1996 GMC Sierra/Transmission


Old 04-04-04, 09:50 AM
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1996 GMC Sierra/Transmission

Hello All,
My problem today is transmission (automatic-4 spd) shifting. I have to get the RPMs up high to get it to upshift or downshift. I believe the trans. model is a 4L60 (16 bolt pan). During operation, the torque is very low and the resulting speed is low as well. I asking if there is any way to determine whether my problem is torque converter, fluid pump or what. I've changed the filter and screen and had a slight temporary improvement in operation. Thanks.
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Old 04-04-04, 12:48 PM
billys68ss's Avatar
Join Date: May 2003
Location: USA
Posts: 1,459
Sounds like time for a rebuild. You are loosing pressure somewhere. Those trannies are known for weak pumps and losing pressure. Do your homework and find a reputable transmission shop to give you a 100% for sure diagnosis.
Hope this is helpful to ya,

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