4wd actuator bypass and tranny damage
Asked by lakefork67 Feb 15, 2017 at 10:43 PM about the 1994 GMC Sierra 1500 C1500 SL Extended Cab LB
Question type: Maintenance & Repair
We have been having problems with the actuator on my
husbands 94 GMC Sierra. Our mechanic has worked on it
a couple of times and yesterday put a bypass in. I picked
up the truck and this morning when my husband got in it
to drive the transmission started slipping and he had
trouble driving it.
The mechanic said it had nothing to do with the bypass
installation but it seems awfully coincidental. This tranny
was rebuilt 150 miles ago and regularly serviced. We had
no indication prior to that anything was wrong.
Can someone tell me if this bypass could have had
anything to do with it?
7 Answers
GreasyPayne58 answered 7 years ago
What do you mean by Bypass? Is it a manual that requires you to pull a lever?
lakefork67 answered 7 years ago
It eliminates using the actuator for the 4WD.
You can use your old actuator as the bypass you just drill out the 3 rib pit. Pull it a part and you will see a little shaft just turn it counter clockwise until it is full extended. Then put just that part back into you truck and yes it will be hard to thread end because you have to fight the spring tha engages the front. But it will go in. Note you only need the part that screws into front axle the rest houses the motor amd is no longer necessary. Then to take it out of 4x4 simply remove and spin the little shaft clockwise. You may be able to get some on it when it's still in the truck.
Well you don't need to remove it to take out of 4 wheel just put transfer case in 2 will the axle still turns but will not work as 4x4 until shift transfer case back to four high
That should not affect how the transmission shifts
If slips are you sure the transfer case is operating correctly
