Which trans in 2008 z71

3414 Views 2 Replies 2 Participants Last post by torqydd, May 13, 2011

torqydd

Discussion Starter · May 11, 2011

I was poking around looking at doing to trans upgrades like some of the kits from Oregon performance trans. Was wanting to make sure that my 2008 z71 5.3 is still using the 4L60

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99'HEARTBEAT

· #2 · May 11, 2011 (Edited)

torqydd said:
I was poking around looking at doing to trans upgrades like some of the kits from Oregon performance trans. Was wanting to make sure that my 2008 z71 5.3 is still using the 4L60

To find out what Transmission you have, Go to the inside of your Glove and you will see a White Sticker.....with your Trucks Vin # and a Series of Letter's and Number's.....those are RPO Code's, in short what your Truck came with from the Factory,

You will be looking for one of the Following RPO Code's,
.....M30.........which is the 4 Speed Auto.....4L60e
.....MYC........which is the 6 Speed Auto......6L80

Edit:.....Forgot about the 3rd Transmission...RPO Code.....MYD......which is the 6 Speed Auto......6L90.

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