TLDR: 23 GX with an Ironman lift - chasing a driveline vibration that has recently popped up.
The lift was installed when the vehicle was new, this vibration has become slowly more noticeable within the last 10,000 miles. There was no vibration when the lift was installed. The vibration occurs between 65-80mph - Under 65mph it does not exist and over 80mph it does not exist. It is most certainly a driveline vibration as it is not only a deep harmonic audible noise, it can be felt in the floorboard and the rearview mirror shakes/vibrates in-sync with the harmonic audible noise.
Vehicle:
2023 GX with 20,000 miles.
I have checked / replaced the following:
I am becoming increasingly frustrated, what am I missing or what else should I be looking at? I am desperate as this has gotten worse over time and I'm afraid something is going to break.
The lift was installed when the vehicle was new, this vibration has become slowly more noticeable within the last 10,000 miles. There was no vibration when the lift was installed. The vibration occurs between 65-80mph - Under 65mph it does not exist and over 80mph it does not exist. It is most certainly a driveline vibration as it is not only a deep harmonic audible noise, it can be felt in the floorboard and the rearview mirror shakes/vibrates in-sync with the harmonic audible noise.
Vehicle:
2023 GX with 20,000 miles.
- Ironman 2.5" Lift
- Ironman UCA
- Ironman adjustable panhard bar
- Dr KDSS panhard bar correction kit
- Ironman rear swaybar spacers
- Nitto 285's on SCS wheels.
I have checked / replaced the following:
- All suspension TQ has been checked, verified and marked
- Alignment is dialed in - see attached.
- Driveshafts are greased properly.
- CV axles are tight, no play and no tears/rips in the boots.
- Checked wheel run-out
- Tires have been force match balanced. All tires are under 10lbs of roadforce.
- The wheel to hub mounting points are clean and free of debris. Each mounting surface has a light coating of nickel anti-seize
- New lug nuts TQ at 90-ft/lbs
- Grasping at straws here.
- Rear driveshaft replaced 1000 miles ago with #37110-60A40
- This did eliminate a minor clunk when shifting from park.
- Rear driveshaft angle @ 10.1 deg
- Front driveshaft angle @ 2.1 deg
- LT CV axle angle @ 5.2 deg
- RT CV axle angle @ 9.1 deg
- Font: 38.25"
- Rear: 39"
- Rear driveshaft angle @ 8.5 deg
- Front driveshaft angle @ 2.4 deg
- LT CV axle angle @ 5.4
- RT CV axle angle @ 7.8 deg
I am becoming increasingly frustrated, what am I missing or what else should I be looking at? I am desperate as this has gotten worse over time and I'm afraid something is going to break.
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