[b-man]

The TH400 is the toughest transmission you can buy dollar for dollar.

I too wrestled with whether to go with a regular 3-speed auto behind my 421 or to step up to an overdrive auto. After weighing the pros and cons of both I decided to just use a tall rear end gear and use the fresh TH400 that I already had sitting in my garage.

The added cost and installation hassles just weren't worth it to me, not to mention the extra couple grand or so that any overdrive auto would have added to my hobby car budget that's already starting to break the bank as I get closer to retirement.

I think a little while after your new big-inch engine has been on the road you'll find that those 3.55s are only good for scooting around town, out on the open road the excessive RPMs will soon drive you to install a 3.07 gear set in your 12-bolt.

[Va68goat]

Thanks b-man. Depending on when my motor is going to be ready, I may switch the gears out before I receive the motor. I have tons of work left to do on the car. Still need to order a ton of parts. I hope for it to be on the road by May. It's been an awesome experience. I've never done this much work on a car in my entire life than what I've done in the last 3 months. I've photo documented every step of the way.

[Va68goat]

AG,
This trans has over miles on it by now (maybe 300 miles). Since the engine was repaired, it has about additional 60 miles. I plan on doing some work to the car this winter...just not too sure what. Thinking about doing some suspension.

HWYSTR455,
Yeah, I'm looking forward to your car being on the road. Did you get the new sensor yet?

[HWYSTR455]

I decided to try the one I got, think someone used it to test and returned it, so it either works or not. If it doesn't heat up or read properly, I will send it back for another. Summit is on board with that approach. I should know this weekend.

.