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Unread 04-04-2013, 07:05 PM   #1
jco6560
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Dana 44 factory limited slip

My apologies if this has been asked before...Is there any way to identify a factory limited slip on a D44 from a 70 CJ5? Does and 'S' after the gear ratio indicate this? Or can it be tracked from the serial number? Based on the wheel spin test with the rear jacked up, it has a limited slip of some type, but wanted some evidence if its Jeep original (Powr Loc, TracLoc or whatever it was called then) or more likely aftermarket.

thanks

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Unread 04-04-2013, 10:49 PM   #2
jp360cj
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Best way to tell is to pull the cover. Post a pic on here if you're not sure and someone will help you ID it.
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Unread 04-05-2013, 09:37 AM   #3
BlueRubiconrich
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A powerloc has a two piece case ,a trac loc has a once piece case.
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Unread 04-05-2013, 03:34 PM   #4
NExOBLIVISCARIS
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i always thought i had an open diff in my renegade cause there was nothing there to show it was a limited slip but when we took it out after it exploded on me...clutch packs everywhere. if you have the trac lock it is very difficult to tell. do you think you have one?
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Unread 04-05-2013, 04:23 PM   #5
foggybottombob
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A trac-lok clutch set is only good for about 50K miles. They wear out pretty fast. They really are not a very good limited slip choice for a Jeep. I have seen lots of torn up trac-loks in junkyard trucks.
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Unread 04-05-2013, 09:50 PM   #6
jco6560
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Quote:
Originally Posted by NExOBLIVISCARIS View Post
i always thought i had an open diff in my renegade cause there was nothing there to show it was a limited slip but when we took it out after it exploded on me...clutch packs everywhere. if you have the trac lock it is very difficult to tell. do you think you have one?
Both rear wheels spin when up on stands - so some sort of limited slip is happening. Not saying it actually functions to a high degree. I was trying to avoid removing the cover to see, but that may be the best way to go and get a picture. Someone will probably know what it is.

NExOBLIVISCARIS - how do you like the Auburn limited slip?

I was looking to upgrade the differential but seems like not many options for D44 with trac-loc carrier. I am expecting I can put in an upgrade myself if I don't have to do too much resetting the pinon gear (backlash and all the proper spacing and tolerances?). Working on diffs is pretty new to me, but some options seemed doable and some seemed less so.

thanks
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Unread 04-06-2013, 07:10 AM   #7
lucdog
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I would ditch the trac lock, and put in a Detroit tru-trac.

Bill
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Unread 04-07-2013, 08:41 AM   #8
NExOBLIVISCARIS
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Quote:
Originally Posted by jco6560 View Post
Both rear wheels spin when up on stands - so some sort of limited slip is happening. Not saying it actually functions to a high degree. I was trying to avoid removing the cover to see, but that may be the best way to go and get a picture. Someone will probably know what it is.

NExOBLIVISCARIS - how do you like the Auburn limited slip?

I was looking to upgrade the differential but seems like not many options for D44 with trac-loc carrier. I am expecting I can put in an upgrade myself if I don't have to do too much resetting the pinon gear (backlash and all the proper spacing and tolerances?). Working on diffs is pretty new to me, but some options seemed doable and some seemed less so.

thanks
Welp I haven't finish putting it in. Dana 44 has pros and cons to putting it in. Between me with work and my buddy having college and putting a Ford 302 he and his father built in a 1970 merc 280c. And having to order a part every now and then its taking a while. Just waiting on a carrier bearing to come in due to gumming up the case with a puller. But after that I just have to shim the side lash and back lash then we are done... then I will post on how it is
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Unread 04-09-2013, 02:20 PM   #9
jco6560
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Does anyone know when Jeep swtich from PowerLock to Trac-Loc? What would have been factory option in 1970?
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Unread 04-09-2013, 06:13 PM   #10
chromegrille
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depends on what rear axle you got from the factory...
somewhere in 1970 is the serial number break for the 2 piece D44 tapered axle and the 1 piece D44 flanged axle
tapered axles have 19 splines = powerloc
flanged axles have 30 splines = trac lock
in a nutshell..........
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Unread 04-09-2013, 06:39 PM   #11
jeepdaddy2000
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Quote:
Originally Posted by jco6560 View Post
Does anyone know when Jeep swtich from PowerLock to Trac-Loc? What would have been factory option in 1970?
Both diffs were a factory option.
The trac lok is a hand grenade disguised as a diff. I wouldn't use one for a boat anchor.
The Powr Lok is an excellent unit.
there are also a number of other traction units available.
The switch from 19 to 30 splines was in 70 and is easy to recognize.
Tapered axles use 19
Flanged axles used 30
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Unread 04-09-2013, 09:10 PM   #12
jco6560
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Thanks, I am learning a lot (both about D44 axles in general and specifically what what is under the 1970 CJ). Its got a flanged D44 which is nice b/c of the one piece shaft, but that means the limited slip is the undesireable trac-lock (assuming its factory and not something aftermarket). Correct?

Unfortunately, from what I understand, the trac-lock carrier actually makes this more of a hassle to upgrade than just an open diff? Any suggestions on a good limited slip (Auburn, Truetrac, or retrofitting a Power-Loc?). Or is it not really going to matter since I will probably have to remove the carrier anyway? No way I can afford an ARB and keeping it very modest in terms of modification. Daily driver with just above stock capability off-road (4.88 gears and 31 or 32s).
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Unread 04-09-2013, 10:22 PM   #13
jeepdaddy2000
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Tru trac or Powr Lok. Either will require installing carrier bearings and re-adjusting the back lash.
Powr lok's were available in both 19 and 30 splines. They are rebuildable and are very strong.
http://www.ebay.com/itm/DANA-44-POWE...7a3fda&vxp=mtr
Insure you get the right carrier. There is a break depending on your gear ratio.
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Unread 04-11-2013, 10:14 AM   #14
NExOBLIVISCARIS
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track lok was also a standard part on the renegade 1's fyi. i had track lok and i sheared the carrier in half
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Unread 04-11-2013, 01:12 PM   #15
duffer
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Quote:
Originally Posted by jeepdaddy2000 View Post
Tru trac or Powr Lok. Either will require installing carrier bearings and re-adjusting the back lash.
Powr lok's were available in both 19 and 30 splines. They are rebuildable and are very strong.
http://www.ebay.com/itm/DANA-44-POWE...7a3fda&vxp=mtr
Insure you get the right carrier. There is a break depending on your gear ratio.
2x PowrLoc one of the best limited slips ever and easy to up the bias.
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