Question about 1987 GMC Suburban

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Transfer case broken

I need to identify the model number for the 4x4 transfer case for my 87 GMC suburban 2500 w/ a 350.

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There is a round tag on transfer case. probably in the back of case (faces rearward on truck). It'll say something like np-205 or np-208.

Posted on Jul 19, 2010

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I have a 4x4 1999 gmc suburban 1500 with a 5.7 motor and an automatic transmission. when my suburban is in 2 hi, i can sometimes put it into reverse and it will not move but make a grinding noise. then i...


unfortunately what it sounds like is the transfer case like you suspect. inside are bearings and gears and a chain what happens is the chain will stretch and cause this problem it will actually jump the teeth on the gears, you will need to have the chain replaced in the transfer case. sorry to have to tell you this but i hope it helps.

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I have a 97gmc suburban and when you push the 4x4 button it just blinks


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