So my 2004 tahoe 5.3l has started acting up in 4th gear. It will cruise just fine at 75 but will not hold any speed above that unless I shift it into 3rd. All other gears work fine, it is lifted on 33s but has been this way for a while and it started this a few weeks ago. The torque converter will lock (if you hold the accelerator and lightly press the brake it will unlock and jump up about 500 rpm). I am getting crappy mileage, about 11 on free way. Any ideas on what could be causing this? I have a diablo programer on the way and one of the options is to clean the TCM memory, would this help or no?
Weird problem with 4th gear
- Thread starter jxw004
- Start date
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SLCHOE
ASE Master Certified + (L1)
Clearing TCM memory will just erase any codes that are stored and reset all adaptive memory (ie: learned shifting patterns, etc).
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