Found a overdrive tranny ! questions ?

[RShaips]

I found a guy who has an overdrive transmision out of an 88 IROC Camaro. I can buy this for $100.00 I want it for my 67 shortbed with a 383 stroker motor and a powerglide unit in it now. I have been told that I need to use an 87-92 700R Transmission. Will this be a good transmission to use ? Also how can I tell what transmission it is by looking at it ? I know virtually nothing about transmissions Thanks

[71swb4x4]

88 IROC did come with the 700r4. The only concern I would have is if it would hold up for very long behind the 383. I would get it rebuilt for sure, but that would probably be true for whatever tranny yuou put behind it, so that may not be a big deal to you. I will go out and take a pic of my 700r4.

Shawn

[71swb4x4]

Here is a pic of my 700r4. Its a top view, so unless its out of the car it won't help you much, but its kind of crammed int eat corner of my garage and I didn't have the room to flip it over

[71swb4x4]

One more.

[RShaips]

From what I can tell it looks like yours. I don't have it with me but I looked at it this morning. Will it be the right length ? I have heard guys talking about changing tailshafts ? thanks for the help

[71swb4x4]

They are longer.
I think 1.5 inches. I have a diagram saved on my computer. I will try to post it on here.

Shawn

[71swb4x4]

diagram

[71swb4x4]

Here is another website with dimensions too.

http://www.hotrodssuperstore.com/trandim.html

[shortymac83]

If I"m not mistaken, the 700R4 is more or less a Chevy version of the 200R4, but with a steeper 1-2 shift and a .70 OD ratio as opposed to the .67 on the 200R4's. IMO, you should go with a 200. They've got a better gear spread for smoother acceleration and can be built at least as strong as the 700's. GN guys have them running 9's. However, building either one is going to cost you some pretty money. Another thing you might want to consider is the lockup converter. According to a friend of mine that rebuilds tranny's for a living, if you use the lockup converter and don't allow it to lock up (IE, don't connect the wiring to the computer) you can toast your converter and/or your tranny. There are 2 ways to get around this - use a non-lockup converter or go with a B&M (or something similar) kit that will allow your converter to lock up once you reach a certain speed in OD. This is the way I would go, it reduces engine speed, allowing you to run shorter gears in back, as well as saving your mileage.

[Zeke]

Try this link, lots of good information on all transmissions. http://www.technicalvideos.com/what_year_700R4.phtml

[RShaips]

Thanks for the website, if the numbers on the tranny match up to a 88 700R4 I am going to buy it. Thanks

[ABHaulR]

i have a 2004r in my 72 sub, im running 40's on it and it handles every thing i can dish it. running around town i get 14-16 mpg, on the hwy i get 18-20 mpg. i have no problems with it other than i had to use a divorced tranfer case with it since the tail shaft is afived to it.
Dwayne