Gears? but in an auto

2NDTIME · Apr 7, 2006

Asking what gears to go with. I have searched and have had 3.55's in my old fox body. I have read MANY pages arguing about whats the best with a 5 speed but I have an AUTO. Have not seen much talking about autos with gear selection. Is it as vague as with a 5 speed ranging from 3.55's to 4.56's or is the selection with an auto a little easier?

I am thinking of the 3.90's or 4.10's. And I am about 75% sure I will be adding a procharger in a little less than a year. Other than that its pretty stock right now.

Green4.6GT · Apr 7, 2006

4.30s are perfect in my auto

i love them

fiveofanatic · Apr 7, 2006

Neither of my cars match yours, sorry :shrug:

My '91 5.0 automatic: 3.73

My '97 Cobra manual (duh): 4.30

I'd say 4.10 naturally aspirated, 3.73's with a power adder. Get that auto tranny built up, too.

2NDTIME · Apr 8, 2006

Green4.6GT said:
4.30s are perfect in my auto

i love them

About how fast is top speed in D (3rd) with the 4.30's? I dont want to run out of gear at the end of the track.

....What is 1st gear ratio in the aode?

tomustang · Apr 8, 2006

2NDTIME said:
About how fast is top speed in D (3rd) with the 4.30's? I dont want to run out of gear at the end of the track.

....What is 1st gear ratio in the aode?

RPM 2.84 1.56 1.00 0.70 AUTOMATIC 4.10.1
500 3 6 9 13
1000 6 12 18 26
1500 10 17 27 39
2000 13 23 36 52
2500 16 29 45 65
3000 19 35 54 78
3500 22 41 63 90
4000 25 46 72 103
4500 29 52 81 116
5000 32 58 90 129
5500 35 64 100 142
6000 38 70 109 155
6500 41 75 118 168

here's my chart

back_in_black · Apr 8, 2006

tomustang said:
RPM 2.84 1.56 1.00 0.70 AUTOMATIC 4.10.1
500 3 6 9 13
1000 6 12 18 26
1500 10 17 27 39
2000 13 23 36 52
2500 16 29 45 65
3000 19 35 54 78
3500 22 41 63 90
4000 25 46 72 103
4500 29 52 81 116
5000 32 58 90 129
5500 35 64 100 142
6000 38 70 109 155
6500 41 75 118 168

here's my chart[/QUOTE

Tom, not to hijack the thread, but do you have a chart on 4.10's in 04 auto

007 · Apr 8, 2006

3.73s blown, 4.10s NA

Cantslowdown · Apr 8, 2006

I am going to go with 3.73s.Just want to car to be really streetable and dont want to lose to much mpg..

007 · Apr 8, 2006

Cantslowdown said:
I am going to go with 3.73s.Just want to car to be really streetable and dont want to lose to much mpg..

I didnt lose any mpg. If you are NA thats a bad decision.

4.10s are perfect NA. If I had 3.73s I'd pay it all again to switch em for the 4.10s, no question.

Cantslowdown · Apr 8, 2006

I could see hwy mpg going down some..

007 · Apr 16, 2006

Cantslowdown said:
I could see hwy mpg going down some..

IT DIDNT.

triggz · Apr 16, 2006

4.10 is the perfect ratio for an auto. itll put you right at the top of 3rd at the traps.

03greygt · Apr 16, 2006

gears

I think if you are going to install a procharger, you need 3.55's or 3.73's at the most. Just my opinion. I have a set of both for sale. I have 3.55's and 3.73's. The 55's have about 1500 miles on them and the 73's have about 5000 miles on them. Both ford gears and installed at local ford dealership. If interested, email me at [email protected].