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LS short box · 03-03-2023, 05:41 PM

Since you don't have a tach it's a bit harder to tell when the converter locks up but you should be able to count the shifts 1-4 and then there you should be able to hear/feel a small drop in rpm.

03-03-2023, 05:41 PM	#8
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 1,953	Re: pcm adjustment Since you don't have a tach it's a bit harder to tell when the converter locks up but you should be able to count the shifts 1-4 and then there you should be able to hear/feel a small drop in rpm.