N 08 Pinion nut recall: From bad to worse...
Thread Starter
|
Professional
Joined: Sep 2011
Posts: 163
Likes: 0
My Ram is out of warranty. In Canada, we only get 100,000 km (60,000 mile) powertrain warranty. With respect to the Check Engine light, original diagnosis was O2 sensor and throttle body. After service, CEL came back on immediately. Powertrain Control Module was replaced...4 days later CEL came back on. Cleared code and re-flashed PCM. Light off for one day. Replaced catalytic converter. So far (5 days) CEL has stayed off.
As far as the pinion nut recall problem, when I heard the loud roar from the differential I dropped the truck off at the dealer. They provided a loaner/rental. Expect to hear from dealer tomorrow what the problem with the differential is and when truck will be fixed.
As far as the pinion nut recall problem, when I heard the loud roar from the differential I dropped the truck off at the dealer. They provided a loaner/rental. Expect to hear from dealer tomorrow what the problem with the differential is and when truck will be fixed.
Record Breaker
Joined: Jan 2010
Posts: 1,400
Likes: 5
From: San Pedro, California
My Ram is out of warranty. In Canada, we only get 100,000 km (60,000 mile) powertrain warranty. With respect to the Check Engine light, original diagnosis was O2 sensor and throttle body. After service, CEL came back on immediately. Powertrain Control Module was replaced...4 days later CEL came back on. Cleared code and re-flashed PCM. Light off for one day. Replaced catalytic converter. So far (5 days) CEL has stayed off.
As far as the pinion nut recall problem, when I heard the loud roar from the differential I dropped the truck off at the dealer. They provided a loaner/rental. Expect to hear from dealer tomorrow what the problem with the differential is and when truck will be fixed.
As far as the pinion nut recall problem, when I heard the loud roar from the differential I dropped the truck off at the dealer. They provided a loaner/rental. Expect to hear from dealer tomorrow what the problem with the differential is and when truck will be fixed.
Thread Starter
|
Professional
Joined: Sep 2011
Posts: 163
Likes: 0
Emission's warranty in Canada was reduced to 130,000 km (80,000 miles). I'm just passed that. Dealer has covered a portion of the cost for Check Engine light repairs under "goodwill" as I had just passed the mileage restriction to have it covered by warranty, and they made several repairs that did not correct the problem.
Thread Starter
|
Professional
Joined: Sep 2011
Posts: 163
Likes: 0
Pinion Nut N 08 Recall update...
I got my truck back from the dealer yesterday, and the work order said "recondition rear axle / Recall N 08". A long list of parts installed including another pinion nut and retainer, drive pinion seal, drive pinion bearing spacer, drive pinion bearing kit, drive pinion bearing, bearing kit-differential side, and 3 quarts of 75w140 fluid. All covered under the recall. Drove truck yesterday and all day today and rear diff is nice and quiet.
I can only speculate as to why all the bearings went within 3 hours of the dealer installing the new pinion nut and retainer. The diff was quiet before the recall work, so they did something wrong. My guess is they just took off the old nut and put on a new one (with retainer) and because they didn't use a new crush washer they didn't get proper torque/preload. The Service Manager's explanation was that because the nut was found loose during a previous inspection (they tightened it and applied Loctite) that the bearings had worn unevenly. Then when they put a new nut on with retainer it "changed the angle of things" and the bearings wore out. In 3 hours?
Between my recurring Check Engine Light and the Pinion Nut recall, a lot of components on my truck have been replaced. All recall related parts of course were no charge, and the dealer paid for my rental vehicle. My truck is out of warranty (just out of emissions warranty) but between the dealer and Chrysler they covered most of the component cost. A new catalytic converter was required to finally resolve the CEL, and Chrysler paid half the cost of the part, and the dealer didn't charge installation labor. It's been frustrating making so many trips to the dealer, but I give them credit for covering most of the cost and I'm comfortable now with the pinion nut recall finally done and all bearings replaced.
I can only speculate as to why all the bearings went within 3 hours of the dealer installing the new pinion nut and retainer. The diff was quiet before the recall work, so they did something wrong. My guess is they just took off the old nut and put on a new one (with retainer) and because they didn't use a new crush washer they didn't get proper torque/preload. The Service Manager's explanation was that because the nut was found loose during a previous inspection (they tightened it and applied Loctite) that the bearings had worn unevenly. Then when they put a new nut on with retainer it "changed the angle of things" and the bearings wore out. In 3 hours?
Between my recurring Check Engine Light and the Pinion Nut recall, a lot of components on my truck have been replaced. All recall related parts of course were no charge, and the dealer paid for my rental vehicle. My truck is out of warranty (just out of emissions warranty) but between the dealer and Chrysler they covered most of the component cost. A new catalytic converter was required to finally resolve the CEL, and Chrysler paid half the cost of the part, and the dealer didn't charge installation labor. It's been frustrating making so many trips to the dealer, but I give them credit for covering most of the cost and I'm comfortable now with the pinion nut recall finally done and all bearings replaced.
Site Moderator-Dodge Tech
Joined: Sep 2010
Posts: 3,724
Likes: 22
From: Nashville, Tennessee
I got my truck back from the dealer yesterday, and the work order said "recondition rear axle / Recall N 08". A long list of parts installed including another pinion nut and retainer, drive pinion seal, drive pinion bearing spacer, drive pinion bearing kit, drive pinion bearing, bearing kit-differential side, and 3 quarts of 75w140 fluid. All covered under the recall. Drove truck yesterday and all day today and rear diff is nice and quiet.
I can only speculate as to why all the bearings went within 3 hours of the dealer installing the new pinion nut and retainer. The diff was quiet before the recall work, so they did something wrong. My guess is they just took off the old nut and put on a new one (with retainer) and because they didn't use a new crush washer they didn't get proper torque/preload. The Service Manager's explanation was that because the nut was found loose during a previous inspection (they tightened it and applied Loctite) that the bearings had worn unevenly. Then when they put a new nut on with retainer it "changed the angle of things" and the bearings wore out. In 3 hours?
I can only speculate as to why all the bearings went within 3 hours of the dealer installing the new pinion nut and retainer. The diff was quiet before the recall work, so they did something wrong. My guess is they just took off the old nut and put on a new one (with retainer) and because they didn't use a new crush washer they didn't get proper torque/preload. The Service Manager's explanation was that because the nut was found loose during a previous inspection (they tightened it and applied Loctite) that the bearings had worn unevenly. Then when they put a new nut on with retainer it "changed the angle of things" and the bearings wore out. In 3 hours?
Thread Starter
|
Professional
Joined: Sep 2011
Posts: 163
Likes: 0
I'm not an expert, but based on what I've learned so far I would say you are exactly right. The service manager did say the bearings were "chewed up". The rear diff was quiet prior to the recall (new nut and retainer) and then sounded like it was going to fall apart 3 hours later. Have to believe something was wrong with torque/preload and as you note the used bearing ground itself to death.
Registered User
Joined: Jan 2007
Posts: 6
Likes: 0
Does anybody have access to the actual procedures from Chrysler? I had the N08 recall done a couple weeks back with no previous issues and no issues since. Prior to the recall I asked the service manager what they were going to do exactly. She said the tech would decide if the current pinion nut had backed off, if it had they would refurbish the differential and my truck would be there until the end of the day. If the nut had not backed off then they would replace it with a new style of nut which they call a "retainer" and I would have my truck back in one hour.
I asked how they could ensure the proper bearing preload if not replacing the crush sleeve and if they would have to check the backlash after this service, the look on her face told me she did not understand my words. The only answer I was given was that they would follow the procedure from Chrysler.
No cost to me, my truck is a 2010 3 years old as of June but I still have the same questions on how they are ensuring the proper setup of the preload and ring and pinion alignment? Are people going to have premature differential failures after this recall?
I asked how they could ensure the proper bearing preload if not replacing the crush sleeve and if they would have to check the backlash after this service, the look on her face told me she did not understand my words. The only answer I was given was that they would follow the procedure from Chrysler.
No cost to me, my truck is a 2010 3 years old as of June but I still have the same questions on how they are ensuring the proper setup of the preload and ring and pinion alignment? Are people going to have premature differential failures after this recall?
Site Moderator-Dodge Tech
Joined: Sep 2010
Posts: 3,724
Likes: 22
From: Nashville, Tennessee
Does anybody have access to the actual procedures from Chrysler? I had the N08 recall done a couple weeks back with no previous issues and no issues since. Prior to the recall I asked the service manager what they were going to do exactly. She said the tech would decide if the current pinion nut had backed off, if it had they would refurbish the differential and my truck would be there until the end of the day. If the nut had not backed off then they would replace it with a new style of nut which they call a "retainer" and I would have my truck back in one hour.
I asked how they could ensure the proper bearing preload if not replacing the crush sleeve and if they would have to check the backlash after this service, the look on her face told me she did not understand my words. The only answer I was given was that they would follow the procedure from Chrysler.
No cost to me, my truck is a 2010 3 years old as of June but I still have the same questions on how they are ensuring the proper setup of the preload and ring and pinion alignment? Are people going to have premature differential failures after this recall?
I asked how they could ensure the proper bearing preload if not replacing the crush sleeve and if they would have to check the backlash after this service, the look on her face told me she did not understand my words. The only answer I was given was that they would follow the procedure from Chrysler.
No cost to me, my truck is a 2010 3 years old as of June but I still have the same questions on how they are ensuring the proper setup of the preload and ring and pinion alignment? Are people going to have premature differential failures after this recall?
Record Breaker
Joined: Apr 2010
Posts: 1,387
Likes: 1
From: MN
Does anybody have access to the actual procedures from Chrysler? I had the N08 recall done a couple weeks back with no previous issues and no issues since. Prior to the recall I asked the service manager what they were going to do exactly. She said the tech would decide if the current pinion nut had backed off, if it had they would refurbish the differential and my truck would be there until the end of the day. If the nut had not backed off then they would replace it with a new style of nut which they call a "retainer" and I would have my truck back in one hour.
I asked how they could ensure the proper bearing preload if not replacing the crush sleeve and if they would have to check the backlash after this service, the look on her face told me she did not understand my words. The only answer I was given was that they would follow the procedure from Chrysler.
No cost to me, my truck is a 2010 3 years old as of June but I still have the same questions on how they are ensuring the proper setup of the preload and ring and pinion alignment? Are people going to have premature differential failures after this recall?
I asked how they could ensure the proper bearing preload if not replacing the crush sleeve and if they would have to check the backlash after this service, the look on her face told me she did not understand my words. The only answer I was given was that they would follow the procedure from Chrysler.
No cost to me, my truck is a 2010 3 years old as of June but I still have the same questions on how they are ensuring the proper setup of the preload and ring and pinion alignment? Are people going to have premature differential failures after this recall?
Rob