'89 Chevy K2500 - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 05-03-2007, 11:00 PM
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'89 Chevy K2500

I wanted to know if anyone knew about a supposed sensor in the transfer case that controls the 4X4 Switch. I replaced the actuator in the front differential and my truck went into 4 wheel drive a couple of times, but now it will not do it at all. It sounds like it wants to, but the actuator will not engage. I checked for power at the actuator and it is dead. Someone said the transfer case might be low on fluid. Just wondering if anyone has ever had this problem before. Thanks in advance for the help.
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post #2 of (permalink) Old 05-04-2007, 06:48 PM
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Yes there is, you will have to feel for it in the top of the t-case. Its just a small sensor, and if you can see the wiring, one of the leads will be brown. Its just a small check ball sensor too, not much to it. I used to have the GM part number for the dang thing memorized, but not anymore... Here is the part at Advance Auto Parts

Transfer Case Check Switch

The GP Sorenson/Standard part number is TCA4. Bout 50 bux there, you may find it cheaper at your local parts house. Check with a Napa store or Carquest, and the GP/Standard parts are usually cheaper there. Good luck!

This post would probably fare better in the IFS Chevy Forum

Last edited by Krayzie; 05-04-2007 at 06:51 PM.
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