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Thread: JZA80 Differential Info!

  1. #101

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    @ imindirocz28

    I've read that too,
    but I was thinking if there can be made some mods to make it working like GS400 open diff with 3.26 gearing on MKIV to jump from 4.1 gearing.

    Any ideas?


    Thanks

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  3. #102
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    If you want a gs400 rear check my sig.

    However, people have tried to swap different year carriers into the mkiv housings and they don't fit. I'm sure you could machine or weld or something to make it, but it's not with the trouble.

    The only other option is if you machined 2 steel plates, and kind of create a "Dave H" LSD.
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  4. #103

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    @ imindirocz28

    As I read, IS200 (Altezza) diff is 7.5inches and na supra diff is 8inches, those are outer diameters of the ring gears, right?

    My question is that, if I remove the ring gear from supra open diff and put it on Altezza TRD lsd diff, will it fit in the casing of na supra rear end?

    Anyone experienced in this case would be respected .

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  6. #104
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    The 8" gear wont fit a 7.5" diff.

    Not to mention, I'm pretty sure the inside width of the cases is different.

  7. #105

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    How is it possible to make that TRD LSD work in my MIKV? I badly need lsd on my soup, evenmore trd lsd.

    Any good ideas please?

  8. #106
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    You can buy a TRD LSD to fit the NA/tt diff. Or you can machine your own DAVE H style lad.

  9. #107

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    Thanks for advice, but I'll show u my point of view,

    Buying a LSD to fit na diff = 728$ + shipping to my country + customs = ~1100$.
    This Altezza diff is about $300 and here, no extra fees.

    Dave H lsd refers to welded open diff probably? Any guide to do this? And is it safe for street?

    Thanks

  10. #108
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    Quote Originally Posted by bequa View Post
    Thanks for advice, but I'll show u my point of view,

    Buying a LSD to fit na diff = 728$ + shipping to my country + customs = ~1100$.
    This Altezza diff is about $300 and here, no extra fees.

    Dave H lsd refers to welded open diff probably? Any guide to do this? And is it safe for street?

    Thanks

    There is absolutely nothing in the Altezza diff or a MK2/MK3 Supra diff that can be transplanted into a JZA80 large or small diff. Believe me, I've had a lot of IS300/IS200/Altezza guys ask me similar questions and if there was a direct transplant, I'd have it all over the second post of this sticky. What you are trying to do will not work.

    With fabrication talent & the correct driveshaft & axle parts you might be able alter your JZA80 subframe & complete Altezza differential to mount to each other, but I have no idea if the axles would fit the JZA80 hubs, and they might be too long or too short to fit correctly anyway.
    Even if all that was possible (which it probably isn't) and you reworked everything to fit, you have a much much weaker rear differential and it is absolutely silly to go to so much work just to downgrade that part.

    Do you have any 1st or 2nd generation Aristos or JZZ30 Soarers around? Those differentials are a bolt-in solution, and any factory or aftermarket LSD you find fitted to any of those three platforms will work in your Supra, assuming your Supra has the small differential (I don't know of any large-pattern Supra differentials that were fitted with an open diff)
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  11. #109
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    You're not going to get an 8" ring gear to fit a 7.5" carrier.

    The Dave H LSD IS 2 machines steel blocks that slide into the center of the carrier between the spider gears. I have some pics. I'll post them when I get back.

  12. #110
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    i have a 98 gs and i want put an lsd but dont know what housing and lsd i need any help would be appreciated.

  13. #111
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    I'm pretty sure you need the one for the auto tt rear end.

  14. #112
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    I need help identifying my diff. I got it from a 93 mk4 tt auto supra to drop in my sc3 I attempted looking for a code there is no sticker but on the diff cover is a print that says F20SZ and under that is 2-1

    Any help please

  15. #113
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    No idea what those numbers are, best bet is to pop the rear cover off and see if it's a Torsen or an open diff. Count the revolutions of the 3-prong input shaft as you rotate one of the axle shafts exactly 360*. If it spins about 3.75 times for one 360* spin of the axle, and it's got a Torsen LSD, you've got a TT auto diff. Not a lot more to it.

  16. #114
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    Quote Originally Posted by gfallon View Post
    i checked my 95 n/a 5speed and it has the A02A diff coed. so i did get the 4.2 with mine and it did have an open diff in it also. mine was made in 12/04
    I have a US Spec 93 NA 5speed(w58) and also has the A02A rear diff code. By every thing I read.... A(standard) 02(4.272:1) A(open diff).

    A = standard diff
    B = optional diff
    01 = 3.769 (TT Auto)
    02 = 4.272 (N/A Auto, N/A 5MT)
    07 = 3.133 (TT 6MT)
    D = means it is a full 2 way torsen LSD
    C = supposed to mean 1.5 way torsen LSD (I have yet to see one)
    B = supposedly is only a 1way torsen LSD (every JDM LSD diff I have seen has this code)
    A = Open Diff

    By going off all the information in this thread, I'm still getting conflicting information.
    Some of the information says my car should have a A05A rear diff. Its also posted that the A02A only comes in the 97-98 TT Auto?? That is obviously not the case as myself and others in this thread posted otherwise. What gear ratio is the A05A?

  17. #115
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    Quote Originally Posted by FLZ_Boy View Post
    I followed up my neighbors 1998 NA. His axle code is A05A, which meant its a 4.08 with an open diff, but he confirmed to me it had a torsen LSD.
    Quote Originally Posted by 360rwkw View Post
    The last letter of A means it was originally a non-torsen diff, so if it is now a torsen diff then someone must have changed it prior to him owning it or he is mistaken.
    My 98 supra also has a A05A axle code but when I got the original window sticker reprinted. It says my car is equipped with a torsen LSD from the factory.
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  18. #116
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    Quote Originally Posted by Dominator84 View Post
    My 98 supra also has a A05A axle code but when I got the original window sticker reprinted. It says my car is equipped with a torsen LSD from the factory.
    I been adament with this point that 1998 USDM NA Supras came with a Torsen LSD as standard equipment. I believe it was stated on a 98 brochure and I remember reading the 1998 service manual stating/chart that a. toresen was standard.
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  19. #117
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    Quote Originally Posted by FLZ_Boy View Post
    I been adament with this point that 1998 USDM NA Supras came with a Torsen LSD as standard equipment. I believe it was stated on a 98 brochure and I remember reading the 1998 service manual stating/chart that a. toresen was standard.
    I also have a 29k mile '98 N/A and window sticker says it has a torsen LSD but when I did my swap I checked and it was open. I still have the original diff on my shelf, I swapped it out to a turbo LSD. John
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  20. #118
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    Quote Originally Posted by jsantesson View Post
    I also have a 29k mile '98 N/A and window sticker says it has a torsen LSD but when I did my swap I checked and it was open. I still have the original diff on my shelf, I swapped it out to a turbo LSD. John
    Hey John, how did you check your diff? I want to check mine and verify if it is LSD or not. Thanks!

  21. #119
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    Quote Originally Posted by Dominator84 View Post
    Hey John, how did you check your diff? I want to check mine and verify if it is LSD or not. Thanks!
    Look at Wreckless post in this thread #113, he talks about what to look for.

  22. #120

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    dear brothers
    i purchased this differential for supra 6 speed but i wanna know this differential for supra USA or for supra JDM , iwant know this differential for JDM , UK, EUROPE or USA that what i need know

    note:
    is the difference between US and JDM in the ratio
    1- (USA)TT 6-spd 93-98 US spec---- 3.133:1, LSD standard, big diff, big flange, cooling 'ears' on diff cover. Code B07D.
    2- (JDM) RZ 6-spd 93-5/96 (V160)---- 3.266:1, LSD standard, big diff, big flange, cooling 'ears' on diff cover, Code B03B

    RZ, RZ-S 6-spd 6/96-2002 (V161)---- 3.266:1, LSD standard small diff, big flange, cooling 'ears' on diff cover**** Code A03B

  23. #121
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    Quote Originally Posted by Emad Salem View Post
    dear brothers
    i purchased this differential for supra 6 speed but i wanna know this differential for supra USA or for supra JDM , iwant know this differential for JDM , UK, EUROPE or USA that what i need know

    note:
    is the difference between US and JDM in the ratio
    1- (USA)TT 6-spd 93-98 US spec---- 3.133:1, LSD standard, big diff, big flange, cooling 'ears' on diff cover. Code B07D.
    2- (JDM) RZ 6-spd 93-5/96 (V160)---- 3.266:1, LSD standard, big diff, big flange, cooling 'ears' on diff cover, Code B03B

    RZ, RZ-S 6-spd 6/96-2002 (V161)---- 3.266:1, LSD standard small diff, big flange, cooling 'ears' on diff cover**** Code A03B
    If you had actually read this thread, and seen the pics in the 11th post, you'd know that you have a European market differential because of the oil level sensor and various lines/fittings for a remote oil cooler.

    Yes, the difference between the USDM and early JDM TT 6-spd differentials is the ratio. That's why everything else is listed as being the same except for the gear ratio and the diff code.

  24. #122

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    thanks for you Sir
    i purchased TRD LSD ,i wanna know if i can install TRD LSD on that european differential or i can't

  25. #123
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    Question fellas

    I am picking up a 5spd, stock trans W58 SC300. It is NA-T, going to be my road race car, so I'm planning to make around 400whp in the future (1-2 years).... need advice on what I should do in regards to the drivetrain. I need an LSD and have decided that for my power goals and cost effectiveness, a Supra TT Auto LSD would work best.

    From my research, dropping the LSD itself into the stock SC300 pumpkin would work and will NOT screw up my speedo/gearing. However, if I install the entire Auto TT pumpkin, it would lengthen my gears, so like 70mph will show 62mph on my speedo since the speed sensor is in the trans. Now, I imagine dropping in a R154 when time comes, the question is, which would work better for me, buy the stock Auto TT LSD alone and drop it into my SC pumpkin, or buy the entire Auto TT pumpkin and just watch my speedo for the next couple of years?

    Thanks
    Jeremy

    EDIT: did my own research... looks like keeping the SC300 pumpkin would be a little closer to the right speedo display. Overall, it's still not that bad.

    Gearing.png
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  26. #124
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    Quote Originally Posted by Emad Salem View Post
    thanks for you Sir. i purchased TRD LSD ,i wanna know if i can install TRD LSD on that european differential or i can't
    Yes you can. I know because I have one in my UK spec TT auto diff. This is the big 220mm diff with 3.538:1 ratio. As far as I know you can buy a TRD LSD for both the small and big diffs (make sure you buy the correct one for your diff) and they will fit in to all the mkiv Supra diffs.


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  27. #125
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    Do you guys know anything about the Soarer diffs? One guy from Club Lexus offered me this:

    "The other Soarer diff is an open locking diff. It does not have an LSD, but it locks when torque is applied. Its also a 5sp diff. Its also a complete pumkin."

    An open diff that locks? Isn't that an LSD? Any information on that?

    Thanks

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