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Symptoms:
  • Planetary failure
  • Planetary wear
Cause:

Insufficient lube oil and/or excessive clearances.

Correction:

This kit offers replacement parts for rebuilding damaged rear planet assemblies and gives rebuilders the option of replacing only the worn components.

4L65-E, 4L70-E

Planetary Rebuild Kit

Part No.

77732-RK

Planetary Rebuild Kit
  • 77732-rk_combo

  • Planetary Rebuild Kit

Small_77732-rk_combo Small_77732-rk

4L65-E, 4L70-E

Planetary Rebuild Kit

Part No. 77732-RK

  • Helical Pinion Gears (5)
  • Solid Pinion Pins (5)
  • Needle Rollers (100)
  • Pinion Thrust Washers (10) Round
  • Tri-metal Thrust Washers (10)

5 Pinion Rear Planetary

Complaint:

  • Planetary failure
  • Planetary wear

Cause:

Insufficient lube oil and/or excessive clearances.


Correction:

This kit offers replacement parts for rebuilding damaged rear planet assemblies and gives rebuilders the option of replacing only the worn components.

The rear planetary assembly in GM 4L65-E transmissions frequently wears out and must be replaced. Planetary assembly wear is generally caused by insufficient lube oil and/or excessive clearances. Lack of lube causes excessive heat in the pinion gear area and causes the roller bearings to gall the gear bores and pinion pins. If there is excessive thrust washer wear or endplay, the roller bearings can run without fully contacting the gear bore, causing premature failure of the assembly. Sonnax rear planetary rebuild kit 77732-RK contains the replacement parts necessary for rebuilding damaged five-pinion planets.

  • Helical pinion gears made of case-hardened alloy steel
  • Needle rollers are closely toleranced to be used specifically with matching pins and gears
  • Kit can be combined with 77731-09 planetary bearing for a complete planetary rebuild
NOTE:

Can be used to service four-pinion planets with solid pins.

Related Parts

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Contact a Sonnax Distributor to purchase this part.