the brake shoes/pads are in good condition....but the springs and hardware is all rusty as can be. they work good, i bled them all, took one side apart, because a spring was in backwards... :smt071 and i fixed that, while doing so, i noticed the adjuster was rusted shut. so i oiled it up and got it free spinning, also tightened that up a little bit. put it all back together. heres my theory on the 1 wheel wonder.... its only a v6, so this burny is a 'brake-torque' ... suppose one rear brake catches earlier or more then the other one?@#$% bingo. the driver side locks, (along with the front 2) .....leaving the rear passenger wheel to rip up that part of the street. only way to solve it (IF) that is the problem. is to redo all the brakes, and make sure they are adjusted and bled evenly. and the only way to find out (IF) that is indeed a true theory, is to squeel tires without the brakes.... or rear brakes i should say. well im not putting a line lock on this car, so i imagine a brake job is in the works. i dont like to let the shop do much of anything to my cars. but i think i would be able to afford a brake job, and trust they do it right. oh yeah, the other option to find out, of course is yanking that v6 out and putting some real balls in it, but since its a 25th anniversary edition, and worth alot more then i paid for it (according to kelly blue book at least) i think this will be the only v6 Camaro that i own that will stay a v6. out of the 8 that i have owned, 6 came as v6's and ended up 305,350, or 383. 1 was a 383 when i bought it, and this one makes the 8th. well ive rambled on too much already. *just got home from work 0430 here. need to go to bed.

Rare4thgens · #8 (**permalink**) 05-11-2006, 03:28 AM

I think you may have answered your own question. Drums have less drag then a disc making it easier to spin in general and if one is and that little V6 is turning it, the other would go if ask me. If the brake was hold one and it was even a worn posi, I think your car would struggle bad to turn the tires.