Re: How would you guys pursue a THM400 restoration?
Buy an instruction manual and do it yourself. I have rebuilt several automatics including a late model 4R70W Ford overdrive and they are not that difficult. You will need a large clean bench, torque wrench, retainer ring expanders, a good large vise, and possible a couple of special compressor tools for the clutch packs, which you can make yourself. If you have the special 6 lug higher stall converter and it was in good shape, I would have a transmission shop flush and clean it to remove any contaminates. They can also cut it open and install new bearings and such, but I would not go tht route unles it needed it.
If you know a technician at a local transmission shop and you trust him, have the shop do it. Take photos and document the trans so it can be verified when you get it back, and don't end up with an "exchange" TH400. If fact, I will be rebuilding a CW coded Turbo 400 from my 70 Z28 here in a few months and will probably do a story on it.
I prefer to do it myself becuase of the question of "how does it work" and the satisfaction of accomplishment. Good luck with the trans!
Paul
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70 Camaro LA Z-28 03B Citrus Green LT-1 M-40 3.73's
69 Camaro X-77 Z-28 10C Cortez Silver M-21 3.73's Deluxe Project X - SOLD
69 Camaro X-77 Z-28 01B Garnet Red w/Black top, M-20 3.73 Deluxe Houndstooth
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