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Here's a remanufactured extension housing for 700R4 and 4L60E transmissions.
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It's 2WD, 4-bolt tail, cast number 8642547.

Made by General Motors (OEM quality).

Includes the housing, seal, bushing, and o-ring—everything you need.
Surface finish is excellent, direct replacement.

Material is aluminum, drive type RWD.
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If your tail housing is cracked or leaking, swap in this rebuilt one.

No UPC, but it's solid.

5 out of 5