Suburban park gear tries to engage while moving.

GMC C1500
89,000 MILES • V8 • 4WD • AUTOMATIC
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ERNIE SEACUB
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  • 1 POST
The suburban parking gear seems to want to engage while the vehicle is moving.

Transmisioon is tight and shifts well between gears but at about 10 miles an hour there is a terrible sound, exactly the same as when a car is shifted into park while the engine is reved too high.

On one occaission it jumped out of park into reverse.

Since its first occurrance the vehicle has not been driven at high speed only at slow speeds to help determine source and cause of sound.
Sep 16, 2008 at 4:40 PM
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BMRFIXIT
  • CERTIFIED EXPERT
  • 19,053 POSTS
Check the ring at the end shaft
remove drive shaft remove cone end at the transfer case (where the drive shaft does )
replace the snap ring and washer
Sep 16, 2008 at 5:49 PM