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Hoods69BadBowTie · 02-23-2011, 12:18 AM

Yep there is the actuator in the front diff that can go bad. There is also a cheaper part on the transfer case that can go bad. Its a little sensor/ actuator that is magnetic I believe and it sits on the top of the transfer case. Has a 2 prong that goes into. This was bad on my '88 and the diff actuator was still good. I think I got the part at oreilys and it was like 10$ or 15$. Hope this helps.

02-23-2011, 12:18 AM	#14
Hoods69BadBowTie Chevys Kick A$$ Join Date: Jan 2005 Location: Zootown, MT Posts: 12,699	Re: 90 Checy 4x4 not working Yep there is the actuator in the front diff that can go bad. There is also a cheaper part on the transfer case that can go bad. Its a little sensor/ actuator that is magnetic I believe and it sits on the top of the transfer case. Has a 2 prong that goes into. This was bad on my '88 and the diff actuator was still good. I think I got the part at oreilys and it was like 10$ or 15$. Hope this helps. __________________ HOODS is what I answer too -'79, '77, '88 Pickup Sold, '85 Camaro, '83 T/A, '81,'83,'90 K5 Blazer All Sold -'79 3/4 ton "Big Yellow Bananna" Lifted 4spd. 39.5 TSL Swampers, The money Pit -'86 K5 Blazer Silverado 6.2 4" lift 35"s -'95 Ext. Cab Shorty 4" Tuff Country rolling 35" M/T's -'83 Monte Carlo T-Tops. 126,500 Original Miles -LATER I would rather push a Chevy then drive a ford!!