1999 tach & trans
99 blazer 150k. Trans done at 105k. the issue i am having is after i am at highway speeds for longer than an hour. when i get off the highway and driving about 40-45mph, rpm at 1500 the tach rapidly fluctuates between 1000-1500 rpm and the trans feels like it shifting back and forth. i don't know if its mechanical or electrical. Any info would be helpful
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Originally Posted by max wedge
(Post 515857)
99 blazer 150k. Trans done at 105k. the issue i am having is after i am at highway speeds for longer than an hour. when i get off the highway and driving about 40-45mph, rpm at 1500 the tach rapidly fluctuates between 1000-1500 rpm and the trans feels like it shifting back and forth. i don't know if its mechanical or electrical. Any info would be helpful
Your trans is a 4L60e ? Sounds like the torque converter is not staying in lock-up mode ... check all the usual suspects - fluid level , color , smell .... Then look at Your throttle position sensor |
fluid level, color, and smell look good. How do i check TPS ?
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Originally Posted by max wedge
(Post 516617)
fluid level, color, and smell look good. How do i check TPS ?
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