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#1
12-09-2004, 09:08 PM
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CY & CX 400THM: differences & similarities
Using a 1969 "Hydra-matic Production Parts" list, I charted the differences and similarities between the "CY" & "CX" automatic transmissions, as well the difference between the "CY" & "CX" and the standard 400 automatic transmission.
 
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#4
12-10-2004, 12:07 AM
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Re: CY & CX 400THM: differences & similarities
Rob, To help the inept, like myself which vechicles used a CY or CW and what is diff between them (CW/CY). My ORIGINAL 70 Z-28 (bought NEW) with column shifted T-400......may I assume this had either of the two???
Thanks, Chuck
__________________
Chuck Sharin [email protected] Auburn,WA (30 miles South of Seattle) 70 Camaro R/S Z-28, L-78, R/S SS 69 Camaro COPO "recreation"
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#5
12-10-2004, 02:29 AM
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Re: CY & CX 400THM: differences & similarities
For the year 1970:
*TH400 CY Trans. was coded for the LS6 Chevelle,& Corvette LS5. Higher-shift point and stronger bands & springs.I believe a thicker shaft as well? *TH400 CW Trans. was coded for the L78 Chevelle-Nova-Camaro,& LT-1 Camaro-Nova. *TH400 CR & CS Trans. was coded for the LS5 Chevelle-Monte Carlo,& Corvette w/Transitorizied Ignition. *TH400 CF Trans. was coded for the L34 Chevelle-Camaro-Nova. *TH400 CK Trans. was coded for the 300HP 350cid Corvette.
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#6
12-10-2004, 06:07 AM
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Re: CY & CX 400THM: differences & similarities
Chuck, the comparison is between the CX vs. the CY, not the CW version. The CW was used in the L78's, LT1's etc...
__________________
Marlin 70 Yenko Nova-350/360, 4speed M21, 4.10 Posi (Daddy's Ride) 69 SS Nova-396/375hp, 4speed M20, 3.55 Posi (Benjamin's Ride) 67 RS Camaro-327/250hp, 2speed Glide, & 3.08 Open (Danny's Ride)
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#7
01-26-2005, 07:36 PM
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Re: CY & CX 400THM: differences & similarities
Ray Morrison sent me some more 400-THM info. It was an application chart for 1969, so I went ahead and ran it through Excel so it's easier to digest...
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#8
09-15-2008, 06:25 AM
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Re: CY & CX 400THM: differences & similarities
[ QUOTE ]
For the year 1970: *TH400 CY Trans. was coded for the LS6 Chevelle,& Corvette LS5. Higher-shift point and stronger bands & springs.I believe a thicker shaft as well? *TH400 CW Trans. was coded for the L78 Chevelle-Nova-Camaro,& LT-1 Camaro-Nova. *TH400 CR & CS Trans. was coded for the LS5 Chevelle-Monte Carlo,& Corvette w/Transitorizied Ignition. *TH400 CF Trans. was coded for the L34 Chevelle-Camaro-Nova. *TH400 CK Trans. was coded for the 300HP 350cid Corvette. [/ QUOTE ] Would a 69 Chevelle SS L-78 be a CX code like the Camaro?
__________________
65 Corvette Coupe L78 67 427/390 Vette Coupe unrestored 67 L-79 Vette roadster (Top Flight) 69 L71 Roadster Survivor 69 L46 Roadster Survivor (Sold) 69 Z/28 RS 69 Dodge Charger R/T 70 W30 442 Auto Air Survivor 2016 Z06 Coupe M7 70 AAR Cuda (Sold) 69 L78 Chevelle
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#10
02-24-2006, 06:59 PM
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Re: CY & CX 400THM: differences & similarities
I have one of those 6-lug converters for a CY trans that I have. The letter "c" is stamped on the converter in a very small font and is located approx. 4.5 in. from the centerline of the shaft hole. I'll try to post a picture of this in the next week or so.
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