"Bogging" or groaning noise under heavy throttle...

PhiDeltBeers · 02-06-2010, 09:58 AM

Ok, so when my AT hits 2nd or 3rd gear under heavy thottle, I'm getting a "bogging" down feeling in the rear end end. Kind of a groaning sound. It happens with the dct button on as well as off. I'm lowered on eibach prokit with a JB3 tune. Stock wheels. I have NO clue what this is. I don't think it's rubbing and I'm not sure if I'm losing speed when it happens for a split second. I don't feel the tires are slipping either because the engine doesn't seem to kill any throttle. Has anyone experienced anything like this?

Verbiage · 02-06-2010, 10:00 AM

You think its the turbos/exhaust note?

Javier · 02-06-2010, 10:09 AM

sometimes i hear a weird groan between shifts. My car is AT, golf tee mod.
could it be the same problem?

PhiDeltBeers · 02-06-2010, 10:12 AM

I do have the golf tee mod as well. I don't think it's the turbos as it seems to be coming from the rear drivers side of the car. It's a low pitch sound. Correct me if I'm wrong, but turbos make a high pitch sound.

Javier · 02-06-2010, 10:19 AM

sounds like you're getting the same sound as me.. I think that it might be the valve in the exhaust flapping around during shifts that makes this sound.

this is pure speculation though

and yes, its definitely not the turbo's

Javier · 02-06-2010, 10:25 AM

i'm thinking of reversing the golf tee mod to see if my speculations are correct

Verbiage · 02-06-2010, 10:44 AM

Quote:

Originally Posted by PhiDeltBeers

I do have the golf tee mod as well. I don't think it's the turbos as it seems to be coming from the rear drivers side of the car. It's a low pitch sound. Correct me if I'm wrong, but turbos make a high pitch sound.

I was just wondering, because the exhaust range varies.

Quote:

Originally Posted by Javier

sounds like you're getting the same sound as me.. I think that it might be the valve in the exhaust flapping around during shifts that makes this sound.

this is pure speculation though

and yes, its definitely not the turbo's

This may be, since only one of the pipe valves (pre-golf tee mod) emits exhaust force after starting, so perhaps it is an issue with the mod.

PhiDeltBeers · 02-06-2010, 10:48 AM

I might try to reverse that as well and see if it changes anything. Hopefully, that's all it is. Javier, keep me posted and I'll do the same.

Javier · 02-06-2010, 12:25 PM

Quote:

Originally Posted by PhiDeltBeers

I might try to reverse that as well and see if it changes anything. Hopefully, that's all it is. Javier, keep me posted and I'll do the same.

will do

PhiDeltBeers · 02-10-2010, 08:44 AM

I found this post when searching LSD'S. I think this is it. E-diff.... Anyone else getting this?

Sometimes when I would change lanes and floor it in 2nd gear (6AT) I would hear a groaning noise from the rear of the car.

Took me a while to correlate it to the e-diff pulsing the rear brake on one wheel to counter the wheelspin on the inside tire.

And that's with DTC completely off!

Makes sense that it would wear down the rear brakes and slow the car down in the process.

Personally I don't like it.

02-06-2010, 09:58 AM	#1
PhiDeltBeers Lieutenant 96 Rep 552 Posts Drives: SEVERAL Join Date: Nov 2009 Location: Tulsa, OK iTrader: (0)	"Bogging" or groaning noise under heavy throttle... Ok, so when my AT hits 2nd or 3rd gear under heavy thottle, I'm getting a "bogging" down feeling in the rear end end. Kind of a groaning sound. It happens with the dct button on as well as off. I'm lowered on eibach prokit with a JB3 tune. Stock wheels. I have NO clue what this is. I don't think it's rubbing and I'm not sure if I'm losing speed when it happens for a split second. I don't feel the tires are slipping either because the engine doesn't seem to kill any throttle. Has anyone experienced anything like this? __________________ 2019 RANGE ROVER SPORT SUPERCHARGED; 2023 JEEP WRANGLER RUBICON 4XE 2022 AUDI R8 PERFORMANCE RWD; 2023 BMW M3 XDRIVE; 2017 MERCEDES G550; 2023 CORVETTE Z06 (ORDERED)
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02-06-2010, 10:00 AM	#2
Verbiage Dismembered Member 3583 Rep 9,213 Posts Drives: F80 ZCP 6MT, R55 Clubman S 6MT Join Date: Jan 2010 Location: DMV iTrader: (6)	You think its the turbos/exhaust note? __________________ My delivery experience and beach photoshoot here.
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02-06-2010, 10:09 AM	#3
Javier Major 80 Rep 1,109 Posts Drives: 335i E92 Join Date: Nov 2006 Location: Puerto Rico iTrader: (0)	sometimes i hear a weird groan between shifts. My car is AT, golf tee mod. could it be the same problem? __________________ 2007 328i Crimson Red SOLD 2010 335i MSport AW E92
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02-06-2010, 10:12 AM	#4
PhiDeltBeers Lieutenant 96 Rep 552 Posts Drives: SEVERAL Join Date: Nov 2009 Location: Tulsa, OK iTrader: (0)	I do have the golf tee mod as well. I don't think it's the turbos as it seems to be coming from the rear drivers side of the car. It's a low pitch sound. Correct me if I'm wrong, but turbos make a high pitch sound. __________________ 2019 RANGE ROVER SPORT SUPERCHARGED; 2023 JEEP WRANGLER RUBICON 4XE 2022 AUDI R8 PERFORMANCE RWD; 2023 BMW M3 XDRIVE; 2017 MERCEDES G550; 2023 CORVETTE Z06 (ORDERED)
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02-06-2010, 10:19 AM	#5
Javier Major 80 Rep 1,109 Posts Drives: 335i E92 Join Date: Nov 2006 Location: Puerto Rico iTrader: (0)	sounds like you're getting the same sound as me.. I think that it might be the valve in the exhaust flapping around during shifts that makes this sound. this is pure speculation though and yes, its definitely not the turbo's __________________ 2007 328i Crimson Red SOLD 2010 335i MSport AW E92
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02-06-2010, 10:25 AM	#6
Javier Major 80 Rep 1,109 Posts Drives: 335i E92 Join Date: Nov 2006 Location: Puerto Rico iTrader: (0)	i'm thinking of reversing the golf tee mod to see if my speculations are correct __________________ 2007 328i Crimson Red SOLD 2010 335i MSport AW E92
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02-06-2010, 10:48 AM	#8
PhiDeltBeers Lieutenant 96 Rep 552 Posts Drives: SEVERAL Join Date: Nov 2009 Location: Tulsa, OK iTrader: (0)	I might try to reverse that as well and see if it changes anything. Hopefully, that's all it is. Javier, keep me posted and I'll do the same. __________________ 2019 RANGE ROVER SPORT SUPERCHARGED; 2023 JEEP WRANGLER RUBICON 4XE 2022 AUDI R8 PERFORMANCE RWD; 2023 BMW M3 XDRIVE; 2017 MERCEDES G550; 2023 CORVETTE Z06 (ORDERED)
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02-10-2010, 08:44 AM	#10
PhiDeltBeers Lieutenant 96 Rep 552 Posts Drives: SEVERAL Join Date: Nov 2009 Location: Tulsa, OK iTrader: (0)	I found this post when searching LSD'S. I think this is it. E-diff.... Anyone else getting this? Sometimes when I would change lanes and floor it in 2nd gear (6AT) I would hear a groaning noise from the rear of the car. Took me a while to correlate it to the e-diff pulsing the rear brake on one wheel to counter the wheelspin on the inside tire. And that's with DTC completely off! Makes sense that it would wear down the rear brakes and slow the car down in the process. Personally I don't like it. __________________ 2019 RANGE ROVER SPORT SUPERCHARGED; 2023 JEEP WRANGLER RUBICON 4XE 2022 AUDI R8 PERFORMANCE RWD; 2023 BMW M3 XDRIVE; 2017 MERCEDES G550; 2023 CORVETTE Z06 (ORDERED)
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