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  1. #1
    working on it
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    Default LSD vs. non-LSD transmission and axle comparison pics

    Transmissions:

    If you know what to look for, distinguishing between an LSD and non-LSD transmission is pretty easy. An LSD gear box has a bulge where the driver side axle enters the transmission. This same area is almost completely flat on a non-LSD transmission. Also notice the LSD transmission has a very large driver side axle seal (larger than the passenger side seal). The driver side axle seal on the non-LSD transmission is much smaller (same size as the passenger side seal).





    Axles:

    The LSD axle is above and the non-LSD axle is below. On an LSD transmission the LSD itself is located on the driver side and bulges out several inches. The shape of the driver side LSD axle reflects that (the passenger side axle is the same regardless of LSD). This is why you can’t use LSD axles in a non-LSD transmission or vice versa. They are very similar, but quite different.



    The hub ends are identical:



    The center sections are similar, but elongated on the non-LSD axle:



    Here are the “business ends.” The LSD is labeled “J G” and the non-LSD is labeled “J L,” but I’m not sure if all OEM axles were labeled this way. The LSD axle has much longer splines, but notice both axles are actually the same length overall:



    If you’re still having trouble seeing how this all works, here is a drawing that shows how the LSD bulge comes into play:


  2. #2
    Est. 2003 - Grade A Beef
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    Default

    moved to proper section
    Manny
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  3. #3
    Weekend Warrior
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    All this is based on the MANUAL SR20 axles and MANUAL SR20 trannies correct? I'm sure it is, but we do still have a couple of guys still trying to stay auto in the SR20-World

    1.) Would this be the same for LSD vs NON-LSD "SR20 AUTO trannies"?

    2.) Same question goes for the SR20 AUTO axles.......


    ^I think this info would be good to know in this thread.
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  4. #4
    working on it
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    This is for manual transmissions. I don't know much about the auto stuff, but if anybody else does, post it up in this thread!

  5. #5
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    Default

    For SR20 AUTO. trannies.

    1. LSD vs. Non LSD, driver side is different.

    2. Passenger sides are the same.

    Hope this helps. If I'm wrong, someone please correct me. Positive this info. is correct.

  6. #6
    Turbo Nut.
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    good write up on the differences
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  7. #7
    Ste-(f)-en
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    sweet! mine b14 tranny in my b13 is an LSD

    i never knew how to tell, thanks for the information.

    can anyone list any comparisons strength wise between the b13 and b14 transmissions?

  8. #8
    Rob
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    i dont think there is any difference although the 5th gear shift fork was changed so thats why 5th gear popouts rarely happens on b14s

    Quote Originally Posted by stephenjk13 View Post
    .

    can anyone list any comparisons strength wise between the b13 and b14 transmissions?

  9. #9
    Turbo Nut.
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    Quote Originally Posted by Rob View Post
    i dont think there is any difference although the 5th gear shift fork was changed so thats why 5th gear popouts rarely happens on b14s
    correct i think the only differences would come if you reinforeced the internal components like with whay JGY does
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  10. #10
    Performance+Plus
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    http://www.sr20forum.com/drag-racing...-new-pb-2.html

    check the pic of the tranny on page 2, good to have in this write up as well...

  11. #11
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    this is great info, ive always wondered the difference as i havent seen a non lsd transmission
    93 se-r. gt2871rs .86. sti injectors @ 4bar, jwt ecu, z32 maf, 3 inch turboback vrs exhaust, jwt s4 cams, 15lbs of fun

  12. #12
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    Just to contribute a little more here, notice how the axle seal on the LH for both trannies are different. The LSD tranny uses a larger OD seal than they NON LSD tranny. The seals on the NON LSD tranny are the same on both sides, while the LSD tranny uses different size seals.
    Jorge

  13. #13
    SHIFT_NEW YORK
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    I wish i had this info a few months ago i boght a non lsd gear box from a forum member we both clueless about the LSD to the non LSD that mistake cost me $500 and believe me i have learned,I now wana know how to take off the busted bell housing i am gona buy a brand new one soon and have it reinforced and have the 5th gear pop fixed,the dealer told me a brand new gear box will set me back $1200,So im gona try to save the one that i got now,I also got my eye on the B15 gear box (more top end) but have not much info on its weakness.
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  14. #14
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    Quote Originally Posted by BROOKLYN NX View Post
    I wish i had this info a few months ago i boght a non lsd gear box from a forum member we both clueless about the LSD to the non LSD that mistake cost me $500 and believe me i have learned,I now wana know how to take off the busted bell housing i am gona buy a brand new one soon and have it reinforced and have the 5th gear pop fixed,the dealer told me a brand new gear box will set me back $1200,So im gona try to save the one that i got now,I also got my eye on the B15 gear box (more top end) but have not much info on its weakness.
    ^Get the B15 tranny and call it a day..........It is the strongest of the B trannies and I haven't heard anything bad about it yet.......$1200 on a B13 gear box is what you are investing in? If so, why?

    --------------------------------------------------------------------------

    NOTE: Some auto trannies have kickdowns and some are electronic.........They do NOT interchange like the SR20 B13 and B14 Manual trannies do.
    Last edited by MR-4Door-SR20DET; 12-31-07 at 01:33 PM.
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  15. #15
    sqd
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    did all b13 se-r's come with LSD's?

    my tranny is at my warehouse and i keep forgetting to snap some pics of it when im there. the last time i checked though, i remember seeing the larger axle seal.

  16. #16
    NOOB since 2002
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    What about b15 p11 trannies? Is it the same
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  17. #17
    SHIFT_NEW YORK
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    $1200 is the price of a brand new b13 lsd gear box from the dealer fo some reason i did no know the b15 came with the sr20de motor if i knew that i would be looking for one just that i gota change it to hydrolic clutch.
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  18. #18
    sqd
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    Quote Originally Posted by BROOKLYN NX View Post
    $1200 is the price of a brand new b13 lsd gear box from the dealer fo some reason i did no know the b15 came with the sr20de motor if i knew that i would be looking for one just that i gota change it to hydrolic clutch.
    punctuation would be great.

  19. #19
    SHIFT_NEW YORK
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    Quote Originally Posted by sqd View Post
    punctuation would be great.
    My wife always tell me that but thanks,Il work on it
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  20. #20
    sqd
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    Quote Originally Posted by BROOKLYN NX View Post
    My wife always tell me that but thanks,Il work on it
    haha

  21. #21
    rebuilding
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    Yes its the same idea for auto trannys. I had a LSD auto trans. the LSD axles are different.
    Rob
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  22. #22
    Weekend Warrior
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    Quote Originally Posted by 2dr_sentra View Post
    Yes its the same idea for auto trannys. I had a LSD auto trans. the LSD axles are different.
    ^Who are you replying to? Do you mean the auto LSD or different from the non LSD auto axles. Also, what car are you talking about?
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  23. #23
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    I just bought an LSD Axle from Napa and it looked similar, less the center balance chunk, but would not fit into the transmission completely. It started in and then the gear teeth or main seal wouldn't clear into the last 1.5 inches of the case. So... I beat it with a sledge, thinking the clip was the issue. When I finally pulled it out again, the second brutal time; the very end of the inner spline was mutilated a bit from hitting it into the case.

    It looked like the teeth were not shaved flat enough, like the stockers were. They were too sharp on the very top and that's where they got clipped going in, almost as if the diameter was slightly wrong or the teeth depth was not cut properly. It was way too cold to screw with it, in the first place.

    Finally, I used parts from both the new and the old and ended up with a good axle, but what a mess. I do know the axle came from CT, and was new, not rebuilt. The triple bearing on the business end of the NAPA axle is not inter-changeable with the stock end spline. The clip ring does not fit, either. They are both larger than stock diameter and if you think you can just swap parts, you are wrong.

    Try to save your original axles, if at all possible or pull them with a replacement tranny. Especially the business end, no matter what transmission you use, you want that end.
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  24. #24
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    Quote Originally Posted by nismos13silvia View Post
    For SR20 AUTO. trannies.

    1. LSD vs. Non LSD, driver side is different.

    2. Passenger sides are the same.

    Hope this helps. If I'm wrong, someone please correct me. Positive this info. is correct.


    do u have any idea if the manual transmission passenger side is the same as the automatic passenger side?

  25. #25
    JDM R US
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    nm the passenger manual and auto is different...

    how bout the driver?? is the driver lsd auto the same as the manual auto???

  26. #26
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    I have ga16 auto pass axle fitted in a sr16trranny and looks pretty good. My question is, what seal should I usa scince I cant find one at the nearest auto part? Part no???
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  27. #27
    SR20VE-T Boost Junky!
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    I have a question I'm havin a hard time finding since I'm usin my phone for internet lol..


    I want to put a b13 lsd trans in my gf's g20 and I'm wondering if I could use a b13 lsd driver side axle or do I need a g20t axle??

    Could I make a hybrid axle using a lsd inner half an non lsd outter half??

  28. #28
    We do it big in Texas
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    You are going to need the g20t axles. The hubs have a bigger inner diameter than the sentra.
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  29. #29
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    My lsd axle doesnt have that cone thing on the tranny side of the driver axle. Almost looks like it helps seal?
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