Differential Noise - Toyota RAV4 Forums
4.3 Mechanical Intakes, Exhaust, Tune-ups, 4x4 system, Suspension, Brakes, etc.

User Tag List

 
LinkBack Thread Tools
#1 (permalink) Old 12-20-2013, 10:01 AM
Junior Member
Country: davida2's Flag is: United States
 
Join Date: Dec 2013
Location: New Jersey
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
(Thread Starter)
Differential Noise

I'm hearing a metallic rubbing sound from the rear when leaving from a stop. If I'm on a turn, I get a bet of a metallic squeal too. I disconnected the AWD connector behind the glove box, and the sound stopped. So I think I'v isolated the problem to the rear diff or the clutch, or maybe the drive shaft.

Anyone have a similar problem or suggestions?
davida2 is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 12-20-2013, 08:05 PM
Senior Member
Country: Shep426's Flag is: United States
 
Shep426's Avatar
 
Join Date: Apr 2011
Location: Near Lk George, NY
Posts: 277
Thanks: 0
Thanked 16 Times in 15 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
The rear diff only engages on demand when the pcm senses front wheel slippage, then the transfer case engages and the rear dr shaft drives the rear diff. So disconnecting the function shouldn't do anything related to the rear diff unless for some reason was was locked up. I would check this out on a lift, look around turn the wheels and see if you hear /see anything, check the brakes also.
Shep426 is offline  
#3 (permalink) Old 12-28-2013, 12:03 AM
Junior Member
Country: davida2's Flag is: United States
 
Join Date: Dec 2013
Location: New Jersey
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
(Thread Starter)
I changed the rear diff oil today; It was nasty brown and green. used 90 wt Walmart dino oil and the noise is completely gone!
davida2 is offline  
#4 (permalink) Old 12-28-2013, 08:01 AM
Junior Member
Country: slickracer's Flag is: United States
 
Join Date: Apr 2012
Location: Pennsylvania
Posts: 25
Thanks: 1
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Good news, how many miles were on the oil?
slickracer is offline  
#5 (permalink) Old 12-28-2013, 03:51 PM
Junior Member
Country: davida2's Flag is: United States
 
Join Date: Dec 2013
Location: New Jersey
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
(Thread Starter)
The car is an 06 with about 95 k.
davida2 is offline  
#6 (permalink) Old 12-30-2013, 12:04 AM
Junior Member
Country: davida2's Flag is: United States
 
Join Date: Dec 2013
Location: New Jersey
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
(Thread Starter)
I though the rear prop shaft always turns and the rear clutch is electronically activated?
davida2 is offline  
#7 (permalink) Old 12-30-2013, 12:47 AM
Advanced Member
Country: Dr. Dyno's Flag is: United States
 
Join Date: Jan 2010
Location: Eastern CT
Posts: 4,143
Thanks: 146
Thanked 296 Times in 278 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by davida2 View Post
I thought the rear prop shaft always turns and the rear clutch is electronically activated?
That's correct. And the rear electro-coupler engages at least partially on start-off even on dry roads. That's why you heard the noise and why disconnecting the 4WD ECM stopped it. That it engages only after detecting front wheel slip is a myth.

Fred
2006 RAV4 V6 4WD Red Limited - wife's
2006 Accord V6 Hybrid - Dr. Dyno's - quick as the RAV but +8 mpg
2003 Odyssey V6 - handy people & cargo mover
1999 F-250 4X4 Diesel - snow plow, Bully Dog chip
2001 F-250 4X4 Diesel - truck camper, TS chip, 20' bike/trike dyno trailer
2004 Suzuki DRZ-400S Dual Sport

It's the pedal (or the handgrip) on the right!!
Dr. Dyno is offline  
#8 (permalink) Old 01-01-2014, 07:07 PM
Advanced Member
Country: friendly_jacek's Flag is: United States
 
friendly_jacek's Avatar
 
Join Date: Jun 2006
Location: Alabama
Posts: 2,591
Thanks: 37
Thanked 39 Times in 39 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by davida2 View Post
I changed the rear diff oil today; It was nasty brown and green. used 90 wt Walmart dino oil and the noise is completely gone!
No maintenance for the life of the car is a lie. You just gave your car another life.
friendly_jacek is offline  
Sponsored Links
Advertisement
 
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome