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RPMs increase and decrease while driving

Tiny
DAVEC1953
  • MEMBER
  • 2005 JEEP GRAND CHEROKEE
  • 175,000 MILES
My vehicle will increase rpm's to 4000 then decrease. When it goes up again, it clunks. Speed remains pretty much the same.
Sunday, March 18th, 2018 AT 9:40 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

Does this happen with the engine in neutral or while you are moving?

Roy
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Monday, March 19th, 2018 AT 1:45 AM
Tiny
DAVEC1953
  • MEMBER
  • 2 POSTS
While moving. Noticeable when driving in the highway, fifty to sixty mph.
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Monday, March 19th, 2018 AT 5:38 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, that sounds like the transmission is not shifting from a lower gear.

Does it have any codes set?

Roy
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Monday, March 19th, 2018 AT 6:34 AM

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