Transmission Question

[up4speed]

I agree it is RPM and load dependent, but there is also something related to throttle inputs (aka driving style) that I haven’t figured out. It will hit 9th in the 40’s and 5 minutes later it won’t, in identical conditions (ie flat road, speeds, even attempted throttle inputs).

I mostly drive with boost at 0 psi or less. It’s possible hitting boost above 0 psi adds input to the computer. I haven’t paid attention, but will start.

Yes, definitely has the speed and pressure of the throttle as one of the parameters as well

 

[alienpoker]

When it shifts into 9th at 72 it drops to what, 1500 rpm?…less?

On a Nismo highway cruise it’s closer to 1750 rpm in Standard mode. I’ve never hit 9th at less than 72 mph- But it’s obv dependent on driving style. If you do get to 9th, even if you slow slightly, it can remain there depending on road grade & load.