Rear Diff Bearings Already

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16PW
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Rear Diff Bearings Already

Post by 16PW » Thu Oct 18, 2018 4:36 pm

I took my 16 PW into the dealer for a recall and a few other issues. One of them being a whine coming from the rear. The truck only has 29k miles and only 3k is from me. Just got a call from the dealer today saying the rear needs new bearings. Pretty crazy with a truck with such low miles, but oh well. That will be a new rear end and my rental is a new challenger with a 5.7 hemi so thats pretty fun to drive. I'm glad I stuck with buying a used truck that still has a bumper to bumper warranty.

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Reloaderguy
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Re: Rear Diff Bearings Already

Post by Reloaderguy » Thu Oct 18, 2018 4:57 pm

What are the odds the gears were set up wrong from the factory and the dealer is incompetent so they're throwing parts at it? Makes you wonder if that's why the truck was traded in after the dealer couldn't fix it and told the previous owner it was normal.
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16PW
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Re: Rear Diff Bearings Already

Post by 16PW » Thu Oct 18, 2018 5:08 pm

Reloaderguy wrote:
Thu Oct 18, 2018 4:57 pm
What are the odds the gears were set up wrong from the factory and the dealer is incompetent so they're throwing parts at it? Makes you wonder if that's why the truck was traded in after the dealer couldn't fix it and told the previous owner it was normal.
That is definitely possible. I have a little faith in them since they are a big dealer and have probably the biggest shop in AZ, but I do know how dealers are and how much their mechanics can suck so we'll see. If I continue to have problems, I'll just take it right back to them. Its been in the shop for a few days now so I signed up for a rental agreement with them that only costs about $110. That will provide a rental car for the next 2 years whenever I need when dropping my truck off. Keeping my fingers crossed though!

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DamageWagon
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Re: Rear Diff Bearings Already

Post by DamageWagon » Thu Oct 18, 2018 10:41 pm

You could have them show you the rear end, if it’s ring gear wear it will be very visible.

Good bearings tend to either last a VERY long time, or die a crib death. Imperfections in material, assembly, install, damage before/during install can all manifest that way. You could also get 500,000 miles out of a normal set in the same application.

TwinStick
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Re: Rear Diff Bearings Already

Post by TwinStick » Fri Oct 19, 2018 1:03 am

So, if oil level was at proper "factory height", & there is no obvious wear in ring gear or pinion, how would this be possible ? Did previous owner do some water crossings ? I think i'd ask about the fluids condition & level, if they inspected it.

Keep us posted please. :popcorn:
In WNY State. 2008 Red QC PW G56. No lift yet, stock size tires. It pulls an 18' 2016 Starcraft AR One Extreme, 3500 lbs.
Load Pro 35 helper springs. 2015 A.R.E. MX Series custom cap. PCP front diff cover protector. Mag-Hytec 6 qt rear diff cover. K&N replacement air filter only. Dual grounded throttle body. Winch TPC bypass. Fab Four rear bumper. DURA BAK lined rocker protection. And a bunch of new front end stuff.

G-56 Gear ratios: 1st) 6.29:1 2nd) 3.48:1 3rd) 2.10:1 4th) 1.38:1 5th) 1.0:1 6th) 0.79:1 Rev 6.29:1 --- = 78.01613:1 Crawl Ratio
-------------------------5.94:1--------3.28:1-------1.98:1-------1.31:1-------1.0:1-------0.74:1-----5.42:1 ---- = 73.675:1
545RFE----------------3.0:1---------1.67:1--------1.0:1--------0.75:1-------0.67:1------------------3.0:1 -------=37.21:1

2013+ 32.47 crawl ratio...............Can you see the trend ??????????????

RustyPW
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Re: Rear Diff Bearings Already

Post by RustyPW » Fri Oct 19, 2018 3:25 am

TwinStick wrote:
Fri Oct 19, 2018 1:03 am
So, if oil level was at proper "factory height", & there is no obvious wear in ring gear or pinion, how would this be possible ? Did previous owner do some water crossings ? I think i'd ask about the fluids condition & level, if they inspected it.

Keep us posted please. :popcorn:
I've seen brand new roller and taper bearings fail with in hours of install at the power plant. And seen roller and taper bearings operating non-stop 24/7 for the whole time I was at the power plant. 13 years. Doing a lube change. A spec of dirt floating around in the lube gets on a ball of the bearing or the race. Puts an imprint on the ball or race. From there, it's down hill to failure. Everytime that imprint makes contact with either the ball or race. It leaves another imprint. It only takes a few seconds to wipe out a roller or taper bearing.

Be nice if they started to do a bearing vibration analysis on it. Then you could pin point which bearing was failing. But the equipment and training isn't cheap.
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Mods to the PW; Nerffed Mopar RockRails, Wheel Well Liners, Bushwacker Pocket Fender Flairs, Garvmin dezl 560LMT GPS, Power Wagon Winch Kit, Line X Ultra Bed Liner, PIAA Headlight Bulbs, PIAA 580 Driving Lights (135 watt), PIAA 520 Fog Lights (135 watt), PIAA 520 ATP Off-Road Lights (135 watt), Locker Bypass, Modifed Rockcrusher Diff Covers, Mopar Utility Bed Rails and Tool Box, Warn Winch Wireless Remote Control, "el-cheapo" Inclinometer, Airaid CAI, Winch TPS Bypass, 35" Toyo's, Mopar Spare Tire Lock, 'T' Steering Linkage, Modifed PSC Steering Brace, P3 Brake Controller, Modifed Fusion "mall crawler" rear bumper , PIAA 1500 Back-Up Lights, 1Ton HEMI Tranny Cooler, Leer 100XR Bed Cap, Factory Tow Mirrors, CenterLine Rims 17x9-5.25 BS, Mag-Hytec Tranny Pan, AutoMeter Gauges, PSC Extreme Hydro Assist Steering, Carli G2 Track Bar, Carli Ball-Joints, Dynatrac FreeSpin Hubs, Snorkel, RCV Axles, EBC Pads & Rotors, Aluminess Front Bumper, 14,000 lb Pul-Pal, 60" Extreme Hi-lift Jack, and more riggin' equipment, Carli Long Travel Air Bags, Bilstein 7100 Shocks - Carli Valving, Carli Control Arms, Thuren 3" SoftRide Springs, Thuren Rear Shackles, MagnaFlow Muffler, Crown Stainless Brake Lines, MORE STUFF COMIN'.

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Reloaderguy
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Re: Rear Diff Bearings Already

Post by Reloaderguy » Fri Oct 19, 2018 11:30 am

This has been discussed extensively on other forums. Dealerships are rarely qualified to set up gears. They normally throw parts at the problem until it's fixed or they give up. If after the bearings are changed it still isn't fixed you're better off paying an axle shop to reset up the gears.
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16PW
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Re: Rear Diff Bearings Already

Post by 16PW » Fri Oct 19, 2018 2:55 pm

They did tell me the fluid was pretty dirty. Other than that they didn't give me much info. I will definitely give you guys an update once I get the truck back next week.

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Re: Rear Diff Bearings Already

Post by TwinStick » Fri Oct 19, 2018 9:49 pm

Maybe i am just dumb & outdated........but how expensive can rear wheel bearings be & how hard are they to install in a "free floating" rear axle ? I thought you just remove the tire, unbolt the free floating hub, pull out the axle shaft, remove clip, use spanner wrench to remove spindle nut, remove hub, pull out the bearings & punch out the races, clean thoroughly, re-install new races & pre-lubed bearings & re-assemble, maybe with a new axle flange gasket if needed ? Catching the axle rear fluid - if you forget to high side the side your working on. Top off fluid & that's it, right ? I would also change fluid & clean the lockers. No sense installing new bearing & races if there is debris in the oil.

https://www.youtube.com/watch?v=yIT8djTxt6o I don't exactly approve of every method he uses in this vid, but it shows the process.

Dealer should have checked this & done it, if needed. NOT difficult, just time consuming. Shame on the dealer & it's workers if they won't or can't do this ! Shame on FCA if they won't "authorize" this repair. I have had ZERO formal training & I could do this job.
In WNY State. 2008 Red QC PW G56. No lift yet, stock size tires. It pulls an 18' 2016 Starcraft AR One Extreme, 3500 lbs.
Load Pro 35 helper springs. 2015 A.R.E. MX Series custom cap. PCP front diff cover protector. Mag-Hytec 6 qt rear diff cover. K&N replacement air filter only. Dual grounded throttle body. Winch TPC bypass. Fab Four rear bumper. DURA BAK lined rocker protection. And a bunch of new front end stuff.

G-56 Gear ratios: 1st) 6.29:1 2nd) 3.48:1 3rd) 2.10:1 4th) 1.38:1 5th) 1.0:1 6th) 0.79:1 Rev 6.29:1 --- = 78.01613:1 Crawl Ratio
-------------------------5.94:1--------3.28:1-------1.98:1-------1.31:1-------1.0:1-------0.74:1-----5.42:1 ---- = 73.675:1
545RFE----------------3.0:1---------1.67:1--------1.0:1--------0.75:1-------0.67:1------------------3.0:1 -------=37.21:1

2013+ 32.47 crawl ratio...............Can you see the trend ??????????????

RustyPW
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Re: Rear Diff Bearings Already

Post by RustyPW » Fri Oct 19, 2018 10:47 pm

Nothing was mentioned about wheel bearings. The talk is about the carrier and pinion bearings. Whole nother ball game.
PWOC #53
2008 POWER WAGON RC
Mods to the PW; Nerffed Mopar RockRails, Wheel Well Liners, Bushwacker Pocket Fender Flairs, Garvmin dezl 560LMT GPS, Power Wagon Winch Kit, Line X Ultra Bed Liner, PIAA Headlight Bulbs, PIAA 580 Driving Lights (135 watt), PIAA 520 Fog Lights (135 watt), PIAA 520 ATP Off-Road Lights (135 watt), Locker Bypass, Modifed Rockcrusher Diff Covers, Mopar Utility Bed Rails and Tool Box, Warn Winch Wireless Remote Control, "el-cheapo" Inclinometer, Airaid CAI, Winch TPS Bypass, 35" Toyo's, Mopar Spare Tire Lock, 'T' Steering Linkage, Modifed PSC Steering Brace, P3 Brake Controller, Modifed Fusion "mall crawler" rear bumper , PIAA 1500 Back-Up Lights, 1Ton HEMI Tranny Cooler, Leer 100XR Bed Cap, Factory Tow Mirrors, CenterLine Rims 17x9-5.25 BS, Mag-Hytec Tranny Pan, AutoMeter Gauges, PSC Extreme Hydro Assist Steering, Carli G2 Track Bar, Carli Ball-Joints, Dynatrac FreeSpin Hubs, Snorkel, RCV Axles, EBC Pads & Rotors, Aluminess Front Bumper, 14,000 lb Pul-Pal, 60" Extreme Hi-lift Jack, and more riggin' equipment, Carli Long Travel Air Bags, Bilstein 7100 Shocks - Carli Valving, Carli Control Arms, Thuren 3" SoftRide Springs, Thuren Rear Shackles, MagnaFlow Muffler, Crown Stainless Brake Lines, MORE STUFF COMIN'.

Moab '10, '12, '14.
Rausch Creek Spring-Fall '11, Spring '12, Summer '13, Summer '14, Summer '15, Summer '16, Summer '17, Summer '18,
Russ NRA Benefactor Member

TwinStick
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Re: Rear Diff Bearings Already

Post by TwinStick » Thu Oct 25, 2018 7:21 pm

So, then if it is the bearings on either side of the diff, they should be submerged in oil right ? How could they be bad already unless they were set up wrong from the factory ? Could a worn pinion bearing allow enough slop to cause things to shift enough to trash the carrier bearings ? I'm just trying to learn here. :geek:
In WNY State. 2008 Red QC PW G56. No lift yet, stock size tires. It pulls an 18' 2016 Starcraft AR One Extreme, 3500 lbs.
Load Pro 35 helper springs. 2015 A.R.E. MX Series custom cap. PCP front diff cover protector. Mag-Hytec 6 qt rear diff cover. K&N replacement air filter only. Dual grounded throttle body. Winch TPC bypass. Fab Four rear bumper. DURA BAK lined rocker protection. And a bunch of new front end stuff.

G-56 Gear ratios: 1st) 6.29:1 2nd) 3.48:1 3rd) 2.10:1 4th) 1.38:1 5th) 1.0:1 6th) 0.79:1 Rev 6.29:1 --- = 78.01613:1 Crawl Ratio
-------------------------5.94:1--------3.28:1-------1.98:1-------1.31:1-------1.0:1-------0.74:1-----5.42:1 ---- = 73.675:1
545RFE----------------3.0:1---------1.67:1--------1.0:1--------0.75:1-------0.67:1------------------3.0:1 -------=37.21:1

2013+ 32.47 crawl ratio...............Can you see the trend ??????????????

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