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Thread: Zenki LSD into RA23

  1. #1
    Junior Member Grease Monkey
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    Default Zenki LSD into RA23

    Hi all,

    I've been searching posts and the web for info on fitting the early AE86 'Zenki' LSD centre into a RA23 Celica. I believe that they fit into a '22 centre but not so sure about a '23?

    Thanks

    Kev
    Yes the old Celica's are great cars thanks..

    76 RA23 18RG
    85 GSXR 750 05 GSXR 750 77 RD400



  2. #2
    1941cc 2T-G Domestic Engineer w810sc's Avatar
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    Default Re: Zenki LSD into RA23

    If you type in "ta22 lsd" in the search box you should find these 2 threads in the 13+ pages:
    http://www.toymods.org.au/forums/tec...ease-help.html
    http://www.toymods.org.au/forums/tec...d-install.html
    deepdishfactory
    2T-G - Half the valves but twice the fun.

  3. #3
    Junior Member Automotive Encyclopaedia
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    Default Re: Zenki LSD into RA23

    22 and 23 t series diffs are the same aren't they?

  4. #4
    1941cc 2T-G Domestic Engineer w810sc's Avatar
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    Default Re: Zenki LSD into RA23

    Read o_man's post regarding T292:

    Quote Originally Posted by o_man_ra23
    Remember that if you have the T series (check your build plate, the early TA22s had D series), that the RA23, RA28 and RA40 diff centres all fit perfectly and are the same ratio. However, if you want a longer ratio that is better for highway use, go with the RA60 centre as it has 3.9:1 ratios rather than the standard 4.1:1s
    deepdishfactory
    2T-G - Half the valves but twice the fun.

  5. #5
    Junior Member Grease Monkey
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    Default Re: Zenki LSD into RA23

    Pretty sure the 23 has a T292. Well I may just have to open the wallet and get the LSD then.
    Yes the old Celica's are great cars thanks..

    76 RA23 18RG
    85 GSXR 750 05 GSXR 750 77 RD400



  6. #6
    Junior Member Automotive Encyclopaedia
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    Default Re: Zenki LSD into RA23

    I have also decided this rather than mess with diff transplants. Especially in a car of modest powers.

  7. #7
    My Wife says I have Too Much Toyota o_man_ra23's Avatar
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    Default Re: Zenki LSD into RA23

    I can confirm the LSD slots into the 23 centre perfectly. Went with brand new 3.73:1 crown and pinion for mine. Don't forget to machine 5mm off the end of each axle.
    Cheers, Owen
    1977 RA28 with 1JZ-GTE (Was 18R-GTE)
    Lancer EVO Brakes into old Celica/Corolla/Corona
    Doing the things that aren't popular... cause being popular and being good are often distinctly different.

  8. #8
    Junior Member Automotive Encyclopaedia
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    Default Re: Zenki LSD into RA23

    Is that for Kaaz as well as the TRD ones? I have read that the Kaaz ones go in without a problem.

  9. #9
    My Wife says I have Too Much Toyota o_man_ra23's Avatar
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    Default Re: Zenki LSD into RA23

    I have no experience with the Kaaz ones, but suspect that they won't require the machining. Cannot confirm nor deny this though.

    Can confirm the TRD ones require machining though.
    Cheers, Owen
    1977 RA28 with 1JZ-GTE (Was 18R-GTE)
    Lancer EVO Brakes into old Celica/Corolla/Corona
    Doing the things that aren't popular... cause being popular and being good are often distinctly different.

  10. #10
    Junior Member Backyard Mechanic J-M kujala's Avatar
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    Default Re: Zenki LSD into RA23

    With TRD / Kaaz no needed to cut. Only with stock LSD !!!!

    TRD KAAZ and almost all other aftermarket LSD units are designed to fit, with non lsd and lsd half shafts !!!!

    With old used lsd 5mm is not enough, sometimes they still hit the bottom !!! 6mm is the correct amount to cut. TA22 GT with 2TG and factory LSD half shafts are ~6mm shorter.

    Have install STOCK, TRD, KAAZ, Tomei lsd units to T series differential.
    - Celica TA-22 -74 2T-G Turbo
    - IQ 1.0 -09
    - Lexus IS250 -06

  11. #11
    Junior Member Backyard Mechanic egamirrorim's Avatar
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    Default Re: Zenki LSD into RA23

    Where can I find more information about Zenki LSDs? When I type it in Google all I get is links to forums selling second hand items.

    Do they have a website?

  12. #12
    Junior Member Backyard Mechanic
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    Default Re: Zenki LSD into RA23

    Quote Originally Posted by egamirrorim View Post
    Where can I find more information about Zenki LSDs? When I type it in Google all I get is links to forums selling second hand items.

    Do they have a website?
    Zenki LSD's are term used for earlier, small dia axle spline approx. 23mm, T series diffs from Toyota mainly used in pre 1985 AE86 sprinters. Later term is Kouki LSD which has approx. 25mm dia axle spline. Outer housings and internals except axle side gears are same between the two T series LSD's

    If you need dimensions or photos of lsd centre let me know I have a used Zenki centre in my shed which I will be in tomorrow.
    You can buy upgrade kits for T series, as well as others, from Weir Performance in US. Their prices are reasonable and service is good.

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