Chirping Diff
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Freshman User
Joined: Jun 2002
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From: US
Chirping Diff
I recently changed diff oil. Used proper gear oil for the change and added the limited-slip additive.
Now it chirps/squeaks when moving slowly, is this anything to worry about. It didn't do it before.
Gallophill
Now it chirps/squeaks when moving slowly, is this anything to worry about. It didn't do it before.
Gallophill
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Joined: Jun 2002
Posts: 139
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From: Tucson USA
Chirping Diff
The reason I asked if you did it on a hoist or if it was a Bronco is, I have seen the c.v. joint and u-joints frozen and when the suspension hangs it breaks them loose and you then have noise and a vibration typically. Normal driving most people would never know they had a frozen u-joint or c.v. until they loaded it with some weight and changed the pinion and driveline angle enough to force the u-joint or c.v into a different position. Did you use any chemicals to clean the diff out? What type and weight of oil did you use and what type of posi additive did you use? Does the popping come at slow speeds going straight or turning slightly? Does it do this when the vehicle is hot or cold. Do you have two different size tires in the rear?
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Freshman User
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From: US
Chirping Diff
The noise is coming from the differential, my wife drove very slowly while I walked along side. Definitely from the Differential. I don't remember the gear weight, I think I took out bottles to garbage last week. But I referenced my owners' manual for the weight, I do remember it was synthetic.
Don't think it was the CV joint or the U-joint. I regularly carry a payload or pull a trailer over uneven roads or pasture. Same sounds straight or turning, weighted or unweighted.
I used parts degreaser to clean the cover, but let it dry several hours in sun,wiped out residue and blew it dry with my compressor.
The posi additive I got from the local Ford dealership. It does it hot or cold doesn't matter. All 4 wheels are same size.
Thanks for all your help.
Gallophill
Don't think it was the CV joint or the U-joint. I regularly carry a payload or pull a trailer over uneven roads or pasture. Same sounds straight or turning, weighted or unweighted.
I used parts degreaser to clean the cover, but let it dry several hours in sun,wiped out residue and blew it dry with my compressor.
The posi additive I got from the local Ford dealership. It does it hot or cold doesn't matter. All 4 wheels are same size.
Thanks for all your help.
Gallophill
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Freshman User
Joined: Jun 2002
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From: US
Chirping Diff
I think its getting worse, maybe more pronounce squeaking, sounds like an old wooden rocker on a hard wood floor.
Gallophill
Gallophill
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Senior User
Joined: Jun 2002
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From: Tucson USA
Chirping Diff
I guess next step would be pull the brake drums and have a look, could have a spring that popped off or e-brake cable rubbing something. Keep me posted.
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Freshman User
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From: US
Chirping Diff
[updated:LAST EDITED ON 31-Aug-02 AT 10:45 PM (EST)]Thanks for the help, I had a revelation this morning in the auto parts store. There were three different friction additives on the shelf. With 3 different friction levels. One said add 2oz/differential change the other said 4oz per fluid change. The man at Ford Dealer said to add whole bottle, so I didn't bother to read directions (my bad). Could I have to much friction additive. Will this hurt anything, if I can live with the squeeling or do I need to rechange the fluid and add the proper???? amount.
Senior User
Joined: Oct 2001
Posts: 258
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From: Central Virginia
Chirping Diff
Hi Gallophill, I'm pretty sure your noise is a dry u-joint likely the one at the rear's companion flange. If the noise is there going straight ahead it's not traction clutch noise because the clutches are not moving when not turning. I think if you remove the shaft from the rear end you'll find the u-joint is hard to move and no grease in a least one of the cups. Give it a check to know for sure.
Post Fiend
Joined: Nov 2001
Posts: 14,947
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From: Topsfield, MA
Chirping Diff
Couldn't you put the rear on stands so the tires are off the ground, block both sides of the the front tires, put the truck in gear and just let it turn the tires at idle and listen for where the noise is coming from.......
Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster American Thunder Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
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Check out my Gallery for a look-see.
Then theres:
99' Mustang GT 4.6L
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Primary rig is Green Thunder:
95' F-150 XLT 4x4, 302, 5 spd, MSD 6A, Flowmaster American Thunder Exhaust, Sunroof, Clear corners w/ Diamond headlights, CD player with 2 10" subs and some 32" BFG Muds
.Check out my Gallery for a look-see.
Then theres:
99' Mustang GT 4.6L
88' F-250 Heavyduty 4x4 351/c6
95' Mercury Cougar 4.6L V-8
80' E-350 300/6 with a
3 spd column shifter. Weighs around 7,000lbs w. 65mph top speed, who wants to race me!
Posting Guru
Joined: Jun 2001
Posts: 1,208
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From: Conyers
Chirping Diff
I'd have to say the U-joint also, probably dry. My truck made the same noise and I couldn't figure it out. After 3 days of tinkering, I got out the grease gun and hit EVERYTHING and away it went. Later on I pulled out that U-joint and man it was not a pretty site.
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Freshman User
Joined: Jun 2002
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From: US
Chirping Diff
Hey Everyone
I would like to thank everyone who has offered advice or help on my problem.
I has been solved or at least specifically ID'ed.
REAR WHEEL BEARINGS, both sides.
I took your advice and raised the rear and listened. Pulled the wheels and spun them by hand, squealing like a pig. BEARINGS.
I never suspected, my friend's dad's shop supposedly did the bearings 2 months ago. He has a great rep in the area, & I didn't have the time at the time.
Hopefully he will honor his work or lack of it.
Thanks Again Guys
I would like to thank everyone who has offered advice or help on my problem.
I has been solved or at least specifically ID'ed.
REAR WHEEL BEARINGS, both sides.
I took your advice and raised the rear and listened. Pulled the wheels and spun them by hand, squealing like a pig. BEARINGS.
I never suspected, my friend's dad's shop supposedly did the bearings 2 months ago. He has a great rep in the area, & I didn't have the time at the time.
Hopefully he will honor his work or lack of it.
Thanks Again Guys
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