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Discussion Starter · #1 ·
i have a 2003 gmc sierra z71 with a 4l60e. i lost 3rd gear. i was told i had to change it out with another 2003 tranny because off changes in the electronics. they have 2 2002 trannys available but said they could not be swapped out with a 2003 model. anyone no if theres anyway i can use the 02 model. how much of a difference would electronic changes make? the trannys looked exactly the same
 

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Discussion Starter · #2 ·
what want a 2002 4L60e swap out with a 2003 model

why want a 2002 4L60e swap out with a 2003 model. its in a sierra z71. the 2 trannys look the same on he outside
 

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Please do not start multiple threads on same subject. Simply post in the original thread to bring it back to the top
 

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in 2003 , GM changed the mhz rating and connector on the PCS on the valve body.

I have swapped in older design (pre 2003) into newer vehicles and had no problems or codes set.

I would think swap in the newer version into older design application vehicle , would be fine too. Have veriifed that
 
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