So I crawled under the truck yesterday evening and spent 20 min wiping away road grime but didn't find a tag or any identifier left by whoever rebuilt the trans. I also looked for the PCM code and had no luck there either. It was a long day and I didn't have the energy to pull the pcm.
I don't need the code to order a chip do I?
Also since my 1-2 and 2-3 shifts are solid would it be possible or even recommended to leave them alone and firm up the 3-4 shift with the chip?
At this point I'm wondering if I should just leave the trans tuning alone and do a valve body later. At least then I would know what I had.
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