1979 ford 4x4

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Apr 10, 2004 | 09:36 PM

kenbear1981

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1979 ford 4x4

Can anyone help me. I'm trying to figure out why my rear brakes lock up when I put my truck in fourwheel drive.

Apr 10, 2004 | 10:55 PM

LxMan1

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From: Louisville,Ky.

Hi and welcome to the forum.

Do they lock up as soon as you shift into 4x4? If so, I would think that you may have a transfer case problem and not a brake problem

Apr 11, 2004 | 09:20 AM

Djoffroad

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From: Rancho Cordova, CA USA

Could it be binding from a gear mismatch?

Apr 11, 2004 | 01:27 PM

ivanribic

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From: Spokane, WA

Quote:

Originally Posted by Djoffroad

Could it be binding from a gear mismatch?

My first thought too. Also double check that your tires are all the same diameter.

Apr 11, 2004 | 08:05 PM

kenbear1981

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I just bought the truck a month ago and put a new engine. I know that the gears in the rear end were just changed by the guy that I bought it from. Do the front and rear gears have to be the same ratio. I don't think it's the transfer case, because if I leave the hubs unlocked and shift to 4x4 the front drive shaft turns with no problem.

Last edited by kenbear1981; Apr 11, 2004 at 08:07 PM.

Apr 11, 2004 | 08:51 PM

LxMan1

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From: Louisville,Ky.

Yes, they must match. If not, one driveshaft tries to turn faster than the other and binds up the transfer case.

Apr 11, 2004 | 10:14 PM

Mil1ion

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They can also be one fraction different.
ie:4.11 rear <> 4.10 front.

4.10 Rear <> 4.09 front

Ford designed it so one axle was always dragging or pulling... I forget which