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post #1 of 42 Old 05-10-2010, 07:21 PM Thread Starter
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running automatic trans'

who's making about [email protected] and running an auto in a foxbody?
I am looking at converting to an auto, but I don't want a 3 speed, at least a 4speed. Contemplating even trying to figure out how to swap in the new style 5speed....

anyone...ideas?


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post #2 of 42 Old 05-10-2010, 08:08 PM
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Just go with a built c4, your rear gears should make it more drivable

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post #3 of 42 Old 05-10-2010, 08:15 PM
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What is needed to bolt up a C4...?...and who makes a good built one?

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post #4 of 42 Old 05-10-2010, 08:28 PM Thread Starter
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no desire to go C4...not very efficient, although automatics and efficiency are not a very good combo. there are better ways I feel.

if doing an AOD, AODE or 4r70W, any of them I'd get would have to be built...Does it matter what to start with then? AOD would be mechanical, the others would need electronics or a controller as well.
I want to drive the car, hell even 500 miles on a trip or something, a C4 would be a waste....

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post #5 of 42 Old 05-10-2010, 09:20 PM
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Just purchased this tranny for my new build, haven't really got to test it fully yet.


http://www.fbperformance.com/page.asp?get=41&t=Top2

1993 Notchback --- HPT60 Street Turbo Kit---512rwhp/622 [email protected]
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post #6 of 42 Old 05-10-2010, 10:27 PM
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Just purchased this tranny for my new build, haven't really got to test it fully yet.


http://www.fbperformance.com/page.asp?get=41&t=Top2
I have that same tranny. It works GREAT!!!

New build in progress: Twin Gen 2 PT6466 352

Old combo:352 single 76mm turbo, 16psi, AOD, 9.41 @ 149mph, E85, 255/50/16 MT DR, 3500lb STREET car driven everywhere.
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post #7 of 42 Old 05-10-2010, 10:57 PM
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I have that same tranny. It works GREAT!!!

That's good to know, it was quite a decesion on who to go with.

1993 Notchback --- HPT60 Street Turbo Kit---512rwhp/622 [email protected]
Cover/Feature November 2007 MM&FF Magazine
Feature Sept. 2008 Mustang Enthusiast Mag.
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post #8 of 42 Old 05-11-2010, 07:47 AM
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Nice looking trans what does it Run?...And for me i would need a 5sp stick computer because my car is already an AOD....

Turbo installed!!!!
87 GT Vert.On3 turbo making 14 psi,Trickflow TW 170cc heads,TF street heat intake,70mm TB,stock cam,1.6 roller rockers,Snow performance stage 2 meth kit,42# injectors,340 lph fuel pump,AOD,Lentech VB,electric OD 3000 stall.3.55's
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post #9 of 42 Old 05-11-2010, 08:18 AM
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Here is my 4r70w swap thread.... https://forums.corral.net/forums/show....php?t=1140497

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Prior Cars
1989 Mustang Notch - Twin Turbo - 500RWHP, 1996 Mustang Cobra, 1994 Mustang GT Vert - 408w
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post #10 of 42 Old 05-11-2010, 06:41 PM
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running automatic trans'

I'd do the swap millhouse posted up. Years ago I knew someone looking into getting a 5 speed auto out of a Mercedes to work in a fox body. No idea if that ever got past an idea or not.


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post #11 of 42 Old 05-11-2010, 08:23 PM
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aode/4r70w ftw.. 3 speeds are for race cars

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post #12 of 42 Old 05-11-2010, 08:49 PM
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Actually glides are for race cars... I've had c4 transmissons in a few stangs and a 302/c4 swap in an 88 Mazda b2200 cab plus and worked great... I've got a PA super comp with transbrake and manual reverse valve body
and 327 gears and I bet I will still get 24mpg like I did with my n/a setup a tremec 3550 and 410 gears
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post #13 of 42 Old 05-11-2010, 08:52 PM
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doubt it, in 3rd gear my motor revs like 3k at highway speeds.. OD yes please

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post #14 of 42 Old 05-11-2010, 09:01 PM
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Lol my 5spd setup I was at 3500 on the highway
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post #15 of 42 Old 05-11-2010, 09:06 PM
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Lol my 5spd setup I was at 3500 on the highway
what rear gear?

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post #16 of 42 Old 05-11-2010, 09:10 PM
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running automatic trans'

High gear in a glide is the same ratio as a C4 or C6, right? Which is the same as 4th in most 5 speeds right? Why I'd lack of OD make a transmission one or race cars? My 1972 3/4 ton Chevy had a glide in it, holy crap I had a race truck! I have owned and driven a ton of car in my life that lacked overdrive. There actually was this point in time when cars lacked that fancy smanshie stuff and we all managed to still get to our destinations.

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post #17 of 42 Old 05-11-2010, 09:10 PM
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410s that's why the 327s will counter balance the c4 and run close to same rpms at same
speed
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post #18 of 42 Old 05-11-2010, 09:18 PM
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no way in hell you will get 24mpg @3500 rpm but if thats what you want than go for it, me I like cruising at a lower rpm

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post #19 of 42 Old 05-11-2010, 09:19 PM
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High gear in a glide is the same ratio as a C4 or C6, right? Which is the same as 4th in most 5 speeds right? Why I'd lack of OD make a transmission one or race cars? My 1972 3/4 ton Chevy had a glide in it, holy crap I had a race truck! I have owned and driven a ton of car in my life that lacked overdrive. There actually was this point in time when cars lacked that fancy smanshie stuff and we all managed to still get to our destinations.
Yea long ago, their was also a time when 50hp was alot.

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post #20 of 42 Old 05-11-2010, 09:29 PM
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I got 24mpg all day long when it was a 5spd with 410s crusing s 75-80mph to and from work spent 30 on a full tank of gas and lasted all week without filling up
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post #21 of 42 Old 05-11-2010, 10:04 PM Thread Starter
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I got 24mpg all day long when it was a 5spd with 410s crusing s 75-80mph to and from work spent 30 on a full tank of gas and lasted all week without filling up
probably because you had the wrong speedo gear still installed...

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post #22 of 42 Old 05-11-2010, 10:12 PM
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Yea long ago, their was also a time when 50hp was alot.
And in a time with federally mandated 55mph speed limits.

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probably because you had the wrong speedo gear still installed...
Seriously, I can't see it happening unless he was running downhill with a tailwind both ways. Turning nearly over 2900 RPM in a 5.0 mustang on the freeway is suicide for fuel economy.
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post #23 of 42 Old 05-11-2010, 10:56 PM
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Nope don't need a speedo gear when u know exactly how many miles u drive a day for a week and when u know ur going 75-80mph by the sound of the rpms
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post #24 of 42 Old 05-11-2010, 10:58 PM
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Obviously u have never had ur cars tuned before a well tuned car can get great gas milage.. A buddy that made 610 to the tires and ran 9.98 in the 1/4 on a dart 331 and 76mm turbo got 19mpg average and that's with a powerglide and 331 gears
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post #25 of 42 Old 05-11-2010, 11:13 PM
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running automatic trans'

Federal speed limit of 55 was done in the mid 70s. Off hand my 65, 67, 92, and 87 mustangs all had transmissions without overdrive and all driven everywhere since it was all I had. The 65 made 450hp, 67 was 300hp, 92 when actually driven was 600hp and the 87 1000hp. Oh and my 72 and 82 Chevy trucks both had 350hp, same damn engine setup actually, and neither with overdrive but one was a stick shift.

It is one thing if people are just spoiled and need overdrive. But it is another to say non overdrive transmissions are for race cars.

Damn, I think more of my cars have lacked overdrive than had it.

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post #26 of 42 Old 05-12-2010, 05:46 AM
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Nope don't need a speedo gear when u know exactly how many miles u drive a day for a week and when u know ur going 75-80mph by the sound of the rpms
lol

The car stock didnt make 24 mpg on the highway, no way in hell your modified one making probably double the power turning double the rpm's is.

My car is heavily tuned, will run 9's next time out and gets nowhere near 24mpg WITH overdrive and 3.27 gears, cruising with a 14.7 afr @ 1900 rpms.

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post #27 of 42 Old 05-12-2010, 07:40 AM
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Nope don't need a speedo gear when u know exactly how many miles u drive a day for a week and when u know ur going 75-80mph by the sound of the rpms
So what your saying is you "think" you know your speed by the "sound" of the RPM'S? I'm sorry...it just doesn't work that way. If you want to know your fuel economy you need to have an accurate odometer (among other things).

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Obviously u have never had ur cars tuned before a well tuned car can get great gas milage.. A buddy that made 610 to the tires and ran 9.98 in the 1/4 on a dart 331 and 76mm turbo got 19mpg average and that's with a powerglide and 331 gears
I don't care how well "tuned" your car is, 24mpg with 4.10's at 80mph is NOT happening. If you tell me now your "buddy" is getting 19mpg at 80mph with a glide....I'm going call it too. I "could" see him getting 19mpg with a glide at 55mph....but not over.

And yes, I have had my car tuned...I actually tune it myself. I could get decent economy with my 3550 on the freeway (I haven't checked yet with my 4r70w), but only if at a steady cruise. But then again, I have more efficient heads, cam, intake along with 3.27 gears (and was only getting 24mpg average on the freeway)...and yes, it was tuned.
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post #28 of 42 Old 05-12-2010, 09:46 AM Thread Starter
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Some of us idiots on here tune stuff all day....There is a lot more to it then listening to the RPM. If you have no idea of the distance you've actually covered with the vehicle, then how do you calculate fuel economy? Maybe you're in the wrong profession.

Anyhow, I was looking for info on switching to an auto. I think I am set on that and here just confirmed that 4R70W is the way to go, its just not a weekend job like I want it to be.

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post #29 of 42 Old 05-12-2010, 09:57 AM
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I got 22mpg in my old Saleen Vorturd with 4.10 gears and it cruised around 3500 rpms on the freeway in 5th gear. I have a log book somewhere with all the fillups and mileage readings. Was a pretty static drive distance wise and the miles logged matched the logs for my truck during the same drive as well as for my old 928S. I bet had the car had a better exhaust(not shorties, cats, and flowmasters) that it could have netted 1, maybe even 2 mpg better. Now the motor in the thing was near stone stock, just some minor bolt ons and then the Vorturd.

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post #30 of 42 Old 05-12-2010, 10:09 AM
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I got 22mpg in my old Saleen Vorturd with 4.10 gears and it cruised around 3500 rpms on the freeway in 5th gear. I have a log book somewhere with all the fillups and mileage readings. Was a pretty static drive distance wise and the miles logged matched the logs for my truck during the same drive as well as for my old 928S. I bet had the car had a better exhaust(not shorties, cats, and flowmasters) that it could have netted 1, maybe even 2 mpg better. Now the motor in the thing was near stone stock, just some minor bolt ons and then the Vorturd.
You sure about that snipe? You are saying you were getting 22mpg with 4.10's @ 3500 RPM? You do realize that comes out to you cruising at 96mph...and still getting 22mpg right?
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post #31 of 42 Old 05-12-2010, 10:37 AM
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Positive, I used to cruise at 120-130mph in my 928S for the same trip. I speed by a lot and I never trusted the speedo in that Saleen until after I changed gears and speedo gear.

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post #32 of 42 Old 05-12-2010, 10:39 AM
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One thing to note on MPG, I see people a lot always guess the percentage of their freeway to city driving. I bet a lot of people would be very surprised what their average speeds end up being. My BMW I am lucky to average 30mph per tank of fuel yet the bulk of my driving is on freeways and not in traffic.

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post #33 of 42 Old 05-12-2010, 10:47 AM
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Back to the original question
4r70w and a baumann controller ftw

93 Lightning t-trim @15psi a/a intercooled,Windsor sr heads, tfsr intake, 75mm tb,full fuel sys 72lb, Fast xfi, be trans controller,built E4OD 2800 stall,1-3/4 longtubes 3" exhuast Auburn pro 87 Lx coupe (in progress) 393 stroker coated pistons/bearings built 4r70w. Rusertmachine.com
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post #34 of 42 Old 05-12-2010, 12:59 PM
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I drive 92 miles a day 5 days a week.... Fill up Monday mornings and thats the only time I fill up 83 miles a day is all freeway crusing 75-80mph


My jeep grand cherokee has the 5.9 alot bigger fuel tank and i have to
fill up 2 times a week and average of 18mpg

so that is another way I know I'm getting 20+ mpg
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post #35 of 42 Old 05-12-2010, 01:34 PM
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Poo Poo

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