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OEM Gear Ratio Chart

Discussion in '1st Gen. Tacomas (1995-2004)' started by chris4x4, Mar 1, 2015.

  1. Mar 1, 2015 at 9:28 AM
    #1
    chris4x4

    chris4x4 [OP] With sufficient thrust, pigs fly just fine. Moderator

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    4.10 gears, sliders, and lots of buttons.
    The axle code for your rig can be found on the manufacture's sticker located on the driver's side door jamb as follows:
    First digit:


    • A = 7.5" ring gear
    • B = 8" ring gear
    Next two digits:


    • 01 = 3:42
    • 02 = 3:58
    • 03 = 4:10
    • 04 = 4:56
    • 05 = 3:15
    • 06 = 3:91
    • 07 = 4.30
    Last digit:


    • A = 2 Pinion, Open
    • B = 4 Pinion, Open
    • C = 2 Pinion OEM Limited Slip
    some '98-00 models have shown a BO code of "???" on the door plate; so far this turns out to be a 3.91 gear ratio, at least for the 5sp. RZN171L-CRPDKAB with factory 31s/265s should be 4.56 with the AT.
    Edit by Ed Quinones on 10-7-05: I used to own a 99 Prerunner ext cab 2.7L with auto tranny and gear code of B07A. It came from the factory with a 4.56 gear ratio.
     
    Last edited: Jul 6, 2017
  2. Mar 1, 2015 at 11:10 PM
    #2
    MatthewMay1

    MatthewMay1 I'm an amateur professional.

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    Good info there! :thumbsup:
     
  3. Mar 1, 2015 at 11:28 PM
    #3
    neegdogdig

    neegdogdig Untrained with bad experiences go go go!

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    My 2002 2.7L taco xcab was packed with 4:20 gear ratio from the factory but i swapped mine with 5:29. Sweet mall crawl. Good info.
     
    Last edited: Mar 1, 2015
  4. Mar 26, 2015 at 1:56 PM
    #4
    ramonortiz55

    ramonortiz55 Not A Well-Known Member

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    I noticed that this was posted on the 1st gen tacomas wall.

    Would this also apply to second gens?

    What about 4runners, FJ cruisers and what not?

    Looking to start a 4runner build soon.
     
  5. Mar 26, 2015 at 3:00 PM
    #5
    roehoe72

    roehoe72 Well-Known Member

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    sketch-1427407054212.jpgI take it it is these numbers circled in red?
     
    Flyota716 likes this.
  6. Mar 26, 2015 at 3:02 PM
    #6
    Snowman

    Snowman I have a problem for your solution…

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    Yup
     
  7. Mar 26, 2015 at 3:06 PM
    #7
    roehoe72

    roehoe72 Well-Known Member

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  8. Mar 27, 2015 at 11:57 AM
    #8
    chris4x4

    chris4x4 [OP] With sufficient thrust, pigs fly just fine. Moderator

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    Only applies to first gens.
     
  9. Mar 30, 2015 at 2:27 PM
    #9
    rphass17

    rphass17 Well-Known Member

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    why would my 03 dcsb have a 4:10 compared to a buddys 96 AT ext cab with 4:56s ?
     
  10. Mar 30, 2015 at 2:28 PM
    #10
    95 taco

    95 taco Battle Born

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    Does his truck has the 4 cylinder?
     
  11. Apr 7, 2015 at 11:22 AM
    #11
    rphass17

    rphass17 Well-Known Member

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    yes
     
  12. Apr 7, 2015 at 12:16 PM
    #12
    Snowman

    Snowman I have a problem for your solution…

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    Because an engineer determined a 4.56 gear ratio would work better with a 2.7 automatic and that 4.10 would be better suited to a V6 automatic?
     
  13. Apr 28, 2015 at 12:00 PM
    #13
    beardawg

    beardawg Member

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    My 95 has 3.58's my step dads has 4.10's. both are 2.7 4wd reg cab 5spds.
     
  14. May 25, 2015 at 11:13 PM
    #14
    95babybluetaco

    95babybluetaco Active Member

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    Whats the difference between a two and four pinion setup?
     
  15. May 26, 2015 at 6:08 AM
    #15
    chris4x4

    chris4x4 [OP] With sufficient thrust, pigs fly just fine. Moderator

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    The amount of pinions in the planetary set. one has 2, the other has 4. Most all rear diffs us a 2 pinion set up.
     
  16. May 26, 2015 at 10:14 PM
    #16
    95babybluetaco

    95babybluetaco Active Member

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    Where is the planetary set located within the differential? I know there is a planetary gear set in the transfer case but am not aware of one in the diffs. Are you referring to the number of spider gears?
     
  17. May 26, 2015 at 10:31 PM
    #17
    chris4x4

    chris4x4 [OP] With sufficient thrust, pigs fly just fine. Moderator

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  18. Jul 16, 2015 at 7:30 AM
    #18
    beardawg

    beardawg Member

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    If I wanted to put 4:10's in my truck would anything have to be done to the speedometer (show correct speed)? I assume not, but I wasn't sure. I hate these 3.58's truck just feels gutless.
     
  19. Jul 17, 2015 at 2:15 PM
    #19
    Wulf

    Wulf null

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    You will have to change the speedometer drive gear in the transfer case if you change your differential ratios and keep the same tire size.
     
  20. Jul 21, 2015 at 11:04 AM
    #20
    MotoMoose68

    MotoMoose68 Well-Known Member

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    The chart seems to correlate with the code on my door jamb label. Mine reads A/TM: A04C / A750F. If I use the part in bold, it reads 7.5" diff., with 4.56 gears and Limited Slip. I looked elsewhere on the internet and couldn't find anything different, or specific to 2nd Gen trucks.
     

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