What gear ratio for an Auto trans?

Discussion in '94-95 5.0 - Specific' started by ga94gt, Nov 7, 2006.

  1. ga94gt

    ga94gt Active Member

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    I have a 94 gt automatic which is my daily driver. I am wanting to put gears in it, and i was wanting to know what would be a good ratio. I am leaning more toward the 3.55. any suggestion would be helpful
     
  2. 95 Sleeper

    95 Sleeper Active Member

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    at least a 4.10
     
  3. Lightning Struck

    Lightning Struck Legend

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    3:55's are way off for a auto, nothing less than 3:73's the 4:10's would be better and 4:30's would be awesome
     
  4. 97vertstang

    97vertstang Well-Known Member

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    i wouldnt go anything more than 3.73 if u do a lot of highway driving.i had 3.73s and a auto and was tacking 3k rpms all the time .i didnt fix my speedo so i vave no idea how fast i was going but 80-90 mph.if its a cruiser or just drive around town go at least 4.10s.
     
  5. G_94_T

    G_94_T Member

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    3.73 may not be enough and 4.10 would probably be too much on a DD so i'd go with 3.90
     
  6. Lightning Struck

    Lightning Struck Legend

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    good thinking, I forgot about the 3:90's from motive gear
     
  7. ga94gt

    ga94gt Active Member

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    I have been told that the tranmissions have trouble with gears 4.10 and up. Is that true? So are yall saying that I would not benifit from the 3.55.
     
  8. CanaryGT

    CanaryGT Well-Known Member

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    3.55 arnt that great. They were sluggish with me and my 5-speed. I went to 4.10's and I may suggest you do the same. 4.10's rock, but the motive 3.90's wouldnt be a bad idea.
     
  9. SaleenStang94

    SaleenStang94 Member

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    mos def 4.10s (its what i have). 4.30s are too much gear and 3.73 is too little. dont even think about 3.55
     
  10. Lightning Struck

    Lightning Struck Legend

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    430's too much ??? ??? nooooooooooooooooooo!!!!!! :( :( :( :( :(
     
  11. 95 Sleeper

    95 Sleeper Active Member

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    They are especially a pushrod auto
     
  12. Lightning Struck

    Lightning Struck Legend

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    NEVER ;D ;D
     
  13. 95CALI-5.0

    95CALI-5.0 Active Member

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    4:10 would be fine
     
  14. Lightning Struck

    Lightning Struck Legend

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    I had them in my 98Gt and liked them just fine, not too much and not too little. :) I had 373's in a 96GT about 6 years ago, they worked well too
     
  15. Sn95Willis

    Sn95Willis Active Member

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    4.10's is the way to go.. I put 80k on my 2002 with those gears and never had any probs.....
     
  16. houston5.0jay

    houston5.0jay New Member

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    Ok im in same boat the OP is... bone stock AOD 95 GT.. and she is my DD.. but right now im miserable with the AOD... (always had 5 speed T5s before)

    so 4:10s or 3:90s are defiantly what the majority here would recomend..

    on a stock AOD does this have any negative things to worry about.. I have 2:73s in my car right now... it should be a tremendous differnce in acceleration but how about the rev range on the highway? and to get the most outa a gear changce do I have to have a shiftkit/stall installed?
     
  17. OpenRoadRacer

    OpenRoadRacer Member

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    i have been there, i had a 95GT with AODE...... with an automatic car with overdrive, the 4.10 is the best gear.

    when i got my cobra i went with 4.10's and they were too low for the cobra tranny (3.35 first gear) so i went with 3.73's for a little bit taller first gear.

    now as for your speedo, dallas mustang has a SpeedCal that will get your speedo within 1% of accurate. my odometer reads 9.9 miles after traveling 10 miles. SpeedCal is about 90 bux.

    i have heard (not confirmed) that the motive 3.90's tend to whine a little. that's why i went with the FRPP 3.73's.

    good luck!
     
  18. houston5.0jay

    houston5.0jay New Member

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    guess 4:10s is what i want then.. I dont want any whine at all.
    that sucks you gotta spend another 90 bucks for speedo =/ crapo..
     
  19. jpajkos

    jpajkos Active Member

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    4.10s with a shift kit and you will be more then happy. If in doubt please refer to my signature.
     
  20. shrades79

    shrades79 Member

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    i have 4:10's on my daily driver and love em wouldnt want anything less