# 4l60e Trans service question - GMC Safari

**URL:** <https://community.cartalk.com/t/4l60e-trans-service-question-gmc-safari/72668>\
**Category:** Maintenance/Repairs\
**Created:** [May 26, 2012, 11:35pm UTC](https://community.cartalk.com/t/4l60e-trans-service-question-gmc-safari/72668 "2012-05-26T23:35:25Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Jetop](https://avatars.discourse-cdn.com/v4/letter/j/b3f665/32.png) [@Jetop](https://community.cartalk.com/u/Jetop)\
**Post date:** [May 26, 2012, 11:35pm UTC](https://community.cartalk.com/t/4l60e-trans-service-question-gmc-safari/72668/1 "2012-05-26T23:35:25Z")

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Hey folks - I have a 2000 GMC Safari, my second such Astro/Safari beast, and have just noticed the beginnings of a tranny hick-up. I have 100,000mi on it, and just returned from a 500mi day trip in 95 degree weather. After several hours highway driving, I pulled away from a stop light she banged into 2nd gear a bit. My last Astro had the same problem, except it wouldn’t take near as much heat build-up, and once hot, the 1-2 shift would feel like the rear end was falling out. After some research, I have found that this is a common problem, and relates to torque converter overheating and premature tcc valve wear. The solution is replacing the valve, and installing a shift kit (I’m looking at a Transgo product). My question is, can I easily enough remove and reinstall the valve body without pulling the tranny, and for those who have done the job, what kind of special tools I may need. Thanks!