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Transmission slippage

Tiny
KLBILL
  • MEMBER
  • 2003 GMC SIERRA
  • 6.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 374,000 MILES
In all gears when lightly accelerating I seem to have the engine rev up (slip) always from 2200 rpm to 2600 rpm.
If I accelerate hard there seams to be no slippage. Is this needing a transmission re-build or does the torque converter need replaced?
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Thursday, July 20th, 2017 AT 5:52 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
First scan for codes, but with your description i would say time for a rebuild especially with miles on it. does it slip in all gears or just one? a transmission professional can diagnose this fairly quick as most of these have the same problems. See link.
https://www.2carpros.com/articles/automatic-transmission-problems

You could try a transmission service but I doubt it will help much and additives do not work in my opinion.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
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Thursday, July 20th, 2017 AT 8:27 AM

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