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th400 differences

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hello,

 so my 70 monte ss has a th400 that has a tag with CD and believe I am supposed to have CR. my question what makes them different?

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Not sure with th400 but for example depending on the letter suffix of a 200r4 the valve body, servo, band and such were different.

I would say the same for the th400 and th350 also. 

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It looks like the CD transmission in your car is correct. The CR code fits the Chevelle, Camaro and Nova. Use the link to refer to all years:

http://www.tpocr.com/chevrtc.html

AUTOMATIC
TRANSMISSION IDENTIFICATION

 
 

CHEVROLET

1970

V8-350 Corvette

CK

V8-400

CA

V8-400 Chevelle, Monte Carlo

CD

V8-400 Chevrolet, Camaro,Nova

CF

V8-400 Chevelle, Camaro,Nova

CW

V8-454 Police

CG

V8-454

CB

V8-454 Chevelle, Camaro,Nova

CR

V8-454 Chevelle, Monte Carlo, Corvette

CS

V8-454 Chevelle,Camaro, Corvette

CY



 

 

 
   

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Ummmm. Even more important than the letter code on the tag, does it have the VIN number stamped on the transmission???

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Where do you find the VIN on the transmission?

3 hours ago, MC1of80 said:

Ummmm. Even more important than the letter code on the tag, does it have the VIN number stamped on the transmission???

 

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Yes I guess I read your post wrong, you have a 454. Not sure what the difference would be, maybe different shift points. Maybe someone else can tell us.

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13 hours ago, MC1of80 said:

I believe the VIN is on the driver's side above the selector lever/bracket. 

Thanks!

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