vibration/humming in rear of car - NoPistons -Mazda Rx7 & Rx8 Rotary Forum
NoPistons -Mazda Rx7 & Rx8 Rotary Forum


2nd Generation Specific 1986-1992 Discussion

Reply
 
 
 
Thread Tools Search this Thread
Old 03-11-2008, 11:23 PM   #1  
Junior Member
Thread Starter
 
Join Date: Mar 2008
Posts: 3
Default

I have a 1988 rx7 auto trans

i just purchased this car and was informed of a vibration in the rear end, figured u-joint, tires or something in that neighborhood...

tires are fine and balanced and the u-joint seems to be fine(appears someone tried fixing the problem by replacing the driveshaft).

got the car home and make a few minor repairs to get it up and running seems to be running great but seems to really use the fuel

and doesnt seem to be as powerful as my old 84 rx7 but i kinda figure it has alot to do with the auto trans in it apposed to the stick

my old one had....any ideas why it is using so much fuel??? ok back to my main topic my vibration

the vibration/humming starts around 35 mph and continues no matter how fast your going i even tried to get going and put it up in nuetral

and the vibration was still there,

i put the car up on the lift at work and ran it up to about 40-50 mph and it was about the same as when driving it... the vibration is almost a humming meaning its a real fine vibration and it just vibrates all the plastic and makes alot of noise.... i have been driving this car 60 miles everyday and i am just affraid it is gonna come apart on me but dont have a choice since this is my only form of transpertation so i would really like to get it fixed... any help woulbe very greatfully appreciated.....thanks in advance
mburian02 is offline   Reply With Quote
Old 03-12-2008, 07:38 AM   #2  
Super Moderator
 
Join Date: Sep 2002
Location: Tallahassee, FL
Posts: 5,425
Default

Sounds like rear hub bearings.
Baldy is offline   Reply With Quote
Old 03-12-2008, 06:16 PM   #3  
Junior Member
Thread Starter
 
Join Date: Mar 2008
Posts: 3
Default

Quote:
Originally Posted by Baldy' post='896402' date='Mar 12 2008, 06:38 AM
Sounds like rear hub bearings.




is it normal for the stub axles in the rear end have a little bit of up and down play???? axle seal are not leaking so i kinda thought that it cant be all that bad.....
mburian02 is offline   Reply With Quote
Old 03-16-2008, 04:21 PM   #4  
Senior Member
 
Join Date: Oct 2003
Location: Boston Ma.
Posts: 1,420
Default

Quote:
Originally Posted by Baldy' post='896402' date='Mar 12 2008, 08:38 AM
Sounds like rear hub bearings.
Agreed.



it can get deafening if its bad enough.
RONIN FC is offline   Reply With Quote
Old 03-18-2008, 09:15 AM   #5  
Member
 
Join Date: Dec 2007
Location: Jacksonville, Fl
Posts: 72
Default

Rear hub bearings (ditto)

Here is a thought on the other issue. Had an auto 88 and the switch on the gas pedal was stuck. Used gas and was slow at bottom end bad, felt fine once the car was moving down the road. You can check it easy, it's inside on the pedal. Took it apart and cleaned mine till I got a replacement, changed the attitude of the car big time.
Fastenough is offline   Reply With Quote
Old 03-18-2008, 11:22 AM   #6  
Super Moderator
 
Join Date: Feb 2002
Location: Amityville, New York
Posts: 12,287
Default

easy thing to try is flipping the driveshaft 180 degrees
Rob x-7 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Humming with Slight Vibration...? Flangelo86 3rd Generation Specific 0 08-18-2014 09:04 PM
Bad vibration from the rear showoff247 3rd Generation Specific 2 06-02-2006 12:15 PM
Bad Vibration From Rear End, Need Help Asap! TooMuch4You 2nd Generation Specific 8 06-02-2005 12:57 PM
Huge Vibration Noise From Rear JspecRX7 2nd Generation Specific 3 10-05-2003 03:05 PM
Help: after clutch job, car now has vibration who 3rd Generation Specific 28 08-05-2002 03:50 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 01:53 AM.


© 2018 MH Sub I, LLC dba Internet Brands
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.