proper way to break in diff gears

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Sep 24, 2007 | 06:59 PM
  #11  
RE: proper way to break in diff gears
BIG...loooooooooooooooong...BURNOUT!
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Sep 24, 2007 | 07:24 PM
  #12  
RE: proper way to break in diff gears
On a new set of gears? yikes.
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Sep 24, 2007 | 07:30 PM
  #13  
RE: proper way to break in diff gears
Quote:
ORIGINAL: aim4squirrels

On a new set of gears? yikes.
I hope that EVERYONE knows that I am not being serious. Please do not try this! Or if you do, let us know how it all goes down...
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Sep 24, 2007 | 07:37 PM
  #14  
RE: proper way to break in diff gears
Quote:
ORIGINAL: AAA4948

Quote:
ORIGINAL: aim4squirrels

On a new set of gears? yikes.
I hope that EVERYONE knows that I am not being serious. Please do not try this! Or if you do, let us know how it all goes down...
Thanks , next thread will be help quick , my gears are making noise or the truck does not move.... HELP FAST , QUICK or what ever these post start...lol.
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Sep 24, 2007 | 08:58 PM
  #15  
RE: proper way to break in diff gears
LOL, yes I did know you were kidding.

the thought of a solidly fused ball of steel residing where my rear differential used to be was slightly amusing for a second.
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Sep 24, 2007 | 08:59 PM
  #16  
RE: proper way to break in diff gears
Any answers as to how to reprogram the speedo though?
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Sep 24, 2007 | 09:08 PM
  #17  
RE: proper way to break in diff gears
Quote:
ORIGINAL: sabbath1994

run 15 miles cool it down.. drive 100 miles cool it down// at 500 miles change it... i put royal purple in mined.. then again at 1000 miles i changed it.. now i plan on doing it every 3000... so it depends hhow you treat the truck
Every 3000 miles? That honestly is a waste of money, the oil does not ever begin to break down at that low of millage. 10k miles is even on the low side for many people, especially if your running Syn.

Quote:
ORIGINAL: aim4squirrels
Okay so next question,

The owners manual says 75w90 and the service manual says 80w90. Which is the safer one to go with? I always run synthetics BTW.
A difference of 5w isn;t going to make a difference what so ever, I would just stick with 80w90

Quote:
ORIGINAL: HankL

I have also read about gently driving the truck in large circles, both clockwise and then counter-clockwise, in a large parking lot before doing the oil change at 500 miles.
This made me laugh, it would make no difference other then wasting some of your time. Unless you switch from CW to CCW for tire wear hahaha

Quote:
ORIGINAL: EricCartman

I have seen an R&P that was not properly broken in - and it was UGLY! The ring gear was excessively worn and rounded, and it had less than 200 miles on it. I wish I had a picture of it with me. Might have to stop by the local off road shop to snap a picture of it...
This more or less has to so with improper set up 90% of the time. I have seen my buddies do the whole break in procedure and still shred a R&P and I have seen them NOT do a break in and they're fine. The guy who shreds them is just dumb, hes gone through two Ford 9" R&Ps in in under 3000 miles. First set he did break in and they were toast after 1000 miles (hes dumb and set them up wrong) second time he did not do break in and they lasted about the same, 1000-1500 miles and they were toast from his wrong install again. It was kinda funny, I dunno if he didn;t use any compound or what, but the pattern on the drive side ran off the Ring, so when he pulled it out the edge was literally like a razor. Kinda cool to play with.

Fortunately they had lifetime warranties no questions asked.

Well anyways aims4squirals, if you do a similar break procedure to what have been posted with synthetic oils and are easy on the skinny pedal for 500ish miles you'll be okay, assuming you have a good install. Make sure they warranty it!

Personally I would just let it cool after 20-30 miles, then (if I was on a highway trip or something) let them cool at 100 miles. Then just go easy on her for a while and change the fluid at 500 and call it good from there!

Just my experiences and opinion.

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Sep 24, 2007 | 09:22 PM
  #18  
RE: proper way to break in diff gears
Quote:
ORIGINAL: Socha_62

Quote:
ORIGINAL: aim4squirrels
Okay so next question,

The owners manual says 75w90 and the service manual says 80w90. Which is the safer one to go with? I always run synthetics BTW.
A difference of 5w isn;t going to make a difference what so ever, I would just stick with 80w90

That didn't seem like a huge deal either, just curious as to why there werethe two differing numbers. Thought maybe the service manual was written after the owners manual and that was an update I had missed. I don't tow or load up very often so the 75w140 isn't an issue.

As far as the driving in circles, that was recommended to me to mix up the friction modifier when I had the corporate trac-lock, but the Trutrac works without it. Most of the synthetics nowadays have it includedI believe.
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Sep 24, 2007 | 09:32 PM
  #19  
RE: proper way to break in diff gears
Quote:
ORIGINAL: Socha_62

Quote:
ORIGINAL: HankL

I have also read about gently driving the truck in large circles, both clockwise and then counter-clockwise, in a large parking lot before doing the oil change at 500 miles.
This made me laugh, it would make no difference other then wasting some of your time. Unless you switch from CW to CCW for tire wear hahaha

[/quote]

This is only for LSDs. If you add the Kendall or similar addative for limited slip, you're supposed to do some figure eights to get the clutch faces nice and soaked with the fresh additive. I turned a few figure eights nice and easy after I changed the fluid and added the Kendall additive, but I still get a few one tire fires now and then. Most of the time I lay down two tracks though...
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Sep 25, 2007 | 06:55 AM
  #20  
RE: proper way to break in diff gears
The early Nissan Titans had a lot of trouble with the Dana Super44 differential they used...same as the one tried for a while in the rear of the Dodge Viper.

One of the automotive magazines had a Titan tear up its diff while they were doing a towing test, and in the course of the dealership repair the magazine talked about a differential break-in proceedure they had to do. Perhaps a search of Titan repair proceedures would turn up what Dana recommends.

I also distinctly remember that when the new Titan was announced several Ram owners with extensive off-road experience in trucks and jeeps predicted in advance that the Dana 44 would turn out to be a a problem in the Titan...and they turned out right!


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