Rear End Help!

Ryannn · Sep 13, 2011

I have the 8.8 3.73 Limited slip rear end, It makes a chirping noise and I was told it was the clutches? Can someone explain this stuff to me? I dont get anything about Limited Slip or How I fix that stuff... :dunno:

Thanks Ryan!! :icon_cheers:

Cadger · Sep 13, 2011

the limited slip uses a clutch pack inside the rear axle to prevent one wheel from getting more power under hard acceleration. and due to the naturally heavy foot of people who have an LSD, they got worn out easily!

inside the carrier of your axle are clutch packs that wear out. possibly the clutch packs need to be replaced, and the fluid changed... aswell as the proper friction modifier added.

it's not overly hard to do, just time consuming, and a lil frustrating if you've never done it. i'm sure you can find information and changing them on here somewhere. best of luck!

Ryannn · Sep 13, 2011

Is it pricey?

doorgunner · Sep 14, 2011

back in the day at the dealership, we would drain the oil out of the rear end & refill it with automatic transmission fluid. Then we would drive the car thru town making lots of turns at intersections for about 45 minutes. Then we would drain out the transmission fluid and refill the rearend with the correct oil/additive.

That usually solved the chirping/jerking problem when turning corners...if it didn;t help, the cluctchpack was replaced.

Sasquatch_Ryda · Sep 14, 2011

Like as in your tires chirping around corners?

adsm08 · Sep 14, 2011

Ryannn said:
Is it pricey?

I priced this out for my swap axle. With fluids and the axle and pinion seals I was looking at a little over $150.

BRUTUS_T_HOG · Sep 14, 2011

sounds like the fluid needs changed and friction modifier added.

basically the clutches are grabbing tightly and not slipping around corners, the friction modifier is worn out.

changing the fluid is the cheapest try you have.. if it doesn't work then live with it or replace the clutches.

is there an echo in here?

Ryannn · Sep 14, 2011

Its not just around corners... it just normally does it driving..

Sasquatch_Ryda · Sep 14, 2011

If this was the truck that you just bought it is possible the previous owner didn't use any friction modifier in the diff so that the clutches would hook up better....

Ryannn · Sep 14, 2011

Whats a friction Modifier...?

Sasquatch_Ryda · Sep 15, 2011

A fluid you add to a limited slip differential so that it does not chatter and cause tire chirping.

shane96ranger · Sep 15, 2011

I agree with Sasquatch. It's about 12 bucks for a 4 oz. bottle (all you need) at the Ford dealer here.

EDIT: Wow, it's much cheaper through Summit. How close are you to Summit Ryan?

http://www.summitracing.com/parts/FMS-M-19546-A1

Ryannn · Sep 15, 2011

shane96ranger said:
I agree with Sasquatch. It's about 12 bucks for a 4 oz. bottle (all you need) at the Ford dealer here.

EDIT: Wow, it's much cheaper through Summit. How close are you to Summit Ryan?

http://www.summitracing.com/parts/FMS-M-19546-A1

34 miles.

Ill be sure to change my dif fluid and grab that stuff!

shane96ranger · Sep 15, 2011

Nice! I thought I remembered you saying they were pretty close to you.

Ryannn · Sep 15, 2011

Yeah! Its so nice living close to them! I can order parts at my house drive there and just pick them up and not have to wait!

Rear End Help!

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