I wouldn't give the same shop a second chance...the Nogalitos Gear name sounds impressive enough for me, lol! If you can, try and watch them to learn something from it to share on the forum. I'm guessing your pinion gear was set too loose for one...causing everything else to get out of whack but could be wrong. Ask them what they find while you watch or after if not... i'm curious!

 

It's not the gears, it's the install. I've had Genuines in my truck for over 4 years and 30,000 miles. They have NEVER made a sound! At my most recent fluid change (3rd time if you include the break in oil) they looked perfect.

They are popular in my area because of the lifetime warranty and I know about a dozen guys with them. ALL have either had them installed at 4 Wheel Parts in Orlando (who has had the same axle tech for about 7 years who is good) or a local 4x4 shop who again, has a guy on staff who ONLY does axle work.

To date, my gears and Auburn LSD are the ONLY mods that I've not done myself. Gears are just about impossible to set on the first try unless you have a lot of experience at it.

Problem with most 4 Wheel Parts stores is that they pay at the extreme lower end of the scale and therefore either don't get or don't keep good mechanics!

To the OP: MAKE THEM get it right and MAKE THEM show you your gears as they open the pumpkin. ANY signs of metal flakes or uneven wear in the ring or pinion and MAKE THEM install a new set!

IT'S NOT THE BRAND OF GEARS! 3rd Gen (and 2nd Gen for that matter) has horror stories about EVERY brand, including Mopar. It's the install 99% of the time.

I bought the Auburn as well for 2 reasons. First, I had one in my 2nd Gen and when I sold it, 68k miles later, it still performed flawlessly. Second, I was tempted to try a DTT, but at the time I had my gears done, Detroit was being bought out by Eaton and the DTT for the Chrysler 9.25" was back-ordered 6-8 weeks. I didn't want to have to spend for labor all over again.

Don't forget to ONLY use a conventional oil in the rear with the Auburn. I use Lucas and change every 15k, as opposed to my front where I use synthetic and go 30k between changes...

 

Damn... you change the diff oil every 15k?

 

Dunno what the book says for a 4th gen, but you run the same axle I do and my book calls for synthetic (which of course I can't do because Auburn HATES synthetic), every 30k or 15k with severe use or towing.

Since I run a conventional AND I tow on occasion, I change it religiously at 15k. The front, like I stated, I run Royal Purple and change it every second time I change the rear.

And one more thing for the OP: Don't forget to add the friction modifier, the Auburn will chatter like a summbiotch without it...

 

I've never had a diff go out on a vehicle from bad oil and I've never changed dif oil. I'll probably keep the original oil in this truck for 100k miles or maybe 50k just to be safe

 

If you want the lifetime powertrain warranty honored, you better change it at 30K like the manual says.

 

I'll take my chances with the differential. Like I said, I 've never had issues with diff oil and don't know anyone who has. Even if I did change the oil every 30k my dealer would probably blame me if something did happen to the diff and I don't keep receipts.

 

I thought the same way as you for many of my trucks including this one, until last month when the rear end went out. I think there are 4 members here on the board with toasted rear differentials. Mine went at 37K, but one guys went out at 8K.

Bill

 

I called 4x4 Parts about a 4.10 setup and the first thing the parts guy told me was that these gears are going to whine. They have a warning flag pop up in their system for Chrysler 9.25" rear end wanting 4.10's to tell the customer that the gears are going to whine and that there is nothing that 4x4 Parts will or can do after the install. I told him to forget it.

Bill

 

Probably a smart move Bill and one I've been wishing I made the last few weeks.

I stopped by Nogalitos Gear today and talked with them. I'm very impressed with everything I saw. They basically repeated everything everyone has said here, that the gears shouldn't whine unless the installation was screwed up. When I told them about 4 Wheel Parts and everything that had been done and said, they kind of chuckled and told me that I would have had better luck taking it to the local high school's auto shop. Since they specialize in transmissions and gears, they've got a couple of guys who do gears 90% of their time and help out the other techs when they're not working on them. While I was there they had a 3rd Gen RAM work truck up on the lift with it's pumpkin open. They were doing a gear swap on it after the owner had hit something and caused all the fluid to drain out and then smoked the gears. Overall I got a positive feeling from the place. They quoted me at $300 to install the OEM 4.10s that I'd already bought, and they can do the work in a day if I have the truck there when they open.

Hammer, is there a specific weight of fluid do you run in your rear?