So my metric 200 is done for... I found a chevy turbo 400... Still got the stock 307... Has anyone done this and have any advice of what extra parts i need
Want to swap th400....
- Thread starter EA's87cutty
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It will bolt in - question was asked here before under Engine / Swaps / Driveability -
th200c to th400 swap
https://gbodyforum.com/threads/th200c-to-th400-swap.18821/
th200c to th400 swap
https://gbodyforum.com/threads/th200c-to-th400-swap.18821/
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Were all TH400s dual bolt pattern? If not, you'll need an adapter plate unless it's a dual pattern or BOP trans.
Not all had dual bolt patterns.
Also, depending on how you want the kickdown switch to operate, you'll need an electrical kickdown switch for the TH400, if you care about that. If you can find a setup from a VIN 9 80s H/O or 442, you can snag the throttle pedal bracket from that. Not sure if all Cutlasses had the bracket the same. But you can mount the kickdown switch in the same spot the A/C cutoff switch was mounted. The switches look very similar to each other, but I think the kickdown is normally open switch and the a/c cutoff is a normally closed switch. I have never done this, so I cannot say for sure it would work, but it sure looks like it would.
Also, depending on how you want the kickdown switch to operate, you'll need an electrical kickdown switch for the TH400, if you care about that. If you can find a setup from a VIN 9 80s H/O or 442, you can snag the throttle pedal bracket from that. Not sure if all Cutlasses had the bracket the same. But you can mount the kickdown switch in the same spot the A/C cutoff switch was mounted. The switches look very similar to each other, but I think the kickdown is normally open switch and the a/c cutoff is a normally closed switch. I have never done this, so I cannot say for sure it would work, but it sure looks like it would.
A TH400 is a ton of extra work and parts.
A TH350 is a direct bolt-in, only a new kickdown cable and bracket are needed.
A TH350 is a direct bolt-in, only a new kickdown cable and bracket are needed.
And a TH350c would allow you to keep the lock up convertor, if that's important to you.
Where any TH400s dual bolt patterns? The only dual bolt pattern transmissions I have ever seen where the TH350s and 2004r.
I don't think there were any that I'm aware of. It's just that I don't know if 100% of them were not. Never say never when you don't know. All the TH400's I've ever dealt with were either BOP or Chevy bolt patterns. Hence the adapter plate requirement. But if there were any dual-patterns out there, I don't know of any. My main complaint with TH400 was the seemingly never-ending choices of tailshaft lengths. Sure, you could change them out, but not quickly.
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