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Modified Item: No

Custom Bundle: No

Interchange Part Number: 77749

Surface Finish: metal

Manufacturer Part Number: 42298B

OE Spec or Performance/Custom: Performance/Custom

Other Part Number: 77749HDB

Brand: Pro Select

Fitment Type: Performance/Custom

Non-Domestic Product: No

Drive Type: 4WD,AWD,RWD

Manufacturer Warranty: Yes

4L60E 4L65E 700R4 The Beast Sun Gear Shell
Extreme duty upgrade for the 700R4 4L60E 4L65E transmission
Fits all units 1982-up

The original equipment sun gear shell is notoriously weak in the splined area.
Especially with 1996-on units, the originals are even less hardened!
Pre-'96, GM engines were TBI and idled at higher RPM after cold start and needed more hardness
to survive stripping (at least through the factory warranty period).

The Patented "Beast" is incredibly strong in comparison.  The splined area is considerably thicker,
and also reinforced by a large chamfered area to help resist twisting common with the thin stock type.
Please see comparison pic in the gallery!

US Patent No. 6,561,944

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