transmission is not keeping up with motor what do i do?

Asked by Guru9FWCF Jul 22, 2017 at 06:40 AM about the 1994 GMC Sierra 1500 K1500 SLE 4WD Extended Cab Stepside SB

Question type: Car Customization

i have a 94 gmc 350 rebilt changed the fuel
injected carb with a carborated carb i have the ez
efi hooked up but the tranny is not keeping up with
the moter shifting hard and dosnt go into over
drver is that somthing i could fix or need a shop for
that??

1 Answer
4,075

Capn_Steve answered 6 years ago

The 94 1500 was the first year for the 4L60E (electronic) transmission. In order for it to work It needs inputs from a computer, to control shifting. It sounds like you are missing the inputs from the engine and the trans is in limp mode. You need throttle position sensor, vehicle speed sensor, coolant temperature senor, and a tach signal.

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