Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Post Reply
 
LinkBack Thread Tools Display Modes
Old 05-19-2010, 09:59 AM   #1
07 Carrera S Cab
 
Boxtaboy's Avatar
 
Join Date: Nov 2005
Location: New Jersey
Posts: 2,273
Garage
Pedro, by that logic, if it's the tires, shouldn't the "whom whom" sound be more prevalent even more when the top is down than when it is up? I have what I think is a bad rear wheel bearing sound, but I hear it more when he top is up at, and traveling at around 40mph. The sound seems prevalent even when coasting down to 5mph, but seems to disappear after 50mph. Also, when top is down, I can hardly notice the noise.

When I make a sudden turn of steering wheel, the noises do not change. When I lift the car and turn or pull on the wheel/tires, no noises. Sound has been going on for years with different sets of tires. Not loud to the point of driving me crazy, so haven't done anything about it, but is occasionally annoying.
__________________
Current: 07 Carrera S Cab in Midnight Blue

Previous: 01 Boxster in Arctic Silver, 86 944 in Guards Red
Boxtaboy is offline   Reply With Quote
Old 05-19-2010, 11:54 AM   #2
Registered User
 
jcb986's Avatar
 
Join Date: Apr 2009
Location: Orlando
Posts: 1,266
I agree with Pedro on the bearing/tire noise. When a bearing goes bad it's because grease has escape and the bearing is overheating from friction and is beginning to breakup. The sound is something like driving on a paved country road with those little rocks at the surface. You also should here it about 20-30 mph miles an hour...loudest at about 50-60. Also check your trans-axle. Have you had your alignment checked.
__________________
http://i768.photobucket.com/albums/x...6/PC120055.jpg

Old Hippie Young Heart
2000 S/3.2 Liter/Tiptronic/Boxster S Sport Package/Cruise Control/Slate Grey Metallic
Red Special Leather Interior/Red Floor Mats/Red Hand Painted Instrument Dials/Roll Bar/Windstop
Small Carbon Package/Leather Wrap Carbon Wheel/Center Console Exterior Color/Alum Carbon Shift Knob
AM/FM Radio w/CD Player & Changer/Digital Sound Package/18" Turbo Wheels/Wheel Caps w/Colored Crest
jcb986 is offline   Reply With Quote
Old 05-19-2010, 12:53 PM   #3
Registered User
 
Join Date: Jan 2010
Location: Redmond, Wa
Posts: 369
Thanks for all the great responses.
At 20mph there is no sound.. it's quiet.

How can I check my transaxle? what should I look for?

My car has 70K miles on it, I had an alignment 2 month ago.. I can't really tell if noise were there before or not since I had the alignment done 3 weeks after I bought the car.

Thanks
Sasha
sasha055 is offline   Reply With Quote
Old 05-19-2010, 04:20 PM   #4
Registered User
 
jcb986's Avatar
 
Join Date: Apr 2009
Location: Orlando
Posts: 1,266
Is your Box a stick. Have you seen any oil from around the trans where the axle connects. The diff has about one liter of 90 weight oil. If the diff gets low you can develop a roar like noise from it and only notice it at a higher speed. I would jack it up, look and see if the boots are not broken and check the trans. By narrowing down the problem areas you closer to solving your problem.

PS: I just checked on how to change the rear wheel bearing and that is a lot of work. You need to press out the old bearing and press in a new one. Find a Indy near you.
Check here to see how it's done. http://boxcar-racing.com/forum/index.php?topic=562.0
__________________
http://i768.photobucket.com/albums/x...6/PC120055.jpg

Old Hippie Young Heart
2000 S/3.2 Liter/Tiptronic/Boxster S Sport Package/Cruise Control/Slate Grey Metallic
Red Special Leather Interior/Red Floor Mats/Red Hand Painted Instrument Dials/Roll Bar/Windstop
Small Carbon Package/Leather Wrap Carbon Wheel/Center Console Exterior Color/Alum Carbon Shift Knob
AM/FM Radio w/CD Player & Changer/Digital Sound Package/18" Turbo Wheels/Wheel Caps w/Colored Crest

Last edited by jcb986; 05-19-2010 at 04:41 PM.
jcb986 is offline   Reply With Quote
Old 05-19-2010, 05:07 PM   #5
Registered User
 
Join Date: Jan 2010
Location: Redmond, Wa
Posts: 369
It's manual transmission.. and there's no oil drips on my garage floor.
How do I check oil level in differential?

Sasha
sasha055 is offline   Reply With Quote
Old 05-19-2010, 06:56 PM   #6
Registered User
 
Join Date: Jan 2010
Location: Redmond, Wa
Posts: 369
After researching differential n the net I found out that differential and transmission share the oil..

So I should just change transmission fluid right?

Also I found following link http://www.pelicanparts.com/catalog/shopcart/986M/POR_986M_SUSaxl_pg1.htm

They sell differential oil.. but they mention front and rear differential... it's confusing.. should I buy 3lt of this oil from pelicanparts and change my transmission fluid? will this solve "low differential oil problem"?

Thanks
Sasha

Last edited by sasha055; 05-19-2010 at 06:58 PM.
sasha055 is offline   Reply With Quote
Old 05-20-2010, 12:44 PM   #7
Registered User
 
Join Date: Jan 2010
Location: Redmond, Wa
Posts: 369
I inspected CV boots axle and tire wiggling all apeear to be good..

I noticed a small drip of liquid near passenger side rear tire.
It comes from something that looks like a cut rubber hose about 5cm to the center and front from CV boot. I couldn't really tell what the liquid was.. it was yellowish without smell.

Can anyone please tell me wht that "cut rubber hose" is for? and what kind of liquid could be coming from there?

Thanks
Sasha
sasha055 is offline   Reply With Quote
Post Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 09:00 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page