Highway drone and loud idle?

[Chadd7]

Hi all! I picked up my Gren Fieldmaster in the US yesterday. Love it so far but I noticed some highway drone at 60-70mph. Also when I'm at a stop sign waiting to make a turn (auto start/stop disabled), the idle is a bit loud. I come from a Mercedes AMG so engine/exhaust noise is something I'm accustomed to, but not loving the drone and rough idle I'm experiencing so far. Hoping some engine break-in will remedy this eventually. Wondering what others' experience is. Please share.

 

[DustCloud]

Noticed a hum around 110km/h first motorway drive. It wasn't super loud, but it was super noticeable. Either it stopped or my brain tuned it out.

 

[Tjhappel]

Definitely a loud center gear box noise on freeway at those speeds. Engine soumds like a diesel right.

 

[anand]

Hi all! I picked up my Gren Fieldmaster in the US yesterday. Love it so far but I noticed some highway drone at 60-70mph. Also when I'm at a stop sign waiting to make a turn (auto start/stop disabled), the idle is a bit loud. I come from a Mercedes AMG so engine/exhaust noise is something I'm accustomed to, but not loving the drone and rough idle I'm experiencing so far. Hoping some engine break-in will remedy this eventually. Wondering what others' experience is. Please share.

Which AMG are you used to driving?

 

[ealshamsi]

Hi @Chadd7,

Welcome to the Grenadier. The noise is a feature of this car. The car is not perfect, but it is worth it. You have to live with it .
Check this past post out:

On Road Noise level

Has anyone seen anything concerning the On Road noise of the Grenadier and in particular the wind noise associated with the snorkel.?

www.theineosforum.com

Eisa

 

[Chadd7]

Which AMG are you used to driving?

Used to drive a C63 and more recently an E53. Traded it in for the Gren.

 

[Chadd7]

Definitely a loud center gear box noise on freeway at those speeds. Engine soumds like a diesel right.

Hi @Chadd7,

Welcome to the Grenadier. The noise is a feature of this car. The car is not perfect, but it is worth it. You have to live with it .
Check this past post out:

On Road Noise level

Has anyone seen anything concerning the On Road noise of the Grenadier and in particular the wind noise associated with the snorkel.?

www.theineosforum.com

Eisa

Thanks. I did read that thread before creating my own. For the highway drone, I really think the sound is coming from the exhaust. I wonder if some modification can be made to eliminate it. It's really annoying.

 

[bemax]

Thanks. I did read that thread before creating my own. For the highway drone, I really think the sound is coming from the exhaust. I wonder if some modification can be made to eliminate it. It's really annoying.

The sound between 110 and 120 km/hor better described near 2000 rpm has been spotted front the beginning. There are some ideas here in the forum but no real solution that fits every car. @AWo for example asks whether it could be a not optimal balanced drive shaft. Others found some heat shields that haven’t been tightened enough. These can either be in under the hood or under the car. Maybe the search function helps you although I don’t know the best search words.

 

[Chadd7]

The sound between 110 and 120 km/hor better described near 2000 rpm has been spotted front the beginning. There are some ideas here in the forum but no real solution that fits every car. @AWo for example asks whether it could be a not optimal balanced drive shaft. Others found some heat shields that haven’t been tightened enough. These can either be in under the hood or under the car. Maybe the search function helps you although I don’t know the best search words.

Danke! It's definitely exhaust drone. I used to have issues with it in the past with aftermarket exhaust systems for other cars. Very familiar with what it sounds like. Never had to deal with it for OEM exhaust!

 

[lightning]

Lovely looking Grenadier you have there. I guess there are always some compromises when driving a truck such as this, that you don't get in a Mercedes or similar.

 

[Chadd7]

Lovely looking Grenadier you have there. I guess there are always some compromises when driving a truck such as this, that you don't get in a Mercedes or similar.

Thank you. I've driven Hondas, Mitsubishi, Landcruiser, Wrangler, Subaru, Mercedes, BMW and I have never had a drone from the factory.

 

[Andiamo]

Funny enough I think the Grenadier is the same or a little quieter on the highway than my new Defender was (with the expedition roof rack and KO2 tires). I’ve found that I gauge my speed more by sound than the speedometer and have noticed that I’m on average 5-8ish faster in the Grenadier so I’ve been making a conscious effort to watch my speed around town. Have around 800 miles on our Grenadier now.

 

[Chadd7]

I'm happy to report that after 370 miles on the odometer, these issues seem to be greatly reduced. Took my son to bball practice yesterday and had to make an effort to get the drone to come back. When it did, it only lasted a few seconds. The rough idle also lasts a few seconds and then goes away at a red light. Will continue to monitor.

 

[Stu_Barnes]

Thanks. I did read that thread before creating my own. For the highway drone, I really think the sound is coming from the exhaust. I wonder if some modification can be made to eliminate it. It's really annoying.

Agree with you on this totally. It’s not vibration.

However at idle mine is very quiet. Quieter than the LR4 and less vibration as well.

 

[Trialmaster]

Used to drive a C63 and more recently an E53. Traded it in for the Gren.
View attachment 7836847

I had a C63 with the 6.2 V8 - great engine - but the rattles and squeaks did my head in!

Considering trading back to a used R35 GTR, I miss the performance!

 

[lightning]

I'm happy to report that after 370 miles on the odometer, these issues seem to be greatly reduced. Took my son to bball practice yesterday and had to make an effort to get the drone to come back. When it did, it only lasted a few seconds. The rough idle also lasts a few seconds and then goes away at a red light. Will continue to monitor.

l've had a couple of vehicles where the engine has needed a bit of time to bed in and become perfectly smooth.

 

[Chadd7]

Well, driving today the drone is definitely back. The vibration at red lights and stop signs has not returned.

 

[IG_in_AZ]

I have the 2000 rpm - or thereabouts - drone in 8th gear only, as far as I can tell. Basically, highway speeds 60-65 MPH or so, in 8th.

 

[lightning]

Love the photo! Great news regarding your cancer treatment.

How many miles have you done in your Grenadier? The noise may reduce once you've done some mileage and the engine is loosened up a bit.

 

[Mountain4x4]

Keep in mind the Grenadier has a gear driven t/case. While being the cats meow of durability, it makes more noise then the cheap chain driven t/cases. That is a price I am willing to pay. That being said Jeeps Rock Trac case while being amazing at a 4:1 proper ratio, makes REDICULOUS amounts of noise, even in 2wd. I am blown away by how quite the Grenadier one is, because that is something you mostly see in tractors these days. Anyone here ever fight t/case chain stretch? I have, and its ugly.