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Thread: new gear, same E/T

  1. #1

    Default new gear, same E/T

    I've recently install a new rear end gear that was 4.10. OEM was 3.23
    I was impatient to test it to the track, so my best on last friday night was 14.64@92.18mph. Let see the difference between last year best and this year:

    last year: 60 foot = 2.112 this year with 4.10: 2.047
    330 foot = 6.078 5.984
    1/8 et = 9.377 9.309
    1/8 mph = 74.59 73.52
    1/4 et = 14.648 14.641
    1/4 mph = 93.10 92.18

    I expected a major difference like 3tenth.
    P.S:this year, i run on 26-8.5-15 e/t drag
    1.92 sec. 60 foot

  2. #2

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    Umm, your factory gear was 3.23??? I never heard of that gear being put in a dakota?
    390ci 11.13@120mph N/A

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  3. #3

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    Quote Originally Posted by Kotta390 View Post
    Umm, your factory gear was 3.23??? I never heard of that gear being put in a dakota?
    yes!!! maybe someone change it in the past but
    1.92 sec. 60 foot

  4. #4

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    Quote Originally Posted by Kotta390 View Post
    Umm, your factory gear was 3.23??? I never heard of that gear being put in a dakota?
    in the glove box it's written 3.92 but haven"t that
    1.92 sec. 60 foot

  5. #5


    nevr2fast01's Avatar
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    what rpm's are you crossing the traps? what other mods do you have? track temps? DA?
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  6. #6

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    Quote Originally Posted by nevr2fast01 View Post
    what rpm's are you crossing the traps? what other mods do you have? track temps? DA?
    5200rpm approx, s/s VB headers exhausts round air filter sct, i think that da is 1830', temperature was kind of 27'C
    1.92 sec. 60 foot

  7. #7



    1400+ 1/4 mile passes

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    Do you have the temps from last year?

    Best pass 2002 Dodge Dakota : 13.302 @ 103.39 MPH and 1/8 E.T. 8.569 @ 82.87mph

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  8. #8



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    Quote Originally Posted by moparsz View Post
    Do you have the temps from last year?
    I can be 3 tenths slower just because of the change in DA. One must keep a log.
    11.27 @ 118.23
    2017 NM Mopar Challenge Series Champion

  9. #9

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    Quote Originally Posted by moparsz View Post
    Do you have the temps from last year?
    it was colder, like 15'C maybe but i'm not sure that i will drop near 14.3
    1.92 sec. 60 foot

  10. #10



    1400+ 1/4 mile passes

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    Weather makes a hugh difference. Just the last 2 weeks with my truck ran upper 14.70's in 98 degree temp to last weekend went 14.40's in mid/low 70's

    Best pass 2002 Dodge Dakota : 13.302 @ 103.39 MPH and 1/8 E.T. 8.569 @ 82.87mph

    Drag Track http://www.youtube.com/watch?v=LCNQhtcXkKE
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  11. #11
    blackknight's Avatar
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    Now drop some nitrous in it and spray off the line!! You have to get those 60s down

  12. #12

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    are you sure i thought all dakota were 3.90

  13. #13

    DakotaNdaytona's Avatar
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    Quote Originally Posted by landbutcher View Post
    are you sure i thought all dakota were 3.90
    All R/T's are 3.92 stock,
    98 Dakota R/T DA brought back to life.


  14. #14


    Blown and Squirted

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    If you still have the beer barrel you should be able to drop down to 1.9 or 1.8 in the 60 with those gears and tires. Figure out what it likes on the launch.

    '99 R/T- MSIIextra fuel/spark/idle, ZCP mx422 supercharged, ZCP Tbrake 727, PPC 10" 3800, 4.10, (\/) Headers, 2.5" Duals, Truetrac, Boyd Timeless 6's, Hotchkis TVS.
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  15. #15

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    Quote Originally Posted by landbutcher View Post
    are you sure i thought all dakota were 3.90
    all r/t were suppose to have 3.92 but not mine!!!
    1.92 sec. 60 foot

  16. #16

    SB440R/T's Avatar
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    Did the tire size change from last year?
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  17. #17

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    Quote Originally Posted by SB440R/T View Post
    Did the tire size change from last year?
    last year i ran street tires that had 26.5in with the 3.23. this year 26in slicks with 4.10. that's the only one change neither temperature
    1.92 sec. 60 foot

  18. #18


    Blown and Squirted

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    How did you determine the stock gear ratio was 3.23?

    '99 R/T- MSIIextra fuel/spark/idle, ZCP mx422 supercharged, ZCP Tbrake 727, PPC 10" 3800, 4.10, (\/) Headers, 2.5" Duals, Truetrac, Boyd Timeless 6's, Hotchkis TVS.
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  19. #19



    grapejuice1998's Avatar
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    I get the feeling they were 3.92, which is why you didn't see much of a gain.
    3.23 would be very odd for an R/T, even taking into account "Dodge Different".
    Alan Short
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  20. #20

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    Quote Originally Posted by Five9Dak View Post
    How did you determine the stock gear ratio was 3.23?
    41 tooth ring and 14 on the ring
    1.92 sec. 60 foot

  21. #21

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    Quote Originally Posted by grapejuice1998 View Post
    I get the feeling they were 3.92, which is why you didn't see much of a gain.
    3.23 would be very odd for an R/T, even taking into account "Dodge Different".
    Mistake tooth was 45/14
    1.92 sec. 60 foot

  22. #22

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    Quote Originally Posted by Five9Dak View Post
    How did you determine the stock gear ratio was 3.23?
    It was 45/14
    1.92 sec. 60 foot

  23. #23


    Blown and Squirted

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    I guess somebody was in there before you, or the whole axle assembly was replaced at some point. Was the truck in an accident?

    '99 R/T- MSIIextra fuel/spark/idle, ZCP mx422 supercharged, ZCP Tbrake 727, PPC 10" 3800, 4.10, (\/) Headers, 2.5" Duals, Truetrac, Boyd Timeless 6's, Hotchkis TVS.
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  24. #24



    grapejuice1998's Avatar
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    Quote Originally Posted by Five9Dak View Post
    I guess somebody was in there before you, or the whole axle assembly was replaced at some point. Was the truck in an accident?
    That's probably right. I had a chevy truck back in the day with a 3.40 gear. Sent a chunk of ring gear through the case and replaced it with a junkyard rear end. It had a 3.08 gear. Man, did that ever suck.
    Alan Short
    D.R.T.C. #15


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