1990 4x4 trouble

[ZackGuerette]

I have a 1990 1500 with a 350 and what I'm pretty sure is a 700r4. When I got to engage it into 4x4 I have the move the lever from 2hi to 4hi and back multiple times as well as go threw the gears on the column multiple times for it to engage. And do the same thing to get it back into 2x4

 

[great white]

How do you know?

Is it by watching the light display on the shifter?

If yes, it's likely your tla on the front axle. They go bad over time. If it's the original one from 1990 it's long overdue to fail. When they get old they are slow to engage or they often don't at all.

If it's just the front axle light you're watching not come on, that just indicates if your front axle is locked in. You're in 4Hi, you just don't have an engaged front axle...

 

[SCOTTYINWV]

What he said.

And if the thermal actuator is bad, swap to a newer electric one. Instant 4x4

 

[ZackGuerette]

What's tla and What's it do

 

[IOWNJUNK]

What's tla and What's it do

Thermal Linear Actuator. Its on your front axle, its what engages/disengages front axle.

 

[MYT HI]

Here's a pic, the outside ones are the regular ones and the one in the middle is a electric one.

You must be registered for see images attach

 

[IOWNJUNK]

If you find that to be the problem you can swap for the electric, the junkyard is your friend here.


Edit: I see scottyinwv already mentioned that.

 

[great white]

Electric how to with part numbers:

http://www.getdieselpower.com/cars/actuator_upgrade/GM_TRUCK_4X4_ACTUATOR_UPGRADE.html

 

[SCOTTYINWV]

Here's a pic, the outside ones are the regular ones and the one in the middle is a electric one.

You must be registered for see images attach

I've seen this pic before

 

[MYT HI]

I've seen this pic before

Uhhhhhh...


Yeah I'm the one who posted it on facebook