2006 Chevy 3500 HD 6.6 Isuzu Diesel 6 spd Allison Auto Trans 6331 miles.
When I come into a town and coast down from 70 mph to 40 mph the trans stays in 6th gear lugging the rpm to 1100. Needless to say it gets pretty jerky. I have a Hobart 10k welder, Oxy/Acetylene bottles, Huge air compressor, and a 3ton 21 ft Auto Crane, Replacement filters for detroit 8v71 and 8v92 engines, 1 set swabs and liners for garner denver 4 1/2" mud pumps, 10gal 40w oil, 6 gal antifreeze, 5 gal 90Wt., and a complete master set of mechanics tools (sockets and wrenchs up to 3 1/2 " ) "oil field" The truck is weighed down pretty good.
It was purchased as cab & chassis.
Does anyone know of any updated calibrations that might address this issue. Keep in mind the symptom is intermittant. I just think it should downshift on it's own at 1100 rpm's maintaining 42 mph.
I checked alldata and got nothing.
The dealer was a waste of time too.
Please Chevy Guru's, tell me I have the wrong VB,PCM or calib.
2006-09-07
16:37:37
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6 answers
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asked by
Anonymous