I've tried to figure this out,Newbe to trans tuning.I had someone look and adjust for me.But the same result.3:42 gears,2600 stall,3.75 pulley.It hits the rev limiter in 1st gear before shifting, this is with the shifter in the drive posistion.I need help.Thanx,Tom The second tune has repairedMPH settings
is this still in a vette? Your speedo data is all messed up, fix that first.
Yes it is.What is wrong with the speedo?I'll go look at it now.
Never mind, my bad. Forgot the autos had goofy data, yours is fine. WOT shifting you have a mph and an rpm, it has to meet both requirements before it will shift. Try dropping the wot shift mph a bit.
I will try that
In your WOT shift speed tables, you had the downshift speeds higher than your upshift speeds, for the 1-2 and 2-3 shifts. Don't think it will ever up shift like that. Also, you have the shift RPM too close to the rev limiter RPM.
With a stall, you'll need the RPM and speed set significantly lower to get it to shift where you want it. You won't be able to set it to say, 37 mph, if that's where the vehicle speed is when it actually needs to shift. You'll need to set it earlier that than.
Also, you'll probably need to increase the shift pressure, but I'll leave that to you.
Attachment 44829
Thank you, I will adjust that and see what happens.Should I drop my shift points 5mph?
Why don't you just try the tune I posted and see what happens?
I see it now.I didn't know you reworked my tune. I will put that in tomorrow and let you know.Thank You.Update, I tried your tune.Same problem.Another thing I will add is it shifts at 2k RPM even under very light throttle presure. I see you lowered the trans shift RPM's.
I tried your tune edcmat, still doing it.1-2,2-3 hits the rev limeter.Should I raise the fuel cut off to 6700 RPM's?
How about data logging it, and see where your MPH is at 6000 rpm? Then start adjusting the MPH and RPM lower until it shifts.
I would start by setting the speedo correctly, as your calculated gear ratio is 2.73. This also causes the Rev-Trans to be too high, and the Trans/Revs/Mile to be too low.
Return all your shift speed & TCC lock up speed tables and the speedo tables to stock. Now enter 26 & 3.42 in the tire size & gear ratio fields and click the commit button.
Russ Kemp
I Ck'd the trans oil level and fluid condition.It was down a pint.Smelled fine.Russ, I just called Dynotech with the rear end serial # it has a 3.90 gear.26" tall drag radials.I got this car not running and with no paper work.I put a new PCM in it to get it running and have been working out bugs from there.Thanx guys for all the help. Edcmat,I'm going to Data log and ck MPH after I reload tune.
I thought I would post a update on this problem.Turns out it had a 3:90 rear gear.I set it for that used autoscale and all is good.Thanx for the help Guys!!!