1994 Chevy Silverado

LARRYCATFISH

MEMBER
1994 CHEVROLET SILVERADO

Transmission problem
1994 Chevy Silverado V8 Four Wheel Drive Automatic

I can try to lock my 4wheel drive in and fills like it goes in but the light don't come on in the floor and the front wheels don't spin when I get in the mud I have checked the all the wires and all look good please help

4 Replies

JACOBANDNICKOLAS

MECHANIC
108,192 POSTS

Do you have an electric shift or on the floor 4wd shifter?

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Saturday, September 18th, 2010 AT 11:51 PM

DWB812

MECHANIC
108 POSTS

It is likely that your interlock in the front differential has failed. If it's the factory original, it's a heat operated device that takes a few seconds to engage (at least) when you throw the lever into 4WD. I recommend one of the "instant on" replacement interlocks that have no delay. Installation is pretty easy except for tight access. Cut wire ties to free wires and electrical connector, unbolt old one, unplug and remove; bolt in new one, plug in and tie wrap up wires neatly so they don't catch any snarly stuff on the trail and you should be back in business. Good luck and I hope this helps.