79 Automatic Locking hubs??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

79Chevytruck · 10-18-2003, 10:11 PM

hi i have a 79 chevy 4X4 automatic locking hubs and we just swaped them out with manule locking hubs. but the frunt drive shaft spins in hi. butt when i put it in Hi Lock its dose not spin even with the hubs free. when its in Hi and the front hubs are free
the front drive shafe spins and the truck will not move. It will move in Hi Lock with the hubs free.

Thanks For you help Andrew Panther

fanman · 10-19-2003, 09:12 AM

My truck has lockouts in the front, and the truck won't move unelss the t-case is in one of the loc positions with them unlocked. If I put it in 4hi or 4low then the front drive shaft will only spin. This is because the t-cases differential is sending all the power to the easisest path. Basicly to use two wheel drive, you need to put the t-case in a loc position. Also you should get the Mile Marker conversion kit, it turns the 203 into a part-time transfer case.

**JIMs70GMC** · 10-19-2003, 10:17 AM

Sounds like the conversion to the Transfer case needs to be done. When you say "automatic" hubs it was really just a drive flange that locked the hub to the axle shaft. Just putting manual hubs on wont work you have to install a kit to stop the differential in the transfer case from sending all the power to the front driveshaft when the hubs are unlocked and tc in 4hi. In 4hi lock you are esentially locking the TC differential. What fanman said.

79Chevytruck · 10-19-2003, 01:19 PM

so i might be better off geting a diferant TC??

fanman · 10-19-2003, 03:27 PM

Quote:

Originally posted by 79Chevytruck
so i might be better off geting a diferant TC??

No, just the conversion kit. It turns the TC into a part-time unit. It would be cheaper/easier to get the conversion kit. Rather than swaping in a differn't TC.

stan79chevy · 10-19-2003, 04:56 PM

my transfer case is the same way. wit the conversion will i get 2hi 2lo n 4hi 4lo? its only about 50 bucks what does it come with?

my main reason for wanting it is that i want to be able to lock my hubs in and still have 2 wheel drive then get stuck and just shift into 4wd without having to get out in the mud and lock the hubs in. like you can do with a 205. is that what the conversion does?

**JIMs70GMC** · 10-20-2003, 04:28 AM

yep, it basically "welds" the spider gears in the differential that's in the tc.

10-18-2003, 10:11 PM	#1
79Chevytruck Registered User Join Date: Oct 2003 Posts: 2	79 Automatic Locking hubs??? hi i have a 79 chevy 4X4 automatic locking hubs and we just swaped them out with manule locking hubs. but the frunt drive shaft spins in hi. butt when i put it in Hi Lock its dose not spin even with the hubs free. when its in Hi and the front hubs are free the front drive shafe spins and the truck will not move. It will move in Hi Lock with the hubs free. Thanks For you help Andrew Panther Last edited by 79Chevytruck; 10-18-2003 at 10:17 PM.

10-19-2003, 09:12 AM	#2
fanman Registered User Join Date: Aug 2002 Location: Auburn, MI Posts: 156	My truck has lockouts in the front, and the truck won't move unelss the t-case is in one of the loc positions with them unlocked. If I put it in 4hi or 4low then the front drive shaft will only spin. This is because the t-cases differential is sending all the power to the easisest path. Basicly to use two wheel drive, you need to put the t-case in a loc position. Also you should get the Mile Marker conversion kit, it turns the 203 into a part-time transfer case. __________________ "When I start my car in the morning I want the neighbors to think the world is comming to an end." Homer Simpson I'm not stuck, I've still got some gas left"

10-19-2003, 10:17 AM	#3
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Sounds like the conversion to the Transfer case needs to be done. When you say "automatic" hubs it was really just a drive flange that locked the hub to the axle shaft. Just putting manual hubs on wont work you have to install a kit to stop the differential in the transfer case from sending all the power to the front driveshaft when the hubs are unlocked and tc in 4hi. In 4hi lock you are esentially locking the TC differential. What fanman said. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

10-19-2003, 04:56 PM	#6
stan79chevy Registered User Join Date: Sep 2003 Location: COVINGTON GEORGIA Posts: 477	what exactly does the conversion do? my transfer case is the same way. wit the conversion will i get 2hi 2lo n 4hi 4lo? its only about 50 bucks what does it come with? my main reason for wanting it is that i want to be able to lock my hubs in and still have 2 wheel drive then get stuck and just shift into 4wd without having to get out in the mud and lock the hubs in. like you can do with a 205. is that what the conversion does? __________________ 79 chevy k20 350/350/205/D44/14bFF 4.56 gears rock LWB pimer black 01 S-10 ZR2 extended cab 4.3/4L60E/233 3.73 gear 31" DICK CEPEK CRUSHERS

10-20-2003, 04:28 AM	#7
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	yep, it basically "welds" the spider gears in the differential that's in the tc. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

10-19-2003, 01:19 PM	#4
79Chevytruck Registered User Join Date: Oct 2003 Posts: 2	so i might be better off geting a diferant TC??



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.