Tranny question

[tpearia]

Just got my FU installed on my truck, and I noticed, especially with some of the more aggressive tunes, when shifting the tranny seems to sort of slide down in the rpms a bit before hitting the next gear quite hard.

I was wondering if this is just sort of how these trucks react to an aggressive tune, like maybe part of the tune, or if its just a product of a tired tranny.

Thanks for any input!

[rammertide07]

How agressive of a tune are you talking about? Have done any mods to the tranny (shift kit/torque converter)?

[tpearia]

Its a 140 tune, on a stock auto tranny.

[tpearia]

Check that, it does some fairly erratic stuff on all the the tunes. Wierd.

[rammertide07]

Originally Posted by tpearia

Its a 140 tune, on a stock auto tranny.

No, no, no...I recommend taking that chip off (unless you can resist the urge to put it on 140) before you tear that transmission up. I would not go over 75-80 on a stock transmission IMO.

[cleatus12r]

What is your invoice number?

[tpearia]

Invoice number 3833.

Only reason I had the 140 on it was just to check it out. Not something Ill use on a regular basis. Its a hauler not a hotrod. lol

Seems to do it with any tune really. Been driving with the fuel sipper tune, and it just seems whenever it shifts, not sure how to describe it, maybe locks the converter up immediatly? It goes into the next gear ok, for a second, and then the rpms drop way down, in somewhat of a jerk, almost bogging the truck. Does it under normal and moderate throttle.