#7at

Post-tune observations: limp mode on low fuel, and slippage in high gears

In 6th or 7th gear (both are overdrive) when I step on the loud pedal it feels like the torque converter slips, or at least not all the power reaches the road because the revs rise and boost builds, but the car does not change speed! If I drop it to 5th (1:1) or 4th, this does not happen.

I have also observed it on hard acceleration shifting from 4 to 5. Gear 5 does not engage fully and I have to back off otherwise the revs shoot up and the limiter kicks in! Not an issue observed between gears 1-4. Full-bore shifts between 4 and 5 are presently off limits.

When coming to a halt with the transmission in auto, the transition from 3-2 and from 2-1 is much more harsh than it used to be when the car was stock, to the point that there’s a moment of wheel slip if the road surface is slippery.

A response from Stillen:

"…the torque tables may need to be adjusted with UpRev." They’ve asked Norris Designs for a ROM dump so that the Stillen tech can  see if he can spot anything to improve this.

Update: This is now fixed! It was incorrect torque tables. Stillen had sent the wrong data :(

Information on forced induction and automatic (torque converter) transmissions

Forced Induction & 7AT 370z Info

See also ’Forced Induction and Automatic Transmissions' on this page (scroll down).

Limp mode on low fuel?

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