82 Diff F303 = 3.72 engine code but no diff markings?

Results 1 to 9 of 9
  1. #1
    CelicaSupra.com Member
    Join Date
    May 2019
    Posts
    156

    82 Diff F303 = 3.72 engine code but no diff markings?

    So I am pulling the rest of the stuff off a 82 Supra im scrapping, I confirmed on the firewall its got the code F303 with a 3.72 limited slip but I cant find any codes directly on the diff itself, I was going nuts trying to find something to no avail...

  2. Remove Advertisements
    CelicaSupra.com
    Advertisements

  3. #2
    CelicaSupra.com Member Funkycheeze's Avatar
    Join Date
    Feb 2004
    Location
    Calgary, Alberta, Canada
    Posts
    2,456
    With the diff out of the car so both side shafts rotate, spin both side shafts at the same time 10 times and count the number of times the input shaft spins;

    37 and a quarter or so times, means 3.73 (actually 3.727)
    39 means 3.90
    41 means 4.10
    43 means 4.30

    It should have a sticker on the aluminum cover if it is LSD, although it can be missing on an older car.
    '84 P-type, 5spd, Super red, black/grey leather - 2JZGTE swap, Precision 6262 on cast manifold, ECUmaster black with 875cc/min injectors, 465 WHP at 17 psi, built R154 with OS Giken twin plate, one piece driveshaft with 1310 joints, Truetrac with 3.73 R&P, 450 lb/in front coilovers, 300lb/in rear springs, Image BBM wheels 17x8 and 18x10, 4 corner BBK, AGX shocks, Whiteline bars, poly bushings, T3 GTX2 front control and steering arms etc. etc.

  4. #3
    CelicaSupra.com Member
    Join Date
    May 2019
    Posts
    156
    Quote Originally Posted by Funkycheeze View Post
    With the diff out of the car so both side shafts rotate, spin both side shafts at the same time 10 times and count the number of times the input shaft spins;

    37 and a quarter or so times, means 3.73 (actually 3.727)
    39 means 3.90
    41 means 4.10
    43 means 4.30

    It should have a sticker on the aluminum cover if it is LSD, although it can be missing on an older car.
    Dam bro that's awesome your like the mighty supra book of wisdom lol... I really appreciate that im going to give it a go, the diff appears like it was never removed so hopefully its the correct one

  5. Remove Advertisements
    CelicaSupra.com
    Advertisements

  6. #4
    CelicaSupra.com Member AJ's Avatar
    Join Date
    Mar 2003
    Location
    SF Bay Area
    Posts
    7,370
    F303 = 3.727...if the last digit is a 3 = LSD

    https://www.celica-gts.com/resources...ial_codes.html
    Regards,
    Arch
    '86 Supra MA67
    Brullen 2.5" Exhaust, HKS Fly w/7MGE clutch,ST Springs, RC Intake & TB, 2.8GT & XX emblems, Factory Add on Rear Shoulder belts, Pioneer DEH-P2000 AM/FM/CD w/CDS-P5000 CD Player, Compomotive CXNs 8x16

  7. #5
    CelicaSupra.com Member AJ's Avatar
    Join Date
    Mar 2003
    Location
    SF Bay Area
    Posts
    7,370
    IF your really lucky find a RA65 LSD 1985 GTS only... 3.90 ratio F313?? IIRC
    Regards,
    Arch
    '86 Supra MA67
    Brullen 2.5" Exhaust, HKS Fly w/7MGE clutch,ST Springs, RC Intake & TB, 2.8GT & XX emblems, Factory Add on Rear Shoulder belts, Pioneer DEH-P2000 AM/FM/CD w/CDS-P5000 CD Player, Compomotive CXNs 8x16

  8. #6
    CelicaSupra.com Member
    Join Date
    May 2019
    Posts
    156
    Quote Originally Posted by AJ View Post
    IF your really lucky find a RA65 LSD 1985 GTS only... 3.90 ratio F313?? IIRC
    How rare are those? Did they come in anything else?

  9. #7
    CelicaSupra.com Member AJ's Avatar
    Join Date
    Mar 2003
    Location
    SF Bay Area
    Posts
    7,370
    LSD fairly rare, non-LSD in most RA Celica...
    Regards,
    Arch
    '86 Supra MA67
    Brullen 2.5" Exhaust, HKS Fly w/7MGE clutch,ST Springs, RC Intake & TB, 2.8GT & XX emblems, Factory Add on Rear Shoulder belts, Pioneer DEH-P2000 AM/FM/CD w/CDS-P5000 CD Player, Compomotive CXNs 8x16

  10. #8
    CelicaSupra.com Member
    Join Date
    May 2019
    Posts
    156
    Quote Originally Posted by AJ View Post
    LSD fairly rare, non-LSD in most RA Celica...
    I now will need to start looking

  11. #9
    Junior Member
    Join Date
    Jan 2018
    Location
    Indiana
    Posts
    1
    Hello,

    Are you interested in selling the 3.72 posi rearend? Thank, Paul G (teqsupra)

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts