Blaine Posted February 9, 2014 Share Posted February 9, 2014 I looked at my front diff cover and it appears to be a dana 44. SWEET!. i can never remember which is which, when one tire spins is that an open diff, or a limited slip. Link to comment Share on other sites More sharing options...
Rockfrog Posted February 9, 2014 Share Posted February 9, 2014 Do you have CAD? Then it's pretty much guaranteed to be a D30. They kinda look similar in a one eye closed at 20' kind of way. But if you are unfamiliar with axles I can see the confusion. here's a guide. Open is one tire fire, Limited slip is two tires spinning (some of the time) Link to comment Share on other sites More sharing options...
Blaine Posted February 9, 2014 Author Share Posted February 9, 2014 Do you have CAD? Then it's pretty much guaranteed to be a D30. They kinda look similar in a one eye closed at 20' kind of way. But if you are unfamiliar with axles I can see the confusion. here's a guide. Open is one tire fire, Limited slip is two tires spinning (some of the time) with LSD would it redirect which tires spins under load. like driver side will spin then it goes to passenger side. And when would the two tires be spinning with LSD. want to figure this out cuz i want more then one front tire and one rear tire spinning, id like both front to spin. in the future i want a air diff locker, but its expensive! so is there a stock diff that will turn both tires? and what year,make and model did the dana 44 come in? cause i converted my truck to 4wd, from a 86 pioneer IIRC Link to comment Share on other sites More sharing options...
Rockfrog Posted February 9, 2014 Share Posted February 9, 2014 D44 was only in the rear 87-89 (others will know yhe exact years) prior to that was an AMC20. The front axle has always been a D30. Limited Slip is a clutch pack loaded differential that prevents the unloaded wheel from spinning and allowing power to transfer to tue wheel with traction. Btheybdo have a slipping point where power will eventually take the path of least resistance and routebtobthe unloaded wheel. An LSD simply clamps both shafts together up to the slip point ... it doesn't redirect anything .... a full locker will prevent any one wheel from spinning slower than another. An open diff just sends power to the path of least resistance .... so you end up with the tire in the air spinning. Link to comment Share on other sites More sharing options...
Rockfrog Posted February 9, 2014 Share Posted February 9, 2014 http:// http://auto.howstuffworks.com/differential.htm There ya go 8 pages that explain them all, open, limited slip, locker, even tcase differentials. Link to comment Share on other sites More sharing options...
Blaine Posted February 9, 2014 Author Share Posted February 9, 2014 just went out and overlooked you r right on the money, dana 30. are they open or lsd? Link to comment Share on other sites More sharing options...
Blaine Posted February 9, 2014 Author Share Posted February 9, 2014 > http://auto.howstuffworks.com/differential.htm There ya go 8 pages that explain them all, open, limited slip, locker, even tcase differentials. thank you that explained it all. now I'm wondering if my dana 30 is open or lsd? Link to comment Share on other sites More sharing options...
Incommando Posted February 9, 2014 Share Posted February 9, 2014 The front D30 was always open from the factory. Link to comment Share on other sites More sharing options...
Blaine Posted February 9, 2014 Author Share Posted February 9, 2014 same for the rear i take it Link to comment Share on other sites More sharing options...
Eagle Posted February 9, 2014 Share Posted February 9, 2014 same for the rear i take it No. The factory always offered a Trac-Lok limited slip as an option for the rear axle. Any of the factory rear axles could be bought with limited slip: AMC 20, Dana 35, Dana 44, Chrysler 8.25 (if you're looking at Cherokees). Link to comment Share on other sites More sharing options...
Blaine Posted February 9, 2014 Author Share Posted February 9, 2014 is the dana 30 used in the rear as well? is there a way of checking to see what dana i have in the rear end w-out pulling the cover off, and whether or not its a trac-lok LS did they make Trak lok for the D30. and say i bought the dana 44 or 35 carrier, could i just transfer the ring gear so the gear ratio match Link to comment Share on other sites More sharing options...
Blaine Posted February 9, 2014 Author Share Posted February 9, 2014 herd about the detroit truetrac. how much better is truetrac from the stock trac lock LS in traction wise and life expectancy Link to comment Share on other sites More sharing options...
Minuit Posted February 9, 2014 Share Posted February 9, 2014 is the dana 30 used in the rear as well? is there a way of checking to see what dana i have in the rear end w-out pulling the cover off, and whether or not its a trac-lok LS did they make Trak lok for the D30. and say i bought the dana 44 or 35 carrier, could i just transfer the ring gear so the gear ratio match 1. No. 2. Look at the diff cover to identify the axle. Jack up both rear tires (jack the truck up by the diff housing) and spin one. If they both spin in the same direction at the same time you have a limited slip diff. 3. No. 4. No. Ring gears do not swap between axles and even then, there's more to a gear change than just the ring gear. You can't turn a D35 into a D44 - they're completely different units. Axle work is quite complicated. I think you're a bit confused here. Dana 35s, Dana 44s, etc. are NOT carriers or any other single part. They are completely different types of rear axles. Link to comment Share on other sites More sharing options...
Blaine Posted February 9, 2014 Author Share Posted February 9, 2014 hmm the dana differential # are for different size axles? like a dana 30 axle is smaller then the dana 44, might need some explanation on the differences. so if i wanted a 44 i would need to change diff. and axles. is a better option the truetrac from detroit. ive been going over allot of reviews and seems the biggest issue is the ring gear bolts not being to slide through the carrier cause some years had heavy duty bolt on them. if i were to go this route how i could i ensure I'm getting the right one, don't want to have to machine the carrier to get my bolts through EX. truetrac carrier has 3/8 in hole and your ring bolts or 7/16 or visa verse. Link to comment Share on other sites More sharing options...
Blue88Comanche Posted February 10, 2014 Share Posted February 10, 2014 If you are looking to get a limited slip, a true-track is what I would get. it has lots of good reviews for street use and mild off roading. The only reason I did not get the true-track is because I wanted lockers more... If Detroit / Eaton make a selectable locker that used the true-track system instead of open when unlocked I would buy that the second I could afford it..... Link to comment Share on other sites More sharing options...
Eagle Posted February 10, 2014 Share Posted February 10, 2014 is the dana 30 used in the rear as well? No. is there a way of checking to see what dana i have in the rear end w-out pulling the cover off, and whether or not its a trac-lok LS Check the illustrations in the post above. Your only choices are Dana 35 (all years), AMC Model 20 (1986 only), and Dana 44 (1987 - 1992) -- they do not look at all alike. The easy way to see if you have a working limited slip is to jack up one rear wheel, with the brake off and the transmission in neutral, and try turning the wheel. If it doesn't turn, you have a Trac-Lok. If it does turn, either you have an open diff, or you have a Trac-Lok that's worn out. did they make Trak lok for the D30. I don't know if Dana Spicer ever made one, but Jeep never offered it from the factory. and say i bought the dana 44 or 35 carrier, could i just transfer the ring gear so the gear ratio match If you have a Dana 35, you must buy a Dana 35 carrier. If you have a Dana 44, you must buy a Dana 44 carrier. Both axles have what's called a "carrier break" -- certain ratios need one carrier, other ratios need a different carrier. Link to comment Share on other sites More sharing options...
Eagle Posted February 10, 2014 Share Posted February 10, 2014 herd about the detroit truetrac. how much better is truetrac from the stock trac lock LS in traction wise and life expectancy Slightly better in traction, much better in life expectancy because it doesn't use clutches. However, the manufacturer only recommends it up to a certain tire size, which isn't all that big the way people are building Comanches these days. I think they don't want you to go larger than 32" tires. Link to comment Share on other sites More sharing options...
Blaine Posted February 10, 2014 Author Share Posted February 10, 2014 well its not the amc model 20, just by what the diff. cover looks. i think it finally broke through, when you all said axle i for some reason was thinking axles shafts, BRAIN FART. so i would need to get dana 44 axle, which would hold the d-44 carrier. correct? Link to comment Share on other sites More sharing options...
Blaine Posted February 10, 2014 Author Share Posted February 10, 2014 D44 was only in the rear 87-89 (others will know yhe exact years) prior to that was an AMC20. The front axle has always been a D30. So my rear is a d-35 open diff, sucky. obviously d-44 had different gear ratio then some other d-44. so if i were to buy a d-44 rear axle, could i buy a d-44 ring gear and pinion that would match up to the gear ratio of the d-30 in the front? or other way around, make the d-30 ratio match the d-44 Link to comment Share on other sites More sharing options...
Blaine Posted February 10, 2014 Author Share Posted February 10, 2014 so ive done some research and i believe i could go both ways, i could set the d-44 to 3.55 to match the front or make the d-30 a 4.11 to match the d-44, assuming those are the ratios seeing they are the most common IIRC (don't write it in stone) Link to comment Share on other sites More sharing options...
Rockfrog Posted February 10, 2014 Share Posted February 10, 2014 Huh? They come in multiple gear ratios depending on the drivetrain combination. If you go shopping for axles, just look for a similar drivetrain check the tag ... you may have to pop the cover and read the stamping. If you have 4.10 currently look for an XJ or MJ with a 4cyl engine and 5spd transmission. The XJ axle will just need new perches welded on but starting in 1992 the were using the 8.25 in the back. Link to comment Share on other sites More sharing options...
Blaine Posted February 10, 2014 Author Share Posted February 10, 2014 i know, but if i were to buy a dana 44 axle and say the gear ratio didnt match my front, could i buy a d-44 ring and pinion that could match my front gear ratio depending on what it is. Link to comment Share on other sites More sharing options...
Rockfrog Posted February 10, 2014 Share Posted February 10, 2014 Ok so doing a little re reading ... you are more likely to find a D44 in 3.55 anyway. But again I mention the 8.25 from an XJ without ABS. The are as strong as a D44 and far easier to find. Look for a 4.0L with automatic to find a 3.55 gear ratio. They were used from 92 to 2001 (27 spline to 96 and 29 spline after that). Way easier to find one of those really. Link to comment Share on other sites More sharing options...
Blaine Posted February 10, 2014 Author Share Posted February 10, 2014 awesome, and all axles will bolt up the same and brake lines the same too? Link to comment Share on other sites More sharing options...
Blaine Posted February 10, 2014 Author Share Posted February 10, 2014 another question, what are the spline counts and would it matter which spline count i got as long as gear ratio match? Link to comment Share on other sites More sharing options...
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