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Blinking "D5" on gear indicator

I have three signs of potential transmission problem :
1. Whinning which has been on and off
2. Big Thud which comes and goes everytime I start moving forward after
backing
3. Recently, blinking "D5" on the Gear Indicator located at the speedometer
What should I do? Please help. Vehicle : 03 MDX
Pat Lauder([email protected])



Did TW worsen over the above time periods?

Dealer response and/or corrective actions:

Cost: If none, put "warranty" or "goodwill"
Mileage TW was addressed by Dealer:
Did you contact your local Client Services (Owners.Acura.com)? Enter Case #.
Current status of TW.

For all others who have had zero issues please put "NO FAILURE"
List year:
Current mileage:[/B][/QUOTE]
 

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Original owner of '01 with 89,800 miles. No failure, no issues
 

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So Far So Good!

'03 Touring 96k - Fingers crossed :6:

Every 10K :4:

Tranny fluid change (triple drain/fill)

VTM-4 fluid change

Every 20K

Transfer fluid change
 

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Purchased my 2005 Acura MDX Touring with Nav/DVD brand new from Open Road Acura of Wayne, NJ. For a luxury vehicle I expected much more, especially from Acura corporate. Never once other than a week after my purchase have they followed up with a phone call for all the problems I've encountered. Let me share with you my true experience: Two weeks after my purchase, there was rattling coming from my drop down DVD; took it in to dealer and got it was fixed. Then there were several other minor problems that dealer fixed under warranty. Still within warranty period, woofer and bass from stereo system was vibrating loudly in rear. Problem still continues today after quick fix by dealer. Then DVD and Navigation stopped working; dealer replaced. Again and again, I took MDX to dealer to address loud squeaking noise coming from idler, tensioner pulley. First they cleaned and conditioned but noise resurfaced. I took it in several other times but idler/tensioner puller was never replaced even though there was a recall or TSB on this particular equipment. This problem continues and I reported it to client care but they have refused to contact the dealer to address cost and fix. In fact, Julian from Acura care insisted that he could not call the dealer on my behalf. And, on my last two visits to Open Road Acura, I again addressed my concern with the ongoing noise from idler and tensioner pulley and whining noise coming from accelerating. (a) I was told that the belt was replaced but noise continues and is still present today. I am in no way a certified Acura technician but common sense tells me that the idler and pulley itself needs to be replaced and the dealer is refusing to replace new without a cost even though this problem was documented in service history while MDX was still under warranty. (b) The noise coming from accelerating particularly on the highway 50-60 mph, I believe may be related but not sure. It's the kind of sound that causes an earache similar to being on airplane; continuous whirring, hissing sound. Service advisor at Open Road Acura advised me that this is my transmission going bad and could fail at any time though sound is only present when accelerating at 50-60mph, highway driving. So, let's be real Acura. You tout and promote a luxury vehicle costing thousands of dollars with a life expectancy of less than three years for the transmission? This is outrageous! Especially, after I've maintained and used only Acura dealership for maintenance and preventative services. The Acura brand may be an excellent product but my MDX experience has failed to live up to this reputation and certainly Acura as well. And, if measures and actions were taken to correct the problems and issues I've had, perhaps I would have felt otherwise. What happens if my MDX seizes up or causes a fatal accident on the road due to lack of corrective measures on the part of Acura? Who should I hold responsible? Could this be a cover-up to avoid a recall? We've all paid a lot of money to be simply ignored by Acura Motors and this is not a dealer specific issue. Sorry for such a long “gripe” but I know they're more of you out there just waiting to be heard.
rp
 

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List model year: 2005
Date/Mileage TW was first observed: 40,000
Current mileage: 86,000
Symptoms: 1. Squeaking and grinding at start-up from tensioner pulley/idler

2. Present and ongoing whining, whirring sound when accerelating at 40-60 mph then disappears when deaccelerating
Did TW worsen over the above time periods? Yes

Dealer response and/or corrective actions: 1. Open Road Acura "dressed" tensioner belt and cleaned area but noise has resurfaced and still present. Refused to replace new pulley.
2. Dealer advised that the transmission is going bad and need to replace new A/T. No other diagnostic was done.
Cost: If none, put "warranty" or "goodwill" Dealer asking $2,500 even though all the related issues was reported and worked on under manufacturer warranty
Mileage TW was addressed by Dealer: no
Did you contact your local Client Services (Owners.Acura.com)? Enter Case #.
Current status of TW. Yes. Acura Client Care has refused to intervene on my behalf and I have never received communication from them other than a week after I purchased vehicle

For all others who have had zero issues please put "NO FAILURE"
List year:
Current mileage:

__________________
'05 MDX
Touring/NAV/RES
 

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Sorry to hear about your MDX situation. Its unfortunate that you had a difficult time with Open Road and Acura. You plan to keep the MDX? Theres gotta be things you like about the MDX.
Thanks for the reach-out. I'm new to this forum and really wanted to start a thread "Shame on Acura for not standing behind it's product -MDX". I wanted to see what others have to say so that perhaps Acura will take notice. I can't believe that a recall or TSB was never issued for this particular problem and how much Acura is resisting to address this issue. So for now, I'm planning to keep my MDX.
 

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List model year: 2001
Date/Mileage TW was first observed:
115,000
Current mileage:
132,000
Symptoms:
Severe whine when accelerating, engine hums when idling, goes away when put in N, jerky gear shifts
Did TW worsen over the above time periods?
Yes

Dealer response and/or corrective actions:
Tranmission was replaced 1 year ago with remanned tranny (from H&N Auto I think). Just last month it failed again and had another one installed!

Cost: If none, put "warranty" or "goodwill"
$4000 for 1st tranny replacement, $2400 for 2nd
Mileage TW was addressed by Dealer:
115,000
Did you contact your local Client Services (Owners.Acura.com)? Enter Case #.
No
Current status of TW.
Fixed, but acceleration seems a little soft during gear changes esp. going uphill
 

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List model year: 2002
Date/Mileage TW was first observed: ? Maybe 100K?
Current mileage: 196K
Symptoms: a whine starting about 30mph, pitch increasing with speed. Not correlated to what gear. Inaudible above ~60 mph due to road noise and increasing pitch (plus too many loud concerts in my youth.) The whine was only present when on the gas and power going to the wheels. No noise when coasting or at a stop.
Did TW worsen over the above time periods? No, as best I can remember it was always about the same.

Dealer response and/or corrective actions: N/A

Cost: If none, put "warranty" or "goodwill" $3700
Mileage TW was addressed by Dealer: N/A
Did you contact your local Client Services (Owners.Acura.com)? Enter Case #. N/A
Current status of TW: Gone due to replacement of transmission at 196K
 

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Gear noise - or a "whine" as you are describing - is NOT indicative of a transmission failure. Gear noise is prevalent in many different types of geared systems including automobile transmissions, photo copiers, etc. If you really want to hear some gear noise, put just about any vehicle in REVERSE, get it up to 10-20 mph and listen to the gear noise roar! Modulate the throttle so that you can change the engine speed and change the frequency of the noise.

Gear noise is created by the undulations on the gear teeth profiles as the gears mesh together - these undulations cause vibrations - the vibrations travel from the gear teeth, to the gear blank, to shafts, to bearings, to housings, etc. The gear blanks, shafts or the transmission housings act like speakers and radiate the sound.

Transmission Error is the term used to define the angular displacement of the driven gear (gear) relative to the driving gear (pinion). Perfect involute gear teeth produce zero transmission error at no load. Once load is applied though, the gear teeth bend and Transmission Error occurs and there are other things that create Transmission Error. There is lots and lots and lots of scientific data that correlate gear noise to Transmission Error.

The "undulations" on the gear teeth are on the micron level (1 micron = 0.00004 inches) and you cannot detect them with the human eye - special measurement equipment is used. Gear engineers modify the gear teeth profile from a perfect involute for several reasons in an attempt to minimize Transmission Error and gear noise.

However, they typically cannot eliminate all gear noise. Some companies are better than others. Some vehicles within a given company are better than others. Just because a company labels itself as the "luxury" arm of an auto company, that does not mean that they are great at everything that they implement. I have seen bad gear designs that just needed to be thrown out they were so noisy. While others, were close to being quiet, and just needed to be tweaked slightly.

Automobile companies are very sensitive to price too! So do not expect the auto companies to just fix a bad gear design and pass the cost onto the consumer. Plus, some companies just have "average" gear designers that do not even know how to improve a given gear design.


The gear whine frequency varies with engine speed with a given gear ratio and this is known as the mesh frequency. As an example, if the pinion shaft is rotating at 120 rpm, it has a rotation frequency of 2 Hz. If the pinion has 100 teeth, the mesh frquency is (2 Hz)*(100)=200 Hz. The meshing is not a pure sine wave, so the mesh frequency also creates harmonic frequencies at 400, 600, 800, 1000 Hz, etc.


Once you notice gear noise, it is typically difficult to tune it out, but again, it is not indicative of a failure.
 

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List model year: 03
Date/Mileage TW was first observed: 135k
Current mileage: 143k
Symptoms: Transmission began slipping. Transmission failed at 139k miles.
Did TW worsen over the above time periods? YES
Dealer response and/or corrective actions: Remanufactured transmission

Cost: $2500. Acura services covered the rest.
Mileage TW was addressed by Dealer: 139k
Did you contact your local Client Services (Owners.Acura.com)? Enter Case #. n/a
Current status of TW. Working Great after replacement.
 

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2006 MDX grinding during acceleration only

2006 MDX Touring /w Nav
grinding noise during acceleration only.
No noise during highway driving.
Noise noticed most when torque needed most.
Heard at speeds between 10-40 MPH.
146,000 miles when noticed first.
Brought to dealer who stated its normal noise for age of car.
Will call dealer if problem gets worse.
Could I expect some after warranty assistance with such high mileage if problem continues? I'd love to get some kind of discount given there transmission issues but is this laughable at this point? I mean really 146,000 miles and asking for a discount? I will of course try anything for a discount.:)
 

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2006 MDX Touring /w Nav
grinding noise during acceleration only.
No noise during highway driving.
Noise noticed most when torque needed most.
Heard at speeds between 10-40 MPH.
146,000 miles when noticed first.
Brought to dealer who stated its normal noise for age of car.
Will call dealer if problem gets worse.
Could I expect some after warranty assistance with such high mileage if problem continues? I'd love to get some kind of discount given there transmission issues but is this laughable at this point? I mean really 146,000 miles and asking for a discount? I will of course try anything for a discount.:)

I would not expect any assistance from Acura for an 8 year old car whether it is a known issue or not.
 

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List model year: 2002

Date/Mileage TW was first observed: Jan 2009/83,000 miles

Current mileage: 157,000 miles

Symptoms: Loud whining which increased on turns at low speeds, thus when putting car in Reverse. Now there is a loud grinding when the car is put in Drive or Reverse.

Did TW worsen over the above time periods?: Always worsened. The transmission has been changed twice, once at 83,000 miles and once at 118,000 miles.

Dealer response and/or corrective actions:

Cost

1st transmission replacement @ 83,000 miles was covered under extended warranty

2nd transmission replacement @ 118,000 miles was goodwill 75%/self-pay 25%, so I paid around $1,200

3rd transmission replacement - I go to the dealer on Monday, so I'll let you guys know.
 

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So each replacement transmission lasted roughly 30-40K miles, except that the original one lasted 83K miles?

I am beginning to suspect that Honda/Acura did not really "remanufacture" these transmissions, but sourced them out to some shady low-cost rebuilders.

As for me, I have three 2001 MDX but can only provide history on one which has been in the family since new. The other two are bought used much later.

TW started at 90K miles

Does get slightly louder with time, but not really noticeable.

Currently at 180K miles and still working fine.
 

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So each replacement transmission lasted roughly 30-40K miles, except that the original one lasted 83K miles?
Yes for the last two transmissions. I bought the car certified pre-owned at 29,000, so I don't know if it had the transmission replaced before that. If it didn't, the first transmission lasted 83,000 miles, and if it did, the transmission lasted anywhere from 64K-83K.


I am beginning to suspect that Honda/Acura did not really "remanufacture" these transmissions, but sourced them out to some shady low-cost rebuilders.
I think the design of the 01-02 models is flawed, and a transmission just won't last.

I'm going to the dealer tomorrow. Even though I'm technically 3.5K miles out of warranty, the problem started way before that with a low transmission whine. I'm going to explain that to the service manager, and hopefully he agrees to replace the transmission.
 

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2006 Touring/ Nav

68,000 miles

I have noticed the whine for 4-5K miles.

Am thinking to have the fluid flushed at local place I have been going to for 10 years. Good idea? Maybe the fluid has lost it's viscosity?

I notice it when it's warmed up and under load. When it's cold it does not do this.
 

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The whine does not necessarily come from the transmission.

Start the car but do not put it in gear, then turn the steering in both directions to see if it starts whining. If it does, then it's the O-ring on the P/S pump, not the transmission.

Even if the whine does come from the transmission, it's just an annoyance, not a real problem unless the transmission starts slipping.

Even though I have always advocated replacing the fluid often, doing so might only calm down the whine a little, but would not eliminate it completely. It comes from the under-load misalignment of the 3 (for '01-'02) or 4 (for '03-'06) parallel shafts due to wear on the aluminum bores of the shaft bearings. There is really nothing one could do short of disassembling the transmission and repairing the case bearing bores.
 
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