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Lost 5th and 6th gear and no speedometer response

Posted: Sat Mar 23, 2013 11:44 am
by RTchally
Hello,

So this morning I tried a few adjustments, but got some scary results. I have a 2012 Challenger RT 6-spd.

If I try to do a quick adjust with either the 91 or 93 tune some bad things happen, These are the items I am changing; the throttle boost +5%, tire size adjust 245/45/r20 and WOT +2% in all three bands. Once I do this I lose my speedometer functionality along with the ability to use 5th or 6th gear. I think it is the throttle boost doing it. I have adjusted the tire size and WOT without the throttle boost and I do not lose the speedo and gears.

Has anyone seen something like this?

I went back to factory tune, then installed the 93 tune without any adjustments. All is well now, but would like to have some of these adjustments stick. :mrgreen:

Re: Lost 5th and 6th gear and no speedometer response

Posted: Mon Mar 25, 2013 12:42 pm
by mikel
this is a manual trans?

how did it keep you out of 5th and 6th gear?

Re: Lost 5th and 6th gear and no speedometer response

Posted: Tue Mar 26, 2013 2:41 pm
by RTchally
Yes this is a manual transmission. 2012 5.7L 6-spd.

It felt like the skip shift function. It was like 5th and 6th was not there. It wouldn't even attempt to go into 5th or 6th.

I don't really want to, but I could possibly make it happen again and log the info for you.