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Thread: how can you tell if its an lsd?

  1. #16
    Junior Member Too Much Toyota oldcorollas's Avatar
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    Default Re: how can you tell if its an lsd?

    but if you hold the pinion and the other side, the one axle turning should bite?
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  2. #17
    The Evil Director Backyard Mechanic jfallen's Avatar
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    Default Re: how can you tell if its an lsd?

    let me think before answering..... scratches chin....

    Point: a torsen diff will only act as an LSD if Both wheels are in contact with the ground.

    Thus if you hold the pinion (or tailshaft) steady, eg car in gear, and jack up the back end. Spining one wheel will casue the other to spin in he opposite direction like an open diff.

    it will even act as an open diff if you spin the tail shaft and hold one whel steady.

    However if you spinf the tail shaft, and put a load on each wheel the action of he overly complex wurm gears will cause both wheels to turn in the same direction. Basically a TORSEN diff is the exact opposite of an open diff. Where an open diff sends torque to the wheel with the least traction, a TORSEN diff sends torque to the wheel with the most reaction (Up to 80%.) Thus you could be driving on the open road in a straight line with one wheel on the gravel and one on the tarmac, hit th accelerator and the actioni of the diff will casue torque to be sent to the wheel on the tarmac. No computers, not clutch packs.

    It's in essence an active mechanical LSD, that's why AUDI's Quattro has been so successful, as they use a torsen centre and rear diff. It's simple, it doesn't wear out and its ver very effective as torque is always sent to the wheel with the most traction.

    Probably the best thing the American's have given the automoive industry.

    Cheers
    Jordan
    Past rides: 86 Hilux, 3x ke55 rollas's (2coupes,) 5th Gen GT4 x2, RA28, TA22 x3, KE10, P610 datto, RT40 corona x3, RT132, MX13

    Currrent: , CA-A22 Celica living life as a Sports Sedan, 2000model ST215W Caldina GT-T manual, RT40 corona.

  3. #18
    toyota-less Carport Converter skiddz's Avatar
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    Default Re: how can you tell if its an lsd?

    easiest way = rev to 5000, dump clutch. count the number for tracks, 1= sad panda 2 = lsd goodness
    2T out 4A in....

    4A out 3VZ in. 3vzfe rebuild, RWD-ising, and conversion for ta22

  4. #19
    Tradie Grease Monkey jcmunga's Avatar
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    Default Re: how can you tell if its an lsd?

    Quote Originally Posted by jfallen
    let me think before answering..... scratches chin....

    Point: a torsen diff will only act as an LSD if Both wheels are in contact with the ground.

    Thus if you hold the pinion (or tailshaft) steady, eg car in gear, and jack up the back end. Spining one wheel will casue the other to spin in he opposite direction like an open diff.

    it will even act as an open diff if you spin the tail shaft and hold one whel steady.

    However if you spinf the tail shaft, and put a load on each wheel the action of he overly complex wurm gears will cause both wheels to turn in the same direction. Basically a TORSEN diff is the exact opposite of an open diff. Where an open diff sends torque to the wheel with the least traction, a TORSEN diff sends torque to the wheel with the most reaction (Up to 80%.) Thus you could be driving on the open road in a straight line with one wheel on the gravel and one on the tarmac, hit th accelerator and the actioni of the diff will casue torque to be sent to the wheel on the tarmac. No computers, not clutch packs.

    It's in essence an active mechanical LSD, that's why AUDI's Quattro has been so successful, as they use a torsen centre and rear diff. It's simple, it doesn't wear out and its ver very effective as torque is always sent to the wheel with the most traction.

    Probably the best thing the American's have given the automoive industry.

    Cheers
    Jordan
    right, but im guessing its totally different if its just a standard LSD??
    Daily Driver: Holden Rodeo
    Under Construction: RA28

  5. #20
    toyota-less Carport Converter skiddz's Avatar
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    Default Re: how can you tell if its an lsd?

    there are 2 types of lsd, the "standard depends on the car, ie jdm ae86 has clutch pack, and audi quattro has torsen or quaiffe
    2T out 4A in....

    4A out 3VZ in. 3vzfe rebuild, RWD-ising, and conversion for ta22

  6. #21
    Tradie Grease Monkey jcmunga's Avatar
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    Default Re: how can you tell if its an lsd?

    Quote Originally Posted by skiddz
    there are 2 types of lsd, the "standard depends on the car, ie jdm ae86 has clutch pack, and audi quattro has torsen or quaiffe
    hehe, well its standard out or a 95 hilux, its all out of the car but just been put back together and is currently sitting on the ground
    Daily Driver: Holden Rodeo
    Under Construction: RA28

  7. #22
    toyota-less Carport Converter skiddz's Avatar
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    Default Re: how can you tell if its an lsd?

    from what i can find its clutch pack, correct me if im wrong people
    2T out 4A in....

    4A out 3VZ in. 3vzfe rebuild, RWD-ising, and conversion for ta22

  8. #23
    The Evil Director Backyard Mechanic jfallen's Avatar
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    Default Re: how can you tell if its an lsd?

    what about a viscus LSD or Detroit locker??
    Past rides: 86 Hilux, 3x ke55 rollas's (2coupes,) 5th Gen GT4 x2, RA28, TA22 x3, KE10, P610 datto, RT40 corona x3, RT132, MX13

    Currrent: , CA-A22 Celica living life as a Sports Sedan, 2000model ST215W Caldina GT-T manual, RT40 corona.

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