I purchased my 2000 Chevrolet Silverado LS (5.3 Vortec, automatic transmission) in March with 183k miles. The previous owner had a rebuilt transmission put in or had the transmission totally rebuilt. The transmission tended to shift harsh. My mechanic stated that the previous owner may have had a shifter kit installed, which would cause harsh or delayed shift.
I changed my oil at the time of purchase with Mobil1 Hm Synthetic and Auto-Rx. I changed it again in October with Valvoline R&P. There were no signs of oil usage with the Mobil1. With the Valvoline there was 1 quart of consumption at about 1900 miles. After posting here, I replaced the PCV valve with the fixed orifice PCV valve. The old AC Delco moved but seemed sticky/gummy.
Since changing the PCV the transmission seems to shift much smoother. Could it be that the PCV was sticking and affecting the vacuum? Can the PCV affect transmission shift?
I changed my oil at the time of purchase with Mobil1 Hm Synthetic and Auto-Rx. I changed it again in October with Valvoline R&P. There were no signs of oil usage with the Mobil1. With the Valvoline there was 1 quart of consumption at about 1900 miles. After posting here, I replaced the PCV valve with the fixed orifice PCV valve. The old AC Delco moved but seemed sticky/gummy.
Since changing the PCV the transmission seems to shift much smoother. Could it be that the PCV was sticking and affecting the vacuum? Can the PCV affect transmission shift?