4L80E & TH400 Tech. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

picklito · 03-23-2016, 10:41 PM

Mr. Clinebarger,
Me again. On the same 2003 Yukon/8.1/4L85E that I firmed up previously, I had also been noticing that the shift point RPM seems to be slowly increasing over the last couple years. Even at pretty light throttle around town, every gear seems to hang on just a little too long, and getting longer. Any idea what that might be and how to fix it? There has never been any electronic tuning to the truck. thx.

03-23-2016, 10:41 PM	#11
picklito Registered User Join Date: Sep 2013 Location: Vacaville CA Posts: 490	Re: 4L80E & TH400 Tech. Mr. Clinebarger, Me again. On the same 2003 Yukon/8.1/4L85E that I firmed up previously, I had also been noticing that the shift point RPM seems to be slowly increasing over the last couple years. Even at pretty light throttle around town, every gear seems to hang on just a little too long, and getting longer. Any idea what that might be and how to fix it? There has never been any electronic tuning to the truck. thx.



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