View Full Version : No posi? WTF
Alright well I was messing around on my friends street and he told me to do a burnout, so I left a pretty long burnout down his street. Anways he sends me a picture and its a one tire fire!
So on top of what I already have planned for the car, would a used 4th gen rear end be a decent idea? Should a rebuild be in order if I decide to go through with it? How hard is it to do?
Input needed!
KB93z28
10-10-2012, 02:49 AM
Not sure what your best route would be, but my car did this the other day, it ALWAYS grabs posi, I linelocked second, and then walked it out, and the next day.....one leggah haha
My84Z
10-10-2012, 03:02 AM
If you are a 6 speed get a built rear like a 9" if your auto a stock rear is fine
black heartbeat
10-10-2012, 05:42 AM
^^I second that, blew my rear end on bald tires with half throttle
Automatic. Would I be better off with an ls1 rear end?
ILuvPizzaTimes10
10-10-2012, 01:12 PM
ls1 rear end is the same except the brakes and rear diff wich hasnt proven to me its stronger. Plus you would have to swap the brakes over anyway. so LT1 rear with a higher(numerically) gear would be best. the highest gears GM used in the A4's was 3.23 im guessing you dont have them as they came in special packages in the LT1. SS/WS6 Mostly. So get a 3.23 or 3.42 rear end. BUT with getting a used rear end you run the same risk of That posi being on the way out too. just some food for thought.
My84Z
10-10-2012, 02:13 PM
Get whatever you can find with the least miles there are small differences tothe posi's but i don't feel any are stronger then the other.
I ls1 rear end is the same except the brakes and rear diff wich hasnt proven to me its stronger. Plus you would have to swap the brakes over anyway. so LT1 rear with a higher(numerically) gear would be best. the highest gears GM used in the A4's was 3.23 im guessing you dont have them as they came in special packages in the LT1. SS/WS6 Mostly. So get a 3.23 or 3.42 rear end. BUT with getting a used rear end you run the same risk of That posi being on the way out too. just some food for thought.
Mine has 3.23 gear option. Only reason I asked was because of the brakes because I want to upgrade them at some point.
But when I go through with this, strength really is the same for all 4th gens (minus the sixers)
DemonWithin99
10-10-2012, 03:33 PM
mine has 3.23 too :crazyhi:
84ta406
10-10-2012, 03:38 PM
Ive got a Moser 9" for sale, wont break that one :)
Ive got a Moser 9" for sale, wont break that one :)
just let me sell my liver real quick
ls6monte
10-10-2012, 04:23 PM
Ive got a Moser 9" for sale, wont break that one :)
Hell I broke my Moser 9" back in 1994 after one year in the car with the old 408 sbc. The traction lock diff I originally had broke.
SLP IROC-Z
10-10-2012, 05:51 PM
the torsen may not be stronger but it doesnt go to shit like an auburn. theyre both crap but the auburn wears out super fast.
Formula413
10-10-2012, 09:13 PM
93-98 cars had the Auburn limited slip differential, 99-02 had a Torsen posi. The Auburn has clutches that can wear out and are not rebuildable, the Torsen doesn't have wear parts but can fail mechanically. Pick your poison. If you plan lots of power in the future spend the money for a 9", if not find a 3.23 or 3.42 ten bolt, and if possible try to find one with verifiable low miles. You might also be able to find a posi unit by itself for sale, I've seen them come up on eBay occasionally.
ILuvPizzaTimes10
10-10-2012, 11:41 PM
If you want to just get the posi unit I can throw it in for you. Might even come out cheaper in the long run then save for a 9" or 12 bolt. Or just leave it and save for a goodddd rear end.
Well I don't think serious power will be in the future. Is the posi unit opt to break occasionally? And I would certainly be willing to do business with you
black heartbeat
10-11-2012, 05:59 AM
I have like half of a posi with 3.73s if you want it....
ILuvPizzaTimes10
10-11-2012, 12:54 PM
The auburn like alex sed is in all lt1 cars and its a "clutch" style posi. They wear based on there inherit design. and I personally have broken spider gears in them. Not strong. And once they wear they are throw away. So now what do you do. A4 with not a lot of power plans in the future there are a few aftermarket differentials these days that are loads better then the stock pieces. Eaton sells one called the HD. That's a pretty good unit. And if people say 10 bolts don't hold up at all. Ask sam about running 10.50's on a stockkk 10 bolt! It can be done.
Camaro9969
10-11-2012, 03:15 PM
Ive had 2 10 bolts 6 speed car over 15 1.6 60fts they obv are pretty weak but i never broke one When i had the 410s it was great. If you can swing a new rear def get one if not buy a lkq they come with a 6 month warranty and beat the shit out of it. the rear is a easy swap only a few hours.
I just need one durable enough to last a few years. I don't know when ill do the swap but would people be willing to help?
Update:
Posi doesn't work in 1st gear but all other gears.
ZFreie
10-12-2012, 12:09 PM
I just need one durable enough to last a few years. I don't know when ill do the swap but would people be willing to help?Ill be doing a rear swap at some point as well, where are you located?
Update:
Posi doesn't work in 1st gear but all other gears.Try cutting the wheel and see if it will lock one way or the other, mine seems to like to grab turning left and not right, also, I know with mine, it has the tendency to just blister one tire if you just smash the throttle, if I ease into it and try to hook it will lock up both tires.
Food for thought, I picked up a low mileage 3.42 rear out of an ls1 car to swap in, you can find them for pretty cheap if you keep looking, could be a crap shoot for the posi but, but for me the the cost of gears and a new posi alone made buying a whole slightly used one much cheaper and given this one has lasted 175k, im not overly worried about killing another lol. Have to swap axles and brake backing plates but nothing crazy hard.
jayws6
10-12-2012, 08:35 PM
Ask pizza I broke a stock ten bolt on a iron headed lt1 impala SS motor at track with a eaton posi hance (3,0000 dump it )with4:10
Ben there split diff in two and snap pion shaft in 1/2
So if daily driver swap used rear in ad hole unit save for upgrade
I now have moser 9" with a wave lock diff with 36 spline axels a life yes life time warranty, most only have a year
Only thing is wave lock cost I paid two years a go 800 I think but now ther like 1200$
Ask pizza I broke a stock ten bolt on a iron headed lt1 impala SS motor at track with a eaton posi hance (3,0000 dump it )with4:10
Ben there split diff in two and snap pion shaft in 1/2
So if daily driver swap used rear in ad hole unit save for upgrade
I now have moser 9" with a wave lock diff with 36 spline axels a life yes life time warranty, most only have a year
Only thing is wave lock cost I paid two years a go 800 I think but now ther like 1200$
Yeah its my DD.
I plan on taking it off the road for the winter and upgrading the brakes, suspension, and now the rear end
SLP IROC-Z
10-17-2012, 02:29 AM
Update:
Posi doesn't work in 1st gear but all other gears.
because the clutches are to weak to hold the torque
because the clutches are to weak to hold the torque
Well I know squat about axles so what should I replace?
My84Z
10-17-2012, 03:14 AM
Posi should be rebuilt or replaced. Cheaper to get another rear out of another f body
Posi should be rebuilt or replaced. Cheaper to get another rear out of another f body
Well come winter time I will do some searching. Thanks
Camaro9969
10-20-2012, 03:09 PM
Just either buy a good one or go on Craigslist. I've seen 10 bolts for 200 bucks everywhere
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