Just thinking...new transmission..
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Pro
Joined: Aug 2002
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From: New York Flemington
Just thinking...new transmission..
How hard/expensive would it be to put a new (or used..I should be saying 'diffrent') transmission in that is a 4 speed auto in replacement for my 3 speed auto? I had been planning to put 3.70 gears in, but after reading how high the rpms guys have been running with the 3 speed I don't really like that idea. I travel alot (right around 800miles/month) so I want to keep the car in good condition.
Also with the car I'm throwing a supercharger onto it soon, so a transmission that can handle higher HP would be nice.
Also with the car I'm throwing a supercharger onto it soon, so a transmission that can handle higher HP would be nice.
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Just thinking...new transmission.. (JoeZ)
How hard/expensive would it be to put a new (or used..I should be saying 'diffrent') transmission in that is a 4 speed auto in replacement for my 3 speed auto? I had been planning to put 3.70 gears in, but after reading how high the rpms guys have been running with the 3 speed I don't really like that idea. I travel alot (right around 800miles/month) so I want to keep the car in good condition.
Also with the car I'm throwing a supercharger onto it soon, so a transmission that can handle higher HP would be nice.
Also with the car I'm throwing a supercharger onto it soon, so a transmission that can handle higher HP would be nice.
:cheers:
Olivier
Thread Starter
Pro
Joined: Aug 2002
Posts: 547
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From: New York Flemington
Re: Just thinking...new transmission.. (GrandSportC3)
no..I want to keep it all automatic. I have a shift kit in the 3spd and really enjoy that...it's great for daily driving around town. I would like this exact same setup but an additional gear to lower them all plus one for highway. know what I mean?
Instructor
Joined: Nov 2001
Posts: 231
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From: Burlington NC
Re: Just thinking...new transmission.. (JoeZ)
There's several threads right now concerning this.
http://forums.corvetteforum.com/zerothread?id=357456
Several resouces sell good 2004r's if you want one used, I've been told to look for them in this order:
86-87 Grand National
89 Anniversary Trans Am
86-87 Monte Carlo
85-87 Olds 442
83-84 Hurst Olds
Only buy tranmissions produced after 1/84 and to avoid 88
The 90's from Caddies are also supposed to be okay, they include all the technical updates.
http://forums.corvetteforum.com/zerothread?id=357456
Several resouces sell good 2004r's if you want one used, I've been told to look for them in this order:
86-87 Grand National
89 Anniversary Trans Am
86-87 Monte Carlo
85-87 Olds 442
83-84 Hurst Olds
Only buy tranmissions produced after 1/84 and to avoid 88
The 90's from Caddies are also supposed to be okay, they include all the technical updates.
Safety Car
Joined: Jan 2001
Posts: 3,990
Likes: 0
From: No longer a member
Re: Just thinking...new transmission.. (JoeZ)
Joe- this should help you out, a 200r4 or 700r4 will work and both are not hard conversions they just require a little thought before you start. I have a fairly stout 383 and a 700r4 and have no problems. If you'd like to check it out I'll email you my number and I'll probably be down in Venice sometime next week.
700r4 conversion
700r4 conversion
Thread Starter
Pro
Joined: Aug 2002
Posts: 547
Likes: 0
From: New York Flemington
Re: Just thinking...new transmission.. (C3 Shark Tank)
I have alot of work to do first on it...I was just thinking/dreaming of what else I would have to do. There is plent, however, that I'll probably need help with on the vette. How far away do you live?
Le Mans Master
Joined: Mar 2002
Posts: 7,456
Likes: 2
From: Coming home from Luckenbach Texas
Re: Just thinking...new transmission.. (JoeZ)
Don't dream about this one! Remember that Chevy started putting 4-speed autos in Vettes starting in '81. And there's a reason why...quite frankly it should have been done years before that, but in the 70s most automakers were trying to get emissions under control. Then when CAFE gas mileage limits hit, they had no choice but to start installing the OD autos. Before that the autmakers were simply too darn cheap to stick them in! :yesnod:
Race Director
Joined: Apr 2002
Posts: 11,485
Likes: 1
From: Far side of the Moon
CI 4-5-6-7-8 Veteran
St. Jude '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-16-'17
Re: Just thinking...new transmission.. (JoeZ)
If you gotta replace the existing tranny I certainly would recommend an upgrade to a 4 speed auto.
In the restoration of my 73, I kept the 3 speed auto cause it was one of the first thing to replace and I didn't know any better. That was over 2 years ago and I wish I knew how easy the upgrade would be...
Easy being the from the experiences and testimonials of the folks here on the forum that made the switch. Hint hint :yesnod: :yesnod:
Good luck... :cheers:
In the restoration of my 73, I kept the 3 speed auto cause it was one of the first thing to replace and I didn't know any better. That was over 2 years ago and I wish I knew how easy the upgrade would be...
Easy being the from the experiences and testimonials of the folks here on the forum that made the switch. Hint hint :yesnod: :yesnod:
Good luck... :cheers:
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