WhiteCommie
New Member
- Joined
- Feb 15, 2023
- Messages
- 16
- Reaction score
- 7
- Points
- 3
- Age
- 25
- Location
- Sydney Australia
- Members Ride
- 2008 Commodore VE V6 3.6L Auto
Hi all, hope everyone is having a great day.
Specs:
I've got a 2009 VE commodore Ute:
- V6 3.6L engine (can take Ethanol or Petrol)
- M82 Automatic Gearbox is currently installed AKA (5L40E)
- has a sporty trim with the red dials and red LCD display for the centre console (not sure which custom package it is)
Problem:
When I'm driving at rev and speed ranges specifically (70-80kph) (1,500 RPM) and (80-120kph) (2,500 RPM) i get this really weird vibration (similar to highway rumble strips "brrrrrrrrrrrrruuuummmpp"). As soon as it changes gear all the vibration disappears and then comes back again when i reach those rev ranges (sometimes at higher speeds too).
Additionally, it also happens when there's a load occurring e.g. driving on a slight incline, turning left, turning right or bumpy roads.
Attempted Fixes:
Things I've checked and completed:
- Changed the donuts and the centre bearing. (donuts were cracked and centre bearing rubber was cracked at the top) Installed them as they should be considering the positioning of the bolts where the thicker part is in compression, thinner part compression.
- Wheels have been rebalanced and fitted, (all of them).
- Parking brake shoe has been reset (originally it was so tight it wouldn't move in neutral or automatically in reverse with no throttle on even ground).
- Automatic transmission fluid has been changed with new filters and new fluid filled properly (drained and re filled, engine on for a bit though the gears, refill till you get wet fingers etc.)
Notes:
1) previously, the gearbox has been swapped, along with a new torque converter which I was told at the time "fitted with a stally, and now has the correct one"
2) The installation of the centre bearing is adjustable slightly, as per this forum on 08-09 pontiac G8's (similar driveline system) Check out "#PIC4989: Drive Line Boom Noise And/Or Vibration - (Oct 2, 2008)"
3) when I was installing the new rubber donuts, I notice that I had to buy larger ones. although through every website i've used to configure my vehicle into their product recommendation system for a '09 Commodore Ute everyone recommends a smaller donut.
- VE commodore rubber coupling size: 96mm PCD, Outer Dia 134mm , Centre Hole 50mm.
- Current ones installed: 105 PCD, Outer Dia 141mm, Centre Hole 55mm.
Question:
Does anyone know how to fix this issue and have any experience? I've looked at posts all across the forum and still can't find the problem, I've tried to adjust the centre bearing today and "re-align" it using adjustment holes but no avail, still happens. Also, have I got the wrong coupling donuts? Why is my donuts larger? should I consider the smaller ones?
Thank you all.
Specs:
I've got a 2009 VE commodore Ute:
- V6 3.6L engine (can take Ethanol or Petrol)
- M82 Automatic Gearbox is currently installed AKA (5L40E)
- has a sporty trim with the red dials and red LCD display for the centre console (not sure which custom package it is)
Problem:
When I'm driving at rev and speed ranges specifically (70-80kph) (1,500 RPM) and (80-120kph) (2,500 RPM) i get this really weird vibration (similar to highway rumble strips "brrrrrrrrrrrrruuuummmpp"). As soon as it changes gear all the vibration disappears and then comes back again when i reach those rev ranges (sometimes at higher speeds too).
Additionally, it also happens when there's a load occurring e.g. driving on a slight incline, turning left, turning right or bumpy roads.
Attempted Fixes:
Things I've checked and completed:
- Changed the donuts and the centre bearing. (donuts were cracked and centre bearing rubber was cracked at the top) Installed them as they should be considering the positioning of the bolts where the thicker part is in compression, thinner part compression.
- Wheels have been rebalanced and fitted, (all of them).
- Parking brake shoe has been reset (originally it was so tight it wouldn't move in neutral or automatically in reverse with no throttle on even ground).
- Automatic transmission fluid has been changed with new filters and new fluid filled properly (drained and re filled, engine on for a bit though the gears, refill till you get wet fingers etc.)
Notes:
1) previously, the gearbox has been swapped, along with a new torque converter which I was told at the time "fitted with a stally, and now has the correct one"
2) The installation of the centre bearing is adjustable slightly, as per this forum on 08-09 pontiac G8's (similar driveline system) Check out "#PIC4989: Drive Line Boom Noise And/Or Vibration - (Oct 2, 2008)"
3) when I was installing the new rubber donuts, I notice that I had to buy larger ones. although through every website i've used to configure my vehicle into their product recommendation system for a '09 Commodore Ute everyone recommends a smaller donut.
- VE commodore rubber coupling size: 96mm PCD, Outer Dia 134mm , Centre Hole 50mm.
- Current ones installed: 105 PCD, Outer Dia 141mm, Centre Hole 55mm.
Question:
Does anyone know how to fix this issue and have any experience? I've looked at posts all across the forum and still can't find the problem, I've tried to adjust the centre bearing today and "re-align" it using adjustment holes but no avail, still happens. Also, have I got the wrong coupling donuts? Why is my donuts larger? should I consider the smaller ones?
Thank you all.