POWR LOK Install - The 1947 - Present Chevrolet & GMC Truck Message Board Network

breeh · 03-22-2010, 02:47 PM

Do any of you differential gurus know if it is possible to open a D-60 pull the open carrier out, swap the ring gear to a POWR LOK, and then install the POWR LOK without having to setup the ring and pinion again?

Thanks!

**kwmech** · 03-22-2010, 03:38 PM

The pinion depth will not have to be changed, you will however have to set up the backlash.

Burt4x4 · 03-22-2010, 05:31 PM

The diff bearings are pressed onto the carrier and the shims are inbetween the bearing & carrier so...no. Even if you pulled the bearings and used the same shims that would only get the alignment close but most likely not right.

LONGHAIR · 03-22-2010, 07:23 PM

As long as you are willing to "work with it"....it can be done.
First you need to measure the backlash before you take it apart. It absolutely has to go back to that same measurement, even if it is slightly out of spec from natural wear. You cannot "tighen it up" or it will fail. A magnet mounted dial indicator is the way to go with this.

Burt4x4 is correct, the shims are under the bearings, so if you measure it first and are willing to press the bearings off and on a few times.....yes. It is probably a good idea to get a few extra shims before you start, you may need more than the original had.

Also take the extra precaution to use a good synthetic gear lube when you put it back together. It's cheap insurance.

breeh · 03-23-2010, 02:32 AM

Gentlemen, thanks for the info. Very helpful!

andyh1956 · 03-24-2010, 12:04 AM

this is how i do danas. for each series of axles i have a set of bearings that have been "honed out". that way i can set up the axle just like i want & then remove setup bearings & press the "run" bearings on with the shim pack right on. to pull the side bearings off no matter how carefull you are your going to get on the cages some & that can destroy the bearing. the dana serv books have a rather complcated install procedure that "estmates" what the initial set up shim pack to run shim pack will be, but it never worked out to my satisfaction so i do it the trial & error way. you also need to spread the case some when removing / installing as the "crush" on the case is what sets the preload on the side bearings. not trying to scare you but want to see you get it right the 1st time so it will run & dont give problems. you will luv a powerlock. another thing: some power locks have lefthand threads on the case bolts so if you disissemble it for re clutch or whatever be carefull. good luck!
andy

03-22-2010, 02:47 PM	#1
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	POWR LOK Install Do any of you differential gurus know if it is possible to open a D-60 pull the open carrier out, swap the ring gear to a POWR LOK, and then install the POWR LOK without having to setup the ring and pinion again? Thanks! __________________ 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"

03-22-2010, 03:38 PM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,678	Re: POWR LOK Install The pinion depth will not have to be changed, you will however have to set up the backlash.

03-22-2010, 05:31 PM	#3
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: POWR LOK Install The diff bearings are pressed onto the carrier and the shims are inbetween the bearing & carrier so...no. Even if you pulled the bearings and used the same shims that would only get the alignment close but most likely not right. __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

03-23-2010, 02:32 AM	#5
breeh Recovering 67-72 Addict Join Date: Oct 2000 Location: North Bend, WA Posts: 1,788	Re: POWR LOK Install Gentlemen, thanks for the info. Very helpful! __________________ 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"

03-24-2010, 12:04 AM	#6
andyh1956 Registered User Join Date: Mar 2010 Location: thomastown mississippi Posts: 1,261	Re: POWR LOK Install this is how i do danas. for each series of axles i have a set of bearings that have been "honed out". that way i can set up the axle just like i want & then remove setup bearings & press the "run" bearings on with the shim pack right on. to pull the side bearings off no matter how carefull you are your going to get on the cages some & that can destroy the bearing. the dana serv books have a rather complcated install procedure that "estmates" what the initial set up shim pack to run shim pack will be, but it never worked out to my satisfaction so i do it the trial & error way. you also need to spread the case some when removing / installing as the "crush" on the case is what sets the preload on the side bearings. not trying to scare you but want to see you get it right the 1st time so it will run & dont give problems. you will luv a powerlock. another thing: some power locks have lefthand threads on the case bolts so if you disissemble it for re clutch or whatever be carefull. good luck! andy



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