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63 SS
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1,225 Posts
Discussion Starter · #1 ·
Morning Team,

if I'm missing any can you add to my list of parts needed to swap back to a 3 speed auto:

-cross member
-longer drive shaft
-tranny lines?
-floor shifter linkage mods (currently running the 1st gen Shiftworks)
-kickdown cable
-TC
-
-

thanks,
Art
 

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1963 Nova SS and 1965 Nova
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435 Posts
Vacuum line to the modulator on the th350
Dipstick and tube
Torque converter hardware is usually different (metric bolts on the 700r4, standard nut and bolt on the 350)
 

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63 SS
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1,225 Posts
Discussion Starter · #6 · (Edited)
Curious why you're going back to the TH350? Race application?
I bought a level 2 from Bow Tie Overdrives with their entire set up TV made EZ (about $2700) last May and just last week it took a dump. It’s making a loud winding noise. I took it back to Bow Tie yesterday. If they get back to me that it will be another $2k to fix it I’m going back to the more user friendly 3 speed.

Also, the OD is nice but I don’t really need it for my use. I drive my car to work 1-2 a week 20 miles each way. I would just have to regear it back to 3.08s
 

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1964 400 wagon
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2 Posts
makes sense. I was wondering as I plan to start my swap from a TH350 to 700r4 this weekend. I got the Painless wiring kit and have the trans portion already installed.
 

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63 SS
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Discussion Starter · #12 ·
If you have access to a welder, it'll be pretty easy to convert your 700R4 crossmember to a TH350. I did that in mine and it was basically welding in some plate to relocate the trans mount bolts. I re-used the trans mount too.

Chris,
thanks Chris. I’ll take that into consideration
 

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1971 Chevrolet Nova 350/350
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89 Posts
1st gear sure is going to be different with the TH-350 and 3.08s vs a 700-r4 and 3.73s. I put 3.73s in a 3rd gen Camaro with a wimpy 305 and 1st gear was actually fun. I suppose, however, if you have a traction issue it may actually help.
 
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