200mm vs 220mm rear diff

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Thread: 200mm vs 220mm rear diff

  1. #1
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    200mm vs 220mm rear diff

    How much stronger is the 220mm diff ? What is the highest hp on a 200mm diff ?

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    SupraForums Member T6Rocket's Avatar
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    It's not so much how much power, but how the power is being applied on launch.

    6 spd - go with 220mm, Auto - go with 200mm. Both diffs have had 1200+HP put thru them, but auto is much easier with a footbrake launch than a clutch sidestep.

    Oh yeah, there is also the gearing thing; 3.13 or 3.26 (220mm) is perfect for a 6 spd, and 3.76 (200mm) is perfect for an auto.

    Al
    94TT Auto, 6466
    [email protected] 27 psi 4/16/16
    Previous setup: HKS Twin 2835's
    [email protected] 32 psi, 10/29/06

    Previous car: 90 Talon AWD, 5 spd, FP Red (60-1)
    [email protected] built motor, 28 psi, Sept 2000

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    SupraForums Member FUZION84's Avatar
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    On ebay they have a bunch of diffs for sale. I need to get the auto one..but they have them by size like 8" or 8.7" which will fit the auto?
    SC300 2jzgte/6spd - FINALLY UNDER THE KNIFE!!!

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    Super Moderator Wreckless's Avatar
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    Quote Originally Posted by FUZION84 View Post
    On ebay they have a bunch of diffs for sale. I need to get the auto one..but they have them by size like 8" or 8.7" which will fit the auto?
    The only ratios suitable for an auto installed in JDM or US spec Supras came in the 200mm diff, which is roughly 8in (200mm/25.4mm/in = 7.87in) and the 220mm diff is roughly 8.7in (220mm/25.4mm/in = 8.66 in)
    It's worth noting that I've seen other references to the 200mm diff specifying it as a 205mm, but I haven't bothered actually measuring any of the 200mm diffs I own. The 205mm value brings it to just over 8in (205mm/25.4mm/in = 8.07in)

    The 200mm/8in diffs came with a large variety of ratios. If you are using the toyota automatic, the TT auto rear diff is the best with a 3.769:1 and a factory fitted LSD. Other options include the 3.916:1 92-97 SC400 diff, 4.082:1 SC300 5-spd diff, and the 4.272:1 NA Supra & SC300 automatic diff.

    Note that the SC300 and NA Supra differentials will require swapping out the 3-hole companion flange that bolts to the driveshaft 'donut' in order to be used with a TT auto drive shaft. The SC400 and TT auto Supra use the larger companion flange, and that will be a direct swap so long as you're using a TT auto drive shaft. If you're using a 6-spd drive shaft, you may need to have the DS shortened slightly depending on your application.

    Other info here: https://www.supraforums.com/forum/sho...ferential-Info!
    Jeff
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    Who would have ever thought.....the impact an automobile can make.....

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    thanks for the respond guys . The car will have a viper T56 6 speed. Will the 200mm with a TRD lsd hold 1000hp reliable ? Or should i just cash out and buy a 220mm diff ?

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    Blood for Blood RogueSupra's Avatar
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    Both rear ends have held the HP. What you are still not getting is the gearing ... you do not understand the final drive ratio so you might end up with a very poor driving car.
    MKIV TT



    If you can READ this thank a teacher. If its in ENGLISH thank a VETERAN.

  9. #7
    Super Moderator Wreckless's Avatar
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    Quote Originally Posted by supra ling View Post
    The car will have a viper T56 6 speed.
    Many have tried this - none of them have been satisfied.
    The 220mm diff isn't even available in ratios that would be T56 friendly as its ratio spread is entirely different than the V160/V161's.
    What Toyota made is all we got, this isn't a diff where you can just call up Richmond and order whatever..

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    Yes I understand the t56 have 5 and 6 as overdrive. that is why I would like to run the 200mm rear end so I can
    Run 4.26 gear. Just concern if the 200mm will be able to hold the power

  11. #9
    SupraForums Member HPR_47's Avatar
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    The Facelift JDM 6 speed cars had the smaller casing diff with 3.26 gearing.

    People utilising that setup had no issues with power until they hit the track with hard launching.

  12. #10
    Super Moderator Wreckless's Avatar
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    Quote Originally Posted by HPR_47 View Post
    The Facelift JDM 6 speed cars had the smaller casing diff with 3.26 gearing.

    People utilising that setup had no issues with power until they hit the track with hard launching.
    Most of the differential-grenading problems can be solved by using all of the billet differential mounts to help eliminate wheelhop, as well as avoiding drag radials entirely and using a full wrinklewall slick instead.

    I've seen ~450hp BPU 6-spd cars grenade that 220mm diff because of wheelhop on drag radials.

  13. #11
    SupraForums Member FUZION84's Avatar
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    Quote Originally Posted by Wreckless View Post
    The only ratios suitable for an auto installed in JDM or US spec Supras came in the 200mm diff, which is roughly 8in (200mm/25.4mm/in = 7.87in) and the 220mm diff is roughly 8.7in (220mm/25.4mm/in = 8.66 in)
    It's worth noting that I've seen other references to the 200mm diff specifying it as a 205mm, but I haven't bothered actually measuring any of the 200mm diffs I own. The 205mm value brings it to just over 8in (205mm/25.4mm/in = 8.07in)

    The 200mm/8in diffs came with a large variety of ratios. If you are using the toyota automatic, the TT auto rear diff is the best with a 3.769:1 and a factory fitted LSD. Other options include the 3.916:1 92-97 SC400 diff, 4.082:1 SC300 5-spd diff, and the 4.272:1 NA Supra & SC300 automatic diff.

    Note that the SC300 and NA Supra differentials will require swapping out the 3-hole companion flange that bolts to the driveshaft 'donut' in order to be used with a TT auto drive shaft. The SC400 and TT auto Supra use the larger companion flange, and that will be a direct swap so long as you're using a TT auto drive shaft. If you're using a 6-spd drive shaft, you may need to have the DS shortened slightly depending on your application.

    Other info here: https://www.supraforums.com/forum/sho...ferential-Info!
    im using the gs430 rear with 3.26 gearing. So i need to get the 8" torsen lsd then correct? which is ment for the Auto TT, The auto tt and the GS430 have the same guts.

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    GS430 straight drop in?

  15. #13
    SupraForums Member FUZION84's Avatar
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    yup....ask quickgs he installed it

  16. #14
    SupraForums Member gerrb's Avatar
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    Quote Originally Posted by jtweezy View Post
    GS430 straight drop in?
    Quote Originally Posted by FUZION84 View Post
    yup....ask quickgs he installed it
    And early SC430 , same 3.26 and straight drop in !
    1995 MKIV 3.4L 6speed Targa PT7685 ProEFI 128
    1995 MKIV 3.4L 6speed HardTop Gen 2 PT7675 AEM Infinity
    1994 MKIV Built 3.0 6speed HardTop GTX4202r Haltech PS2000 - SOLD
    1993 MKIV Built 3.0 6speed Targa PT-7175 AEM V2
    1992 SC400 2jzgte Built 3.0 ATF A340e PT6765 ProEFI 128
    1992 SC300 2jzgte Stock 3.0 ATF A340e OEM Twins Stock ECU
    1992 SC400 2jzgte Built 3.0 ATF A340e PT6870 ProEFI 128
    1997 SC300 2jzgte VVTi 3.4L 6speed Gen 2 PT8385 MoTeC -> Under the Knife

  17. #15
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    Quote Originally Posted by Wreckless View Post
    The only ratios suitable for an auto installed in JDM or US spec Supras came in the 200mm diff, which is roughly 8in (200mm/25.4mm/in = 7.87in) and the 220mm diff is roughly 8.7in (220mm/25.4mm/in = 8.66 in)
    It's worth noting that I've seen other references to the 200mm diff specifying it as a 205mm, but I haven't bothered actually measuring any of the 200mm diffs I own. The 205mm value brings it to just over 8in (205mm/25.4mm/in = 8.07in)

    The 200mm/8in diffs came with a large variety of ratios. If you are using the toyota automatic, the TT auto rear diff is the best with a 3.769:1 and a factory fitted LSD. Other options include the 3.916:1 92-97 SC400 diff, 4.082:1 SC300 5-spd diff, and the 4.272:1 NA Supra & SC300 automatic diff.

    Note that the SC300 and NA Supra differentials will require swapping out the 3-hole companion flange that bolts to the driveshaft 'donut' in order to be used with a TT auto drive shaft. The SC400 and TT auto Supra use the larger companion flange, and that will be a direct swap so long as you're using a TT auto drive shaft. If you're using a 6-spd drive shaft, you may need to have the DS shortened slightly depending on your application.

    Other info here: https://www.supraforums.com/forum/sho...ferential-Info!
    i have a DSS 6speed driveshaft bolted to a 200mm auto diff bolted straight up Question is i want to install 220mm 12 bolts jdm diff any suggestions u think i ve to do>>

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