1963 Power Lok question

I have a CJ5, 1963, with a Model 44 rear differential and power lok. I am looking for clutches for it. Are these the standard 44 clutches or are these the early type that I have read about that are no longer available. Early ones are tapered (???) versus later are only slightly beveled?

 

There are two styles of clutches for the 44. One has a friction material and the other are steel with belleville springs (dished style). The steel clutches last much longer and are stronger so use those if you can find them. Either will work with your 44 Powerlock. Other than the clutch design differences they will interchange into any 44 Powerlock. It's the side gears that are different depending on spline count and the case and carrier bearings are different depending on gear ratios and spline count of axles originally used in the case. The cool thing about the Powerlock is you can mix and match the diff side gears to get the spline count you want. You can't do that with an open diff case....

 

Walcks4wd has them too....
http://www.walcks4wd.com/

 

Randy's has them.

http://www.ringpinion.com/ProductDetails.aspx?ProdID=5985

 

I have power-loks in the front dana 30 and rear dana 44 of my jeep and I want to replace the clutches in both. I have seen some people refer to series 1, 2, 3 and 4 power-loks. I can't seem to find any information on how to identify what I have in my jeep and if all of these versions use the same clutches or not and i have spent a ton of time surfing the net. It sounds like this they all use the same clutches regardless.

In looking at the link to Randy's R&P I'm wondering if the aggressive kit is the metal clutches and the smooth kit is the friction clutches that are being discussed. Is that correct?

Thanks

 

Yes, other than the differences noted above Dana 44's use the same clutches as other 44's, Dana 30's use the same clutches as other Dana 30's, etc.

The series of case refers to the gear ratio that will fit that case. There are generally two options, 3 series and 4 series. The flange the ring gear bolts to is in different locations depending upon the gear ratio series that will fit. This is necessary because as gear ratio changes the drive pinion gear diameter changes and there is only so much adjustability using shims.

Dana 44 3 series fits 2.54-1 down to 3.73-1 ring and pinion.
Dana 44 4 series fits 3.92-1 down to 5.38-1 ring and pinion.

Dana 30 3 series fits 2.54-1 down to 3.54-1 ring and pinion
Dana 30 4 series fits 3.73-1 down to 5.38-1 ring and pinion

As the gear ratio gets lower (numerically higher) the drive pinion gear diameter gets smaller (fewer teeth) so the ring gear must be closer to the centerline of the drive pinion
As the gear ratio gets higher (numerically lower) the drive pinion gets larger (more teeth) so the ring gear must be moved away from the centerline of the drive pinion.

Find out the ring and pinion ratio of your differential assembly's and then you can figure out what series case you have/need.

Be aware, for some differentials in the aftermarket there are what are called "thick ring gear sets" with a thicker ring gear than stock that allow you to put a 4 series ratio on a 3 series case. You can't go the other way though and these are only available through the aftermarket and for certain diffs and certain ratios.

 

Thanks nickmil.

My gears are 3.73 and since the clutch kits fit a series 3 or 4 power-lok carriers I should be good to go.

I can't tell you how much I surfed the net trying to answer this question to find out what I needed to order.

Thanks again - I really appreciate your help.

 

So I purchased my clutch kit for my power lok and now I'm tying to figure out the proper order for the clutches. I bought the aggressive kit and I have 10 (5 for each side) pieces that I hope I can describe accurately and need to know the order to place them in my carrier.

I have:
2 with inside teeth and no outside tabs that are convex
2 with inside teeth and no outside tabs that are flat
4 without teeth and with tabs that are flat
2 without teeth and with that are convex

I also need to know which way the convex ones face.
{ center of diff }
or
} center of diff {

Thanks for your help and I hope someone can help me.

Nickmil - you seem to know quite a bit about these diffs - any recommendations.

Thanks

 

Taken from http://www.vernco.com/powr-lok/

 

Thanks for the diagram. That helps a lot, but it isn't showing me where the other convex disk with gears and no tabs goes and which way it faces.

Does anybody know where that other disk goes on the aggressive kit?

 

my understand is the only difference is the amount of clutches, not the material.


If you drive your jeep AT all on the road, avoid the 'race' powr-lok. I have one in my '66 and while it does very well off road, it's road manners are very, very bad. The rear tries to pass the front at the drop of a hat on slick roads.

 

I purchased the aggressive kit for my dana 44 but the problem is I don't know the order of the clutches. It came with a convex disk (internally splined) and a convex plate (with tabs) and everything I have seen only shows where to place the convex plate (with tabs) and not the disk (internally splined). Even the diagram in this thread doesn't cover where to place them. Has anybody here installed the aggressive clutch kit and know where they go?

 

According to this document:

http://www2.dana.com/pdf/5315-3.pdf

Figure 13 shows



In their terminology, a "plate" has tabs, and a "disc" has splines.

Hope this helps.

Eric

 

That totally helps - Thanks Eric and everybody else who helped me along the way with this. The jeep community never ceases to amaze me.

Thanks again.

 

If you want it even more aggressive put the flat plates between the two dished plates (belleville springs). This will preload it even more. If not, then stack them like shown in the diagram.