conquestador89 Posted May 13, 2013 Report Share Posted May 13, 2013 kinda got stuck getting out the gas station from being too low...I was some what teeter tottering...right rear higher than left rear...only wheel spinning was the right rear...so does that mean my diff is bad?? Link to comment Share on other sites More sharing options...
Shelby Posted May 13, 2013 Report Share Posted May 13, 2013 not nessarily so,, could be stuck disks,, man you realy must be low hehe you can't get some help pushing ?? , or place boards under the driven tire Link to comment Share on other sites More sharing options...
conquestador89 Posted May 13, 2013 Author Report Share Posted May 13, 2013 (edited) I carry 2x4s in the car for times like these...comes in handy when I drive to places that aren't lower car friendly...you think a diff oil change would help?? Edited May 13, 2013 by conquestador89 Link to comment Share on other sites More sharing options...
ucw458 Posted May 13, 2013 Report Share Posted May 13, 2013 What year diff and IC or no IC? Most non IC cars had open diffs. Link to comment Share on other sites More sharing options...
Shelby Posted May 13, 2013 Report Share Posted May 13, 2013 OP's name implys he has an 89 if so it should have LSD,,but after 20 some yrs any thing is possible Link to comment Share on other sites More sharing options...
Technology Posted May 13, 2013 Report Share Posted May 13, 2013 If you are reversing, it could be more of a problem than going forward. The discs may be worn. Upon delivering my quest to the new owner, he has a steep driveway and my car also lifted the right rear off the ground cause it was low and stiffly sprung. It wouldn't back up, only spinning the lifted wheel. Getting a sharper angle to the driveway fixed the issue, but it still got sideways if too much power was applied in low gears, so I didn't know what to think. Was the diff bad, or does it not work as well in reverse? Link to comment Share on other sites More sharing options...
Convette Posted May 13, 2013 Report Share Posted May 13, 2013 (edited) My car does that all the time, same thing. I wouldnt worry about it. I still spin both every time when it matters. Edited May 13, 2013 by Convette Link to comment Share on other sites More sharing options...
Shelby Posted May 13, 2013 Report Share Posted May 13, 2013 gentle men you just learned the diff in LSD and Posi trac Link to comment Share on other sites More sharing options...
StarquestRescue Posted May 13, 2013 Report Share Posted May 13, 2013 It is explained in the first few pages. For optimum performance there must be some load on both wheels. This load creates additional pressure on the clutch packs. http://www.starquestgarage.com/manuals/service/conquest/1988/88_conquest_service_manual_-_group_03_-_rear_axle.pdf Link to comment Share on other sites More sharing options...
Technology Posted May 14, 2013 Report Share Posted May 14, 2013 A Posi-Trac (GM nomenclature for their version of a clutch-type LSD differential) is still a clutch-type limited slip diff. Not a locker. The Starion/Conquest uses a clutch type differential as well. Though simply called a Limited Slip Differential because Mitsubishi is more modest than any of the Big Three American car brands. That last bit is my opinion. They are the same Shelby. Maybe you just learned something. Link to comment Share on other sites More sharing options...
Shelby Posted May 14, 2013 Report Share Posted May 14, 2013 A Posi-Trac (GM nomenclature for their version of a clutch-type LSD differential) is still a clutch-type limited slip diff. Not a locker. The Starion/Conquest uses a clutch type differential as well. Though simply called a Limited Slip Differential because Mitsubishi is more modest than any of the Big Three American car brands. That last bit is my opinion. They are the same Shelby. Maybe you just learned something. ok just for fun how many of each style diff have you rebuilt old style chyr Posi-trac was disk but the diff is they were spring load'd full time , you needed 150 ft lb to slip one wheel and not the other with one or both off the ground and while you reading that FSM don't over look the part on testing and checking LSD disk slip pressure on one wheel with out turning the other wheel Link to comment Share on other sites More sharing options...
Lizzord30 Posted May 14, 2013 Report Share Posted May 14, 2013 Some montero guys will use the e brake on just enof to get load on the LSD for it to work. Link to comment Share on other sites More sharing options...
Technology Posted May 15, 2013 Report Share Posted May 15, 2013 I haven't rebuilt any of them. But I've read about and seen pictures of both. Have you ever seen a loose or failed GM Posi-trac differential? Link to comment Share on other sites More sharing options...
Shelby Posted May 15, 2013 Report Share Posted May 15, 2013 I haven't rebuilt any of them. But I've read about and seen pictures of both. Have you ever seen a loose or failed GM Posi-trac differential? have rebuilt 8 or so of the gm's older ones none of the new stuff , no comparison from them to a real chyr posi-trac with 14 years working in a chyr dealership I did more then my share of posi trac units part of the problem with the mits LSD unit is wear in the carrier from the spring plates making scar marks or ridges these ridges can cause a plate to hang up and not apply full pressure on the frition plates , they can work fine for a while then at odd times alow one wheel to spin , full load on both wheels can often break the stuck plate loose and it work fine for both wheel loaded I had one 86 diff do that for a week, did a few figure 8's in each direction 5 or 6 times and they freed up and worked fine from then on as far as I know , it's a known fact most of our LSD units were set up too loose from the factory , with one spring plate out of place , reason for that was to soften the binding when making tight turns Link to comment Share on other sites More sharing options...
19cturbo Posted May 15, 2013 Report Share Posted May 15, 2013 isnt it supposed to do that? without load, it will only spin the free wheel? Same reason that when you break an axle, your dead in the water, it just spins the free side, at least from my experience thats how its always been. with one tire off the ground, your stuck. Link to comment Share on other sites More sharing options...
Shelby Posted May 15, 2013 Report Share Posted May 15, 2013 isnt it supposed to do that? without load, it will only spin the free wheel? Same reason that when you break an axle, your dead in the water, it just spins the free side, at least from my experience thats how its always been. with one tire off the ground, your stuck. no that's not how they are supose'd to work,,but in the real world that's how most do work.when you read the FSM's instruction on how to set up your LSD it differs from what they actualy did ,,set up as the FSM tells you makes them very tight and one wheel will be very hard to spin by it's self,, but durring assembly they change'd the plate lay out to make the grip less so it turns with less effort and less shuttering meaning less consumer complaints about rear end noise Link to comment Share on other sites More sharing options...
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