I want to spin both tires - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Benelli · 02-01-2010, 11:43 PM

I have a few hundred dollars saved up.

What is the cheapest route in order to give my 79 K10 a posi or locker? I'd like to keep the same gear ratio I have right now.

onlyifihadachevy · 02-02-2010, 12:45 AM

weld it.

Spool.

Benelli · 02-02-2010, 12:48 AM

I was hoping to avoid that.

onlyifihadachevy · 02-02-2010, 01:00 AM

There are Detroit, ox, airlock. Many different types the most widely used would be detroit style. The will come in the carrier type you need.

You will need to know what the axle's ratio is to order the correct one. I would have a shop install it, unless you want to read up on how to install them.

You need a special tool from what I know to set the shims right for the pinion and ring gears.

Benelli · 02-02-2010, 01:02 AM

I have a Auto class in high school tha I'll be doing this in, the teacher has been a mechanic for the past 30 years or so. I think he should help me get it right.

So if I know the axle type and the gear ratio, then I should be fine?

bikes&bowties · 02-02-2010, 01:09 AM

it would probably be much much cheaper to just find a complete rear end. 14FF with a posi out of a junkyard

Benelli · 02-02-2010, 01:18 AM

How would i know if the 14 bolt would have a posi unit intact?

Also wouldn't it be a 8 lug?

bikes&bowties · 02-02-2010, 01:43 AM

Forgot you had 6 lugs. And pull the cover off and look. You could get a 10 or 12 bolt for real cheap. Just gotta hunt around for the right gears w/ posi

GASoline71 · 02-02-2010, 01:51 AM

The only way to do it cheap is to weld it. Other than that... like bikes&bowties said... you gotta find a donor rear end with a posi already in it. However... if it does have a posi unit in it... the seller is prolly gonna want more for it than an open diff. You could also find a used limited slip (posi) out of a truck on ebay or CL.

You need to save up a little more cash...

Gary

Benelli · 02-02-2010, 01:52 AM

Do I just bring a half inch socket with me and pull off the cover to the other axle to check if it has a posi? The gear ratio should be stamped into the teeth somewhere, shouldn't it?

GASoline71 · 02-02-2010, 01:55 AM

Jack up the rear end so both tires are off the ground. If you spin one tire, and the other tire spins opposite... it has an open diff. If you spin one tire and they both spin the same way... it has a limited slip (posi) unit in it.

Gary

Benelli · 02-02-2010, 01:55 AM

Ah, thanks. Over-thought that one.

I guess I'll get out the piggy bank and put in a few extra hours. Thanks guys.

MTCK · 02-02-2010, 02:18 AM

If you don't have a posi already, the fastest, easiest, cheapest way to lock up is with a 'lunchbox locker.' These replace the spider gears and side gears and you do not have to remove the carrier. Because of that you don't have to setup your ring and pinion again. You also don't have to worry about swapping a rear and still just having a gov-lock (GM factory posi) and who knows what kind of shape bearings, brakes etc. Some examples are a Powertrax lockrite or no-spin. I'm not sure who else makes one. The no-spin is supposed to be a little bit tougher I think.

Good luck.

LONGHAIR · 02-02-2010, 07:11 AM

Yeah, what he said^^^^^^ Forget all that "welding" stuff. That's crazy talk.

Benelli · 02-02-2010, 09:40 PM

Can you link me to these "lunchbox lockers" I've never even heard of them before. They sound like what I'm looking for. I've always heard that you could put a 6" lift and 35" tires and the locker would make more difference than the lift and tires.

I welded a corp. 10 bolt on our race car, that lasted 2 races before it exploded, now it sits in a pasture rotting away.

MTCK · 02-02-2010, 09:53 PM

Try these links:

http://www.summitracing.com/parts/PWT-1910-LR/

http://www.summitracing.com/parts/PWT-92-0788-3005/

I believe richmond gear owns powertrax so their web site might have more info about installation and applications, etc. I attached the links for 12 bolts as I assumed you were looking for one for your rear axle.

Benelli · 02-02-2010, 10:05 PM

Sweet. Thanks a ton!

LANDC · 02-08-2010, 12:56 PM

If you like your truck and plan on keeping it you will be better off finding a 14 bolt and building it up. If you want to lay rubber, a 14 bolt will take way more punishment.

shilo · 02-08-2010, 09:29 PM

you can find a semi float 6 lug 14 bolt and install a lock-rite locker. Or just put the lock-rite in your 12 bolt, but be easy on it. 10 and 12 bolts belong in a sewing machine, not a truck.

msgross · 02-09-2010, 10:37 AM

Quote:

Originally Posted by shilo

you can find a semi float 6 lug 14 bolt and install a lock-rite locker. Or just put the lock-rite in your 12 bolt, but be easy on it. 10 and 12 bolts belong in a sewing machine, not a truck.

looks like I better learn to sew...

70duramax · 02-09-2010, 03:54 PM

i used an aburn pro series locker in my 12bolt to replace the factory posi , it held up pretty good to my 70 chev with a 388 stroker. that was about ten years ago and the price i think was around 350 new. might be more now though

yellow70GMC · 02-09-2010, 04:07 PM

unless you have tires bigger than 35", don't listen to what people say about the 12 bolt being "weak"

70duramax · 02-09-2010, 04:39 PM

x2 yellow, 12bolts are fine. shilo, you act like he has 9000hp and 52in tires. not to mention hes on a budget and asked how to make what he has work,

shilo · 02-09-2010, 09:44 PM

It was a joke...c'mon guys relax.

On a budget, a 6 lug semifloat 14 bolt should be considered. It is remarkably stronger than a 12 bolt and could save money down the road.

I highly recomend the lockrite. they are great cheap units. ive used a 4 of them (in differant apps) and only broke one once. It really didnt even break the locker, just sheared off all four pins inside it.

And it sounds like his 360 is not stock, ive seen enough 10 and 12 bolts grenading with 33's burning out on pavement. I wasnt trying to be a richard cranium, just offering advise after what ive seen and done.

**amcgeh01** · 02-10-2010, 03:08 PM

[QUOTE=shilo;3790991]It was a joke...c'mon guys relax.

On a budget, a 6 lug semifloat 14 bolt should be considered. It is remarkably stronger than a 12 bolt and could save money down the road.

Hi Shilo,

Just for my own clarification.. When you say Semi-float - what exactly does that mean..? I have heard folks tell me to go get a 14 bolt because if one side breaks, you can still limp home on one wheel (scary thought) vs. a 12 bolt where you would be stuck.. I am not sure what float or no float means in that context..? I have a 12 bolt now but not really 4x4 wheeling it but then again if I go out somewhere the last thing I want to happen is something like that..

In addition, what models of trucks carry the Semi-float axles so I can begin my local junkyard search... I definitely want to keep my six lugs because of my old school slot mags and these sound much safer...

02-01-2010, 11:43 PM	#1
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	I want to spin both tires I have a few hundred dollars saved up. What is the cheapest route in order to give my 79 K10 a posi or locker? I'd like to keep the same gear ratio I have right now. __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold

02-02-2010, 12:45 AM	#2
onlyifihadachevy Registered User Join Date: Mar 2009 Location: seaside,ca Posts: 778	Re: I want to spin both tires weld it. Spool. __________________ 72 gmc 2500 2wd drive convert My 72 thread http://67-72chevytrucks.com/vboard/s...d.php?t=346712 THe other truck, wheeler 69 1/2 4x4, yellow and rusty. http://67-72chevytrucks.com/vboard/s...d.php?t=350300

02-02-2010, 12:48 AM	#3
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	Re: I want to spin both tires I was hoping to avoid that. __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold

02-02-2010, 01:00 AM	#4
onlyifihadachevy Registered User Join Date: Mar 2009 Location: seaside,ca Posts: 778	Re: I want to spin both tires There are Detroit, ox, airlock. Many different types the most widely used would be detroit style. The will come in the carrier type you need. You will need to know what the axle's ratio is to order the correct one. I would have a shop install it, unless you want to read up on how to install them. You need a special tool from what I know to set the shims right for the pinion and ring gears. __________________ 72 gmc 2500 2wd drive convert My 72 thread http://67-72chevytrucks.com/vboard/s...d.php?t=346712 THe other truck, wheeler 69 1/2 4x4, yellow and rusty. http://67-72chevytrucks.com/vboard/s...d.php?t=350300

02-02-2010, 01:02 AM	#5
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	Re: I want to spin both tires I have a Auto class in high school tha I'll be doing this in, the teacher has been a mechanic for the past 30 years or so. I think he should help me get it right. So if I know the axle type and the gear ratio, then I should be fine? __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold

02-02-2010, 01:09 AM	#6
bikes&bowties Registered User Join Date: May 2009 Location: Washington Posts: 663	Re: I want to spin both tires it would probably be much much cheaper to just find a complete rear end. 14FF with a posi out of a junkyard

02-02-2010, 01:18 AM	#7
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	Re: I want to spin both tires How would i know if the 14 bolt would have a posi unit intact? Also wouldn't it be a 8 lug? __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold

02-02-2010, 01:43 AM	#8
bikes&bowties Registered User Join Date: May 2009 Location: Washington Posts: 663	Re: I want to spin both tires Forgot you had 6 lugs. And pull the cover off and look. You could get a 10 or 12 bolt for real cheap. Just gotta hunt around for the right gears w/ posi

02-02-2010, 01:51 AM	#9
GASoline71 "I ain't nobody, dork." Join Date: Sep 2007 Location: Whidbey Island, Washington Posts: 8,971	Re: I want to spin both tires The only way to do it cheap is to weld it. Other than that... like bikes&bowties said... you gotta find a donor rear end with a posi already in it. However... if it does have a posi unit in it... the seller is prolly gonna want more for it than an open diff. You could also find a used limited slip (posi) out of a truck on ebay or CL. You need to save up a little more cash... Gary Last edited by GASoline71; 02-02-2010 at 01:52 AM.

02-02-2010, 01:52 AM	#10
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	Re: I want to spin both tires Do I just bring a half inch socket with me and pull off the cover to the other axle to check if it has a posi? The gear ratio should be stamped into the teeth somewhere, shouldn't it? __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold

02-02-2010, 01:55 AM	#11
GASoline71 "I ain't nobody, dork." Join Date: Sep 2007 Location: Whidbey Island, Washington Posts: 8,971	Re: I want to spin both tires Jack up the rear end so both tires are off the ground. If you spin one tire, and the other tire spins opposite... it has an open diff. If you spin one tire and they both spin the same way... it has a limited slip (posi) unit in it. Gary

02-02-2010, 01:55 AM	#12
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	Re: I want to spin both tires Ah, thanks. Over-thought that one. I guess I'll get out the piggy bank and put in a few extra hours. Thanks guys. __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold

02-02-2010, 02:18 AM	#13
MTCK Registered User Join Date: Dec 2009 Location: Fairbanks, AK Posts: 1,830	Re: I want to spin both tires If you don't have a posi already, the fastest, easiest, cheapest way to lock up is with a 'lunchbox locker.' These replace the spider gears and side gears and you do not have to remove the carrier. Because of that you don't have to setup your ring and pinion again. You also don't have to worry about swapping a rear and still just having a gov-lock (GM factory posi) and who knows what kind of shape bearings, brakes etc. Some examples are a Powertrax lockrite or no-spin. I'm not sure who else makes one. The no-spin is supposed to be a little bit tougher I think. Good luck. __________________ -Marcus 1991 V3500 L29 454 4L80E NP205 D60/14 Bolt 4.56's 1984 K30 292 TH400 NP205 D60/14 Bolt 4.56's flat bed 7'6" Meyer Plow 2022 Silverado 3500 L8T Project Daily Driver Project Heavy Hauler Project Plow Truck

02-02-2010, 09:40 PM	#15
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	Re: I want to spin both tires Can you link me to these "lunchbox lockers" I've never even heard of them before. They sound like what I'm looking for. I've always heard that you could put a 6" lift and 35" tires and the locker would make more difference than the lift and tires. I welded a corp. 10 bolt on our race car, that lasted 2 races before it exploded, now it sits in a pasture rotting away. __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold

02-02-2010, 09:53 PM	#16
MTCK Registered User Join Date: Dec 2009 Location: Fairbanks, AK Posts: 1,830	Re: I want to spin both tires Try these links: http://www.summitracing.com/parts/PWT-1910-LR/ http://www.summitracing.com/parts/PWT-92-0788-3005/ I believe richmond gear owns powertrax so their web site might have more info about installation and applications, etc. I attached the links for 12 bolts as I assumed you were looking for one for your rear axle. __________________ -Marcus 1991 V3500 L29 454 4L80E NP205 D60/14 Bolt 4.56's 1984 K30 292 TH400 NP205 D60/14 Bolt 4.56's flat bed 7'6" Meyer Plow 2022 Silverado 3500 L8T Project Daily Driver Project Heavy Hauler Project Plow Truck



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02-02-2010, 10:05 PM	#17
Benelli Watchin the rust grow Join Date: Oct 2008 Location: Western Nebraska Posts: 950	Re: I want to spin both tires Sweet. Thanks a ton! __________________ 1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done 2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold

02-08-2010, 12:56 PM	#18
LANDC Registered User Join Date: Oct 2008 Location: Kelowna, BC, Canada Posts: 93	Re: I want to spin both tires If you like your truck and plan on keeping it you will be better off finding a 14 bolt and building it up. If you want to lay rubber, a 14 bolt will take way more punishment. __________________ Custom Vehicle, Custom Problems.

02-08-2010, 09:29 PM	#19
shilo Registered User Join Date: Jun 2005 Location: Grand Junction , CO Posts: 602	Re: I want to spin both tires you can find a semi float 6 lug 14 bolt and install a lock-rite locker. Or just put the lock-rite in your 12 bolt, but be easy on it. 10 and 12 bolts belong in a sewing machine, not a truck. __________________ 71 swb 4x4, 37" Iroks, t400/205 496 77 CJ-7, Narrowed Dana 60 Lockrite, 14 Bolt Spool, 4.56 gears, 39.5" boggers. 360 t-18/d20

02-09-2010, 03:54 PM	#21
70duramax Registered User Join Date: Dec 2008 Location: morrisdale pa Posts: 46	Re: I want to spin both tires i used an aburn pro series locker in my 12bolt to replace the factory posi , it held up pretty good to my 70 chev with a 388 stroker. that was about ten years ago and the price i think was around 350 new. might be more now though

02-09-2010, 04:07 PM	#22
yellow70GMC Registered User Join Date: Sep 2005 Location: Reno, NV Posts: 161	Re: I want to spin both tires unless you have tires bigger than 35", don't listen to what people say about the 12 bolt being "weak" __________________ 1970 GMC 4x4 swb fleetside custom 4 inch lift with rear shackle flip, mild sbc, tci trans, rebuilt np205 w/twin shifters

02-09-2010, 04:39 PM	#23
70duramax Registered User Join Date: Dec 2008 Location: morrisdale pa Posts: 46	Re: I want to spin both tires x2 yellow, 12bolts are fine. shilo, you act like he has 9000hp and 52in tires. not to mention hes on a budget and asked how to make what he has work, Last edited by 70duramax; 02-09-2010 at 04:40 PM. Reason: typo

02-09-2010, 09:44 PM	#24
shilo Registered User Join Date: Jun 2005 Location: Grand Junction , CO Posts: 602	Re: I want to spin both tires It was a joke...c'mon guys relax. On a budget, a 6 lug semifloat 14 bolt should be considered. It is remarkably stronger than a 12 bolt and could save money down the road. I highly recomend the lockrite. they are great cheap units. ive used a 4 of them (in differant apps) and only broke one once. It really didnt even break the locker, just sheared off all four pins inside it. And it sounds like his 360 is not stock, ive seen enough 10 and 12 bolts grenading with 33's burning out on pavement. I wasnt trying to be a richard cranium, just offering advise after what ive seen and done. __________________ 71 swb 4x4, 37" Iroks, t400/205 496 77 CJ-7, Narrowed Dana 60 Lockrite, 14 Bolt Spool, 4.56 gears, 39.5" boggers. 360 t-18/d20

02-10-2010, 03:08 PM	#25
amcgeh01 Senior Member Join Date: Jul 2009 Location: SoCal Posts: 208	Re: I want to spin both tires [QUOTE=shilo;3790991]It was a joke...c'mon guys relax. On a budget, a 6 lug semifloat 14 bolt should be considered. It is remarkably stronger than a 12 bolt and could save money down the road. Hi Shilo, Just for my own clarification.. When you say Semi-float - what exactly does that mean..? I have heard folks tell me to go get a 14 bolt because if one side breaks, you can still limp home on one wheel (scary thought) vs. a 12 bolt where you would be stuck.. I am not sure what float or no float means in that context..? I have a 12 bolt now but not really 4x4 wheeling it but then again if I go out somewhere the last thing I want to happen is something like that.. In addition, what models of trucks carry the Semi-float axles so I can begin my local junkyard search... I definitely want to keep my six lugs because of my old school slot mags and these sound much safer... __________________ ******************************************** In-work on my 5.3L/4L65E/NP208 case conversion into a 1972 GMC JImmy 4x4... Not as simple as it looks folks..

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