CRG Discussion Forum
Welcome, Guest. Please login or register.
Did you miss your activation email?
July 26, 2014, 02:20:48 PM

Login with username, password and session length
Search:     Advanced search
Welcome to the CRG Discussion Forum!
Forum registration problems: Make sure you enter your email correctly and you check your spam box first. *Then* email KurtS2@gmail for help.
102391 Posts in 12081 Topics by 4665 Members
Latest Member: 67RagTop
* Home Help Search Login Register
+  CRG Discussion Forum
|-+  Camaro Research Group Discussion
| |-+  Decoding/Numbers
| | |-+  Julian date code on THM400's in 1969 model year.
« previous next »
Pages: [1] Print
Author Topic: Julian date code on THM400's in 1969 model year.  (Read 3377 times)
nuch_ss396
Member
***
Posts: 265



View Profile Email
« on: June 09, 2008, 07:00:50 PM »

Hi Guys!

Can anyone give me a 101 level course on the use of assembly codes on THM400 transmissions during the 1969 model year?
Were these codes sequential, or Julian, or something else?

I have a CX coded THM400 with the following information:  69X - 395



Did each year start with number 1  and progress from there? What does the 395 designate?  Julian date, sequence number, etc.?
What does the 2160 designate?

Help would be appreciated.

Nuch
Logged

69 SS 396, Hugger Orange, D/80, D/90
Chambered Exhaust, N/66, THM400, 3:73 posi

Steve A.
  CRG
Ed Ernst
Member
***
Posts: 62



View Profile Email
« Reply #1 on: June 09, 2008, 07:29:55 PM »

Check this, Steve:  http://www.camaros.org/drivetrain.shtml#TransmissionNumbers
Logged

1967 SS/RS convertible  --  1969 9561 X11 RS
tom
Hero Member
*****
Posts: 1133


View Profile WWW Email
« Reply #2 on: June 09, 2008, 09:00:11 PM »

395 is not a julian date. Julian dates goes from 1 to 365. counts the days of the year.

Tom
Logged

69 X11 Z21 L14 glide
looking for a 69 export model (KPH) speedo
nuch_ss396
Member
***
Posts: 265



View Profile Email
« Reply #3 on: June 09, 2008, 10:01:09 PM »

According to the CRG link provided ( THANKS ED! ), I guess it is a Julian date code.  However, it rolls over into the next year.
So this transmission was assembled on the 29th of January 1969.  That makes sense because it came from a early March '69 L/78.

Now, the 2160 is a sequence number according to the same link.  What exactly is a sequence number?  Was it the 2,160th THM400
built that model year, or the 2,160th Turbo-Hydramatic built?  Anyone know exactly what the sequence number represents?

Steve
Logged

69 SS 396, Hugger Orange, D/80, D/90
Chambered Exhaust, N/66, THM400, 3:73 posi

Steve A.
  CRG
Ed Ernst
Member
***
Posts: 62



View Profile Email
« Reply #4 on: June 10, 2008, 10:36:06 PM »

I'm guessing here - Maybe it's the 2160th CX configured TH400 built for 69? Huh
Logged

1967 SS/RS convertible  --  1969 9561 X11 RS
Z71
Member
***
Posts: 80


View Profile WWW Email
« Reply #5 on: June 11, 2008, 04:42:41 PM »

GM's use of Julian dates would start on the first calendar day of the car model year (Jan 1, 1968 for a 1969 model)  and continue thru the end of production of parts for the 69 model.  So if parts production continued into 1969 it would be 366+x days.  Its confusing but that how the did it.

1968 was a leap year!
Logged

Mike
Owned new (and still have stashed away) LOL
1966 Impala SS396
1970 Chevelle SS454
1972 El Camino SS350
1973 Chevelle SS350
2002 Trans Am WS6 Ram Air
nuch_ss396
Member
***
Posts: 265



View Profile Email
« Reply #6 on: June 23, 2008, 05:20:13 PM »

I'm guessing here - Maybe it's the 2160th CX configured TH400 built for 69? Huh

I was wondering about that myself.  But with a late January '69 date, could Chevrolet possibly
have built and installed 2159 CX's before mine?  Were there even that many?

Steve
Logged

69 SS 396, Hugger Orange, D/80, D/90
Chambered Exhaust, N/66, THM400, 3:73 posi

Steve A.
  CRG
Pages: [1] Print 
« previous next »
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!
Page created in 0.085 seconds with 18 queries.