How does transfer case work on GMC Jimmy 4WD?

For 4Lo the transfer case has an encoder motor that is on the transfer case that engages a lower gear when you stop, put trans in neutral and push 4 lo and a clunk is heard. Again a sensor on the transfer case to tell TCCM it is engaged. Hope that wasn’t too confusing.

Is there a problem with my GMC Jimmy 4WD?

If you have 4 button Autotrac the transfer cases sometimes have clutch problems and use special blue syn fluid to smooth out. The Bang comes going back to 2WD. When going into 4WD, you hear the clicking of the relays and feel it shift and hear a low whine/rumble. 4LO seems to be working as advertised.

Where is the actuator on a GMC Jimmy 4WD?

1. Check the vac hoses from the untake over to the reservior and T off to the actuator under the battery tray. 2. Chack the actuator (crawl under the pass side front) by looking /listening to see it the cable pulls the axle coupler. 3.

Where is the rear sensor on a GMC Jimmy?

The rear sensor is in the transfer case. The passenger side front axle has a coupler that engages the axle to the front differential when any 4wd mode is activated and a sensor tells the TCCM computer in the cab located in the pass side kick panel its engaged.

What kind of transfer case does a GMC Jimmy use?

GMC Jimmy, Suburban and Yukon and the 1500, 2500, 3500, Sierra and Full Size Van The NP243 Transfer Case is commonly found in late 90s GMC and Chevrolet SUVs. Chevy used a NP241C and the GMC a NP243C transfer case. That is New Process, also known as New Venture.

Why does my GMC Jimmy not go into gear?

MY JIMMY WILL GO INTO GEAR WHEN I FIRST START IT UP, BUT WHEN IT WARMS UP I GOT NOTHING. SO COULD IT BE THE TRANSFER CASE OR THE TRANS. ANY HELP WOULD BE THANKFUL.

When did General Motors start using transfer cases?

Usage: The NP243 was installed in General Motors vehicles starting in 1996, used in both 1500 and 2500 series pickup trucks, suburban, Tahoe and Yukon’s. These transfer cases are part time four wheel drive electric shift.

What kind of transfer case does a Chevy Blazer use?

The NP208 transfer case is similar to the NP203 and NP205 cases, sharing a number of applications between them, though on the 208 the casing is made out of aluminum rather than iron. Usage: Chevy Blazer, Suburban, and Tahoe from 1981-1988. Chevy pickups and vans from 1981-1987. GMC Jimmy, Suburban and Yukon and Full Size pickups 1981-1988.