Blazer lunging forward
#1
03-17-2018, 06:05 AM
Blazer lunging forward
When ever I start my Blazer up while in parked..It lunges forward for a split second.Why does it do this?This didn`t start happening until I serviced my Transmission last year.All I can think is that the shifter cable needs to be adjusted accordingly.Can anyone tell me why this happens and how to fix it? Thanks a bunch!:
#2
03-17-2018, 08:00 AM
GM has a TSB on this which I have included below:
Bulletin No.: 08-07-30-026
Date: May 22, 2008
Subject:
Information on Slight Vehicle Movement In Park At Start Up After Cold Soak
Models:
2009 and Prior GM Passenger Cars and Light Duty Trucks (including Saturn)
2009 and Prior HUMMER H2, H3
2009 and Prior Saab 9-7X
with Automatic Transmission
Some vehicles may rock or move slightly forward or rearward while in park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.
This slight movement is due to the residual transmission fluid in the clutch packs that creates a partial apply on start up. This movement is stopped by the parking pawl and/or transmission fluid exhausting completely from the clutch packs.
This slight movement has no adverse affects on the transmission and no repair should be attempted. This condition is normal. This can be verified by comparing with another identically built vehicle under the same cold conditions.
To prevent this condition from occurring, the parking brake should be utilized as per the Owners Manual recommendations anytime the vehicle is parked.
Date: May 22, 2008
Subject:
Information on Slight Vehicle Movement In Park At Start Up After Cold Soak
Models:
2009 and Prior GM Passenger Cars and Light Duty Trucks (including Saturn)
2009 and Prior HUMMER H2, H3
2009 and Prior Saab 9-7X
with Automatic Transmission
Some vehicles may rock or move slightly forward or rearward while in park at start up after cold soak. This condition may be accompanied by a clunk noise. This is a slight movement that is more often seen visually, rather than felt, when viewed from the outside and using the auto-start feature, if equipped.
This slight movement is due to the residual transmission fluid in the clutch packs that creates a partial apply on start up. This movement is stopped by the parking pawl and/or transmission fluid exhausting completely from the clutch packs.
This slight movement has no adverse affects on the transmission and no repair should be attempted. This condition is normal. This can be verified by comparing with another identically built vehicle under the same cold conditions.
To prevent this condition from occurring, the parking brake should be utilized as per the Owners Manual recommendations anytime the vehicle is parked.
#3
03-18-2018, 12:41 PM
I also learned how to turn my front tires to catch the curb when parallel parking on a hill.
When my brother and I first moved away from home, we both had found this knowledge was not so common in places like Lubbock TX (where he moved and could not find a hill on which to test his parking brake) and South Bend IN, where I got my first job outside of the Pacific Northwest.
Thread
Thread Starter
Forum
Replies
Last Post
GF79TA462
Steering, Suspension & Drivetrain
0
01-30-2010 06:16 PM
Sarahsmith854
2nd Generation S-series (1995-2005) Tech
2
07-19-2007 09:03 PM
oshkosh
2nd Generation S-series (1995-2005) Tech
5
01-27-2007 01:22 PM