The 8.8 Clutch Pack Replacement
I was pumped up today because yesterday I ordered my wheels and tires. So I have to get the front and rear axles ready. The front is good to go...got the rotors mounted today. The rear, i had to do some finish welding on the control arm brackets and replace the clutch packs in the 8.8 center section. One of the things that I wanted to point out was the way that the 8.8's were put together back in the day. When I was a machanic back in the 80's and 90's we use to get a lot of the 5.0 mustangs with rear diff problems. Most of them had burned out clutch packs from JR. side steeping the clutch at 6000 rpms, so we would take things a part and replace the bearings and clutch packs. One of the things that we noticed back then was the clutch pack setup. Ford put a friction plate against the gear which left a gap in the contact pad of the friction plate. We worked around that by putting one of the steels against the gear then a friction, then two steels, one friction, then one steel, then one friction, then the shim. In the pictures you can see the gap I'm talking about. Also the difference in measurement between the old pack and new pack do not include the ridge that the gap left...so the .632 was more than likely .620 - .625...very loose for 8.8. Hope this helps others that are doing the same thing...if not I guess I typed all this for nothing. HaHaHa!
I'll finish putting the rear together tomorrow night. Wheels and tires should be here by Wednesday...might have a full roller by Friday!
Step 1 - Soak new clutch pack in gear oil
Step 2 - Remove ring gear (mark it before you remove)
Step 3 - Remove S-Spring and spider gears by removing the cross pin retainer then sliding out the cross pin itself. (be very carful removing the retainer...if its been in there for a while and abused...it might break!
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Step 4 - Remove side gears (make sure to remove shim...normally stick inside housing)
Step 5 - Replace clutchs S-F-S-S-F-S-F-Shim
Step 6 - Replace side gears in housing
Step 7 - Replace spider gears
Step 8 - Replace S-Spring (Not Fun!) There is a special tool for this, but I don't have it! I just beat the thing in with a pieace of wood. Be careful doing so.
Step 9 - Replace Cross pin and new retainer...use proper torque specs
Step 10 - Replace ring gear...use proper torque specs