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09-18-2021, 04:04 PM
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#1
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Senior Member
Tiffin Owners Club
Join Date: Sep 2021
Posts: 141
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Oil spray out of rear lug nuts
I’ve had this used coach for just over 2 weeks. I was going over things with an RV driving school instructor when he pointed out what appears to be evidence of oil spraying out around the lug nuts on a rear tire. It’s black, greasy and slightly worse on one side of the wheel than the other, but pretty much all the way around. The pattern is such that it looks like it is coming from behind each lug nut. It wasn’t there when I took delivery and is not on any other wheel. It doesn’t look like anything I drove through but looks like something spraying outward from each nut. Any thoughts? Thanks in advance for your help.It’s a 2017 Tiffin Allegro. Bus.
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09-18-2021, 04:21 PM
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#2
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Senior Member
Join Date: Feb 2020
Location: NY State
Posts: 3,089
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Knowing what the rig is, and on what chassis, might be helpful...you can add that info to your signature lines as many of us have done.
But it sure sounds like a bad axle seal. Someone needs to (a) check the differential fluid level, preferably before the coach moves again if things are really wet, and (b) pull the wheels and such to check the seal, replacing if necessary.
__________________
John
1976 Southwind 28', '96 Winnie 34WK,
2006 Tiffin Allegro Bus 40QDP
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09-18-2021, 04:23 PM
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#3
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Senior Member
Join Date: Oct 2002
Location: Madison, MS
Posts: 10,521
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Most likely a leaking seal on the axle. All rear axles are filled with lube oil and even though the seal is on the center of the axle, centrifugal force slings it around the wheel and it works its way out of the lug nut holes. Any medium duty truck shop should be able to re-seal it, and replace the fluid as necessary.
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09-18-2021, 04:25 PM
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#4
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Senior Member
Tiffin Owners Club
Join Date: Sep 2021
Posts: 141
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Quote:
Originally Posted by n2zon
Knowing what the rig is, and on what chassis, might be helpful...you can add that info to your signature lines as many of us have done.
But it sure sounds like a bad axle seal. Someone needs to (a) check the differential fluid level, preferably before the coach moves again if things are really wet, and (b) pull the wheels and such to check the seal, replacing if necessary.
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I have a 2017 Tiffin Allegro Bus. I did make a signature, but for some reason it didn’t show up. New to this. Thanks!
__________________
Helen Mitchell
2017 Tiffin Allegro Bus w PowerGlide Chassis, 37AP
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09-18-2021, 05:15 PM
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#5
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Senior Member
Join Date: Apr 2018
Posts: 3,441
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Pictures of your axle would go along way into getting responses
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09-18-2021, 05:33 PM
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#6
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Senior Member
Join Date: Dec 2009
Location: Out there, somewhere
Posts: 9,867
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Well John,
I doubt it's an axle seal, could be but, I doubt it. Especially since it all-of-a-sudden started. 99.999999999999% of the axle seals I've either replaced or at least seen, leak on THE BACK SIDE of the wheels, normally around the brake drums and or disc shoes. The front side, where the axle is held in place, is held on at the end of the hub by 8 or so large type bolts. It's incredibly rare for that part to leak.
Second, if I had to guess without seeing the actual area in question, It's also potentially possible that, the last technician that did any axle, brake or tire work, possibly put some anti-seize or grease or heavy oil onto the threads of the lug studs to help lube the lug nuts when re-installing them. And, the centrifugal force of the wheel spinning might, just might, have caused some of that oil or grease or whatever to migrate outwards to the point you now see it. Just a guess here.
If you look around on here, you'll find out how to post pics so, if you take any, you can post it/them on here and we could better analyze it for you.
Scott
__________________
2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '20 Honda NC750X DCT
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Heidi character, (mini Schnauzer)!
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09-18-2021, 07:52 PM
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#7
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Senior Member
Tiffin Owners Club
Join Date: Sep 2021
Posts: 141
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I’m not sure how to post pictures here. We did photograph it to send to technician but they aren’t open over the weekend.
__________________
Helen Mitchell
2017 Tiffin Allegro Bus w PowerGlide Chassis, 37AP
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09-18-2021, 09:30 PM
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#8
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Senior Member
Join Date: Feb 2019
Location: Foley, AL
Posts: 256
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Usually caused by wheellug nut torque. Retorque to specs.
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09-18-2021, 11:26 PM
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#9
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Senior Member
Join Date: Dec 2019
Location: Canyon Lake, Texas
Posts: 3,020
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Possibly just thread lubricant. Take the center cap off and see if the outer axle seal is leaking. Pop the lug nut covers off and make sure the lugs are tight. Clean the wheel and keep an eye on it. Look for oil on the inner tire.
__________________
2002 American Tradition 40'
Cummins 8.3, Banks 431hp, 1260 tq
Canyon Lake, TX
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09-18-2021, 11:26 PM
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#10
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Senior Member
Join Date: Jul 2014
Posts: 35,317
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The axle has a gasket ( seal ) or silicon sealant on it, where it meets the wheel hub.
If thats failed, oil will be seen in the lug nut area.
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09-19-2021, 05:14 AM
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#11
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Senior Member
Join Date: Mar 2019
Location: Braidwood Il.
Posts: 8,300
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Well used gear lube like from a diff. has pretty distinct smell, and I would expect some gear lube to have been slung at least into inside of hub cover. Do you have alum. rims remove center hub or remove simulator for a look and sniff.
__________________
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k
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09-19-2021, 07:15 AM
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#12
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Senior Member
Holiday Rambler Owners Club
Join Date: Apr 2020
Location: Farmington Hills, Michigan
Posts: 973
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Quote:
Originally Posted by hmitchmd
I’m not sure how to post pictures here. We did photograph it to send to technician but they aren’t open over the weekend.
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Scroll down to: Manage Attachments --> Browse (select file/pic) --> Upload
There are some limitations on what kind and size files can be attached.
__________________
2004 Holiday Rambler Imperial 40PKD, Cummins ISL 400
2019 Buick Envision AWD
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09-19-2021, 07:52 AM
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#13
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Senior Member
Join Date: Nov 2013
Location: Elko, Nv
Posts: 2,416
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What glennabbot said.
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09-19-2021, 10:08 AM
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#14
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Senior Member
Join Date: Dec 2019
Location: Canyon Lake, Texas
Posts: 3,020
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Quote:
Originally Posted by NevadaNick
What glennabbot said.
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I don’t disagree, But is it coming from under the lug nuts or the lug nut covers. OP also hasn’t clarified if it has simulators or aluminum wheels.
__________________
2002 American Tradition 40'
Cummins 8.3, Banks 431hp, 1260 tq
Canyon Lake, TX
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