66 Stang with 289 HIPO and 4.62 gears... Tranny help - Hot Rod Forum : Hotrodders Bulletin Board
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Old 12-20-2002, 11:42 AM
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Post 66 Stang with 289 HIPO and 4.62 gears... Tranny help

I am looking for a tranny upgrade from a 3 speed auto to one with AOD. I like the idea of having gears that will be great from stop light to stoplight, but still wanty to be comfortable on highway trips. (Less that 70 MPH).
What options to I have for Tranny's and how much should I be expecting to pay for one? Would love to keep gears around 4.00... thoughts?
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Old 12-20-2002, 01:31 PM
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you can buy a gear vendors overdrive unit. It bolts on the the back of the tranny kind of like a transfer case, only without a driveshaft going to the front and it has an overdrive ratio instead of an underdrive ratio. The cool thing about them is that you can split each gear in your c4, so you will have a 6 speed automatic. They can handle like 1500hp. THe bad thing is that they are $2000 and you need a shortened driveshaft.

Your other option is to buy an AOD. You will need a custom crossmember, a new flexplate, and you will need to shorten your driveshaft, and possible modify your exaust if you have long tube headers. When you put in your AOD you will need to get a TV cable to hook to the TV lever from the carburetor. THis tells the tranny when to shift instead of engine vaccum like the c4. It is absolutely imparative to adjust the cable correctly otherwise you will burn up your transmission becuase it also controlls the lubrication. Most likely, KULTULZ will post a message with a link on how to adjust it. AODs can't handle much power in the stock form, probably about 300hp in a 3200lb vehicle would be my best estimate. The stronger AODs were put in F-150s, cougars, and big lincolns and mercurys. They have a wider OD band and a different parts in the valve body. If you want your AOD to handle up to 450hp, aftermarket input shafts are a necesity, you can buy them from Art Carr and still use the other stock parts and converter. Anything above that hp wise, you will need a solid input shaft, itll handle 800hp that way but you willl need a custom converter. To build my AOD using art carr parts this is what it costs:
AOD from pick n' pull- $35
Rebuild kit- $270
Shift Kit-$90
Solid input shaft- $250
Converter to go with aftermarket shaft-$540
Deeper finned pan- $110
So, in total it cost me $1260 in parts to build my tranny. Seem expensive? Kinda, but the dudes at art carr said the rest of my car will break down before the tranny ever will.
Check out the pictures of my AOD in my photo album.

So, its up to you what you want to do in terms of an extra gear.
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Old 12-20-2002, 01:55 PM
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I have a "bolt on" overdrive unit for a C-6 (that's what it's on now anyway), I'll take $150 for it complete.
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Old 12-23-2002, 03:50 AM
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[quote]Originally posted by USMCDCC:


I am looking for a tranny upgrade from a 3 speed auto to one with AOD. I like the idea of having gears that will be great from stop light to stoplight, but still wanty to be comfortable on highway trips.<hr></blockquote>

-C4 To AOD-

[url=
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Old 12-23-2002, 05:45 AM
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Great info guys... thanks for the help.
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