3.55 or 3.73's?

With an AOD I would go either 3.73 or 4.10, I dont do any highway driving and I'll be going 4.10's this summer.

"Howard Mora" wrote in news:Ax7lc.508235$ snipped-for-privacy@twister.tampabay.rr.com:

With an AOD, you've got to go to 3.73s. That's my setup and I'm very happy with it. There's a _lot_ more pull down low because of the numerically high ratio, but it'll still cruise very happily at 85mph. Don't know about costs these days, as I did mine years ago.

At any rate, you might still have to do something on the intake side to counter the h-pipe effect. Gears will certainly help, but you still have an "unbalanced" air in/out ratio. You've affected the exhaust without considering the intake. Look into a bigger MAF and an intake. HTH.

Joe Calypso Green '93 5.0 LX AOD hatch with a few goodies Black '03 Dakota 5.9 R/T CC

I agree with Joe. I have 3.70s in my AOD Maverick and I like the way it feels. I've used 3.50s behind AODs with pleasant results and would not be afraid to go with 3.25s if HWY fuel economy was my main concern.

C8oe

Howard,

Here's how you find out what gears your car came with from the factory. Check the sticker on the inside driver's side door jam. Look at the axle code block on this sticker.

Axle codes M = 2.73s Z = 3.08s E = 3.27s

Here are my recomendations for gears:

- On your heavy convertible/automatic transmission, I'd opt for 3.73s or 4.10s.

- If it's just going to be a street car, go with the 3.73s.

- However, if it's going to be dual use -- street/strip car -- go with the 4.10s.

- Along with the gear change, change your transmission fluid and install a trans cooler and shift kit.

Gears cost about 175 bucks. Installation costs range from about $125

- $250. Make sure you get a competent person/shop to do the install!

Hope this helps. Good luck.

Patrick '93 Cobra '83 LTD

Go with 3.73s.