4L80E late shift to 4th??

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v84u2nv
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4L80E late shift to 4th??

Post by v84u2nv » Tue May 22, 2018 5:16 pm

1997 Chevy box truck, came in , melted the 4th gear! Replace entire 4th gear clutch housing, all new clutches, bushing, electronics, Supierior shift kit and internal wiring harness , even the pcm was changed. Shifts great 1-2, 2-3 but doesn't seem to want to go to 4th until 55+ mph. I would have thought under light throttle 4th would come in sooner. Is this normal? thanks guys

brettsb16a2
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Re: 4L80E late shift to 4th??

Post by brettsb16a2 » Fri Jun 01, 2018 8:53 am

Hook up a real scan tool and read your pid data.

v84u2nv
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Re: 4L80E late shift to 4th??

Post by v84u2nv » Wed Jun 06, 2018 12:51 pm

yup, just wants to shift to 4th after 55mph, works fine. I have Tech II scan tool. I was just thinking under light throttle it might up shift sooner than 55. thanks

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