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Thread: subaru differential?

  1. #1
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    Default subaru differential?

    hey everyone,

    i have a 74 260z in which i seem to have torn up the differential. I read on ebay that a late 90's subaru legacy has a 3.90 that will supposedly fit into a 240. Does anyone know if this is tru or if any fabrication would have to be done? And if it will fit in a 240 it would fit in my 260 right?
    thanks for your help.

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    MAD MACHINIST 1GENZED's Avatar
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    The subaru's generally use the r160 or r180 differential.
    I have heard that some of the higher output models (wrx) used an r200. (read bigbucks)
    I have never heard of anyone actually attempting it. you would be breaking new ground. please document the conversion.
    Thanx
    Ahmed
    "In the beginning the universe was created, this has made alot of people
    very unhappy and is widely reguarded as a bad move."
    Hitch Hiker's Guide

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    Any new info on this? There's a guy selling one who says the WRX wagon 160 dif is a 410 LSD direct drop in. No fabricating required, uses factory axels/driveshaft ect.

    I haven't seen/heard this anywhere else, so i want to make shure before i pick it up.

    Thanks,
    Jay

  4. #4
    PaperBoy Go240Zags's Avatar
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    Datsun 510's came with R160s from same factory as the R180s and R200s in the Zs. I hear lots of the 510 guys do the swap with the Subaru diff and I believe it can be done with the Z, but don't know the details. Try a search on this site. I think the R160 is not a strong as either the 180 or 200. I too would like to see and hear about the results if you do the swap. Lots of Subies in my area, not usually the high end models tho. Gary
    1970 240Z - 7/70 HLS30-07273
    1971 240Z - 12/70 HLS30-17821
    1972 240Z given away, then went to crusher
    1983 280ZXT sold to finance 1970
    1992 Chevy Shortbox K1500
    1999 BMW R1100GS

    Rust Never Sleeps

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    I did a tun of searching on Hybridz last night. It seems the rear will work in a Z, but you need the stub axels out of a R160 510 rear to make it work (the length/spline is slightly off with the R180 axels).

    The diff plate the driveshaft ataches to also needs to be swaped to the R180 one (must be done by a rear shop because of the new crush collar needed/correct torq specs for the pinion pre-load, ect).

    There is wide debate how strong it is though. Some say they have used it for 2+ years autocrossing with great results, others say they blew it up in a matter of months. So there's no clear consensus about it.

    I think i'm just going to save for the R200. There is wide speculation on those as well (which years are better/work, what peices you need for the swap, ect). It's very confusing.

  6. #6
    Biafra for President e_racer1999's Avatar
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    the r160 ring gear has a smaller diameter, which is technically not ideal for high torque and high horsepower applications. my friend dropped the suby r160 into his '70 and he has had no problems. he has been running an L28 with some basic bolt-on mods
    Jason King
    6/72 240Z / HLS30 89646 (Yellow)
    1996 Infiniti I30 *I finally have all Nissans again!*
    1971 510 4door (wife's car)
    IZCC Member #14186

    Quote Originally Posted by xray View Post
    As unfortunate as it may be, if you want to vintage race, go Euro....If you want to race for real, stick with the Z!

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