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04-09-2019, 05:59 AM
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#1
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Seasoned Camper
Join Date: Jun 2018
Location: Tifton
Posts: 62
M.O.C. #21975
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Tire Rub
When we parked our 2008 3400RL after our last outing I noticed a black mark on the driver side fender that looked like the left rear tire (Sailun S637ST 235/85) had come rubbed on the fender. Was this likely caused by hitting a bump or should I be looking for something more serious, none of the other tires left marks.
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04-09-2019, 11:06 AM
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#2
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Montana Master
Join Date: Jan 2009
Location: Centerville
Posts: 1,347
M.O.C. #9051
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Quote:
Originally Posted by TK1
When we parked our 2008 3400RL after our last outing I noticed a black mark on the driver side fender that looked like the left rear tire (Sailun S637ST 235/85) had come rubbed on the fender. Was this likely caused by hitting a bump or should I be looking for something more serious, none of the other tires left marks.
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Same fifth wheel 2008 3400RL, same black mark , except on the right side rear tire . It rubbed most likely first time out, hasn't done any harm, that was two years ago. I figure its not going to rub any worse. Forgot about it until I read your post .
I have a new set of MorRyde rubber shear springs in the garage, mine are shot. Will be replacing them in a week or so. That may be a factor on the tire rubbing.
My fifth wheel seems to bounce more then it used too. I am thinking the big splits in those shear springs are letting it bounce a lot more , will see if it improves the ride .
One thing I did notice is my Sailun's were taller then my previous Goodyear G614's same size though, 235/85/16. The Goodyears never rubbed that I noticed.
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04-09-2019, 04:08 PM
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#3
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Montana Master
Join Date: Jan 2015
Location: Taylors
Posts: 562
M.O.C. #15948
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Could be in the rim sizes. Tire dimensions are usually determined by the size of the measuring rim. GY uses 6.5" rim width for the G614. I don't have the numbers for the Sailun tires.
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04-09-2019, 05:19 PM
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#4
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Seasoned Camper
Join Date: Jun 2018
Location: Tifton
Posts: 62
M.O.C. #21975
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Thanks
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04-10-2019, 08:24 AM
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#5
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Montana Fan
Join Date: May 2013
Location: Bartlett
Posts: 196
M.O.C. #13418
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Same thing happen here. It was a busted shear spring.
__________________
Larry and Jackie Moore
2017 3950BR, MorRyde IS ,Disc.
2022 F350 SRW
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04-10-2019, 08:25 AM
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#6
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Seasoned Camper
Join Date: Jun 2018
Location: Tifton
Posts: 62
M.O.C. #21975
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Thanks
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04-10-2019, 08:48 AM
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#7
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Montana Master
Join Date: Jan 2009
Location: Centerville
Posts: 1,347
M.O.C. #9051
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Quote:
Originally Posted by LDMoore06
Same thing happen here. It was a busted shear spring.
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Although my shear springs are not busted, they are cracked pretty deep on both sides of both shear springs. I have heard of them splitting in half, it that what your shear spring did ??.
Not sure if my shear springs have anything to do with the tire rubbing on mine, my fifth wheel is not leaning to one side. Have to wonder if the fatigued or cracked shear springs cause any lose of height if they are still intact.
My neighbor, and friend installed the Sailun S637's on his Montana 235/85/16, and he also has just one tire rubbing. No damage ,but just some black marks on the fender well. Those 235/85/16's are taller.
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04-10-2019, 08:57 AM
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#8
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Montana Master
Join Date: Jan 2009
Location: Centerville
Posts: 1,347
M.O.C. #9051
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Quote:
Originally Posted by CalandLinda
Could be in the rim sizes. Tire dimensions are usually determined by the size of the measuring rim. GY uses 6.5" rim width for the G614. I don't have the numbers for the Sailun tires.
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As said the Sailuns are slightly taller then my previous G614's ,not much 31.7" compared to 32". Both ran on the same rims.
Not sure if that difference or a combination of my shear springs being shot, have something to do with the rubbing, but I have had just the one tire rub, from day one 2 years ago.
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04-10-2019, 01:02 PM
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#9
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Montana Master
Join Date: Oct 2012
Location: Box Elder
Posts: 4,677
M.O.C. #12947
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The shear springs will sag over time, even if they are not completely broken. I changed mine a while back, thinking one of them had broken, but turned out it was a broken leaf spring pack. Photo is the old next to a new one.
__________________
Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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04-10-2019, 01:11 PM
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#10
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Seasoned Camper
Join Date: Jun 2018
Location: Tifton
Posts: 62
M.O.C. #21975
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Thanks
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04-10-2019, 05:27 PM
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#11
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Montana Master
Join Date: Jan 2009
Location: Centerville
Posts: 1,347
M.O.C. #9051
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Quote:
Originally Posted by rohrmann
The shear springs will sag over time, even if they are not completely broken. I changed mine a while back, thinking one of them had broken, but turned out it was a broken leaf spring pack. Photo is the old next to a new one.
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Thanks, that pretty well answers that as far as sag. Did you notice much difference in the ride.
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04-10-2019, 10:10 PM
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#12
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Montana Master
Join Date: Oct 2012
Location: Box Elder
Posts: 4,677
M.O.C. #12947
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Yes, it did improve things, gained a bit of height, but not as much as I had hoped for, and I think the tires are wearing a bit better.
__________________
Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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04-14-2019, 02:32 PM
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#13
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Montana Fan
Join Date: Nov 2011
Location: Albany
Posts: 407
M.O.C. #11972
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Certainly worn out shear springs and suspension components can cause the fenders to rub on the tires but I have a much simpler thing to look at. Assuming that all suspension components are in proper working order, it could be as simple as UV light causing the fenders to deform and curve in toward the wheels. I probably invited the problem when I upgraded from LR E Marabombs to LR G G614s. Mine did this on both sides. All it takes to fix it is removing the screw from the center fender support bracket and bending the bracket to force the center of the fender away from the wheels. When you find the "sweet spot" using the hold in the fender as a guide, drill a new hole in the support bracket and reinstall the screw. One one fender I also had to grind away some of the plastic where it wraps under the fender. No problems since.
__________________
2012 3150RL. G614 tires. Hardwired surge protector. Level-Up Hydraulic leveling.
2013 F-350 Lariat 6.7 PSD SRW SC LB 4X4 OEM hitch, air self-leveling on rear. 57-gallon replacement fuel tank. DieselSite water separator/fuel filter.
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04-14-2019, 04:21 PM
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#14
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New Member
Join Date: Feb 2013
Location: Bay City
Posts: 8
M.O.C. #13241
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Same issue on our 2008 3605rl. Shear springs shot. MorRyde says good for 6 to 8 years. Install the wet bolt kits when you do the shear springs (equalizers).
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04-14-2019, 05:53 PM
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#15
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Established Member
Join Date: Dec 2017
Location: Palmview
Posts: 16
M.O.C. #20932
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08 3400 RL, had shear springs replaced and wet bolt kit installed. Happy with the results. Same as Rohrman stated above.
Driver side front tire was rubbing also on fender also.
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04-15-2019, 09:52 AM
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#16
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Montana Master
Join Date: Jan 2018
Location: Northville, NY
Posts: 807
M.O.C. #21158
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Quote:
Originally Posted by rohrmann
The shear springs will sag over time, even if they are not completely broken. I changed mine a while back, thinking one of them had broken, but turned out it was a broken leaf spring pack. Photo is the old next to a new one.
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Where are the shear springs located? I have MorRyde 3000 wet bolts and looking around I don't see anything that looks like your picture. I know very little about springs so I may be just not seeing what I'm looking at.
__________________
Jim B
2017 Lariat F-350 FX4, CC, SB, 6.7 PSD 4WD
2018 MONTY 3731FL, at our private winter site in GA
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04-15-2019, 02:31 PM
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#17
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Montana Master
Join Date: Feb 2005
Location: Pagosa Springs
Posts: 3,711
M.O.C. #3120
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Check your rear springs and shackles. Bet one of them is broken.
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04-15-2019, 04:27 PM
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#18
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Montana Fan
Join Date: Jun 2014
Location: Kamiah
Posts: 331
M.O.C. #14438
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Quote:
Originally Posted by simonsrf
Check your rear springs and shackles. Bet one of them is broken.
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On my 07' 3400 tire started rubbing on fender when rear shackle bracket broke letting axle to move outward.
__________________
Ron&Sue
2017 Montana 3720RL Legacy
14' Ram 3500 DRW
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04-15-2019, 07:56 PM
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#19
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Montana Fan
Join Date: May 2013
Location: Bartlett
Posts: 196
M.O.C. #13418
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Yes my shear spring was split in too.
__________________
Larry and Jackie Moore
2017 3950BR, MorRyde IS ,Disc.
2022 F350 SRW
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04-15-2019, 08:15 PM
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#20
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Montana Master
Join Date: Sep 2017
Location: Tacoma
Posts: 1,567
M.O.C. #20475
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Quote:
Originally Posted by DebNJim B
Where are the shear springs located? I have MorRyde 3000 wet bolts and looking around I don't see anything that looks like your picture. I know very little about springs so I may be just not seeing what I'm looking at.
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Your newer 3000 suspension does not have them.
__________________
Bob & Carol Washington St
2017 HC HM352RL 2018 Dodge 3500 laramie CC LB 4x4
Curt Q25 with puck system, Factory air bags
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