Power locks and nospins
 

Our gmc trucks only came with 2 types of traction aids the d44 and d 60 used a power lock and the eaton in the one ton used a no spin. The 30 spline power locks also came in international and dodge trucks until 72. Look at all of these and you may find one. I find these all of the time. The little sputnik thing is a no spin. This is a true locker and was installed from chevy in 3/4 ton and one ton trucks until 72. The 60-66 trucks have a sticker on the glove box, and the 67-72 have it listed on the build sheet in the glove box. The no spin replaces the spiders in the carrier.

Re: Power locks and nospins
 

mine is 28 spline, i need planetaries for it!!!!!! or a whole new powerlok!

Re: Power locks and nospins
 

Count it again. the d44 came in 10-19-30 spline count.

Re: Power locks and nospins
 

post a picture of the rear. I think you have a little eaton.

Re: Power locks and nospins
 

I am looking at the carrier pictured on the 67-72 forum. it looks like a drop out carrier. Eaton, or 8.8 or 9 inch.

Re: Power locks and nospins
 

OK I have been looking through my notes on odd powerlocks. volvos and jags, and wierd euro ford trucks. nothing fits. however mid 60's buicks. with the 425 and a 9.3 rear fits the bill. Post a pic of the rear. include a shot of the brake drums please. Barry

Re: Power locks and nospins
 

Barry, mine is a 1965 K1500 (GVW 8100 lbs) with the std D 60 and was a 4.56:1 now a 3.70:1 but still an open diff. Any chance you might have a posi unit (or even locker) in the area of 3.70 or lesser number / higher ratio? If you want you can contact me via direce email: jim@james-associates.com when you have a moment. Thanks, JIm Hyde Phx AZ.

Re: Power locks and nospins
 

my rear is the same as the one on the left in the above picture, counted 5 times, 28 spline.

Re: Power locks and nospins
 

The rear that you posted in the 67-72 forum is not a dana 44. The picture with the ring and pinion is some sort of drop out third member rear. Dana 44 should look like this. yours is the other pic. Spicer made powelocks for a lot of other rears. We just need to know what.

Re: Power locks and nospins
 

here are some pictures of a 1962 gmc d44 coil spring rear with 3.07 gears and a powerlock

Re: Power locks and nospins
 

Has anyone had an experience wherein a "too high" ration was installed into a rear end? I'm just wondering what would be an ideal ratio (Power Lock) for a K1500 4 spd (compound low) that would allow highway crusing without "buzzing" the 305 yet still be low enough for medium to light towing. Any suggestions?? Jim Hyde, Phx AZ

Re: Power locks and nospins
 

Here is the internals of the D60

Re: Power locks and nospins
 

Hey jim You went from 4.56 to 3.73. Personally I would have gone with 3.54. But 3.73 will be fine. You wont really notice to much of a difference. The pics are your powerlock.

Re: Power locks and nospins
 

yep thats mine!!!!! cast d44 on the housing

Re: Power locks and nospins
 

same internals in mine with the interlocking planetary shafts! any planetaries laying around???

Re: Power locks and nospins
 

The powerlock carrier looks the same but the picture you posted is not a d44 rear end. Post a picture of the whole rear end . Dana sold power locks to other manufacturers. I have seen 17-19-21-27-28-29-31 spline counts with different diameters of axle shafts. Some are cone clutches and some are disk. None of these parts are available new. But they can be found if we know what rear it is. The picture earlier in the thread shows your ring and pinion next to a d 44.

Re: Power locks and nospins
 

Post # 9 and 10 show your carrier next to a d44 and post 10 shows a d44 with the cover off. Not the same as yours.

Re: Power locks and nospins
 

i'll try and get some more pictures to you of the carrier and housing and axles, thanks for the continued help. picture number 10 looks the same as my carrier unless i'm missing some slight difference. the exploded drawing is identical to the parts in mine.

Re: Power locks and nospins
 

Barry, the pkg arrived here just this afternoon. Will try to get to the front end and do a spline count and advise. Jim

Re: Power locks and nospins
 

Hay does anybody know what kind of posi-traction unit will fit the Timken rear-end in my '66 GMC with #10,000 weight capacity and a '12 flat bed??? Ross.Hodges Durham,NC.

Re: Power locks and nospins
 

Two questions first, is your truck a2500 series? Second does your truck have 8 bolt wheels and a round differential cover? If you answer yes to these then you can put a Detroit locker in. There are two ways to do this. First way is to find an original locker for your rear. Second way is to buy a new 14 bolt locker and use newer axles. I have done this both ways. It's really easy. Finally your truck should have an eaton rear if it's what I think it is. Pm me and I can walk you through it. Barry

Re: Power locks and nospins
 

I was looking through my stuff today and found an original no spin informational packet that came with our trucks that had the no spin option. Thought I would share it with you. Sorry the rest will come later. Gotta Go. Barry.

Re: Power locks and nospins
 

I got an email this weekend to update you guys on Barry's boy's trip so here it is. Not my words. Don't shoot the messenger!


I guess he still reads the boards from time to time and he saw Culver's question about the kids. I won't post any more of Barry's emails because I understand the problems it can cause, but I thought everyone might want to hear about his son's trip. The boy didn't do anything so I hope that's alright. It was a good story. Caught fish and a girl, how bout that? Lucky dog!


If this isn't OK Jeannie just delete it. No harm I'm not taking any sides.

Re: Power locks and nospins
 

Since this thread started with a power lock differential subject, I will ask a question about them. I removed the differential cover to see how much gunk had accumulated back there, I was surprised to see really clean 90 weight and no gunk to speak of. I saw a tag on one of the cover bolts, I was hoping it was the gear ratio, but no, it said to use power lock lubricate in this unit. Seems this truck has that rear end. Now in my maintenance manual it says to add some power lock lubricant. Well my Valvoline 90 wt. says it is for limited slip applications, is this good enough or should I go buy some of the additive stuff they sell??

Re: Power locks and nospins
 

I've always heard about just putting 90wt in and rarely do I hear about any problems. I'm putting Redline 57904 75W90 GL-5 Gear Oil in Cecilia this summer when I do her pumpkins because it came recommended for older trucks by Jay Leno and his lead mechanic. Something about less friction and easier on the seals.

Re: Power locks and nospins
 

I just got told that a power lock needs a friction modifier in the oil so you'll need to add one if you go with regular 90wt. If it says "ok for power locks" or "ok for limited slips" then it already has it inside so no sweat! :thumbsup:

Re: Power locks and nospins
 

I found a bit more information too. On a thread on another forum, related to 4 wheel drives with a Spicer 44 posi lock pumpkin. They recommended going with the 90 wt with the additive for a limited slip plus adding a product called Equa-Torque, which is a friction modifier, made by Sta-Lube. Seems that works really good.