Found a overdrive tranny ! questions ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RShaips · 04-25-2004, 11:40 AM

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 · 04-25-2004, 11:57 AM

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 · 04-25-2004, 12:51 PM

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 · 04-25-2004, 12:52 PM

One more.

RShaips · 04-25-2004, 01:28 PM

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 · 04-25-2004, 01:33 PM

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 · 04-25-2004, 01:39 PM

diagram

71swb4x4 · 04-25-2004, 01:41 PM

Here is another website with dimensions too.

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

shortymac83 · 04-25-2004, 07:02 PM

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 · 04-25-2004, 08:42 PM

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

RShaips · 04-26-2004, 10:59 PM

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

ABHaulR · 04-27-2004, 01:46 AM

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

04-25-2004, 11:40 AM	#1
RShaips Senior Member Join Date: Jun 2002 Location: Augusta Missouri Posts: 804	Found a overdrive tranny ! questions ? 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

04-25-2004, 11:57 AM	#2
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	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 __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

04-25-2004, 12:51 PM	#3
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	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 __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

04-25-2004, 01:33 PM	#6
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	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 __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

04-25-2004, 01:41 PM	#8
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Here is another website with dimensions too. http://www.hotrodssuperstore.com/trandim.html __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

04-25-2004, 12:52 PM	#4
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	One more.

04-25-2004, 01:28 PM	#5
RShaips Senior Member Join Date: Jun 2002 Location: Augusta Missouri Posts: 804	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

04-25-2004, 01:39 PM	#7
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	diagram

04-25-2004, 07:02 PM	#9
shortymac83 hmm... Join Date: Jan 2004 Location: Culver, Indiana Posts: 1,631	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. __________________ 1983 Oldsmobile Delta 88 1967 Chevy C-10 stripper www.fcrperformance.com - wanna go...faster? talk to FCR.

04-25-2004, 08:42 PM	#10
Zeke Active Member Join Date: Jun 2002 Location: L.A. Lower Alabama Posts: 453	Try this link, lots of good information on all transmissions. http://www.technicalvideos.com/what_year_700R4.phtml __________________ 1969 C10 350 3spd 1995 GMC 3500 XC 350 dually When Thomas Edison worked late into the night on the electric light, he had to do it by gas lamp or candle. I'm sure it made the work seem that much more urgent. George Carlin

04-26-2004, 10:59 PM	#11
RShaips Senior Member Join Date: Jun 2002 Location: Augusta Missouri Posts: 804	Thanks for the website, if the numbers on the tranny match up to a 88 700R4 I am going to buy it. Thanks

04-27-2004, 01:46 AM	#12
ABHaulR Registered User Join Date: Jun 2003 Location: West Valley City, Ut Posts: 311	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 __________________ 72' GMC Suburban 10 1/2" of Lift, 40" Tires! Waiting for restoration 67' Chevy, What to do??? And Bad Ass American Bulldogs!



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