700R4/4L60 - Determining what year it is from case codes - LS1LT1 Forum : LT1, LS1, Camaro, Firebird, Trans Am, Engine Tech Forums

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post #1 of 5 (permalink) Old 04-15-2011, 06:48 PM Thread Starter
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700R4/4L60 - Determining what year it is from case codes

Here is how to year date a 700R4/4L60 transmission. It can also be used to date 4L60E transmissions if you continue the date progression. 4L60E's use the letter D as the 3rd digit of the 3 letter model code, where 700R4/4L60 uses a M. To go into the 4L60E years just go up from the 1993 code, 1994 =4 1995 = 5 etc. Just looked at 98 GM repair manual and 98 and later trans, the 1st number after the 3 letter code will be the build date of the trans. Example- if 8 is the 1st # in code for 98 model year, after the 3 letters could be a 7 or 8 for the build date.

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Last edited by cocobolo95; 04-05-2012 at 06:21 AM.
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post #2 of 5 (permalink) Old 05-02-2011, 06:42 PM Thread Starter
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Thought I would bring this back to the top once so people would see it.
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post #3 of 5 (permalink) Old 05-02-2011, 07:15 PM
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post #4 of 5 (permalink) Old 10-31-2012, 11:53 PM
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what is the torque limit on the 700r4? and does anyone know about how many miles it will start giving you problems?
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post #5 of 5 (permalink) Old 11-01-2012, 06:01 AM Thread Starter
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Don't know the torque limit, but the mileage the trans will go depends on many factors. My father's Buick had a 700R4 and it was still good at 20 years old and 180K on the odometer. On the other hand, I know of people destroying them in a few hundred miles.
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