Going to be getting new gears installed at the end of the week. I've read all the conflicting do's and dont's. Here is where I need clarification. From the factory you don't have a proper break in process. Some say you have to while others say don't have to worry about it after regearing. Also I've heard to change the gear oil after 500 miles. Again from the factory that's not the case. What is a realistic way to go about taking care of my new gears? Changing the oil at 500 for me isn't a real option. It's winter here so changing it in my driveway doesn't work. I know they're lots of opinions but lets hear what is realistic!

 

You absolutely must take it easy to break the new gears in. The shop should tell you what to do. This is from a thread in this forum.

• BREAK-IN - Ring and pinion sets require a brief break-in period in order to ensure long life and quiet operation. The following procedure is required to maintain any and all warranties that apply:
1.Bring the axle to normal operating temperature by driving the vehicle unloaded for approximately 20 miles. Do not accelerate hard or create unnecessary shock loads.
2.Let the axle cool completely.
3.Operate the vehicle normally for the next 200 miles. Do not haul heavy loads or tow heavy trailer during this period.
4.For towing usage, operate the vehicle with the trailer for about 20 miles, and let the axle cool completely.
5.Avoid constant heavy towing until a total of 500 miles has been driven on the new axle.

And then yes, after 500 miles you should/must service the diffs. The main thing you are doing is looking to make sure there is not abnormal wear and tear. The diffs should be completely cracked open, inspected, cleaned, resealed, and refill.


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By the way, if you can't do it yourself take it back to the shop. The diff service shouldn't be more than $80-100 per axle depending on your area.


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I know I could but my point is, why should you when you don't when you buy it new. If need be I could find a way without spending hundreds. I gues what I'm asking is how is regearing now different than when you buy it new?

 

I follow the old rule but I've always wondered the same and when I ask ppl they can never really give you a straight answer. Probably just a mass conspiracy by retailers and the oil companies haha

 

It's not different but just imagine the new Jeep buyer being told by the dealer "Go easy with the driving otherwise you can break the gears. Oh and come back in a bit for an axle servicing at your expense". Not good for business
My Jeep I will be breaking the gears in as required, your Jeep, your call.

 

It is of you want the warranty for the gearing honored. If you don't do this and something goes wrong both the vendor and the shop can easily deny any warranty claim. It's not unusual for a regearing job go bad. Not necessarily normal, but not surprising. The faster you catch it the better. That's why you need to completely open the diffs and inspect and clean them after 500 miles or so.


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My friend had his gears installed by Teraflex. He asked them about break in. They said if its done right you are good. If they aren't done right taking it easy and changing oil won't help.

Who ever is giving you the warranty, follow their rule.

 

Engine/transmission/gear break-in is one of the many steps every vehicle goes thru before it leaves the factory.

 

It states in the information package that came with my Yukon gears to follow the break in process as stated previously and to change and inspect the fluid after 500 miles. So despite what you do with a new vehicle, id follow the gear manufacturers instructions