2-3 shift is not shifting please help!!!!! tune is in attachments

[Travose21]

i am a newbie on this site. i know how to tune a little bit. but the car was tune by a tuner i rather not say. car has 4.10 gears and 28 inch hoosier slick. if i dead hook the car it dont get 2-3 shift it hits rev limiter but if i spin it gets 2-3 shift. some please help

[DrkPhx]

Can you post a log with the problem? It could be the WOT 2>3 rpm and mph tables. Why is the 2>3 WOT shift rpm set to 5600 and the 1>2 set to 6400?

[DrkPhx]

Are you running Nitrous? What are the mods on the car? The fuel cut off (rev limiter) is set to 7000 rpm.

[Taz]

Hello Travose21,

I took at quick look at your tune ... couple of things standout. There are rules of "parity" for upshift / downshift speeds - the upshift speed must be greater than the downshift speed. This also applies to TCC apply / release speeds - apply must be greater than release.

In your tune the WOT 1>2 and 3>4 upshift / downshift speeds follow this parity - but the WOT 2>3 upshift / downshift speeds do not. D0930 to D0932 values must be less than their corresponding D0915 to D0917 values - these are reversed in your tune.

I didn't look at your PT upshift / downshift tables - but they must also follow this rule of parity. Also, you have 2 OOR errors - D0702 & D0703 - these are set to 96.0 (which is the maximum allowable) - try resetting these to 95.9 - and resaving the tune file.

If these changes don't correct the 2>3 WOT shift issue - then as DrkPhx stated - a log of the problem would be helpful.


Regards,
Taz

[Travose21]

Yall or so helpful. Taz I'm bout to do what u just said and see. But i just put it that low to c if it would shift and it didn't. So I'm bout to load up my efilive and imput data like stated and go from there hey taz can u call me 504-228-4017 Travis

[Travose21]

I want the car to shift at 6200-6400 car is a 01 trans am yank 3600 stall with 4.10 gears. Heads cam no nos. All motor. All boltons and a ls1

[Travose21]

i revised it and tell me what yall think before i try it click>>>>>>>>>>>>>>>>> minnie motor.tun

[Taz]

OK ... fixed the OOR (out of range) warnings, and made some small changes to shift speeds to avoid having the upshift / downshift curves intersect / cross.

Give it a try, and see how / if it shifts now.


Regards,
Taz

[Travose21]

Loaded it up and it didn't shift. It shifted 1-2 fast too early and it didn't do 2-3 shift. But I gave it another try and held a steady 6200 rpms then it shifted. Seems like I need to bring the mph limited down about 5-10 mph

[Taz]

I didn't check the Speedometer segment - assumed it was calibrated for your tires and gears - you may want to confirm those parameters.


Regards,
Taz