Brand new 2013 jetta tdi 6spd manual and driving it for 100 miles I have noticed the following.
There is a moderate vibration (more like a resonance) when engine/transmission input shaft spins at 1800 RPM.
Initially noticed at about 40 mph when in 3rd gear but also very apparent at about 60 mph in 5th gear (also1800 RPM).
The vibration feels as if a tire is out of balance and persists if I disengage clutch leave the shifter in gear and let engine rpms drop to idle , suggesting it may be tire or driveshaft related, however if I then place shifter to neutral, keep clutch disengaged, and coast at same speed the car has no vibration and is smooth even if I rev engine to 1800 rpm (difficult to keep at steady 1800 with no load on motor).
This suggests to me that it is related to the rotation of the tranny input shaft and not an engine resonance and not due to tire or axleshaft rotations.
Has anyone else experienced this? Any ideas? I am concerned the tranny shafts or are unbalanced or not perfectly lined up with the engine flywheel which will then wear the input shaft bearings. Car is literally right off the lot! The diesel clatter makes it impossible to hear any bearing or other subtle mechanical issues.
Is this a DMF issue?I kind of envision the DMF as bolted to the engine crank and spinning with the engine revs and not the input shaft unless. I do have the clutch and the engaging from 1st and R gear vibrations as mentioned elsewhere in these forums.
I have been driving a manual for over 40 years and have never experienced this! Separated tire belts, unbalanced tire, snow or dirt in tire rims, bent rims, etc I know very well. This is puzzling to me!
Thanks for any input.
There is a moderate vibration (more like a resonance) when engine/transmission input shaft spins at 1800 RPM.
Initially noticed at about 40 mph when in 3rd gear but also very apparent at about 60 mph in 5th gear (also1800 RPM).
The vibration feels as if a tire is out of balance and persists if I disengage clutch leave the shifter in gear and let engine rpms drop to idle , suggesting it may be tire or driveshaft related, however if I then place shifter to neutral, keep clutch disengaged, and coast at same speed the car has no vibration and is smooth even if I rev engine to 1800 rpm (difficult to keep at steady 1800 with no load on motor).
This suggests to me that it is related to the rotation of the tranny input shaft and not an engine resonance and not due to tire or axleshaft rotations.
Has anyone else experienced this? Any ideas? I am concerned the tranny shafts or are unbalanced or not perfectly lined up with the engine flywheel which will then wear the input shaft bearings. Car is literally right off the lot! The diesel clatter makes it impossible to hear any bearing or other subtle mechanical issues.
Is this a DMF issue?I kind of envision the DMF as bolted to the engine crank and spinning with the engine revs and not the input shaft unless. I do have the clutch and the engaging from 1st and R gear vibrations as mentioned elsewhere in these forums.
I have been driving a manual for over 40 years and have never experienced this! Separated tire belts, unbalanced tire, snow or dirt in tire rims, bent rims, etc I know very well. This is puzzling to me!
Thanks for any input.
