New Tires, and New Gears, 2010 Truck

[Gordon0652]

Just installed new 32.99" tires and 4.10 gears in my Sierra with the 4.8 4-Speed.
Trying calibrate for new tires and gears. PCM is taking the calibration but i am seeing no change in the speedometer.
I am tuning in the transmission.
Transmission Calibration => Speedo => Parameters => H0103 changed to 4.10 => Speedo Calculator => Speedo Calculator => Width 275 => Profile => 60 => Rim 20 => Apply.

Save As => Program PCM with currently loaded calibration.

Drive on the highway and see no difference.

HELP


Heres the strange part, my factory PCM says my gears are 3.73, that has to be wrong because that was no option for my truck, my truck has 3.42. Any sense?

Also i go into shift point correction:
Origional Calibration Values => Tire Diameter 31.61 => Diff. Ratio 3.73. (kept it stock)
New Calibration Values => Tire Diameter 32.99 =. Diff. Ratio 4.10 (what i installed)

And then it does not come up with a % change. Does nothing.


Please help, i am going back to college Sunday morning and need my truck calibrated by then.

[Gordon0652]

That is the factory tune.

Stock 2010 MY TRUCK TRANS.tun

[Gordon0652]

AWESOME!!! not

Went to buy an engine license V2 and says my Serial # and code is incorrect! Looked at it 3 times and i entered everything right. Go figure can only expect these computers NOT to work. Looks like it wont happen before Sunday. POS!!!

[joecar]

I don't see all the speedo parameter in the trans file... can you also post the engine file.

I pm'd Tech Support regarding the incorrect serial number.

[Blacky]

AWESOME!!! not

Went to buy an engine license V2 and says my Serial # and code is incorrect! Looked at it 3 times and i entered everything right. Go figure can only expect these computers NOT to work. Looks like it wont happen before Sunday. POS!!!

What was the order number? I'll check it out for you.
Regards
Paul

[Blacky]

Looks liek you have two orders: 15679 and 15680
15679 failed
15680 succeeded

Do you want to cancel 15679?

Regards
Paul

[Blacky]

Also i go into shift point correction:
Origional Calibration Values => Tire Diameter 31.61 => Diff. Ratio 3.73. (kept it stock)
New Calibration Values => Tire Diameter 32.99 =. Diff. Ratio 4.10 (what i installed)

And then it does not come up with a % change. Does nothing.


Please help, i am going back to college Sunday morning and need my truck calibrated by then.

You should see -5.55% in the "Adjust by:" box. (as in the attached image).
You may also need to set the speedo parameters in the ECM (not just the TCM).

Regards
Paul

[Gordon0652]

Looks liek you have two orders: 15679 and 15680
15679 failed
15680 succeeded

Do you want to cancel 15679?

Regards
Paul

Yes i do! I think its working now for me.

[Gordon0652]

Someone want to take a look at these "tunes" for my gears and tires?
My speedometer is still 2-3mph slow, i will fix that tomorrow. Messed around with tire sizes all night to get it closer and closer.
4.10s and 32.99s ENGINE.tun
4.10s and 32.99s.tun

[InTruckDesign]

If you are just 2-3mph off then under the speedo calculator tab select speedo fine tuning enter values and apply.
Also you need to change both tcm speedo settings and ecm speedo settings.