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>>>>>>>>>>>>>>>>> 11132

[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

[Travose21]

I did 28 inch hoosiers slick with 4.10 gears

[joecar]

Back the WOT shift RPM's down a few hundred rpm.

[joecar]

I did 28 inch hoosiers slick with 4.10 gearsOn the Speedo Calculator window did you click the Apply button (once only) on the Shift Point Correction tab to adjust all the effected tables...?

[Travose21]

I didn't calibrated that the previous tuner did really don't want to mention his name can the tranny b messed up

[Travose21]

Ok Joe look at tune real good and call me when u get a chance. Or taz call me to if I can get this car to shift imma beat the shit out this crew down here in new Orleans

[Travose21]

Ok ill back them down to 6000

[Taz]

Hello Travis,

Sorry my friend ... don't do telephone support ... attached is your tune - but with upshift / downshift speeds and TCC apply / release speeds reset to "stock" - for a 2001 Camaro / TransAm with 4.10 gears and 28 inch diameter tires.

This should give you a "clean sheet" to begin fine tuning.


Regards,
Taz

[Travose21]

heres a data log i did last night...

[Travose21]

the second one i was spinning. i think the performabuilt is going out 2-3 clutches what yall think

[Taz]

Hello Travis,

The PIDs you logged are predominantly engine related - for a transmission issue (especially if you suspect clutch slip) a log consisting of transmission related PIDs would be helpful.


Regards,
Taz

[Travose21]

ok.......................

[DrkPhx]

I can see the problem, but part of the run is not WOT, so it's hard to pinpoint what's causing the problem. As mentioned above, you need to log some trans pids. Change the WOT 2>3 Shift rpm to 6400 rpm so it matches the 1>2 shift. Have someone drive the car so you can use the DVT controls to see if you can force the 2>3 shift. Make sure it's WOT from launch if possible. This will help to see if it's mechanical or not.