anyone running a TH350C?

[PotvinGuy]

The 350C is a tranny/torque converter combo that was made by GM in the early 1980's. The TC was lockable, usually by a vacuum switch and speed sensor. B&M still makes a box to lock it by road speed. It sounds like a great combo for a lightweight bucket with a big motor. Normally you need to use a TC with a high stall speed, but that will always be slipping, reducing mileage and adding heat to the tranny.

So has anyone used this setup? Or have any info?

 

[Indycars]

The 350C is a tranny/torque converter combo that was made by GM in the early 1980's. The TC was lockable, usually by a vacuum switch and speed sensor. B&M still makes a box to lock it by road speed. It sounds like a great combo for a lightweight bucket with a big motor. Normally you need to use a TC with a high stall speed, but that will always be slipping, reducing mileage and adding heat to the tranny.

So has anyone used this setup? Or have any info?

Sounds like a good idea to me. I don't know how you could go wrong with a lockup torque converter. Is it the same size as a TH350??? If you are still in the build stage, then maybe a overdrive transmission would be a good way to go.

Good to see someone else from Oklahoma!!!


Rick

 

[Hotrod46]

I ran one in my 46 for about 2 years. The lockup function worked very good when I was running 2.75 gears in the rear. When it locked up, it sounded like you caught another gear.

Later, I swapped to 3.25's and it didn't make as much of a difference since the engine RPM's were so much higher and there wasn't as much slippage. This is the reason lockup is a good idea with a 700R4.

The 350C is not considered to be as strong as a standard 350. When I put a 383 in the car, I went with a regular TH350.

By the way, I haven't had much luck with the vacuum switches. If they're not adjustable so that you can tune them to your car wieght and vacuum level, they can cause the converter to lock and unlock rapidly under certain conditions. All you really need is a brake switch to unlock the unit when you apply the brakes.

Mike

 

[Screaming Metal]

The 350C is a tranny/torque converter combo that was made by GM in the early 1980's. The TC was lockable, usually by a vacuum switch and speed sensor. B&M still makes a box to lock it by road speed. It sounds like a great combo for a lightweight bucket with a big motor. Normally you need to use a TC with a high stall speed, but that will always be slipping, reducing mileage and adding heat to the tranny.









So has anyone used this setup? Or have any info?

Hey PG, try out the Compushift from these folks.....we put one behind a 1500 horse street motor....it was more fun than should be allowed by law! hee-hee.....burnout city. We went thru a set of rear tires in a weeks time....but it sure was fun! Check em out.....
http://www.phoenixtrans.com/html/gmtrans.html
And you can have the computer trans control on your non computer hi horse motor!!!! They sell the controller seperately, if-you-want.....

 

[Buster]

I ran one in my 46 for about 2 years. The lockup function worked very good when I was running 2.75 gears in the rear. When it locked up, it sounded like you caught another gear.

Later, I swapped to 3.25's and it didn't make as much of a difference since the engine RPM's were so much higher and there wasn't as much slippage. This is the reason lockup is a good idea with a 700R4.

The 350C is not considered to be as strong as a standard 350. When I put a 383 in the car, I went with a regular TH350.

By the way, I haven't had much luck with the vacuum switches. If they're not adjustable so that you can tune them to your car wieght and vacuum level, they can cause the converter to lock and unlock rapidly under certain conditions. All you really need is a brake switch to unlock the unit when you apply the brakes.

Mike