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I think my bad tuning had something to do with the trans commanding 3rd before the shift. While I'm sure I'll need a trans soon, I think I had the shift rpm and speed to close to the second gear...

The vehicle is a 2007 Silverado 6.0 with a 4L70E. I made some changes to the tune, not sure if it will help, just want to be sure it won't hurt things. Mainly looking to firm up shifts both upshift...

Ahh okay that makes sense. I was looking at the log as a novice and thought that as well. I'm taking it to the transmission shop in a week or so. Thanks for taking a look at things.

A log with all the trans stuff, most especially Time of Latest Shift, would be really super helpful. If it takes significantly longer to complete a shift than what's asked for in the tune, I don't...

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Attempted to change some things. The main issue with the first to second shift does seem somewhat better but your expertise would be very helpful. What its doing is it won't shift from...

Anyone? 🙏🏾

Alright here is the tune file. What I really need is the line pressure turned up. It will rev to like 3-4 grand before shifting to second even at light throttle. I think the trans is about to take a...

My truck is completely stock. The only thing I've changed on the tune is turning off DOD and unchecking the box for a cat efficiency code so it won't set a CEL. I'm getting some lazy shifts that I'd...

Just want to update the thread. Turns out my 3rd/4th gear was on its way out. The PCM would command the shift and the trans itself was slipping

Probably a dumb question, but my 3rd/4th gear went out last week. I have an appointment to get a rebuild on Thursday, but there is a big car show that I would like to go to this weekend. Its about a...

So I should lower them across the board? Thanks for the reply.

Hi so I posted about this a last week and I didn't get any replies. Not sure if I came off like a prick or something but I really need some help here. I can't get my car to shift properly under full...

Anyone willing to look at my tune? I went from a 2.73 to a 3.23. I've tried to lower the full throttle shift RPM and I've also tried to lower the shift speed. Same results. I have verified that the...