Power-lok help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**too much stuff** · 04-17-2010, 12:41 PM

Going to look at a 72 parts truck and it was originally a 3/4 ton big block truck. I do not know what rear end is in it, but it has power-lok listed on the glove box. What is the easiest way to verify it is a posi, and how much work is it to pull the posi unit only? I don't want to pull the whole rear if i don't have to. Thanks for any tips, Eric

cdowns · 04-17-2010, 01:50 PM

if posi why not take the whole rear?? that posi section wont fit in a 1/2 ton 12bolt rear

**too much stuff** · 04-17-2010, 02:21 PM

Quote:

Originally Posted by cdowns

if posi why not take the whole rear?? that posi section wont fit in a 1/2 ton 12bolt rear

I realize it is not the same as a 1/2 ton 12 bolt. Without pics i am not sure if it is a dana 60 or an ho52 or what it is for sure.
It is alot easier to store the center section than to try and move a whole rear end around.

**burb71** · 04-17-2010, 03:36 PM

I dont know if a 3/4 ton Power Lock works the same as 1/2 ton Posi
But if it does; lift the rear off of the ground " both wheels "
By hand roll one wheel, if the other wheel rolls in the same direction, its a Posi, a 1 leg unit rolls in opposite directions.
I'm with cdowns, take the whole unit.

**too much stuff** · 04-17-2010, 06:59 PM

If i take this apart, what am i looking for visually?

**special-K** · 04-17-2010, 07:06 PM

That`s a Dana60 3.54 rear.I`d take the whole thing.

**Joesjunk** · 04-17-2010, 11:00 PM

Yep, Power-lock is a Dana and No-spin is an Eaton (ho52)

Livrat · 04-17-2010, 11:35 PM

I agree with all above.. its a Dana 60 3:54 ratio.. (assuming its the one that came with it from the factory)..
I usually pull the fill plug on the rear cover and stick a finger in.. if finger goes in more than an inch its a non-posi... or jack it up and spin a wheel.. if the opposite side spins the same direction its a good bet it's posi..
Visually.......
Here is a pic..

**too much stuff** · 04-18-2010, 05:07 PM

Thanks for the help, looks to be a dana 60. Took a chance and bought the whole truck. Couldn't verify the posi part, but had enough other parts on it yet...

Duncan and son · 04-18-2010, 05:31 PM

Quote:

Originally Posted by Joesjunk

Yep, Power-lock is a Dana and No-spin is an Eaton (ho52)

Joe and Tim, I was reading your comments on the 3/4t rear end. Which is more desirable the Dana or Eaton? We have both and wanted to put one of them in our 72 longhorn. Anyones else's opinion is welcome.
Thanks Paul and Jason

**too much stuff** · 04-18-2010, 06:42 PM

I believe the dana 60 is easier/less expensive to buy parts for. I think the eaton may be stronger. I am sure you will get more input on this.

**too much stuff** · 04-19-2010, 10:44 PM

Ok, i took the advice givin and bought the whole rear end..... and the rest of the truck. 1972 3/4 ton gmc sierra. Looks like the original rear is still in it. Still has one tag that reads 461
3:54
and the remnants of another tag that probably read "use posi lube only" or what ever a dana tag would read.
I pulled the drain plug and also saw these numbers inside 72 A 22934X. Not sure what those mean. Thanks for the help, Eric

**burb71** · 04-20-2010, 12:09 PM

Sounds like it still has the original Power-Lock.
I think that ( 72 A ) is for, Jan 1972

04-17-2010, 12:41 PM	#1
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,715	Power-lok help Going to look at a 72 parts truck and it was originally a 3/4 ton big block truck. I do not know what rear end is in it, but it has power-lok listed on the glove box. What is the easiest way to verify it is a posi, and how much work is it to pull the posi unit only? I don't want to pull the whole rear if i don't have to. Thanks for any tips, Eric __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

04-17-2010, 01:50 PM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Power-lok help if posi why not take the whole rear?? that posi section wont fit in a 1/2 ton 12bolt rear __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

04-17-2010, 03:36 PM	#4
burb71 Active Member Join Date: Oct 2002 Location: Ft. Myers, Fl Posts: 1,716	Re: Power-lok help I dont know if a 3/4 ton Power Lock works the same as 1/2 ton Posi But if it does; lift the rear off of the ground " both wheels " By hand roll one wheel, if the other wheel rolls in the same direction, its a Posi, a 1 leg unit rolls in opposite directions. I'm with cdowns, take the whole unit.

04-17-2010, 06:59 PM	#5
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,715	Re: Power-lok help If i take this apart, what am i looking for visually? __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

04-17-2010, 07:06 PM	#6
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,861	Re: Power-lok help That`s a Dana60 3.54 rear.I`d take the whole thing. __________________ "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 ~

04-17-2010, 11:00 PM	#7
Joesjunk Senior Member Join Date: May 2001 Location: Independence MO. Posts: 7,691	Re: Power-lok help Yep, Power-lock is a Dana and No-spin is an Eaton (ho52) __________________ 72 3/4t Custom Deluxe 402/auto 66k Original paint 71 3/4t 4x4 Custom Deluxe 10k original miles Original paint 71 3/4t Cheyenne 402 70k original paint 72 3/4t 4x4 Custom deluxe 72 3/4t 4x4 Custom deluxe 91k original paint 72 Cheyenne/30 Dually 69 Camaro SS396 4-speed 13 GMC 2500HD Duramax I bought new 05 Jeep Wrangler "Willys Edition" 12k miles (I bought new) 85 3/4 ton 4x4 Scottsdale 33k miles original paint 86 1 ton 4x4 SRW Silverado 454 restored 80 1 ton 4x4 SRW Silverado 9,434 original miles!! original paint 95 GMC 1 ton dually 4x4 my dad bought new 95 GMC 3/4 ton 4x4, regular cab 454, 31k original miles 2002 2500HD 4x4 regular cab 6.0L 67k miles 2002 2500HD 4x4 regular cab 8.1L 28k miles 2003 GMC 2500HD 4x4 regular cab Diesel 93k miles 67-72 Parts for sale

04-17-2010, 11:35 PM	#8
Livrat Member #1049 Join Date: Jun 2000 Location: Troy Montana Posts: 3,940	Re: Power-lok help I agree with all above.. its a Dana 60 3:54 ratio.. (assuming its the one that came with it from the factory).. I usually pull the fill plug on the rear cover and stick a finger in.. if finger goes in more than an inch its a non-posi... or jack it up and spin a wheel.. if the opposite side spins the same direction its a good bet it's posi.. Visually....... Here is a pic.. Attached Images Last edited by Livrat; 04-17-2010 at 11:35 PM.

04-18-2010, 05:07 PM	#9
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,715	Re: Power-lok help Thanks for the help, looks to be a dana 60. Took a chance and bought the whole truck. Couldn't verify the posi part, but had enough other parts on it yet... __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

04-18-2010, 06:42 PM	#11
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,715	Re: Power-lok help I believe the dana 60 is easier/less expensive to buy parts for. I think the eaton may be stronger. I am sure you will get more input on this. __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

04-19-2010, 10:44 PM	#12
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,715	Re: Power-lok help Ok, i took the advice givin and bought the whole rear end..... and the rest of the truck. 1972 3/4 ton gmc sierra. Looks like the original rear is still in it. Still has one tag that reads 461 3:54 and the remnants of another tag that probably read "use posi lube only" or what ever a dana tag would read. I pulled the drain plug and also saw these numbers inside 72 A 22934X. Not sure what those mean. Thanks for the help, Eric __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

04-20-2010, 12:09 PM	#13
burb71 Active Member Join Date: Oct 2002 Location: Ft. Myers, Fl Posts: 1,716	Re: Power-lok help Sounds like it still has the original Power-Lock. I think that ( 72 A ) is for, Jan 1972



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