Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum banner
1 - 6 of 6 Posts

·
Registered
Joined
·
4 Posts
Discussion Starter · #1 ·
can someone tell me if the front driveshaft is suppose to turn when in 2wd? i jacked the back wheels up and put in gear and the front driveshaft was turning. I grabbed slowly to see if i could stop it and i did. does this turn by friction or is it suppose to not move at all? thanks
 

·
Banned
2004 gmc
Joined
·
26,436 Posts
The transfer case has some fluidic friction in 2WD mode that sends a tiny bit of torque to the front driveshaft, but as you found out, it's not much. Not a worry.

Did you do this experiment for curiosity, or are you suspicious of something else you see or hear?
 

·
Registered
2003 chevy trailblazer_ls
Joined
·
1,834 Posts
In 2wd the drivers side wheel is connected to the front diff. and the pass wheel is not. The drive shaft will rotate to a point because of grease, friction, etc. The spider gears are spinning and the ring gear may or may not rotate causing the pinion and driveshaft to rotate. Or something like that. Oops, it is on jackstands....... I gotta learn to read!!!!!!!!!!!!!!!!
 

·
Registered
Joined
·
4 Posts
Discussion Starter · #4 ·
The transfer case has some fluidic friction in 2WD mode that sends a tiny bit of torque to the front driveshaft, but as you found out, it's not much. Not a worry.

Did you do this experiment for curiosity, or are you suspicious of something else you see or hear?
well i am getting a gas pedal vibration coming and going, i have been reading alot about driveshaft problems, i do have some play in the front driveshaft and wondering if thats cause some vibration from 55mph to 79 mph i see that they had alot of problems and issues with front and back driveshafts causing problems any input??
 

·
Banned
2004 gmc
Joined
·
26,436 Posts
Many, many possible causes of vibration. How many miles? Have you ever had to replace suspension components like control arm bushings or tie rod ends? Are you on your original shocks? Have you freshly spin balanced your tires? Driveshaft vibration is way down the list of possibilities, but a driveline specialist might be able to help diagnose it for you faster with their tools.
 

·
Registered
Joined
·
4 Posts
Discussion Starter · #6 ·
Many, many possible causes of vibration. How many miles? Have you ever had to replace suspension components like control arm bushings or tie rod ends? Are you on your original shocks? Have you freshly spin balanced your tires? Driveshaft vibration is way down the list of possibilities, but a driveline specialist might be able to help diagnose it for you faster with their tools.
98,000 miles, shocks have been replaced, just had it front end aligned, just got new tires on wednesday, new bearings and hubs both sides. do you know if there should be any play in the shaft? where it mounts to the transfer case.
 
1 - 6 of 6 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top