Offroad Trailblazers and Envoys

Is it safe...

Trailblazer and Envoy related, but not off-road related...

by 06MidnightBlue » Fri Jul 22, 2011 12:20 am

to run th TB in Automatic 4WD? I'm confused of what the owners manual is telling me. Many thanx :excited:
User avatar
06MidnightBlue
Addict
 
Posts: 597
Joined: Tue Jul 12, 2011 4:14 am
Location: CA, Sacramento
Name: Jeff
Vehicle Year: 2006
Vehicle: Chevrolet TrailBlazer
DriveTrain: 4WD

by Gordinho80 » Fri Jul 22, 2011 1:41 am

A4WD is meant more for when the roads are slightly slippery, ie rain, light snow.... If dry, it's really best to stick with 2HI.
Mario - Build Thread
User avatar
Gordinho80
Lifer
 
Posts: 2787
Joined: Tue Sep 08, 2009 9:27 am
Location: NJ, Jackson
Name: Mario Almeida
Vehicle Year: Other
Vehicle: Other Vehicle
DriveTrain: 4WD

by bartonmd » Fri Jul 22, 2011 6:30 am

Gordinho80 wrote:A4WD is meant more for when the roads are slightly slippery, ie rain, light snow.... If dry, it's really best to stick with 2HI.


This ^^
bartonmd
Moderator
 
Posts: 4469
Joined: Wed Sep 09, 2009 9:35 am
Location: IN, Indianapolis
Name: Mike
Vehicle Year: 2007
Vehicle: Chevrolet TrailBlazer
DriveTrain: 4WD w/ G80
Rank: Offroad Rated

by The Roadie » Sat Jul 23, 2011 3:07 pm

The Owner's Manual even said A4WD was safe in 2002. But before they redesigned an internal bearing mount in the 2005-vintage cases, the force of engagement could break that part. Goofs.

If the driver is pushing the envelope enough on slippery surfaces to actually get A4WD to engage, then they're either going too fast for conditions, or they should be in 4HI. IMHO. Only rational justification I've seen for A4WD in many discussions on the OS is pulling from a snow-covered side street, turning 90 degrees onto an ice-patch-covered main street with traffic coming that within a few feet turns dry. But you need traction right after you turn and start up on the main street. Can't think of any other time you NEED A4WD, and the onset of engagement might be enough to break tires loose when you would otherwise value the predictability of 2HI or 4HI.
User avatar
The Roadie
Founder
 
Posts: 5011
Joined: Mon Sep 07, 2009 11:29 pm
Location: CA, Vista, San Diego County
Name: Bill Carton
Vehicle Year: 2004
Vehicle: GMC Envoy
DriveTrain: 4WD w/ G80
Rank: Expedition Guide


Return to Truck Discussion