700R4 question
Thread Starter
Instructor
Joined: May 2005
Posts: 208
Likes: 0
From: West Branch MI
700R4 question
I read in a post a while back on this board that a 700r4 is not able to be dropped from the bottom of a C3 due to it's size comparative to a TH350. I think it was mentioned the engine needed to be removed for the transmission to be installed/removed.
If I am remembering this properly, is this also the case on 80-82's? I believe 700r4's were employed in the 82's, weren't they? If so, is there a crossmember that can be used to ease tranmission installation/removal?
Also, similarly, if the overdrive trans. is used, can the lockup feature be retained, or would a non-lockup feature need to be installed?
Thanks again everyone.
If I am remembering this properly, is this also the case on 80-82's? I believe 700r4's were employed in the 82's, weren't they? If so, is there a crossmember that can be used to ease tranmission installation/removal?
Also, similarly, if the overdrive trans. is used, can the lockup feature be retained, or would a non-lockup feature need to be installed?
Thanks again everyone.
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by lg4vette
I read in a post a while back on this board that a 700r4 is not able to be dropped from the bottom of a C3 due to it's size comparative to a TH350. I think it was mentioned the engine needed to be removed for the transmission to be installed/removed.
If I am remembering this properly, is this also the case on 80-82's? I believe 700r4's were employed in the 82's, weren't they? If so, is there a crossmember that can be used to ease tranmission installation/removal?
Also, similarly, if the overdrive trans. is used, can the lockup feature be retained, or would a non-lockup feature need to be installed?
Thanks again everyone.
If I am remembering this properly, is this also the case on 80-82's? I believe 700r4's were employed in the 82's, weren't they? If so, is there a crossmember that can be used to ease tranmission installation/removal?
Also, similarly, if the overdrive trans. is used, can the lockup feature be retained, or would a non-lockup feature need to be installed?
Thanks again everyone.
i have a lockup converter on my 77 it works in 4th gear and has a brake circuit relay to disengage it when the brakes are on....i also have a switch to disengage it when i am at the bottom range of 4th gear at 30-40 mph...everything is commercially available from BTO
www.700r4.com
Thread Starter
Instructor
Joined: May 2005
Posts: 208
Likes: 0
From: West Branch MI
Thank you
Thank you for the replies. I am interested in utilizing the 700r4 in our 1980. Looks like I will need to find an '82 transmission crossmember and the rest from the link you supplied. Thanks again.
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by lg4vette
Thank you for the replies. I am interested in utilizing the 700r4 in our 1980. Looks like I will need to find an '82 transmission crossmember and the rest from the link you supplied. Thanks again.
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
check this out this is my install see posts 15,38,51,54,61
if you have questions let me know, bob
http://forums.corvetteforum.com/show...2&page=1&pp=20
if you have questions let me know, bob
http://forums.corvetteforum.com/show...2&page=1&pp=20
Le Mans Master
Joined: Aug 2003
Posts: 7,720
Likes: 12
From: Chattanooga TN
Originally Posted by bobs77vet
check out the BTO crossmember the advantage is its up high and tight to the underside of the car allowing you easy space to put a custom exhaust in.....i bet the 82 crossmember has the holes you have to go through.......
Melting Slicks
Joined: Oct 1999
Posts: 2,581
Likes: 14
From: Tolar Texas
Originally Posted by lg4vette
I read in a post a while back on this board that a 700r4 is not able to be dropped from the bottom of a C3 due to ....
Also, similarly, if the overdrive trans. is used, can the lockup feature be retained, ....?
Also, similarly, if the overdrive trans. is used, can the lockup feature be retained, ....?
The cross member is removable on your 1980 Corvette.
The cross member can be modified for use with a 700R4.
The cross member can be modified for use with dual exhaust.
A 700R4 transmission can be installed/removed from the bottom of the car.
The lock-up feature can and should be used.
http://www.jegs.com/cgi-bin/ncommerc...61&cgrfnbr=929
There is a LOT of information about the 700R4 or 2004R transmission swap. Search the CorvetteForum archives.
Research is half of the fun.
http://forums.corvetteforum.com/phot..._member05a.jpg
http://forums.corvetteforum.com/phot..._member04a.jpg
http://forums.corvetteforum.com/phot..._member01a.jpg
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Safety Car
Joined: Jun 2002
Posts: 4,135
Likes: 1
Originally Posted by lg4vette
Thank you for the replies. I am interested in utilizing the 700r4 in our 1980. Looks like I will need to find an '82 transmission crossmember and the rest from the link you supplied. Thanks again.
