• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

whining noise when wheel unloads.


kurama49

New Member
Joined
Jun 26, 2010
Messages
246
Reaction score
0
Points
0
Location
Cape Breton Nova Scotia
Vehicle Year
2006
Make / Model
Ford
Engine Size
4.0L
Transmission
Manual
Hey guys, i just recently bought a 06 FX4 and lately its been making this funny noise..

If either of the wheels are unloaded, i hear a whining noise from the rear axle, and if i back up theres a slight pop noise? other than that the truck hums along fine, theres no jolting or such, only when you just take off.

Also with this truck being a FX4 shouldent it have a torsen LS? not open diff?

Plus it has a chrome diff cover which makes me think the rear might have been messed with before.
 


swynx

Active Member
Joined
Mar 26, 2008
Messages
2,401
Reaction score
9
Points
38
Age
31
Location
lewiston idaho
Vehicle Year
1994
Make / Model
Mazda
Engine Size
4.0
Transmission
Manual
have you tryed setting the e brake and backing up/ going forward. ive had them stick before and bang and what not.
 

Explorin94

Active Member
Law Enforcement
Firefighter
EMT / Paramedic
U.S. Military - Veteran
Solid Axle Swap
Joined
Aug 7, 2007
Messages
2,243
Reaction score
19
Points
38
Age
52
Location
Farmington Il.
Vehicle Year
1988
Make / Model
Ford
Engine Size
4.0
Transmission
Automatic
Take the rear cover off the rearend and inspect the carrier bearings and well as everything associated with it.
 

SenorNoob

Well-Known Member
TRS Event Participant
Joined
Oct 24, 2012
Messages
2,348
Reaction score
520
Points
113
Location
Middle Tennessee
Vehicle Year
1988
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
Total Lift
1.5" Front + 4" Rear
Tire Size
245-70-R16
I second the parking brake statement. Sounds exactly like mine and I know it's pretty bad. I just don't wanna spend the money to fix it when the disc braked 8.8 is here just about ready to go in...
 

4x4junkie

Forum Staff Member
TRS Forum Moderator
TRS 20th Anniversary
Joined
Aug 19, 2001
Messages
10,749
Reaction score
580
Points
113
Location
So. Calif (SFV)
Vehicle Year
1990
Make / Model
Bronco II
Engine Type
2.9 V6
Engine Size
2.9L V6
Transmission
Manual
2WD / 4WD
4WD
Tire Size
35x12.50R15
Also with this truck being a FX4 shouldent it have a torsen LS? not open diff?
Only if it's a "Level II" truck (you didn't mention).
 

kurama49

New Member
Joined
Jun 26, 2010
Messages
246
Reaction score
0
Points
0
Location
Cape Breton Nova Scotia
Vehicle Year
2006
Make / Model
Ford
Engine Size
4.0L
Transmission
Manual
sorry for the late reply,

The E-brake works fine, i actually just had this checked out by my mechanic when he put my new brake shoes on

The truck is not a Level II sadly

And what gear oil should i put in? and does it require LS fluid?

I'll try to see if i can get a video with my go-pro tomorrow to let you guys hear the noise better. the whine turns into a grind/growl if you accelerate hard, like if your trying to say pull out into busy traffic.
 

dla

Member
Joined
Sep 24, 2008
Messages
162
Reaction score
0
Points
16
Vehicle Year
2007
Make / Model
Ford
Transmission
Manual
sorry for the late reply,

The E-brake works fine, i actually just had this checked out by my mechanic when he put my new brake shoes on

The truck is not a Level II sadly

And what gear oil should i put in? and does it require LS fluid?

I'll try to see if i can get a video with my go-pro tomorrow to let you guys hear the noise better. the whine turns into a grind/growl if you accelerate hard, like if your trying to say pull out into busy traffic.
I would assume that the pinion has loosened, probably because the bearing is bad, and that probably because it is running with little or no oil in it.

So pull the cover and see if there is any oil in it, and look for sparklies in any oil that drains out. Backlash is near impossible to measure without a dial indicator, but grab the ring gear and rock the carrier back and forth - you should feel a very small amount of movement. If it clunks back and forth with a lot of slop then prepare yourself for some rearend work.
 

Sponsored Ad


Sponsored Ad

Staff online

Today's birthdays

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Truck of The Month


Kirby N.
March Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top