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Re: "CY" and "CX" Question?
Wasn't the CY also the police car version too?
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Re: "CY" and "CX" Question?
Here's some docs..
http://i159.photobucket.com/albums/t...nspaper001.jpg http://i838.photobucket.com/albums/z...nspaper004.jpg http://i159.photobucket.com/albums/t...nspaper003.jpg http://i159.photobucket.com/albums/t...nspaper002.jpg 427 COPO Camaros & Novas show L-78 on their buildsheets as that's how they were assembled,and then had a 427cid. installed instead.I would think the CY trans was available in all 5 vehicle types w/Spcl. Hi-Perf 427cid. as of 4/69. |
Re: "CY" and "CX" Question?
Thanks Rick ,this if I read this right,would mean cars built after this date April 14 1969 would have received the "CY" code trans. Books are good!!Joe
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Re: "CY" and "CX" Question?
Paper reports usually came out after the act was actually being done,so I would say even a lil before April 14,1969.
They may have been installing them much earlier then that,but because my books of these are incomplete,I don't have any earlier dates on paper to share then this one.. |
Re: "CY" and "CX" Question?
my 69 07D built L-78 nova came from the factory with a CX coded trans
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Re: "CY" and "CX" Question?
457 date would be around april 3rd which would put it slightly before the April 14th date mentioned as a possible cutoff date.I have a CY dated 478 ,2 weeks after the April 14 date. If we could come up with a bunch of CY and CX dates, a cuttoff could be narrowed in on.As far as comparing the trans cutoff date to when the cars switched, that would be tough.I suppose that they could have been intermingled until the CXs were all gone, or different plants could have run out of CXs at different times.Does this make sense?
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Re: 1968 CY Trans details
Hello, not trying to piggy back on this just saw it I have a CY with the 6 bolt convertor out of a 73 Z/28 if there is any interest. Larry
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Re: 1968 CY Trans details
I would like to see s picture of the tag. If you don't want to post it here I will PM you my email.
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Re: 1968 CY Trans details
The redesigned T-400 was coded CY. These were used in the Gibb Nova's and were the first built 400's designed for competition. While not having any reference at this time to look at, I believe the documentation I have shows the CX transmission being introduced on October 24, 1968? I have heard of the CY being used in later versions, but don't know what is documented on this?
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Re: 1968 CY Trans details
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Re: 1968 CY Trans details
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Re: 1968 CY Trans details
Took a couple of pictures of an original CY transmission with an untouched identification tag with Juno date of 534.
This is out of my personal Gibb Nova. http://i211.photobucket.com/albums/b...urbo400001.jpg http://i211.photobucket.com/albums/b...bo400003-1.jpg http://i211.photobucket.com/albums/b...urbo400004.jpg http://i211.photobucket.com/albums/b...urbo400011.jpg |
Re: 1968 CY Trans details
Hello, thank-you for posting the 73 photos. Larry
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Re: 1968 CY Trans details
I was off a day in the previous post as the date the CX tranny was added. http://i211.photobucket.com/albums/b...ssionCodes.jpg |
Re: 1968 CY Trans details
<span style="font-weight: bold"> </span> Concerning the CY transmissions that came in the Gibb Nova's, there was a special bulletin sent out to GM dealerships dated July 12, 1968. It reads:
NEW HEAVY DUTY TURBO HYDRA-MATIC TRANSMISSION A new heavy duty or "high speed" version of the Turbo Hydra-Matic transmission will be available with the 425 HP 427 V-8 for Chevrolet models, the 396 375 HP Chevelle, Camaro, Chevy ll's and the 430 and 435 HP V-8 Corvette's. Previously pnly manual transmissions were available with these engines. The new transmissionincludes modifications to accept the greater engine torque, higher RPM, and generally more rigorous operation anticipated with these high output engines. To accomodate engine speeds up to 7800 RPM, 1600 RPM higher than normal operationg speeds, a special torque converter assembly is used, with all pump and turbine blades welded rather crimped in place. The converter assembly is bolted to the engine flywheel at six points, double the number of the standard unit. Because of the higher torque loads experienced during hard acceleration, premimum quality driven plate facings are used in the intermediate clutch, which is applied to accompolish the 1-2 upshift. Firmer upshifts are obtained through modifications to the accumulators in the itermediate 1-2 and direct 2-3 clutch apply circuits to reduce cushioning action. Gover calibrations are also revised to raise the maximum upshift point from 5100 to 6300 RPM. All other design details, including converter ratio and gear ratios, are common with the Turbo Hydra-Matic use with regular high displacement engines. |
Re: 1968 CY Trans details
I have a T400 1968 with a CD code. I thought it was from a BB Nova ?? If above is correct it is from a 350 2 BBL car????
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Re: 1968 CY Trans details
I have found quite a few 1968 (and possibly 1967) full size Chevrolets with this CD trans. The application I find these in is the 327 ci 275 hp. A friend has one in his shop right now that I looked at the other day. He assures me it is from a 327/275 car and he has had it for years. I believe this was before the TH350 was introduced to mass production in late 1968, early 1969. I also believe the CD code is the only common small block TH400, but there may be other small block codes.
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Re: 1968 CY Trans details
hey thank , it was realy helpfull
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Re: 1968 CY Trans details
we've lost a lot of pictures from this topic. if we could upload our pics to the site like TeamChevelles that would'nt happen.
anyone know what color the CX ink stamp is on the outside of the case? |
Re: 1968 CY Trans details
This is very hard to see but it almost looks like green:
http://i617.photobucket.com/albums/t...amera033-1.jpg |
Re: 1968 CY Trans details
what trans code would 70-ca 4684 with 317 above be? thx in advance
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Re: 1968 CY Trans details
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">what trans code would 70-ca 4684 with 317 above be? thx in advance.</div></div>
That Turbo 400 trans. came out of a 265HP/400cid. equipped 1970 Impala-Biscayne-Bel Air-Caprice,including station wagons. Trans was assembled November 13th of 1969. |
Re: 1968 CY Trans details
Found a CX from 69 Chevelle
19K448923 Got it all cleaned up and rebuild to take the place of my "CC" 68 trans for a while and go behind a L78 in the future. https://lh5.googleusercontent.com/-5...0/100_3647.JPG |
Re: 1968 CY Trans details
Nice find on the KAN VIN CX!
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Re: 1968 CY Trans details
I second that!! I have never come across a CY or CX tans in the last 20 years and certainly never seen one in that nice a condition. Congrats on the find. Hopefully you did not have to forfeit an member of your body to get it.
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Re: 1968 CY Trans details
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: SS427</div><div class="ubbcode-body">I second that!! I have never come across a CY or CX tans in the last 20 years and certainly never seen one in that nice a condition. Congrats on the find. Hopefully you did not have to forfeit an member of your body to get it. </div></div>
In the PNW a ORIG owner sale on a 50kmile CX is $700 for the core. Stuck in a ORIG owners garage floor and advertised on a piece of cardboard at a swap meet, He knew it was special He was a retired service mechanic from Camas CHEVROLET in Vancouver WA. Not sure how I did but it does not matter I purchased it to USE & ABUSE(enjoy) it (Joking)It sure likes to wind up. Silly me it is behind a L35 and a obvious missmatch. Found a CE 1967 cast L78 (From ID.) to be built at a latter date to power the 68 sometime soon. This thread was very helpfull and I am thankful for the contributors. Jim |
Re: CY & CX 400THM: differences & similarities
Can anyone tell me what car a 70 cy 353 tranny code is for?
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Re: CY & CX 400THM: differences & similarities
It originally came in either a 1970 Chevelle/Elcamino 450HP/LS-6,or a 1970 Corvette 390HP/LS-5,both equipped with a TH400 obviously.
Any other numbers on the lower pat of the tag? ..it was assembled on Saturday Dec.19th,1969. |
Re: CY & CX 400THM: differences & similarities
Thanks for the info!!
Its a short shaft, and the numbers on the bottom are 70-CY-1300 |
Re: CY & CX 400THM: differences & similarities
1300 is the serial number of the transmission.
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Re: CY & CX 400THM: differences & similarities
Looking for the application of a 65 dated T400 with CA on the tag. Thanks, Larry
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Re: CY & CX 400THM: differences & similarities
1965 Biscayne,Bel Air,Impala series with 396/325HP engine.
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Re: CY & CX 400THM: differences & similarities
Hello, thank-you.
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Re: CY & CX 400THM: differences & similarities
Does anyone have photos front and back of an original T400 6 lug convertor. Just came across one someone wrote GM 70 on seeing if it matches up. Thanks, Larry.
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Re: CY & CX 400THM: differences & similarities
Here is what I have...this is from a 1970 Nova CW TH400...original 6 lug convertor.
Hope that helps...wilma https://www.yenko.net/ubbthreads/pics..._trans_007.jpg https://www.yenko.net/ubbthreads/pics..._trans_009.jpg |
Re: CY & CX 400THM: differences & similarities
Hello, thank-you for the photos. Mine does not look like that so probably isn't GM. By the way your PM box is full tried answering that way. Larry
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Re: CY & CX 400THM: differences & similarities
What would the Pontiac version of this trans be. I have a 68 PX would it be equivilant to the CX. Thanks, Larry. 520-349-2337
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Anyone know what a CY dated 1977 is from? Would this be a service unit?
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CY coded TH400...
Last reference I see in Colvin's book is 1974...perhaps you have a service unit??
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A service Trans with notate that it is.
Look around the bellhousing for stampings like CT 123456 |
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