No 4wd

[Ltutt1]

I hope I’m in the right place I’m new to this,I’ve got a 1988 gmc v1500 surburban with 4wd and a 350 in it
The 4wd doesn’t work you can shift it into any 4wd mode light comes on all the parts are there,I’ve been told about the actuator on the front axle but there’s not one not even a place for one,when I bought it the lady I bought from said they had taken a gear out any help is greatly appreciated

 

[Nad_Yvalhosert]

That would be a square body? The actuators are manual hubs.
In between the lug nuts...

Take the truck back to the lady and have her put 'em back in. She sold you an incomplete truck. She owes you!

 

[Schurkey]

Yup. Whole different vehicle than a GMT400. Prehistoric front axle.

 

[69project]

Yup. Whole different vehicle than a GMT400. Prehistoric front axle.

Maybe prehistoric but a lot more rugged and durable than the IFS in the GMT 400's.

 

[Schurkey]

It's all yours. You can have my share.

 

[DonYukon]

Maybe prehistoric but a lot more rugged and durable than the IFS in the GMT 400's.

Depends. the 1500 SA axles in those years i believe were 10 bolts. Not the most stout axle for the size of vehicle

 

[618 Syndicate]

The gear they took out is probably in the front diff...

 

[Ryno3]

Most of the burbs that year had auto lock hubs, if the hubs aren’t locking they could just be dry and sticking. We used to take them out and soak them in ATF for a few hours and you were usually good to go

 

[Gearhead1]

I had problems with automatic hubs on my 1985 Suburban not locking up, so I replaced them with a manual lock set from a 1970's pickup.