71 Corvette TH400 transmission specs
Thread Starter
Heel & Toe
Joined: Aug 2012
Posts: 15
Likes: 0
71 Corvette TH400 transmission specs
Hi, i need to buy a new transmission for my 71 Corvette, small block 350 Ci base coupe, 270 Hp.
I know it has a TH400, but there are many TH400 and many tork converters, with different diameters...
I need to know the specs of my TH400 (diameter, large, spins),please help
I know it has a TH400, but there are many TH400 and many tork converters, with different diameters...
I need to know the specs of my TH400 (diameter, large, spins),please help
Burning Brakes
Joined: Oct 2001
Posts: 1,241
Likes: 4
From: Okinawa Okinawa
Why do you need a new tranny? Can't get the one you have rebuilt?
I would do a search on 200-r4s. They are pretty much a direct replacement for a 400 plus they have an overdrive.
You can use your stock converter or go with a new one. I got a B&M hole shot 2100 (1800 stall).
I would do a search on 200-r4s. They are pretty much a direct replacement for a 400 plus they have an overdrive.
You can use your stock converter or go with a new one. I got a B&M hole shot 2100 (1800 stall).
Race Director
Joined: May 2006
Posts: 18,648
Likes: 2,557
Any reason why you dont have the current one rebuilt? Not sure where you are looking but if you need a used rebuilt one, there are no new ones, just stating the application should be sufficient. The spec. you are stating diameter, stall speed, etc. refer to the torque convertor not the transmission. Here is a stock convertor from autozone
http://www.autozone.com/autozone/par..._7736%2C104427
http://www.autozone.com/autozone/par..._7736%2C104427
Thread Starter
Heel & Toe
Joined: Aug 2012
Posts: 15
Likes: 0
My trans is dead... is better if i buy a new brand like a hughes or a TCI, with new tork converter (my converter could have metal inside).
I want to buy something ready to install, no complications for me because i am from Chile, my english isnt very well, i dont understand much of mechanic and here is very expensive to repair this stuffs
I want to buy something ready to install, no complications for me because i am from Chile, my english isnt very well, i dont understand much of mechanic and here is very expensive to repair this stuffs
Thread Starter
Heel & Toe
Joined: Aug 2012
Posts: 15
Likes: 0
What if i buy something like:
http://www.apsracingusa.com/content-...90_hp34_1.html
do you think is a correct one? which converter do i need? what else do i need?
http://www.apsracingusa.com/content-...90_hp34_1.html
do you think is a correct one? which converter do i need? what else do i need?
Thread Starter
Heel & Toe
Joined: Aug 2012
Posts: 15
Likes: 0
Why do you need a new tranny? Can't get the one you have rebuilt?
I would do a search on 200-r4s. They are pretty much a direct replacement for a 400 plus they have an overdrive.
You can use your stock converter or go with a new one. I got a B&M hole shot 2100 (1800 stall).
I would do a search on 200-r4s. They are pretty much a direct replacement for a 400 plus they have an overdrive.
You can use your stock converter or go with a new one. I got a B&M hole shot 2100 (1800 stall).
I want to buy something ready to install, no complications for me because i am from Chile, my english isnt very well, i dont understand much of mechanic and here is very expensive to repair this stuffs
Team Owner
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
Thread Starter
Heel & Toe
Joined: Aug 2012
Posts: 15
Likes: 0
yes, but is easy for me to buy something ready to install so i need to know if any th400 for car is ok
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Drifting
Joined: Jan 2006
Posts: 1,831
Likes: 36
From: Cedar,BC
Make sure it has the short car tailhousing and output shaft,any of the reputable builders will give you the correct one and a suitable stall converter for your needs,just give one a call, arrange payment and shipping and enjoy.Post a wanted ad on the for sale section here,one of the regulars maybe able to help you out
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
I recommend that you purchase a THM-200-4R overdrive transmission...unless you wish the car to remain exactly like it left the factory. The 200R has four forward ranges, the last one with a .67:1 drive ratio; rpms at highway speeds will be 2/3 of what they are with the THM-400. You will have to add a Throttle Valve (TV) cable and set it up correctly, and there are some minor other changes to the installation; but the benefits to driver comfort and engine 'comfort' are well worth it...not to mention an improvement in fuel mileage of 25% or more.
For activation of the lockup clutch, I suggest purchase of a lockup controller, like the one produced by Bowler (Google it). If you want a less expensive...but still effective...lockup apply method, I can send you the design I came up with. It is inexpensive, simple to install, and it is safe to use.
For activation of the lockup clutch, I suggest purchase of a lockup controller, like the one produced by Bowler (Google it). If you want a less expensive...but still effective...lockup apply method, I can send you the design I came up with. It is inexpensive, simple to install, and it is safe to use.
Last edited by 7T1vette; Jan 15, 2013 at 09:15 PM.