Tranny Pump whining noise?
Thread Starter
Member
Joined: Jun 2008
Posts: 188
Likes: 1
From: Los Angeles, CA
2007 E550 Sports
Tranny Pump whining noise?
Today getting my car for a tranny flush and the service advisor says my car need a new tranny pump because they heard a high pitch whining noise. I have heard that noise for a long time already and thought it was a normal pump sound but now they want $2800 to replace the pump. Is that a fair price and have any one experienced this issue before?
MBWorld Fanatic!
Joined: Mar 2004
Posts: 5,017
Likes: 16
From: Ft. Lauderdale Area, USA
2015 ML 350
Is the trans pump whine a high pitched whine that fades in at about 10 MPH & then fades away at about 40 or so, and seems to be close to the same pitch no matter what speed (within that range) you are going?
Last edited by Barry45RPM; Apr 11, 2012 at 10:11 AM.
MBWorld Fanatic!
Joined: Jun 2010
Posts: 4,173
Likes: 7
From: Puerto Rico
2005 E55 AMG
It's does slightly change with rpms but yes, it does fade with speed and with temperature ( a cold startup will be louder than a hot startup ).
MBWorld Fanatic!
Joined: Mar 2004
Posts: 5,017
Likes: 16
From: Ft. Lauderdale Area, USA
2015 ML 350
Always had it since new... wonder If I should make them fix it under my MB ext. warranty, as I'm in my last year. Generally I hate when the dealership mucks about inside the transmission. I find they're never as good again. (FrankenTrans)
Newbie
Joined: Dec 2011
Posts: 5
Likes: 0
From: Scotch Plains, NJ
2007 E350 Sport 4Matic, 1993 Honda CBR600f2
What exactly does the trans pump do? I've always had that whine on start up and sometimes at low speed, but always assumed it was normal. Now the pitch of the pump sounds a little different (almost like it's struggling). Trans fluid was flushed by an indy about 10k ago, and the indy said everything looked fine. 2007 E3504M has 89k on the clock. Runs like a top (knock on wood).
Thread Starter
Member
Joined: Jun 2008
Posts: 188
Likes: 1
From: Los Angeles, CA
2007 E550 Sports
That's what I had assumed as well. Here is exactly what the dealer wrote:
Service Trans Per Factory Recommendation Auto Trans Service Includes Remove Trans Oil Pan, Replace Auto Trans Filtergasket Clean Trans Oil Pan And Reinstall Oil Pan Replace Up To 5 Qts $309.95
Cause: No Service Performed
no Service Performed Before Service Began, Technician Noted Loud Transmission Front Pump Whine indicating Front Pump Overheating. Recommended to Perform Replacement of Transmission Front Pump. Guest Advised.
Like you guys said, I have always noticed that when starting the vehicle and after a few seconds it will go away itself. So I always thought that was a normal sound. Can someone reassure us that is just dealer's way of making money?
Service Trans Per Factory Recommendation Auto Trans Service Includes Remove Trans Oil Pan, Replace Auto Trans Filtergasket Clean Trans Oil Pan And Reinstall Oil Pan Replace Up To 5 Qts $309.95
Cause: No Service Performed
no Service Performed Before Service Began, Technician Noted Loud Transmission Front Pump Whine indicating Front Pump Overheating. Recommended to Perform Replacement of Transmission Front Pump. Guest Advised.
Like you guys said, I have always noticed that when starting the vehicle and after a few seconds it will go away itself. So I always thought that was a normal sound. Can someone reassure us that is just dealer's way of making money?
Trending Topics
Senior Member
Joined: Aug 2011
Posts: 356
Likes: 19
From: RI
2017 S550 4matic
seems like they're fishing for $$. I have yet to hear a benz that doesn't make the same noise. How could the pump be overheating if it's submerged in fluid? That's just dumb.
Also, don't flush the fluid. Just get a good couple drain & fills. I'd never let anyone put that damn machine on my car.
Also, don't flush the fluid. Just get a good couple drain & fills. I'd never let anyone put that damn machine on my car.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
MBWorld Fanatic!
Joined: Mar 2006
Posts: 3,254
Likes: 15
From: Louisiana
03 E500 and Corvette
IF you use an NON-MB fluid in this application it is possible to have unusual noises from a pump due to the change in lubrication characteristics. If the correct fluid/filter was installed and you have pump noise with no air entrapment you may need a new pump. Note: it is hard to diagnose on line noise without hearing. It may be ok.
Thread Starter
Member
Joined: Jun 2008
Posts: 188
Likes: 1
From: Los Angeles, CA
2007 E550 Sports
But my car has never replaced the tranny fluids before and like most people here stated, I have heard this noise for a long time and always thought it was a normal sound and it will go away after a few seconds.
jcat, I was thinking more or less the same. But honestly I didn't know there is a pump for the tranny to began with.
jcat, I was thinking more or less the same. But honestly I didn't know there is a pump for the tranny to began with.
