Jaymes Maciejewski;1573677; said:When I put my truck in 4 hi it makes a clunking noise when I touch the accelerator. I was wondering if anyone else has had this problem. Was it the Transfer case chain slipping or the front differential not engaging.
I've been the steady maintenance guy on our GM fleet since '95. Never an actuator failure. Had the harness melt on a non-fleet '95. All of them are on their way to my invisible 200k mile mark for fleet service removal or they've already been past 200k and sold.dhg;1591881; said:i'm still trying to figure out why GM continues to use these types of actuators(mech/electrical thermal linear or vaccum). good luck
Any progress on this. Mine does the EXACT same thing. I'll be fixing it when I get both time and money.bcserl;1591205; said:Mine is doing that. Feels like it is jumping a tooth in the transfer case. Does it in lo and high. The steering wheel will jerk to the right when it does it. It is intermittent and usually does it once every 15 seconds or so. I am taking it in tomorrow.
Man! Talk about good service! I would definitely be spreadin' the word in your area about those guys. One good turn deserves another.bcserl;1748537; said:It turned out to be the eletric motor/actuator that extends and retracts to put the front axle into four wheel drive was acting up. Dealer never found it, blamed my arb air locker. Drivetrain Direct in Corona, CA the ones that did my arb air locker figured it out and fixed it for free.
Unplug it, spin it out and plug it in and let it hang. Cycle 4wd now. It should extend in 4x4 and retract in 2wd. Also, with it out, depress the plunger in the hole where the actuator was and it should depress, engaging the 4wd. You may have to spin one tire slightly to allow engagement.01Phd;1754789; said:I think the actuator he is talking about is the one on the front axle. Because mine is a manual shift and does the exact same thing. If this is correct how do you remove the actuator to replace it. Also does anyone know if there is a way to test the one in there.