Turbo 400 swap
#1
Turbo 400 swap
I am building a 550 horse 434 and puting some nitrous on it and in the past the th400 has been very good to me, and the th700 not so much. How hard would it be to switch to a th400 any and all metal fabrication is no problem I am a welder so no big deal. But any info from anyone that has done this would be very helpful and appreciated.
#2
Supreme Member
Re: Turbo 400 swap
i have heard that you can use the 200C driveshaft with the shorter of the 2wd version of the th400 trannies
and works fine
not sure on the trans mount location
cant remember if the 400 ones are further back or forward than the 700r4 ones
i know the 700r4 ones are further back than the th350/200c/250 are
i forget
good luck!
and works fine
not sure on the trans mount location
cant remember if the 400 ones are further back or forward than the 700r4 ones
i know the 700r4 ones are further back than the th350/200c/250 are
i forget
good luck!
Last edited by Randy82WS7; 01-07-2008 at 08:25 PM.
#3
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Car: 88 V6 'bird/89TBI bird/85 T/A
Engine: 2.8/TBI/TPI
Transmission: V8 T-5/700R4 x2
Axle/Gears: 3.42 open/2.73 open/ 3.27 9 bolt
Re: Turbo 400 swap
except that the TH400 uses a different yoke for the driveshaft and has no torque arm provision...and you need a different crossmember...
other than that it ought to be a piece of cake...
If you have the budget for a 434 small block on nitrous, you don't have the budget for the built 700R4 and strong rear end? I guess I can see a TH400 swap because they're tough but I like overdrive.
other than that it ought to be a piece of cake...
If you have the budget for a 434 small block on nitrous, you don't have the budget for the built 700R4 and strong rear end? I guess I can see a TH400 swap because they're tough but I like overdrive.
#4
Re: Turbo 400 swap
I have the budget for the built 700r4 but the best one i can find only hold 700 horsepower and thats about to the point i will be and i don't want to ride the fine line of breakage. And I am putting a strange 60 in the rear just curious about the tranny mount and driveshaaft
#5
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Car: 88 V6 'bird/89TBI bird/85 T/A
Engine: 2.8/TBI/TPI
Transmission: V8 T-5/700R4 x2
Axle/Gears: 3.42 open/2.73 open/ 3.27 9 bolt
Re: Turbo 400 swap
If you look to the left and click on Spohn performance they sell a nice TH400 crossmember with a torque arm mount on it. The driveshaft is a matter of measuring and going to the driveshaft shop.
#6
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Car: '82 Z28
Engine: 350
Transmission: TH400 4,000 stall
Axle/Gears: Currie 9", 4.56 gears
Re: Turbo 400 swap
200C driveshaft with a TH400 slip yoke is what I'm running. Bought a Spohn crossmember and torque arm combo for the TH400 swap. The crossmember is really low though and I'm going to be making my own.
#7
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Car: 84 z28
Engine: 355
Transmission: TH350
Axle/Gears: one wheel peel
Re: Turbo 400 swap
i used the stock crossmember for my th350....all i had to do was mill the mount slot a lil bit and made a sort of L shaped bracket that came off the x member that bolted to the torque arm
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