Grinding Noise After Agile Off-Road Driveshaft Install on Lifted 2024 Grenadier — Any Ideas?

[salmankali]

Hello everyone,

I have a 2024 INEOS Grenadier that was lifted using the 2.5” Eibach lift kit. I recently had the Heavy Duty Front Driveshaft by Agile Offroad installed as well — both upgrades were done by the dealer.

Since the install, I’ve noticed a loud grinding noise whenever I’m driving at around 55 mph or higher, particularly when I let off the accelerator. The noise disappears once the speed drops below about 53 mph.

Everything feels solid otherwise, but this sound is concerning. Has anyone else experienced this or know what the fix might be? Could it be the driveshaft angle, balance, or something else?

Appreciate any advice — thanks in advance!

 

[Dokatd]

Hello everyone,

I have a 2024 INEOS Grenadier that was lifted using the 2.5” Eibach lift kit. I recently had the Heavy Duty Front Driveshaft by Agile Offroad installed as well — both upgrades were done by the dealer.

Since the install, I’ve noticed a loud grinding noise whenever I’m driving at around 55 mph or higher, particularly when I let off the accelerator. The noise disappears once the speed drops below about 53 mph.

Everything feels solid otherwise, but this sound is concerning. Has anyone else experienced this or know what the fix might be? Could it be the driveshaft angle, balance, or something else?

Appreciate any advice — thanks in advance!

Well, that's kinda just what happens when you run U-joints at those angles. You are far better off with the stock shaft and new Terra Joints.

 

[derek0343]

Hello everyone,

I have a 2024 INEOS Grenadier that was lifted using the 2.5” Eibach lift kit. I recently had the Heavy Duty Front Driveshaft by Agile Offroad installed as well — both upgrades were done by the dealer.

Since the install, I’ve noticed a loud grinding noise whenever I’m driving at around 55 mph or higher, particularly when I let off the accelerator. The noise disappears once the speed drops below about 53 mph.

Everything feels solid otherwise, but this sound is concerning. Has anyone else experienced this or know what the fix might be? Could it be the driveshaft angle, balance, or something else?

Appreciate any advice — thanks in advance!

That's what it is when we have this huge pinion angle. John runs this setup in entire Baja race this year, it should be fine at the moment.

 

[C-Mack]

Unfortunately that’s the vibration and noise you get by running single cardan style driveshafts for a driveline designed with complex and compound diff(s) and transfer case angles.

They are indeed stronger for slow off-road use and can reduce failures on the trail but they are going to vibrated and make a bit of noise in the high speed regime which will wear them out faster especially if that’s the bulk of the driving you’ll be doing.

So it’s a pick your poison situation where you stick with stock for smoother operation and watch for CV-boot failure or use the more robust driveshafts and put up with the harshness. On some vehicles the noise/vibration will be more or less as there are a lot of variables at play but I wouldn’t expect them to ever run as smooth as stock.

Could suppliers be bit more up front about possible running issues and compromises like this so buyers know what they are committing to?

 

[anand]

Some noise and vibration are to be expected at highway speeds, especially when the drivetrain is unloaded (deceleration).

Was the driveshaft something you picked out of something Mossy suggested?

 

[Dokatd]

Unfortunately that’s the vibration and noise you get by running single cardan style driveshafts for a driveline designed with complex and compound diff(s) and transfer case angles.

They are indeed stronger for slow off-road use and can reduce failures on the trail but they are going to vibrated and make a bit of noise in the high speed regime which will wear them out faster especially if that’s the bulk of the driving you’ll be doing.

So it’s a pick your poison situation where you stick with stock for smoother operation and watch for CV-boot failure or use the more robust driveshafts and put up with the harshness. On some vehicles the noise/vibration will be more or less as there are a lot of variables at play but I wouldn’t expect them to ever run as smooth as stock.

Could suppliers be bit more up front about possible running issues and compromises like this so buyers know what they are committing to?

With this new world of fast fashion off-road we're not likely to get those disclaimers. These Van companies jumping head long into real off-road vehicles are just asking for trouble. I certainly wish them the best and I have bought from both Owl and Agile. But it pays to slow down the process a bit and do a bit more R&D.

 

[Zimm]

Who (with experience) didn’t see this coming. (Read other threads)

Anyone know what an unwarranted tcase for these runs? I figured we’d find out when those 3-2 downshifts start to claim them after 80k miles, but it appears those cheap driveshafts are likely gonna tell us sooner than expected.