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Thread: identifying diff centre.. SOLVED!!!!!I is S-series TRD LSD

  1. #1
    Junior Member Too Much Toyota oldcorollas's Avatar
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    Default identifying diff centre.. SOLVED!!!!!I is S-series TRD LSD

    heya guys n gals,

    i have a TRD LSD centre sitting in front of me that i can't identify.
    so far i know the axles should be 23 spline and 24mm and it has an 8 bolt crown
    it is a little bigger than a 6" starlet diff (B? U?), so i'm thinking maybe it is a D, or an S, or an early T perhaps.
    the axles indicate early (zenki) T series, but the other dimensions seem too small?

    for the following measurements, i got (updated with U/6" measurements)
    1- 35mm (6" is 34or35?)(前期T=34or35?) (bearing is LM48510-N)
    2- 134mm (6" is 132)(前期T=144)
    3- 96mm (6" is 95)(前期T=99 or 105??)
    4- 128mm (6" is 116)
    side bearing part number is LM48510-N, outer diameter = 65mm

    edit: it is far too wide to be a U series, but is only slightly bigger diameter.. = S?
    edit: looking up this pretty good Timken bearing catalogue http://www.timken.com/EN-US/products...dOlder7391.pdf
    "SET5" = LM48510 cup = 6" diff and 6.38" diff. nothing else toyota up to 89

    i thought it was said S series LSD's don't exist?



    any help muchly appreciated!!
    Last edited by oldcorollas; 18-03-2009 at 11:34 AM.
    "I'm a Teaspoon, not a mechanic"
    "There is hardly anything in the world that a man can not make a little worse and sell a little cheaper" - John Ruskin (1819 - 1900)

    AU$TRALIA... come and stay and PAY and PAY!!! The moral high horse of the world!

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    Car Butcher Carport Converter WDE_BDY's Avatar
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    Default Re: Identifying diff centre.. D? S? T?

    Interesting. I am assuming it has TRD stamped on it? It is funny watch people try to sell standard S series 4 pinion centres as LSD's when they clearly aren't, however I doubt you would post without being damn sure its LSD. Got any pics of it? I have never heard of a D series LSD either so will be a rare item either way.
    You say it is bigger than Starlet 6" (U code), I know the B code looks physically smaller than U code so it could be a U code. Or have you got a known U code to compare? While the whole centres do interchange (if axles swapped) the pumpkins are different.
    Will e-mail a guy I know who has both B and U code LSD's and might be able to clarify what you have.

    Callum

  3. #3
    you can't say ****** here Automotive Encyclopaedia CLG's Avatar
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    Default Re: Identifying diff centre.. D? S? T?

    Quote Originally Posted by oldcorollas
    i thought it was said S series LSD's don't exist?
    They don't, however the standard S Series centre looks like an LSD carrier, it's just 4 pinion open centre.

  4. #4
    Junior Member Domestic Engineer 71TA22's Avatar
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    Default Re: Identifying diff centre.. D? S? T?

    [QUOTE=oldcorollas
    i thought it was said S series LSD's don't exist?

    [/QUOTE]

    TOSCO listed part number 41301-TE003 for 6.38" LMTD/SLP diff and 41301-TA002 for 6.62" LMTD/SLP diff so both S and D types existed.

    And 5.7", 6.0" and 6.25".

    Does not help you much though.
    Mike
    71 TA22

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  5. #5
    Junior Member Too Much Toyota oldcorollas's Avatar
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    Default Re: Identifying diff centre.. D? S? T?

    ok,
    it is definitely not a B 5.7", as i have had one of those and the axles are tiny
    i have compared to a U/X 6" as the axles are a full 1mm bigger, and the dimensions are a bit bigger. the PCD of the crown wheel is also a fewmm bigger than the 6"
    i originally bought hoping it was a 6"....
    the 5.7" is physically smaller as you say, and the axles are smaller again than the 23mm U series.

    It is definitely an LSD, i can see the LSD plates. (but i will check agian tonight )
    It definitely came in a TRD box, and looks consistent with all the other TRD centres i have had in my hands. i have not checked for markings tho. unfortunately, oil on the label has dissolved the ink that said what the model number is
    i have pics, can upload tonight

    hmm. if i can match up any of the outer dimensions, and axle dimesions with one of the series, then it probably is it....

    the bearing toyota part number matches between starlet (too big for starlet) and KE70.....
    Last edited by oldcorollas; 28-10-2008 at 01:22 PM.
    "I'm a Teaspoon, not a mechanic"
    "There is hardly anything in the world that a man can not make a little worse and sell a little cheaper" - John Ruskin (1819 - 1900)

    AU$TRALIA... come and stay and PAY and PAY!!! The moral high horse of the world!

  6. #6
    Junior Member Domestic Engineer 71TA22's Avatar
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    Default Re: Identifying diff centre.. D? S? T?

    By elimination (although wouldnt bet on it) from the TRD catalogue:

    KP LMTD/SLP diffs were specified at 5.7", 6.0" and 6.38".

    KE LMTD/SLP diffs were specified at 6.0", 6.25" and 6.38".

    If axles too big for 6.0" then would probably be 6.38".

    But could be 6.25"
    Last edited by 71TA22; 28-10-2008 at 01:56 PM.
    Mike
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    Car Butcher Carport Converter WDE_BDY's Avatar
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    Default Re: Identifying diff centre.. D? S? T?

    Quote Originally Posted by oldcorollas
    the bearing toyota part number matches between starlet (too big for starlet) and KE70.....
    Depending on year/engine size of Starlet, bearings should be same as KE70. I know for NZ, early (79-82) Starlet were X code and late (83-84) were the U code and exactly the same as KE70. KE70 here never got S code, that was only use in TE71 with 2T-B and in AE70/AE85.

    Callum

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    Junior Member Too Much Toyota oldcorollas's Avatar
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    Default Re: Identifying diff centre.. D? S? T?

    Thanks Mike
    hmm, the 6" axles would free spin inside there unfotunately... and 5.7 is even smaller

    i have not heard of a KP with an S series (6.38) diff but doesn't mean there wasn't any

    what did the 6.25" come in originally?

    thanks Callum ... hmmm
    i know the starlet X (142mm) and the KE10 B (145mm) centres are interchangable, but i am not sure about the KE10 axle splines.

    i know that KE30-55 and some KE70 had U series, same as the later KP6 starlets..

    and aus got S in AE86.. but apart from that.. i don't know much
    if it IS an S series (it is the old style of TRD box), then it might be an ok upgrade for a K powered car or for a cheap LSD for a relatively stock AE86/KE70...
    "I'm a Teaspoon, not a mechanic"
    "There is hardly anything in the world that a man can not make a little worse and sell a little cheaper" - John Ruskin (1819 - 1900)

    AU$TRALIA... come and stay and PAY and PAY!!! The moral high horse of the world!

  9. #9
    Junior Member Domestic Engineer 71TA22's Avatar
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    Default Re: Identifying diff centre.. D? S? T?

    Quote Originally Posted by oldcorollas

    what did the 6.25" come in originally?
    Some TE2# series Corollas also some RT81 Coronas. No idea which models specifically.
    Mike
    71 TA22

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    Car Butcher Carport Converter WDE_BDY's Avatar
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    Default Re: Identifying diff centre.. D? S? T?

    This may or may not help but got someone to measure up the axles they have stashed away -

    Quote Originally Posted by A top Bloke
    ok these the ones i've managed to find
    Series, diameter, axle spline count, what axle is from, extra notes.

    X ? (will need to pull an axle on the kp60 to find out)
    B 22.3dia x 20 (ke20)
    U 22.0dia x 20 (kp61)
    S ? (i had one but must have sold it)
    T: ....
    24.0dia x 23 spline Early type (ma45, te71, zenki ae86)
    25.1dia x 23 spline Late type (kouki ae86, masterace van front diff)
    26.5dia x 24spline Late type on steroids! (GT4 rear diff torsen, this was a surprise.. i guess i'll be resplining an F series axle after all).
    E 25?dia x 23 (no axles to measure OD, diff has pointier looking spline than the late T series axle)
    F 28.0dia x 27 spline (CR30)
    G 33?dia x 30 spline (hilux) have a head but no axles
    Callum

  11. #11
    toyota-less Carport Converter skiddz's Avatar
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    Default Re: Identifying diff centre.. D? S? T?

    the 24mm x 23spline axle points to d or zenki T, pretty sure there were d series LSD centres but i dont know if they were TRD spec i shall go and measure my zenki lsd centre and confirm that its not T, t series were 6.8 and d were 6.67 i think.....
    2T out 4A in....

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

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    toyota-less Carport Converter skiddz's Avatar
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    Default Re: Identifying diff centre.. D? S? T?

    mmk
    1 = 34mm
    2 = 144mm
    3 = 99mm

    there you have it not a T
    2T out 4A in....

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

  13. #13
    Junior Member Too Much Toyota oldcorollas's Avatar
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    Default Re: Identifying diff centre.. D? S? T?

    Thanks for that callum, and please thank the Top Bloke for me too
    must spread rep first

    Thanks Skids... so it's definitely not T series.... even though the axles match

    plot thickens... so pointing to D or S....
    i will hunt around for S axle dimensions today
    "I'm a Teaspoon, not a mechanic"
    "There is hardly anything in the world that a man can not make a little worse and sell a little cheaper" - John Ruskin (1819 - 1900)

    AU$TRALIA... come and stay and PAY and PAY!!! The moral high horse of the world!

  14. #14
    Junior Member Domestic Engineer 71TA22's Avatar
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    Default Re: Identifying diff centre.. D? S? T?

    Quote Originally Posted by skiddz
    the 24mm x 23spline axle points to d or zenki T, pretty sure there were d series LSD centres but i dont know if they were TRD spec i shall go and measure my zenki lsd centre and confirm that its not T, t series were 6.8 and d were 6.67 i think.....
    Early T type was 6.7" and D type was 6.62". Both ran 24mm x 23spline axles. I swapped my D type LSD for an early T type LSD years ago when original diff wore out.

    Both LSD's were standard Toyota 2 pinion items. TRD produced 4 pinion LSD's for each type (41301-TA002 for D type and 41301-TA003 for early T type).
    Mike
    71 TA22

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  15. #15
    teq Grease Monkey
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    Default Re: Identifying diff centre.. D? S? T?

    Quote Originally Posted by oldcorollas
    Thanks Skids... so it's definitely not T series.... even though the axles match
    S-series (6.38") axles are the same spline size & count as Zenki AE86 T-series (6.7)

    Andrew

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