[Horseshoeing]

I found a old 2001 Mustang magazine with a overdrive add on. This works for autos and 4 speeds. If you have a 3 speed auto, you end up with a 6 speed auto. It sounds great, but I have never seen one working or know anyone that has done it. Here is a link to a place that sells the overdrive unit. I am sure that they are not the only place that sells them.

http://www.gearvendors.com/hotrods.html

[Grimmy]

Wow! That sounds fantastic. I'd be interested to know what they charge. Granted I'm still learning about rearends and gear sizes but it sounds great from where I'm sitting.

[Horseshoeing]

I looked it up some years ago and it was not cheap. I think it was cheaper to get a new T-5 with the kit to put it in.

[Grimmy]

Oh well, it's to be expected I guess.

[460brevill]

i have installed two gearvenders overdrives in a 67-69 mustangs.you can run it in auto shift or manuel shift.it dose what it says,turns a 3 speed to a six speed.it makes your low gear a lot lower and high gear a lot higher.it is a super unit.takes about 3 hours to install and you do heve to shorten drive shaft.

[Vinyl66]

i think ill stick with my 3 speed

[zers]

Yea, for that much cashey money, I'll stick with 4 speeds. Be cheaper to buy a wrecked fox and pull the tranny.

[Horseshoeing]

Cheaper it not better all the time

[FORDification]

You could always get a Borg Warner T-85 3-spd overdrive from a van or truck, and have the best of both worlds.