What gear ratio for an Auto trans?

ga94gt

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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
 

Lightning Struck

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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
 

97vertstang

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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.
 

G_94_T

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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
 

Lightning Struck

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G_94_T said:
3.73 may not be enough and 4.10 would probably be too much on a DD so i'd go with 3.90


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

ga94gt

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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.
 

CanaryGT

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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.
 

SaleenStang94

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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
 

Lightning Struck

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SaleenStang94 said:
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


430's too much ??? ??? nooooooooooooooooooo!!!!!! :( :( :( :( :(
 

95 Sleeper

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Snakebit said:
SaleenStang94 said:
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


430's too much ??? ??? nooooooooooooooooooo!!!!!! :( :( :( :( :(
They are especially a pushrod auto
 

Lightning Struck

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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
 

Sn95Willis

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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.....
 

houston5.0jay

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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?
 

OpenRoadRacer

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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!
 

houston5.0jay

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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..
 

jpajkos

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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.
 

shrades79

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

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