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post #1 of (permalink) Old 08-23-2001, 06:25 PM
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4X4 Won\'t Lock In

I have a 97 GMC 2500 pickup. Can anyone help me figure out why my front axle won't engage into four wheel drive. My transfer case is turning the drive but dooesn't get the front axle to lock in.

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post #2 of (permalink) Old 08-23-2001, 06:37 PM
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Re: 4X4 Won\'t Lock In

Possibly the electric actuator that locks the hubs.
I know that my '94 had a recall for it, but I don't know if it affected any other years.

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post #3 of (permalink) Old 08-23-2001, 06:43 PM
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Re: 4X4 Won\'t Lock In

actuall, its a thermal actuator. well thats origional equiptment. when mine fails...which I"m sure it will eventually, I"m going to get the "posi-lok" out of summit....or maybe it was jeg's. no matter. its a 100% mechanical solution to the failing thermal/electrical actuators. and it allows you to operate in 2WD low-range. sometimes handy.

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post #4 of (permalink) Old 08-23-2001, 09:16 PM
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Re: 4X4 Won\'t Lock In

Yes it sounds like possibly the actuator. Try Summit or JC Whitney. You'll find a mechanical device that will end that problem. Do a search for "actuator". This subject has been covered many times so you should be able to find some details on this.

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post #5 of (permalink) Old 08-24-2001, 12:17 AM
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Re: 4X4 Won\'t Lock In

you can also go with the factory electrical actuator, as opposed to your old thermal type. They started showing up in about 98 and maybe sooner on button selcted T-cases. Anyway, your local dealership service center can give you details.

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post #6 of (permalink) Old 08-24-2001, 06:50 AM
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Re: 4X4 Won\'t Lock In

I changed to a vacumm actuator from Warn. Works well even in cold weather.

If it don't fit force it, and if all else fails get a bigger hammer!
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