Why does my Sierra 2500 shift so hard?
I have a 2000 Sierra 2500. Recently it’s started to shift extremely hard under certain circumstances. It never does it when it’s cold (the trans, not ambient), and it sometimes does it when it’s warm. Anyone have an idea of what the problem might be? Do you ever change the tranny fluid and filter?
When was last year GMC Sierra had transmission problems?
The 2006 GMC Sierra was the last full model year of the GMT800 platform. There was a limited run of “classic” Sierras that ran in with the GMT900 in 2007. These trucks are over ten years old. It is hitting the point that your 2006 Sierra may be having transmission problems. Below, you’ll find a ton of troubleshooting your transmission problems.
Why is my GMC transmission not shifting properly?
Most GMC transmission problems such as harsh shifting, delayed shifting, no gear, stuck in gear, no reverse or drive are quite often caused by low transmission fluid level. If your GMC vehicle with automatic transmission is not shifting properly, check the transmission fluid first.
Why does my Chevy Silverado shift so hard?
Recently it’s started to shift extremely hard under certain circumstances. It never does it when it’s cold (the trans, not ambient), and it sometimes does it when it’s warm. Anyone have an idea of what the problem might be? Have scanned for trouble codes? Most transmission codes won’t turn on the CEL. Take it to Autozone or O’Reillys.
Is there a GM hard shift transmission defect?
Ultimately, GM owners and lessees face mounting repair costs because of the alleged defect, the complaint says.
What causes a hard shift on a Silverado?
A 12 Hz electrical feedback from the charging circuit may be affecting the transmission pressure control solenoid, causing a fluctuation of the line pressure within the transmission. Throttle position is less than 15 percent. Engine coolant and transmission fluid are at full operating temperature.
What causes transmission to shift from first to second gear?
Some customers may comment that the transmission slips, a shudder, chuggle, or vibration is felt when the transmission shifts from first to second gear. A 12 Hz electrical feedback from the charging circuit may be affecting the transmission pressure control solenoid, causing a fluctuation of the line pressure within the transmission.
Which is TSB is that Silverado hard shift?
SilverSurfer wrote: The latest tsb says to install new 1-2 accumulator valve kit. It says nothing (this time) about reflashing the TCM. Mine shifts harder when cold and smooths out after it warms up. Which TSB is that? Here is one I found from another forum: