help 4wd problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cruzman8 · 01-24-2003, 09:13 AM

I got a 85 blazer s10 when u put it in 4wd the front driveshaft turns but the wheels don't turn.What engages them .Can anyone help ,please

Prerunner1982 · 01-24-2003, 02:38 PM

you should have automatic locking hubs, which could be shot....if you have manual hubs (which i doubt) they need to be locked..

85Silverado · 01-25-2003, 01:19 AM

Yeah...I agree with Prerunner....sounds like your hubs are shot....I think it was pretty rare for those trucks to come with locking hubs....my '92 I had had automatic locking hubs and almost every s-10/15 i've seen hasn't had manual hubs. But they could be out there.

chevy68388 · 01-25-2003, 01:59 AM

there is a vac line that locks them in if u open your hood ithere will be a box witha vac line that hooks to this box the out comes a cabel that runs down to your axle that what prolly broke i cant remember the name of the part but its held in with 3 8mmbolts eazy fix less than 5 min

cruzman8 · 01-26-2003, 08:44 PM

Thanks guys the vacuumn line was off DUH.works fine now

**swervin ervin** · 01-26-2003, 09:36 PM

Glad you figured it out.

I just noticed you are right up the road from me. Cool.

01-24-2003, 09:13 AM	#1
cruzman8 Registered User Join Date: Sep 2002 Location: Morganton,North Carolina Posts: 69	help 4wd problem I got a 85 blazer s10 when u put it in 4wd the front driveshaft turns but the wheels don't turn.What engages them .Can anyone help ,please __________________ Cruzman

01-24-2003, 02:38 PM	#2
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	you should have automatic locking hubs, which could be shot....if you have manual hubs (which i doubt) they need to be locked.. __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

01-25-2003, 01:19 AM	#3
85Silverado Registered User Join Date: Dec 2002 Location: Milwaukee, Wisconsin Posts: 198	Yeah...I agree with Prerunner....sounds like your hubs are shot....I think it was pretty rare for those trucks to come with locking hubs....my '92 I had had automatic locking hubs and almost every s-10/15 i've seen hasn't had manual hubs. But they could be out there. __________________ Paul D. '78 C20 Scottsdale 350ci 3 speed with granny gear 14 bolt rearend My trucks are "Car-Guy safe".......which pretty much means death trap in the hands of a normal civilian.

01-25-2003, 01:59 AM	#4
chevy68388 king $h!t Join Date: Jan 2002 Location: spring valley/ohio/usa Posts: 416	there is a vac line that locks them in if u open your hood ithere will be a box witha vac line that hooks to this box the out comes a cabel that runs down to your axle that what prolly broke i cant remember the name of the part but its held in with 3 8mmbolts eazy fix less than 5 min __________________ j dawg the 86 allmost done 357/700r4/lifted 9/dana44 front ten bolt rear/3.73 gears/35s

01-26-2003, 08:44 PM	#5
cruzman8 Registered User Join Date: Sep 2002 Location: Morganton,North Carolina Posts: 69	Thanks guys the vacuumn line was off DUH.works fine now __________________ Cruzman

01-26-2003, 09:36 PM	#6
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Glad you figured it out. I just noticed you are right up the road from me. Cool. __________________ Mike 1985 Chevy C-10

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