Whining Noise from Rear End - Page 2

kodabear99 · 06-30-2009, 04:08 PM

I almost missed seeing your post directing me to the Installation Guide.

Thank you so much.

kodabear99 · 06-30-2009, 05:48 PM

I forgot to tell you something. About 2 months ago when I was out of town, a mechanic said the gear oil was low in the differential and that it had been throwing oil underneath my vehicle. He told me he replaced the seal and changed the gear oil.

The mechanic originally told me that if there was a problem with the rear end that he would have to do more extensive repairs. When I picked up the vehicle, he said it just needed the seal and gear oil.

When the whining started a few days ago, the fluid level was below the filler hole, so I was going to top it off, thinking that he had not filled it completely. Instead, I decided I should look at the existing fluid, and when I saw it was dark colored, I decided to go ahead and replace the fluid and add the friction additive.

My neighbor also saw the particles in the gear oil I removed, and he said they looked more like varnish flakes that you might see after cleaning a carburator -- that they didn't look like metal.

Is it possible the mechanic did something wrong? Or, since the oil was so dark ---- maybe he didn't change it at all?????

56 Ford · 06-30-2009, 07:38 PM

Isn't 2 months an awfully short time for "new" gear oil to start looking bad?

kodabear99 · 06-30-2009, 07:52 PM

That was my thought, too, 56 Ford.

Oil looked too bad to be good (relatively new)!!!

When replacing a seal, is it also necessary to adjust the pinion bearing or pinion bearing preload? I was reading somewhere if the noise occurred only during deceleration, that it was usually caused by Pinion bearing or preload.

Sorry if I seem to be dense, but I do learn as I go.

bradrhale · 06-30-2009, 07:54 PM

it is common practice for alot of these shops to drain the oil and then put new oil in there leaving the junk and gunk in the bottom to contaminate the new fluid. after all, who wants to go the extra distance and make sure everything is clean unless it is the actual owner of the vehicle.
gear oil is the life blood for the bearings. it is very possible that the lack of fluid started the bearing chatter and like a worn tire, gets worse over time no matter what you do to prevent the inevitable. did he do you wrong?? maybe not. he was hired to fix a leak and refill. he probably did do that but missed out on a sale on further labor. maybe he did check it out and knew that you would be back. noone can really tell and i will not help to accuse him of wrong doings. the discoloration of the fluid is due to extreme heat. this is EXTREMELY devastating to a rear end and can only mean that you do in fact have bearing problems. flakes are not allowed in there either for future referance.
no problem on the find. i kinda knew where to look so i went ahead and found it for ya.

kodabear99 · 06-30-2009, 09:52 PM

AWESOME information and suggestions! Thank you so much for your help. Now I need to find a reputable shop in Houston, Texas. Recommendations would be appreciated (if allowed)......

BRADRHALE ROCKS

bradrhale · 07-01-2009, 06:46 AM

houston huh?? PM mrjohnwayne as he lives in that area and might know someone around there that he likes. he is our resident ford diesel man and knows his stuff. if he says they are good to go, then id stand behind what he says. he is good for it. if i had more time on my hands, id shoot down there and help you out, but time has become an asset that keeps coming up short for me and on top of the 150 mile drive down there, i just couldnt lie to you like that. but thanks for the vote of confidence, nonetheless.

tjzz4 · 07-01-2009, 07:49 AM

If he changed the pinion seal it is very possible he didn`t get the bearing preload set correctly. I have seen bearings fail in as little as 40 miles after seal replacement and as much as 500. preload is critical. Done correctly, the pinion should be removed and a new crush sleeve installed and preload adjusted with the carrier removed.

bradrhale · 07-01-2009, 10:17 AM

^^couldnt agree more.^^ but which seal did he replace?? the housing seal or pinion seal??
40 miles sure is a short trip. that thing must have been way out of adjustment.

kodabear99 · 07-02-2009, 08:19 PM

Yikes - I'm having withdrawal pains. Had no cable service for TV and internet all day yesterday and part of today. Hence the slow response.

Thank you again Brad. I posted a message for MrJohnWayne and will await his suggestion/recommendation.

I

to your expertise and assistance.

Now I'm a

camper.

07-01-2009, 07:49 AM	#18
tjzz4 Senior Member Join Date: Oct 2007 Posts: 276	If he changed the pinion seal it is very possible he didn`t get the bearing preload set correctly. I have seen bearings fail in as little as 40 miles after seal replacement and as much as 500. preload is critical. Done correctly, the pinion should be removed and a new crush sleeve installed and preload adjusted with the carrier removed. Last edited by tjzz4; 07-02-2009 at 02:03 PM.

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06-30-2009, 04:08 PM	#11
kodabear99 Full Member Join Date: Jun 2009 Location: Texas Posts: 19	I almost missed seeing your post directing me to the Installation Guide. Thank you so much.

06-30-2009, 05:48 PM	#12
kodabear99 Full Member Join Date: Jun 2009 Location: Texas Posts: 19	I forgot to tell you something. About 2 months ago when I was out of town, a mechanic said the gear oil was low in the differential and that it had been throwing oil underneath my vehicle. He told me he replaced the seal and changed the gear oil. The mechanic originally told me that if there was a problem with the rear end that he would have to do more extensive repairs. When I picked up the vehicle, he said it just needed the seal and gear oil. When the whining started a few days ago, the fluid level was below the filler hole, so I was going to top it off, thinking that he had not filled it completely. Instead, I decided I should look at the existing fluid, and when I saw it was dark colored, I decided to go ahead and replace the fluid and add the friction additive. My neighbor also saw the particles in the gear oil I removed, and he said they looked more like varnish flakes that you might see after cleaning a carburator -- that they didn't look like metal. Is it possible the mechanic did something wrong? Or, since the oil was so dark ---- maybe he didn't change it at all?????

06-30-2009, 07:38 PM	#13
56 Ford Junior Member Join Date: Apr 2009 Posts: 8	Isn't 2 months an awfully short time for "new" gear oil to start looking bad?

06-30-2009, 07:52 PM	#14
kodabear99 Full Member Join Date: Jun 2009 Location: Texas Posts: 19	That was my thought, too, 56 Ford. Oil looked too bad to be good (relatively new)!!! When replacing a seal, is it also necessary to adjust the pinion bearing or pinion bearing preload? I was reading somewhere if the noise occurred only during deceleration, that it was usually caused by Pinion bearing or preload. Sorry if I seem to be dense, but I do learn as I go.

06-30-2009, 07:54 PM	#15
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 7,831	it is common practice for alot of these shops to drain the oil and then put new oil in there leaving the junk and gunk in the bottom to contaminate the new fluid. after all, who wants to go the extra distance and make sure everything is clean unless it is the actual owner of the vehicle. gear oil is the life blood for the bearings. it is very possible that the lack of fluid started the bearing chatter and like a worn tire, gets worse over time no matter what you do to prevent the inevitable. did he do you wrong?? maybe not. he was hired to fix a leak and refill. he probably did do that but missed out on a sale on further labor. maybe he did check it out and knew that you would be back. noone can really tell and i will not help to accuse him of wrong doings. the discoloration of the fluid is due to extreme heat. this is EXTREMELY devastating to a rear end and can only mean that you do in fact have bearing problems. flakes are not allowed in there either for future referance. no problem on the find. i kinda knew where to look so i went ahead and found it for ya.

06-30-2009, 09:52 PM	#16
kodabear99 Full Member Join Date: Jun 2009 Location: Texas Posts: 19	AWESOME information and suggestions! Thank you so much for your help. Now I need to find a reputable shop in Houston, Texas. Recommendations would be appreciated (if allowed)...... BRADRHALE ROCKS

07-01-2009, 06:46 AM	#17
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 7,831	houston huh?? PM mrjohnwayne as he lives in that area and might know someone around there that he likes. he is our resident ford diesel man and knows his stuff. if he says they are good to go, then id stand behind what he says. he is good for it. if i had more time on my hands, id shoot down there and help you out, but time has become an asset that keeps coming up short for me and on top of the 150 mile drive down there, i just couldnt lie to you like that. but thanks for the vote of confidence, nonetheless.

07-01-2009, 10:17 AM	#19
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 7,831	^^couldnt agree more.^^ but which seal did he replace?? the housing seal or pinion seal?? 40 miles sure is a short trip. that thing must have been way out of adjustment.

07-02-2009, 08:19 PM	#20
kodabear99 Full Member Join Date: Jun 2009 Location: Texas Posts: 19	Yikes - I'm having withdrawal pains. Had no cable service for TV and internet all day yesterday and part of today. Hence the slow response. Thank you again Brad. I posted a message for MrJohnWayne and will await his suggestion/recommendation. I to your expertise and assistance. Now I'm a camper.