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Old 12-04-2011, 03:55 AM   #1
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92 gt 8.8

Does anyone in here know how to replace or rebuild the clutch packs in a rearend? My posi does not work anymore now my back tires break to quick and on wet pavement it want to fish tail alot. Any help
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Old 12-04-2011, 04:16 AM   #2
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Quote:
Originally Posted by 93stang
Does anyone in here know how to replace or rebuild the clutch packs in a rearend? My posi does not work anymore now my back tires break to quick and on wet pavement it want to fish tail alot. Any help
Are both tires spinning? Tires breaking loose doesn't necessarily mean the traction loc is bad.
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Old 12-04-2011, 08:02 AM   #3
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No as far as I know just one.
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Old 12-04-2011, 09:00 AM   #4
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Originally Posted by 93stang
No as far as I know just one.
Usually if the rear is sliding around both tires are spinning, usually.
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Old 12-04-2011, 09:51 AM   #5
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No If. Both tires spin then u won't get sideways or fishtail.
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Old 12-04-2011, 09:59 AM   #6
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Originally Posted by 93stang
No If. Both tires spin then u won't get sideways or fishtail.
Id say the exact opposite...the only way to break the rear end loose is by spinning both tires!...
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Old 12-04-2011, 10:01 AM   #7
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Originally Posted by 93stang
No If. Both tires spin then u won't get sideways or fishtail.
Think about it. If only one is spinning what's the other one doing? The other one will be holding traction keeping the car stable. If both are spinning what's keeping the car stable(straight)? Nothing it will be sliding out. This is not my opinion these are facts.
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Old 12-04-2011, 10:03 AM   #8
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Quote:
Originally Posted by 93slowstang

Are both tires spinning? Tires breaking loose doesn't necessarily mean the traction loc is bad.
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Originally Posted by deadsp0t

Usually if the rear is sliding around both tires are spinning, usually.
The clutches could still be worn out if he's sayin on wet pavment they break loose...but fixing the clutch pack would probably only make it break loose faster in the rain!..sound right?..
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Old 12-04-2011, 10:13 AM   #9
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Yup. Are you talking about a wet road? If not, then how many black marks are left?
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Old 12-04-2011, 06:25 PM   #10
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Re: 92 gt 8.8

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No If. Both tires spin then u won't get sideways or fishtail.
Both tires spinning are what causes a car to fishtail.
If one side has better traction then the car will pull to that side.
That's why when drag racing you want to ensure that both rear tires are equally inflated.

Here's a link to a gear installation that has information pertinent to a rebuild.
8.8 Gear Install
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Old 12-04-2011, 08:04 PM   #11
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Ok so if my clutch packs r bad then just one tire will spin and cause me to fishtail. My gf has a 02 gt and u can't spin tires or fishtail in it. If u turn the posi off then u can spin out
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Old 12-04-2011, 10:15 PM   #12
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Quote:
Originally Posted by 93stang
Ok so if my clutch packs r bad then just one tire will spin and cause me to fishtail. My gf has a 02 gt and u can't spin tires or fishtail in it. If u turn the posi off then u can spin out
Ur not turning the posi off, ur turning the traction control off. If only one tire is spinning, ur clutches COULD bad but it's not gonna cause to fish tail, you need both tires to spin for that to happen. If both tires are getting power equally and you are fish tailing, then that can be caused by tires having unequal pressure, one rear shock being more worn than the other or even worn suspension components such as LCAs. In a perfect world, the car should go straight, but it ain't a perfect world.
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Old 12-06-2011, 04:04 PM   #13
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Ok I just went out just a min ago and Burt tired pretty good. Looks like I only have one tire leavin marks and I did not fishtail. I already know my front and rear suspension is bad so I'm going to start there and see if that does not correct it.
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Old 12-06-2011, 04:28 PM   #14
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Quote:
Originally Posted by 93stang
Ok I just went out just a min ago and Burt tired pretty good. Looks like I only have one tire leavin marks and I did not fishtail. I already know my front and rear suspension is bad so I'm going to start there and see if that does not correct it.
If you got the one wheel peel, then you need to have your differential repaired. The clutches are bad.
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Old 12-06-2011, 04:31 PM   #15
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Ok so if both smoke tires then I don't need it replaced?
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Old 12-06-2011, 04:44 PM   #16
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Ok so if both smoke tires then I don't need it replaced?
Correct. As soon as you start seeing one wheel spin, it's time to replace since it's only gonna get worse.
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Old 12-06-2011, 04:48 PM   #17
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Ok do what all do I need to rebuild the car it's self only has 85,000 miles
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Old 12-06-2011, 04:49 PM   #18
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Re: 92 gt 8.8

If both tires are not spinning equally when on a level, compatible surfaces, then your rear end needs to be rebuilt or replaced.
Nothiing you do to the suspension will help correct the problem you have with the rear end.
You need to rebuild or replace the rear end.
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Old 12-06-2011, 04:52 PM   #19
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Ok is this something I can do or do I need to take it somewhere
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Old 12-06-2011, 05:12 PM   #20
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Re: 92 gt 8.8

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Ok is this something I can do or do I need to take it somewhere
You need to take it to a reputable shop.
Special tools and knowledge are required to get it done correctly.
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Old 12-06-2011, 07:33 PM   #21
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Well I will have to say that sucks. So do I need to do gears and all or just clutch packs?
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Old 12-07-2011, 01:23 AM   #22
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Re: 92 gt 8.8

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Well I will have to say that sucks. So do I need to do gears and all or just clutch packs?
That's up to you, but it would save some money to do the gears and rebuild at the same time.

Read through this article - 8.8 Gear Install - and see if you think you are comfortable attempting it yourself.
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Old 12-07-2011, 09:16 AM   #23
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Ok I went out to a parking lot and did a burn out and I left 2 tire marks.
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Old 12-07-2011, 04:21 PM   #24
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Re: 92 gt 8.8

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Ok I went out to a parking lot and did a burn out and I left 2 tire marks.
Looks like the posi is working there, however they can reach a stage where they work intermittantly and still need a rebuild.
Have you ever changed the oil and put in more additive?
That might be something to try before a rebuild.
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Old 12-07-2011, 04:57 PM   #25
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Quote:
Originally Posted by Trojan Horse

Looks like the posi is working there, however they can reach a stage where they work intermittantly and still need a rebuild.
Have you ever changed the oil and put in more additive?
That might be something to try before a rebuild.
Agreed. By looking at the pic, the track-loc is at least working. I would put in new fluid with the required amount of friction modifier and see how that goes.
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Old 12-07-2011, 08:03 PM   #26
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What about using Lucas additive?
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Old 12-07-2011, 08:05 PM   #27
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What about using Lucas additive?
I dont belive thats a friction modifier as much as a lubricant additive..
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Old 12-07-2011, 08:09 PM   #28
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Ok I have some valvolive 80w90 for limited slip cars is that what y'all are talking about
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Old 12-07-2011, 08:25 PM   #29
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Ok I have some valvolive 80w90 for limited slip cars is that what y'all are talking about
It would say friction modifier on it.it will be a small bottle.like 4-6 ozs maybe.

---------- Post added at 08:25 PM ---------- Previous post was at 08:19 PM ----------

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It would say friction modifier on it.it will be a small bottle.like 4-6 ozs maybe.
And it smells pretty bad.lol
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Old 12-07-2011, 08:26 PM   #30
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Yeah I think the 8.8 calls for 4oz of friction modifier...
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Old 12-07-2011, 09:13 PM   #31
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The 8.8 Does use 4 oz of friction modifier I would definitely change your rear diff fluid out and add those 4 oz of friction modifier along with what ever your rear diff fluid. After you change the fluid out go to a parking lot and drive in some figure 8s to make sure both packs are lubed up properly
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Old 12-07-2011, 09:38 PM   #32
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Ok I have some valvolive 80w90 for limited slip cars is that what y'all are talking about
That's the stuff. Also add 4oz of friction modifier.
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Old 12-07-2011, 10:41 PM   #33
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Got royal purple in mine, no need to add friction modifier but also expensive as hell.
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Old 12-08-2011, 06:19 AM   #34
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Got royal purple in mine, no need to add friction modifier but also expensive as hell.
Still is good to have it.the master install kit from frpp comes with royal purple and friction modifier.
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Old 12-08-2011, 06:41 AM   #35
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Got royal purple in mine, no need to add friction modifier but also expensive as hell.
It will work without friction modifier, even with regular off the shelf oil. You need friction modifier in ford differentials in order for them to work correctly and lockup like it should.
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