CY & CX 400THM: differences & similarities

**WILMASBOYL78** · #1 07-05-2005, 05:38 AM

Any th400 experts have some feedback???

thanks, wilma

**Mr70** · #2 07-05-2005, 06:40 PM

I want to say my L-78 TH400 Chevelle fitted w/4:10/F70X14 shifts from:
1-2 @ 10-15MPH.
2-3 @ 18-25MPH.
I can double check the RPM for you this week..

I see a 70 Nova L-78 w/3:55/E70X14 shifts from:
1-2 @ 7-12 MPH.
2-3 @ 18-35 MPH.

Chevy454 · #3 07-05-2005, 06:59 PM

Wilma...look at the chart at the beginning of the thread, and grab the numbers for the governor parts...see if ya can't still get those parts (maybe even from GM)...if you can, problem solved...

**Mr70** · #4 07-05-2005, 07:18 PM

The 1970 L-78 CW TH400 trans. used Governor #8626866.

rangelec · #5 09-10-2005, 06:43 AM

I just found a CW turbo 400 trans with a 6 bolt converter-supposed to be out of a 70 Z28. How much are these going for? The guy wants a grand for it-is that out of line???

**Mr70** · #6 09-10-2005, 04:10 PM

I'd buy it for that.
What's the VIN# stamped into the machined pad on the drivers side,just above the shift linkage behind the rubber boot?
Can you read the Pass. side aluminum tag as well?

**Mr70** · #7 09-11-2005, 06:38 AM

rangelec
I wanted to reply to your question in the 6-lug convertor thread about this TH400,so I thought this topic was better.
The 1970 CW is a seldom seen scarce Transmission.
1970 CW TH400 was designed for specific Solid lifter BB & SB Applications.
They were:
*Chevelle-Nova-Camaro L-78 402/375HP.
*Camaro Z/28-Nova LT-1 350/360HP Yenko Deuce.
Not knowing it's overall condition,I'd say it's worth the 1K regardless.

Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars.