71 3/4 without Lockouts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**breeh** · 01-08-2009, 01:33 AM

I recently purchased a 71 3/4 4x4 as a parts truck. A tree had fallen on the bed and pretty much destroyed the bed. The frame looks tweaked as well. Anyway, the truck does not have locking hubs. I assumed that the front axle must have been swapped at some time for a later model fulltime 4x4 unit even though the owner who had owned the truck for 20+ years claimed that it was the original axle.

I recently read somewhere on the board that this was a way that these trucks could be outfitted originally. Does anybody know if it is possible that a 71 4x4 could come from the factory without the locking hubs?

**HOTFUN** · 01-08-2009, 02:04 AM

Hi Breeh

The full time hubs have always been standard and the lockout hubs were an option from 1959 to 72. I'm not sure when they changed but it might have been 73. If I remember right the lockout hubs were about a $75 option and are always listed on the SPID label for the 66 to 72's. Mark

**special-K** · 01-08-2009, 06:39 AM

You got slugs?

Like Mark said,that`s standard equipment and lockouts were an option.It`s like alot of options everyone gets making the standard equipment the exception(like a/c or automatic trans).Plus,pretty much all the ones that didn`t order lockouts originally installed them somewhere along the line by now.
It means all the driveline parts were turned by the wheels when in 2wd.More drag and wear.

OLDCHEV4X4 · 01-08-2009, 11:16 AM

But......alot stronger out on the trail! And no L/O hub to get knocked off by a rock, or a stump, or another truck. :-)

**breeh** · 01-08-2009, 12:35 PM

Always fun to learn something new! Thanks for the info gentlemen!

**jerry moss** · 01-12-2009, 10:33 AM

personally i've never seen a K/10 - K/20 without locking hubs but since they are listed on the SPID i asssumed they were an optional item.

Down south truckin · 01-16-2009, 12:57 AM

Here's a couple pictures of some 73 model non locking hubs. Am I correct in assuming that they are locked one hundred percent all the time?

**special-K** · 01-16-2009, 10:09 AM

Yes.You have the wheels turning the drivetrain up to through to the Transfer case output.As mentioned,it`s the strongest deal and no problems with staying lubed.

01-08-2009, 01:33 AM	#1
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	71 3/4 without Lockouts I recently purchased a 71 3/4 4x4 as a parts truck. A tree had fallen on the bed and pretty much destroyed the bed. The frame looks tweaked as well. Anyway, the truck does not have locking hubs. I assumed that the front axle must have been swapped at some time for a later model fulltime 4x4 unit even though the owner who had owned the truck for 20+ years claimed that it was the original axle. I recently read somewhere on the board that this was a way that these trucks could be outfitted originally. Does anybody know if it is possible that a 71 4x4 could come from the factory without the locking hubs? __________________ 68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women"

01-08-2009, 02:04 AM	#2
HOTFUN Senior Member Join Date: Jan 2001 Location: Lincoln, Nebraska Posts: 2,142	Re: 71 3/4 without Lockouts Hi Breeh The full time hubs have always been standard and the lockout hubs were an option from 1959 to 72. I'm not sure when they changed but it might have been 73. If I remember right the lockout hubs were about a $75 option and are always listed on the SPID label for the 66 to 72's. Mark __________________ '66 CST BBW swb fleet 327 fac ac '67 CST 4x4 swb 327 stepside project '72 Cheyenne K20 50k original '72 Cheyenne Super K20 project '73 Sierra swb 4x4 frame off in paint stage '74 Cheyenne Super swb w/16k actual '71 & 72 Cheyenne K10 4x4 swb's '70 426 HEMICUDA conv SHAKER 4 sp Dana 60 '60 Impala conv 327 PG fac ac loaded 3rd owner '72 GMC K2500 4x4 '59 Apache CST BBW fleetside swb 283 '73 ElCamino SS LS1 T56 true SS bucket tach '76 ElCamino SS 52k survivor '87 Grand National 41k True 2nd to last built in 1987. '86 K30 454 SRW fleetside CA since new '88 Trans Am GTA 39k bought new 2018 DEMON plum crazy @ 840HP! "Need for speed" Last edited by HOTFUN; 01-08-2009 at 02:05 AM.

01-08-2009, 06:39 AM	#3
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: 71 3/4 without Lockouts You got slugs? Like Mark said,that`s standard equipment and lockouts were an option.It`s like alot of options everyone gets making the standard equipment the exception(like a/c or automatic trans).Plus,pretty much all the ones that didn`t order lockouts originally installed them somewhere along the line by now. It means all the driveline parts were turned by the wheels when in 2wd.More drag and wear. __________________ "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 ~

01-08-2009, 11:16 AM	#4
OLDCHEV4X4 Registered User Join Date: Apr 2000 Location: Chester County PA, USA Posts: 1,228	Re: 71 3/4 without Lockouts But......alot stronger out on the trail! And no L/O hub to get knocked off by a rock, or a stump, or another truck. :-) __________________ 72 k/10 short wideside 72 k/5 Blazer 72 K/5 Blazer - obstacle course racer 72 custom/10 8' bed 70 K/5 Blazer 67 C-30 GMC Flat bed 86 GMC K2500 Plow Truck 85 GMC K3500 84 M1008 85 M1008 77 G30 Motor Home 72 Sears 12hp Tractor Glenmoore, Pennsylvania

01-08-2009, 12:35 PM	#5
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	Re: 71 3/4 without Lockouts Always fun to learn something new! Thanks for the info gentlemen! __________________ 68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women"

01-12-2009, 10:33 AM	#6
jerry moss Born Psycho Join Date: Feb 2001 Location: brentwood,cal,usa Posts: 4,802	Re: 71 3/4 without Lockouts personally i've never seen a K/10 - K/20 without locking hubs but since they are listed on the SPID i asssumed they were an optional item. __________________ jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA

01-16-2009, 12:57 AM	#7
Down south truckin Senior Member Join Date: Feb 2006 Location: Lilburn Georgia Posts: 1,240	Re: 71 3/4 without Lockouts Here's a couple pictures of some 73 model non locking hubs. Am I correct in assuming that they are locked one hundred percent all the time? Attached Images

01-16-2009, 10:09 AM	#8
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,862	Re: 71 3/4 without Lockouts Yes.You have the wheels turning the drivetrain up to through to the Transfer case output.As mentioned,it`s the strongest deal and no problems with staying lubed. __________________ "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 ~



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