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  #1 (permalink)  
Old 06-07-2018, 06:07 PM
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Location: Denver, CO
Cobra Make, Engine: Superformance Mk3 with Roush 427R
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Default Replacing Differential Seals?

I have output shaft seals that are leaking pretty badly and a small seep on the input shaft seal of the rear end.

Does anyone know if there a quick way to do this in the car or do I need to drop the rear end?

Locking the input shaft would be complicated by the fact that there is no hand brake when the drive shaft is out but a brake pedal prop against the seat would fix that.

It looks like there might be enough room to get the axles out of the way and pop the output flanges out if it is put together that way.

I was going to call Hillbank for seals but what rear end is it? I seem to recall it being a 2004 GTO unit.

TIA!
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Old 06-13-2018, 11:02 PM
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Default

Since there were no replies, I thought I would post what I found out....

The '04-'06 era chassis use a Pontiac GTO Dana LSD unit. The axle seals are a failure point and are replaceable in the car. The parts needed are as follows:

(2) GM Shaft Seals: 92140236 (about $22 each from Tasca parts)
(2) Torco RGO Racing Gear Oil A248514CE 85W140 1 Liter (Summit Racing, it takes just under 2 liters)
(1) Torco Type F Friction Modifier AFM0050JE 4oz (Summit Racing, you add 2oz at the beginning or middle of the fill)

The Torco is the preferred oil of the GTO crowd to deal with whine and clunking issues.
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