4L80E question
05-22-2012, 06:07 AM
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Car: 95 9C1,99 Sierra,90Sierra,00 sierra
Engine: TBI350,LM7,LT1,Vortec 350
Transmission: 700r4,4L60e,4L60e,4L80e
Axle/Gears: 10 bolt,14bolt,3:42,3:73,3:08,3:73.
4L80E question
i have a 4l80e in my gmc c2500 its got 3:73's,at 40mph im at 1500rpm.And the lockup is at around 50mph which im hardly ever at since i drive roads that mostly 45mph that cops lurk on,my question is can i lower the lockup.My 4l60e with 373's in my other nbs sierra runs at around 1100rpm at 40mph but i noticed the lockup is at around 45mph.
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