burt ragio
Junior Member
Can I make a correction with my SCT Xcalibrator II. My speedometer is wrong due to gear change from 3:55 to 4:10s. I do not want to use the custom tune the Xcal came with. If so how do I do this ?
Changing the revs per mile will not allow you to benefit fully from the 4.10 swap. The trans shift schedule and torque converter lockup schedule are also adjusted with a 4.10 tune.
Talk to whoever your current tune is from, if you're currently stock then better talk to MO!
Not necessary
Does installing the tune on my xcal3 to a rebuilt pcm count as programming it??
Does installing the tune on my xcal3 to a rebuilt pcm count as programming it??
No
You need the KEY to start that PCM, I know you know this
Delete PATS for that new PCM and see if it starts. This eliminates the key and dongle