4x4 Help For A Newbie

[joe_b]

I have an 88 2500 4X4 with a 5 speed and the floor 4X4 shifter. i can get it into 4 wheel, and the reducer for 4 low works but the front wheels dont engage. i have seen a few places on here that the 4 wheel drive actuator is usually the problem but i have not seen any with the same symptoms i have. Should i start with the actuator? THANKS

[2COR517]

You've got the same basic problem as this guy. His truck uses a push button shift rather than a floor lever.

 

http://www.gm-trucks.com/forums/index.php?...=101742&hl=

 

You can do the same basic diagnosis.

[joe_b]

You've got the same basic problem as this guy. His truck uses a push button shift rather than a floor lever.

 

http://www.gm-trucks.com/forums/index.php?...=101742&hl=

 

You can do the same basic diagnosis.

 

that guy has a 96, would that be the same as my 88?

[VRSCA1]

I have an 88 2500 4X4 with a 5 speed and the floor 4X4 shifter. i can get it into 4 wheel, and the reducer for 4 low works but the front wheels dont engage. i have seen a few places on here that the 4 wheel drive actuator is usually the problem but i have not seen any with the same symptoms i have. Should i start with the actuator? THANKS

 

By all means covert it to the newer style actuator that is available,I had a 1994 with the same issue,converted it to the newer type actuator kit comes with a new actuator and harness,I believe there was GM TSB to addrerss this concern.

[VRSCA1]

I have an 88 2500 4X4 with a 5 speed and the floor 4X4 shifter. i can get it into 4 wheel, and the reducer for 4 low works but the front wheels dont engage. i have seen a few places on here that the 4 wheel drive actuator is usually the problem but i have not seen any with the same symptoms i have. Should i start with the actuator? THANKS

 

By all means covert it to the newer style actuator that is available,I had a 1994 with the same issue,converted it to the newer type actuator kit comes with a new actuator and harness,I believe there was GM TSB to addrerss this concern.

 

 

Here is what you need there is a post if you look down.

 

<H2 align=left>88-UP C/K ACTUATOR UPGRADE</H2>

VEHICLE SERVICED: 1994 CHEVROLET FULL SIZE BLAZER (2 DOOR)

 

 

 

PURPOSE: IMPROVE AXLE CONNECT ENGAGEMENT TIME AND

 

COMPONENT RELIABILITY.

 

 

 

SYMTOMS: NO FRONT DRIVE AXLE ENGAEMENT WHEN SHIFTED

 

INTO 4X4.

 

 

 

Obtain the following GM part numbers:

 

(1) 26060073 Actuator

 

(1) 88959465 Harness/Spacer Kit

 

 

 

 

 

 

 

 

[2COR517]

If you want ultimate reliability, simplicity, and 2Lo, install the PosiLock.

 

http://www.4x4posi-lok.com/app_chevy-k.html

 

It's like manual hubs, but you don't have to get out of the truck.

[joe_b]

so if i go with the stock actuator, it just screws in and clips on the other end... the newer version also screws in but i need a new wiring harness, and posi lok is a whole different ball game and is more expensive.

 

what is the advantage on the newer version?

[joe_b]

Okay, so i replaced the actuator and still no luck... the drive shaft now spins when its engaged so i think the actuator may have been part of it, but the wheels still dont go.

any other ideas?

[2COR517]

Did you do the diagnosis in the link I posted?

[joe_b]

Did you do the diagnosis in the link I posted?

 

yes, and the actuator only moved a little.. not as much as the one on my grandpa's truck so i thought that was it.. and im sure it needed replacing anyway but there is some other problem too.