Re: 1968 CY Trans details
 

From some conversations I had with S/SS racer Russ Abrams, who is a Hydra-Matic employee...

[ QUOTE ]
If you have a real CX/CY converter, then look at the OD of the rear section of the converter. It should have letters such as "C" or "D". That indicates a "loose" pump. The trucks have no letters or "A". Six lug converters were used for high rpm or high torque applications. There was a special VB and governor for the CX/CY models, that information disappeared, when GM went to computers to store info. The 400 was out of production ,so the info was canned. Russ

[/ QUOTE ]

Re: 1968 CY Trans details
 

[ QUOTE ]
From some conversations I had with S/SS racer Russ Abrams, who is a Hydra-Matic employee...

[ QUOTE ]
If you have a real CX/CY converter, then look at the OD of the rear section of the converter. It should have letters such as "C" or "D". That indicates a "loose" pump. The trucks have no letters or "A". Six lug converters were used for high rpm or high torque applications. There was a special VB and governor for the CX/CY models, that information disappeared, when GM went to computers to store info. The 400 was out of production ,so the info was canned. Russ

[/ QUOTE ]

[/ QUOTE ]

Rob,

Any chance you or the gentleman you quoted have an image
of the "letters"? Were they ink stamped or punched in.

Does anyone here have an original SHP 6-lug converter that
they can check for these "letters"? I'd like to know more
about this since this is the first I'vw heard of it.

These are the kinds of details you just can't get anywhere
else. https://www.yenko.net/ubbthreads/imag...ns/worship.gif https://www.yenko.net/ubbthreads/imag...iggthumpup.gif

Steve

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.

Re: CY & CX 400THM: differences & similarities
 

DOH! Sorry nuch...just now saw the above post...unfortunately, I don't have an original CX converter...like a MORON I let one go with an L78 Chevelle I sold a few years back...sounds like I need to run over the Ray's house and get a picture of the original converter out of his '68 COPO...

Re: CY & CX 400THM: differences & similarities
 

Great !

I'll be waiting to see the picture(s) of the stamping.

Steve

Re: 1968 CY Trans details
 

Sorry it took so long, but here are some pictures of the stamping on the 6-lug converter out of my orignal CY transmission.

Re: 1968 CY Trans details
 

Attachment won't open for me..??

wilma https://www.yenko.net/ubbthreads/imag...s/confused.gif

Re: 1968 CY Trans details
 

HELP! I want to post these pic's of the stamping on the converter, but I'm having trouble. Can someone please tell me the correct way to post them? Thanks.

Re: 1968 CY Trans details
 

Kevin,

I sent you a PM.

Steve

Re: 1968 CY Trans details
 

Here are some pictures of Kevin's CY converter. https://www.yenko.net/ubbthreads/imag...ns/worship.gif

Steve

http://webzoom.freewebs.com/nuch_ss3...converter2.JPG

http://webzoom.freewebs.com/nuch_ss3...converter1.JPG

Re: 1968 CY Trans details
 

This thread is fantastic ! https://www.yenko.net/ubbthreads/imag...ns/worship.gif

Now I know exactly what converter I need to look for. Now,
all I need to do is find that needle in the haystack.....

Well, I found the CX THM400, finding one of the correct
torque converters can't be any harder, can it? https://www.yenko.net/ubbthreads/imag...lins/dunno.gif
Come-on everybody! Tell me it gets easier! https://www.yenko.net/ubbthreads/imag...s/headbang.gif

Steve

Re: 1968 CY Trans details
 

I understand that the CW Turbo 400 in a '70 Z28 has a 2400 rpm converter. Is the CW similar to the CX transmission?

Re: 1968 CY Trans details
 

Anyone know the #s and prefix for a turbo400 in a 68 Camaro 396/350hp??

Re: 1968 CY Trans details
 

Here is a pic of the CW tag on my 1970 Nova L78. Where on the case is the VIN? I never looked for it and the tranny is back in the car. Had to post pic as an attachment.

Re: 1968 CY Trans details
 

I also have a CW trans in my 70 Z-28. I found the VIN stamped on the drivers side pan rail area recessed slightly. Did not see it until the exhaust pipe was removed. The stamp was at an angle when struck.

http://i3.photobucket.com/albums/y86...6/DSCN5162.jpg

reads 0L510574.

Paul

Re: 1968 CY Trans details
 

The vin will be on the pan rail or the flange of the bellhousing.

Re: 1968 CY Trans details
 

1970 cw vin

Re: 1968 CY Trans details
 

Are you sure that's a camaro trans Looks like a nova trans because of the W in the vin???

Re: 1968 CY Trans details
 

Its a Nova trans. Not sure if Camaros are in the same position.

Re: 1968 CY Trans details
 

Sorry, I thought you were talking about your camaro trans. https://www.yenko.net/ubbthreads/imag...iggthumpup.gif https://www.yenko.net/ubbthreads/imag...mlins/flag.gif

Re: 1968 CY Trans details
 

I mistakenly thought I was responding to the post by JHS, concerning vin location. I'm not awake yet!

Re: 1968 CY Trans details
 

[ QUOTE ]
Sorry, I thought you were talking about your camaro trans. https://www.yenko.net/ubbthreads/imag...iggthumpup.gif https://www.yenko.net/ubbthreads/imag...mlins/flag.gif

[/ QUOTE ]

I am sure I confused the whole gang by interjecting my Nova CW trans. question, sorry!! I had someone ask me for a pic of my CW tag at one point so thought I would post it here for comparison purposes.

Re: 1968 CY Trans details
 

It's all good Joe! https://www.yenko.net/ubbthreads/imag...lins/beers.gif

Re: 1968 CY Trans details
 

Need help for my L78 Chevelle SS,need a cx transmission,any help or info would be great,thanks Thomas

Re: 1968 CY Trans details
 

Good luck on that one Thomas. It only took me 7 years to
find mine. https://www.yenko.net/ubbthreads/imag...lins/frown.gif Hope you're luckier than I was.

Steve

Re: 1968 CY Trans details
 

Anyone have this same info for 1972?

Re: 1968 CY Trans details
 

What is the reason for the different color tags? I have seen the same designation tags with different colors??

Thanks

https://www.yenko.net/ubbthreads/imag...lins/dunno.gif

Re: 1968 CY Trans details
 

Carl,

I thought the colors were year specific. Fo rinstance, 1969
THM400 tags were yellow. I believe 1970 tags were a light
blue/green color......

Nuch

Re: 1968 CY Trans details
 

Are some black??? or do they just look dark?

Thanks https://www.yenko.net/ubbthreads/imag...ns/worship.gif

Re: 1968 CY Trans details
 

The tag on the 70 CW coded trans was black....other applications may have used a different color....I have only seen the L78 tags...


wilma

Re: 1968 CY Trans details
 

[ QUOTE ]
Are some black??? or do they just look dark?

Thanks https://www.yenko.net/ubbthreads/imag...ns/worship.gif

[/ QUOTE ]

I'll check my database and get back to you......

Nuch

Re: 1968 CY Trans details
 

Try this for size:

( you need an ebay login for the search engine to work https://www.yenko.net/ubbthreads/imag...mlins/grin.gif)

ebay search for THM tags

Nuch

Re: 1968 CY Trans details
 

WOW,

Most of those are yellow, listed for lots of diff years!!!

Man ??? https://www.yenko.net/ubbthreads/imag...s/confused.gif https://www.yenko.net/ubbthreads/imag...s/confused.gif https://www.yenko.net/ubbthreads/imag...s/confused.gif https://www.yenko.net/ubbthreads/imag...s/confused.gif https://www.yenko.net/ubbthreads/imag...s/confused.gif

Re: 1968 CY Trans details
 

I am having an issue with my CX tranny...under partial to 1/2 throttle the Nova lights up the tires and shifts firmly into the next gear... but under heavy to full throttle around 5-6k I hear a slight squeal, then the tranny slips before it shifts into 2nd. I know it has and adjustable vacuum mod as I took a few pictures for Tom W...will an adj of this screw in or out fix this? any help out there? https://www.yenko.net/ubbthreads/imag...lins/dunno.gif

Re: 1968 CY Trans details
 

I don't think adjusting the Vac. Mod. will cure it,as it sounds more serious.
I had a similar situation and it was a clutch pack sticking.
It could also be a compression band that won't release.
1st check your fluid & filter for color & debris.

Re: 1968 CY Trans details
 

Jeff - should it be more serious I have a friend who you could trust to fix your tranny. He is in my neighborhood, is a retired GM Proving Grounds Auto Tranny expert with beauceaup experience with 400s, and an excellent reputation. He has a complete shop on his property. Let me know. Good luck.

Re: 1968 CY Trans details
 

I may pull the tranny. when I bought it, I had all the fluids changed and a tune-up. the guy changed the tranny filter and althought the fluid was old he didnt notice any fragments from the clutch pack or metal in the pan. I may contact you about your tranny man. I have also heard good things about Mike's Trans in Lancaster, Ca. thanks for both of your imputs...I was trying to avoid pulling the tranny but I guess I cant get around it.

Re: 1968 CY Trans details
 

An easy check, and probably not the case (but learned by experience), make sure you have the correct pickup tube if it has a deep pan on it...doesn't sound like a modulator problem, sounds more like a hard part...but I'm no tranny guy by any means!

Re: 1968 CY Trans details
 

[ QUOTE ]
An easy check, and probably not the case (but learned by experience), make sure you have the correct pickup tube if it has a deep pan on it...doesn't sound like a modulator problem, sounds more like a hard part...but I'm no tranny guy by any means!

[/ QUOTE ]

this may be a good lead. I noticed the ccar didnt have it's original tranny pan...it looks deeper than stock and it's finned. maybe they didnt make the adjustment on the pan depth? if this is the case, could it cause some of the problems that I'm experiencing? My buddy that did the tune-up swears these tranny are bullet proof and it had to be something simple...especially since he saw no signs of metal or clutch schmegma in the pan or filter when he changed it. I'll try it. thanks, I hope it helps.

Re: 1968 CY Trans details
 

If you have to pull it...bring it out this way. It'll give you a chance to hook up with Sam and me...heck, I'll spring for a barbeque at my place...