3rd gear flare shift

[mstordahl]

What would be the best place to start to get rid of the flare shift that I get between 2nd and 3rd at light throttle? Would it be the TVA?

[2007 5.9]

Yes add TTVA until its gone...or you might need to adjust the second gear band.

[mstordahl]

Will there be a point at which I know that I need to adjust the second gear band?

Im assuming that adding ttva would be in the low throttle range?

Thanks!

[2007 5.9]

When was the last time you adjusted it?

Generally 20k is about as long as I go, 30k is spec.

Yes adjust TTVA under 15% TP

[mstordahl]

The trans is almost new, only 3000 miles on it now. It seems to be getting progressively worse but that may be just me getting really annoyed with it. It only does it when it gets warm as well, dont know if that tells you much. I will try to adjust the TTVA under 15% and see what it does.

Hopefully this is not an issue with the trans itself...

[2007 5.9]

Progressively worse indicates a worn band or loose band.

Either take it back to the builder or adjust the band..if its truly worn or loose then adjusting the TTVA is a bandaid..and it'll keep getting worse..

[mstordahl]

What about it being worse when warm? It does not do it cold at all.

[2007 5.9]

Cold fluid is thicker and once it's warm it thins out...thicker fluid allows better transfer of motion from the second gear apply piston..whereas with thin fluid the apply piston may not move quite as much...causing the band to not apply appropriately and the drum not stopping as designed and causing the 2-3 flare you have.

[mstordahl]

So it would be a good idea to just pop off the pan and have a look at the band then? Do you think that there is even any point in adjusting the TTVA?

I talked to the builder and they suggested to adjust a screw on the valve body to raise the pressure a bit, or buy their shif enhanser. Seems to me this might be another band aid again. Guess I should just pull the pan and have a look.

[2007 5.9]

Is the trans under warranty??

The shift Enhanser does nothing more than change TTVA like you can in the tune...

If they suggest a shift Enhanser then go ahead and mess with the TTVA and see how that goes.

I would not be satisfied with a brand new trans that has a degrading shift quality and being told that you need to buy parts to fix it or do your own adjusting...just saying.