How much slower is a AOD than a T-5

[tireburner163]

On average how much slower is a AOD than a five-speed on stock as well as modded stangs. Is there any difference between early AOD's(1984) and later AOD's(1987-1993). How much slower is a AOD with a 2500-2800 stall than a T-5

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THE SLO PONY
1992 Ford Mustand LX. 2.3 liter four-banger, auto. Future mods: V-8 swap.
Fly it loud, Fly it proud!!!

If it ain't broke, you ain't tryin hard enough

[Unit 5302]

I'm not sure about the differences in the AOD, since I've never really considered owning one.

On average with a good driver the difference is 1/2 a second or so. With an excellent driver, you could be talking 3/4 sec or more. With the converter it'll pick the AOD up two or three tenths. Gears are also required, and a shift kit very much recommended when trying to compete with the 5spds.

[Mr 5 0]

Broad question; every Mustang (and driver) varies but generally speaking; the AOD is anywhere from one-half to a full second slower than a T-5-equipped Mustang 5.0.

An AOD with a 2500-2800 RPM stall converter (along with a shift kit and 4.10 gears) will match or beat a T-5 equipped Mustang 5.0.

in my opinion the T-5 is more fun to drive.

[tireburner163]

Ok if I take a AOD with a 2800 stall, shift kit, and 4.11's. Will it pull on a 5-speed with 4.11's or 3.73's with a good driver

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THE SLO PONY
1992 Ford Mustand LX. 2.3 liter four-banger, auto. Future mods: V-8 swap.
Fly it loud, Fly it proud!!!

If it ain't broke, you ain't tryin hard enough

[PKRWUD]

Drivers being equal, you would pull with that combonation if the 5 speed had either sets of gears. A 5 speed w/ 4.10's will either spin the tires or spend too much time shifting, and with a 2800 stall and 4.10's, you would pull hard on a 5 speed w/ 3.73's

Take care,
-Chris

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Retired Moderator
MustangNet

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[Mach 1]

I have to disagree totally. An AOD with 4.10 gears, shift kit, 2800 rpm plus stall converter, etc... will still lose to a 5 speed any day of the week.

The AOD sucks up major horsepower to operate, and is not efficient.

Are gears, converter and shift kit going to make up for the lost horsepower required to run the AOD. No way.

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1993 GT/AOD
'93 Mustang GT

[Mr 5 0]

Mach I:

The converter is the major source of power loss in the stock AOD and a 2800 RPM stall converter makes up for that (stock stall is 1600 RPM). The shift kit compensates for the AOD's lazy shifting and the 4.10's compensate for the AOD's poor gearing.

I don't know about 'pulling hard' on a 3.73-geared T-5 Mustang (with equal engine power of course) but as a T-5 driver, I would be worried if I were racing an AOD equipped Mustang V-8 with the above aftermarket parts.

That said; every Mustang and every driver is different. This is just an opinion on my part, based on observations over time.
I still think it's easier to just buy or convert to the T-5 and be done with it.

[Mach 1]

Sure, the stock converter is weak, but the transmission itself eats up power. A good converter will help make the automatic/converter combination more efficient, but it still will eat up a lot of horsepower over a 5 speed. A higher stall does not make horsepower?

I have an AOD with all above mentioned mods, and I feel like my car would pick up at least .5 second in the quarter with the 5-speed swap. You can really feel the AOD holding back the motor, at least this is my experience with my combination.

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1993 GT/AOD
'93 Mustang GT

[silver_pilate]

I totally agree with Mach 1.

In my AOD car, with all of my mods, I still have a hard time beating bolt-on improved 5.0's with T-5's. I feel exactly the same way about my tranny as Mach 1. It's holding my engine back to the tune of at least 1/2 second. And that's with converter, 3.73's and a shift kit.

On the other hand, my car will pull away from any T-5 off the line...but that's it. After that, the AOD takes too much power to turn. The T-5's are getting a good bit more power to the wheels.


Just out of curiosity...how much better would a C-4 be in comparison to a AOD??

--nathan

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'91 GT, 306, 1087 cam, 70mm TB, 76mm MAF, RPM intake, ported Windsor Jr. Irons, headers, Flows, AOD, PI 2800 converter, Transgo kit, and 3.73's. Best ET/MPH: 14.595 @ 94.41 (3400 ft altitude = 13.99 @ 98.54 @ sea level).

Check out my site

[Mach 1]

what the f--- is going on here? AFter I type my lengthy reply, it disapears before I can hit "submit reply". Its happened twice on different posts.

Anyway, a c-4 is much more efficient at transfering power than the AOD, as well as much lighter, but you lose the 4th gear for street duty, which allows lower rear end gears.



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1993 GT/AOD
'93 Mustang GT

[dinomite]

Mach 1: if you are writing a long reply, before you send it select it all and copy it to the clipboard.

[Unit 5302]

The torque multiplication from a good converter should make up for most of the hp differential between the T-5 and the AOD, which is about 5%. The other thing to consider is the wide ratio between the AOD and the T-5's gearing.

The C-4 is about 2% worse than the T-5, sitting at about 19% loss. Putting on a lighter converter does make the tranny a little more efficient, but probably only a percent or two. (Talking out of my *** a little there)

[Jeff Chambers]

I'll jump in and play the devil's advocate here, but the AOD picked my car up to the tune of .51 seconds and more than 3mph over my T5 combination. All other things remained the same except for the addition of a Canton Pro oil pan (which couldn't have accounted for much, if any, HP gain) and the loss of about 100# in the car. As an average for the season, I picked up about six tenths and nearly 5mph which I give the Lentech AOD credit for 90% of that gain. Not only that, but I never missed a shift all season!


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Jeff Chambers
Trophy Stock #3
11.462 Seconds / 117.43 MPH
Chambers Racing Team

[Mach 1]

Im not saying the AOD, or any automatic tranny doesnt have its place in racing, as they clearly do, especially when you start making big power.

If you picked e.t. up with the AOD, great, but for the average guy, its not going to happen. Maybe your engine/chassis combination (how much power are you making?) works better with an auto, or maybe Lentech really has something special with his trannys.

The difference between an AOD and a t-5 is much more than 5%. Unit, where do you dream this crap up? An AOD probably sucks up 25-30 horsepower to operate over and above a 5-speed. If you can make this into 5%, whatever, but 30 horsepower is a big difference, where as 5% doesnt sound like so much.

And how does torque mulitiplication improvments by using a more efficient converter make up for lost horsepower required to turn the AOD internally?

The results speak for themselves. Go to the track and watch the AOD cars get waxed by 5-speed cars with engine power being equal, regardless of AOD tranny mods or rear end gearing. Its easy to armchair quarterback. The AOD is inefficient and uses lots of power. The 5-speed is not. Making the AOD shift quicker and changing gear ratios and converters does not change this. Its an improvement sure, but not enough to hang with the 5-speeds, engine power being equal.


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1993 GT/AOD
'93 Mustang GT

[Unit 5302]

Average stock cars on the dyno put down about 175hp with the AOD, and about 185-190 with the T-5. Like I said, about 5%. The general numbers that I've seen indicate about 17% T-5, 19% C-4, and 22% AOD. The more hp you put down, the more you lose.