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1966 Transmission Identification

Numbers say one is 1969 the other is 1970. Look on maxwedge.com for the calendar. Did they use the same number tranny all years?
 
Thanks I tried the calendar but one comes up as a 69 and the other as a 70
 
Rusty said:
Thanks I tried the calendar but one comes up as a 69 and the other as a 70
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When you see the trans' could get a picture of pump housings straight on. Some machining is on where intake feed for the pump. Thanks
 
Chrysler didn't start using the 10,000 day calendar codes on transmissions until 1968. The trans in question is a 1966 trans, so therefore it doesn't have a 10,000 day code on it. Pre 68 had the part number and another 7 digit number. 68 and up had the part number and two four digit numbers, the first being the 10,000 day date code.
 
R/T Boy 67 said:
Chrysler didn't start using the 10,000 day calendar codes on transmissions until 1968. The trans in question is a 1966 trans, so therefore it doesn't have a 10,000 day code on it. Pre 68 had the part number and another 7 digit number. 68 and up had the part number and two four digit numbers, the first being the 10,000 day date code.
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Pretty odd then, I have two trannys from ‘64s , one has 0811 which is October 17, ‘63 the other has 0770 which would be a month or so before that. Seems like too much of a coincidence to be random and not the 10000 day calendar.
 
Same with me, I have numerous cable-shift 727's and the date codes match the year of the part number and the raised date codes on the individual parts.
 
What year did they stop using a dipstick tube that was retained to tranny with a 5/16" bolt? My 66 Charger built in late Nov. 1965 had one that I believe original to car.
 
I thought '65 was the last..... gotta go look now...
 
My 66 is bolt down, think 68 Dart I had with a 904 was bolt down.
 
R/T Boy 67 said:
That trans is 1966 only, You can't use the 10,000 day calendar on a pre 1968 trans.
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I just came across this thread, and it brings up a very interesting thing that I have never been able to totally get an answer on. So as mention 1966 and 1967 torqueflites are not dated with the typical 10,000 day calendar dates as other year transmissions. I do not know if it is an assembly plant thing or what the answer is, I just know that is you try to date them using the 10,000 day calendar you get dates that do not jive as they would be to late for the part numbers. If you also notice the assembly plant on most is and H followed by the part number then a group of 7 numbers. Other transmission are PK or J followed by the part number and two groups of 4 numbers, those seem to be the normal 10,000 day Calander dated transmissions. I have asked and mentioned this on moparts and other places over the years but never gotten an actual answer to the question. I have some pictures of different units I can post to back this up,if that would help.
Matt

2A6E6417-872B-4C6E-8A9C-BEED2D6507D1.jpeg 6068F11D-91A5-4795-AFAE-5168EDD90143.jpeg 22966928-5169-45A2-91C3-71911BE66B93.jpeg 0231763C-B70F-4C18-908C-04D5CEDBA7A1.jpeg FE032BD4-B7FF-482F-963C-E9C6E0DBA5C0.jpeg 7260C7BB-B1F0-4644-957D-3C1F7B8036D6.jpeg 3EE9781C-6D3A-4084-AEDB-943535F61365.jpeg
 
I believe that the letters before the part numbers on 67 and earlier transmissions are codes for the calendar year the trans was built in. I do not have enough info to prove this, but it seems right, on the few transmissions that I have looked at with that letter in mind. A 66 trans could have a G or an H, which stands for 1965 or 1966 respectively. A 67 trans could have an H or a J which would be 66 or 67. Starting for the 68 model year they put PK in front of the part number, which is the transmission plant. They also carried on with the other letter, for a few years, but put it after the part number. The 68 up letter does not seem to fit the calender year format on some I have looked at, but it might mean the model year. Your picture above is a 1969 trans that was built in 1968, but has an L on it which would be 1969. The problem with proving my theory on pre 68 transmissions is the only date is the casting date which is not that accurate in determining the build date.
 
R/T Boy 67 said:
I believe that the letters before the part numbers on 67 and earlier transmissions are codes for the calendar year the trans was built in. I do not have enough info to prove this, but it seems right, on the few transmissions that I have looked at with that letter in mind. A 66 trans could have a G or an H, which stands for 1965 or 1966 respectively. A 67 trans could have an H or a J which would be 66 or 67. Starting for the 68 model year they put PK in front of the part number, which is the transmission plant. They also carried on with the other letter, for a few years, but put it after the part number. The 68 up letter does not seem to fit the calender year format on some I have looked at, but it might mean the model year. Your picture above is a 1969 trans that was built in 1968, but has an L on it which would be 1969. The problem with proving my theory on pre 68 transmissions is the only date is the casting date which is not that accurate in determining the build date.
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So I posted 3 2538389 1966 hemi units all start with an H. The 2801541 was used in 67 440 HP and early 1968 cars, but also starts with an H. I have one picture of a 2801544 67 or 68 hemi trans, this one is a 67 starts with an H. The 1968 unit I have starts with a J, and has the normal 10,000 date stamping. Yes the 69 hemi case does use the PK I think that is for Kokomono plant, it and the other 70 trans are there to back up the two groups of 4 digit numbers used when they date them with the normal 10,000 day calendar. So that said the 66-67 trans I have seen and have all use the H before the part number.
Matt
 
Screenshot_20220512-162819.png
Screenshot_20220512-162819.png
Not all 66-67 started with an H. I have seen 66 transmissions with either a G or an H, and 67s with either an H or a J. I have a picture of a 67 with a J. As you can see it is in the 67 format, not 68.
 
R/T Boy 67 said:
View attachment 1284007 View attachment 1284007 Not all 66-67 started with an H. I have seen 66 transmissions with either a G or an H, and 67s with either an H or a J. I have a picture of a 67 with a J. As you can see it is in the 67 format, not 68.
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I think it is safe to say no matter what, 66/67 torqueflite transmissions are stamped/ dated in a different format than the 10,000 day calendar method.
As to how it actually works, like I say never really gotten a real answer.
Matt
 
It is not just 66 and 67 it is 62 to 67. The seven digit number after the part number is a sequential serial number that started at 0000001 in 62 and carried on year after until the end of the 67model year.
 
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