Question about 1999 Chevrolet Silverado 1500

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My 93 z71 will not lock in 4 whell drive

I checked the fuze an plugend under the frount of the truck for the automatic lock in hubs dont now what it could be

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I had an '88 that did the same thing, and I just ended up bypassing all that **** and put a 4x4 Posi-Lok cable actuator in that Thermal Linear Actuator is a POS, that cable locks in every time correctly sand, mud, or snow, and she's seen her fair share of all.

Posted on Jul 01, 2009

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Without acctually testing all the wires we are only shooting in the dark ( lots of things )
1 bad wire
2 bad acctuator
3 bad 4x4 switch
need to test it all

Posted on Jul 01, 2009

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1 Answer

Front hub spline sticking out in my 93 bronco


Hello David Rowland,

Thanks for this question.

Back in the old days... Wow... This is upsetting...
(that was the extent of PLASTIC on the RUBICON)

There was a time when I knew these things... I helped a couple of buddies start a SUCESSFULL 4-wheel drive SHOP... but by the time Rubicon was becoming popular... I automatically knew
these things (the name) DANA SPICER was eluding me
but it is starting to come back. I did these things (4 wheel mechanic) because people that were dear to me liked it...
I enjoyed putting them together.

I have only been off rode a couple of times (in non-military equipment) and it was NEVER with fore thought... but always life & *****... Breaking'em...NOT MY cup of TEA.
(enough about this old guy).

ONE OF THE right people... on fixya is Juriy Hawrylak

I don't actually think anything is sticking out... I think the end cap from your HUB-LOCK is missing... and I thin if you are resourceful you can find the right manufacturer... and buy the part.

Just for visual assurances I'm going to put an eBay hub on the bottom of this article

Right fixya volunteer = Juriy Hawrylak

DANA 44 GM 10 BOLT WARN PREMIUM 4X4 LOCKING HUB 19 SPLINE FORD JEEP DODGE...

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24results for 4x4 93 bronco hub lock

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Snap On 1 2 Drive 4 Wheel Axle Lock Retaining Hub Nut Socket S8695C Dana...

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Nov 23, 2016 | 1993 Ford Bronco

1 Answer

My 1998 ford 4x4 wont engage in 4 whell drive the lights blink but no ingage


Does your vehicle have external locking hubs? If so, make sure they are turned to lock the wheels to the hubs.

Mar 13, 2015 | Ford Cars & Trucks

1 Answer

Everything in 4wd seems to work except the 4wd part :)


The locking front hubs are vacuum actuated. You need to inspect the vacuum supply to the hubs. I would provided a schematic of the system had you provide the vehicle year

Feb 25, 2010 | Mazda B4000 Cars & Trucks

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The 4-wheel drive option does not work. it is an


I have heard of people having problems with the locking hubs. I have never had that problem, but they are very easy to pull out and tke a look. Or could be you dont have the transfer case engaged properly or there is something wrong with it. Seems like the only problems there could be.

Jan 19, 2010 | 1993 Ford F150 SuperCab

1 Answer

When selecting 4 wheel drive my locking wheel hubs dont seem to be locking.I have drive to the wheels as the drive shafts can be seen turning when the vehicle is raised off the ground.Are the automatic...


The auto locking hubs are sort of a weak link. Many replace them with manual locking hubs, which last basically forever. Here is a set of instructions:
http://npora.ipbhost.com/index.php?showtopic=1405

Jan 11, 2010 | 1994 Nissan Pathfinder

1 Answer

Will not go into 4-whell drive. Floor shift seems to work OK but 4-whell light does not come on and it does not lock the hubs


You most likely have a defective part in the front differential. Typically, the transfer case is O.K Repair is not to costly.

Dec 11, 2009 | 1995 Chevrolet Suburban

2 Answers

Was driving onto a paved access road to beach. put switch in 4 hi about 40 yards from sand , increased speed to about 10 mph heard a sudden bang in front of truck. Truck came out of 4 wheel. 4 wheel lights...


Your automatic locking hubs are broken. Very common on ford trucks. The front hubs are geared with hard nylon gears, and are easily broken. If you replace your front hubs with "warn (name brand)" manual locking hubs, your issue will be resolved, and you won't have that issue again on your truck.

If you replace the hubs with manual locking hubs, you will have to stop, get out of the truck, and manually lock in your hubs every time you want to engage your 4 wheel drive. It beats getting stranded somewhere with no 4x4 at all; like you have now.

If you replace your hubs with the factory automatic locking hubs, the issue will return again in time.

May 26, 2009 | 2003 Ford F150 Regular Cab

1 Answer

1990 toyota 4runner 4x4 wont lock in front wheels


your drive shaft thats turning is mabe broke or your automatic 4x4 lockers could be bad

Feb 24, 2009 | 1990 Toyota 4Runner

1 Answer

4 wheel drive not engaging 1986 4 runner IFS


The self locking hubs (or automatic hubs) are actuated by vacuum. The vacuum line is usually on the driver's side of the differential, towards the front of the vehicle on Toys. You might want to check it out and see if it's cracked, broken, or gone.

Jan 05, 2009 | 1986 Toyota 4Runner

1 Answer

Jeep YJ 1991 4 wheel drive


if u got automatic front hubs stop put in park pull 4x4 shifter into 4 wheel
manual hubs at front wheels turn the hub locks to the lock position and then pull the 4 wheel shifter inti 4 wheel
also look over drivers sun visor if the tag aint worn off the direction are there... have fun 4 wheeling and keep the rubber side down
rank, rate & vote for my solution

Dec 20, 2008 | 1991 Jeep Wrangler

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