4x4 not working - The 1947 - Present Chevrolet & GMC Truck Message Board Network

doublearrow · 02-28-2015, 09:07 AM

I have a 1987 silverado 1/2 ton 4x4 and put it in 4x4 this morning due to icy snowy conditions. I made a couple of turns and it didnt feel like i was in 4 hi. Then i got ready to go up a dip to cross the train tracks and the back tires would do nothing but sping. No effort from.the front tires. I even put it kn 4 low and saw no results. Its a stock transfer case as far as i know, but i dont even know where to start on 4x4. The shifter goes into position fine and i even felt a little grind when i wasnt paying attention and didnt have it in nuetral while putting it in 4 lo. Anyone have an idea on where i need to start and look for? Thanks

**special-K** · 02-28-2015, 09:57 AM

Automatic or manual hubs? If manual, are you sure they are all the way rotated to "lock"? if automatic, time for manuals. Jack up the front and see what turns and what doesn't (by hand w/ truck not running) with 4wd engaged and let us know

72MARIO · 02-28-2015, 10:17 AM

I had the manual hub in my suburban not emgage. I could see the u joint at the spindle spinning in drive but the wheel was not turning. A new set of mile marker hubs 10 minutes later it was working

doublearrow · 02-28-2015, 02:39 PM

Thanks guys. Automatic hubs, it maybe a couple of days but will jack up the front end. Thanks

Redcap · 03-02-2015, 12:39 AM

Quote:

Originally Posted by doublearrow

Thanks guys. Automatic hubs, it maybe a couple of days but will jack up the front end. Thanks

Auto hubs are very failure-prone.

02-28-2015, 09:07 AM	#1
doublearrow Registered User Join Date: Jan 2010 Location: Midland Texas Posts: 51	4x4 not working I have a 1987 silverado 1/2 ton 4x4 and put it in 4x4 this morning due to icy snowy conditions. I made a couple of turns and it didnt feel like i was in 4 hi. Then i got ready to go up a dip to cross the train tracks and the back tires would do nothing but sping. No effort from.the front tires. I even put it kn 4 low and saw no results. Its a stock transfer case as far as i know, but i dont even know where to start on 4x4. The shifter goes into position fine and i even felt a little grind when i wasnt paying attention and didnt have it in nuetral while putting it in 4 lo. Anyone have an idea on where i need to start and look for? Thanks

02-28-2015, 09:57 AM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: 4x4 not working Automatic or manual hubs? If manual, are you sure they are all the way rotated to "lock"? if automatic, time for manuals. Jack up the front and see what turns and what doesn't (by hand w/ truck not running) with 4wd engaged and let us know __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

02-28-2015, 10:17 AM	#3
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,052	Re: 4x4 not working I had the manual hub in my suburban not emgage. I could see the u joint at the spindle spinning in drive but the wheel was not turning. A new set of mile marker hubs 10 minutes later it was working __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

02-28-2015, 02:39 PM	#4
doublearrow Registered User Join Date: Jan 2010 Location: Midland Texas Posts: 51	Re: 4x4 not working Thanks guys. Automatic hubs, it maybe a couple of days but will jack up the front end. Thanks



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