Chevy Gmc Aam 8.25 Front Ifs 4x4 Differential Forgot I Bought !

B&R Racing

solid fixture here in the forum
I discovered why the 1999 Chevy Tahoe 4x4 Has has a wandering issue finally at times low speeds gradual turn of the steering wheel into a turn or coming out of turn.
Most often felt getting onto highway on ramps and off ramps.
Thought it was poor Valveng used in the Saginaw Steering box too low effort .
Had it on the Laser 4-wheel alignment machine and alignment completed by myself.
Thrust angle Ok near perfect.

I checked the front IFS diff and and decided to drain it.
I changed all fluids when I bought the truck in 2016.
Out came gooey goo mess !
Water got in some point in time, probably from Crazy Storm we had come through my area August 10, 2020, A Derecho high constant winds and Super Rain.
Remember having to drive through deep flooded roads.
Went right though in 4x4 High.

The spider gears in the front IRS Differential are apparently shot.
Rebuild kits hard parts priced out last night.
Looked on Ebay 1997-1999 Chevy GMC used 8.2 IRS.
Still out there but slim pickings now.
Then this morning I remembered I bought a spare 1999 Chevy Tahoe 4x4 IRS 8.2 Differential in my basement stashed away !
RPO Code GU6 3.42 :1 .
3.42 Gears front and Rear if my Tahoe.
The used diff I recall I bought from an Ebay Seller in Pennsylvania. It's in very good shape. Just needs a cleaning.
Pinion seal no leaks.
Going to replace the outboard axle shaft seals before installing into my Tahoe 4x4 this week soon next day or 2.
 
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