Breaking in new gears

[93Ranger4x4]

Was wondering if anyone could tell me a good breaking in method for new gears? just got my rear axle back from the shop and getting ready to throw it in the ranger this weekend. Also, how would you go about breaking the front in?

Thanks,
93ranger4x4

 

[swamprat]

http://www.4x4now.com/gt0999.htm

this should help you out

 

[4x4junkie]

That's a good page on how to do it.

Definitely change the oil at 500 miles.

 

[93Ranger4x4]

Thanks for the info!

 

[Fx4wannabe01]

no clutch drops either. lol. drive it easy...first 100 are critical i understand.

What my gear guy told me: Drive it around town for about 10miles. Then drive about 30-45mins at constant speed on the highway. Park it overnight and let it cool in temperature. After that, drive it normally, but be conceous of your new gears...drive it nicely. After 500mi, change the fluid. Breaking in new gears builds heat. heat is what kills gearsets.

 

[strvger]

i don't remember ever doing this with a new car. what is the difference between a new car with new gears, and just new gears... besides the warranty!?

 

[AllanD]

I've always followed the drive slow and gently alternating power and coast every five seconds for the first 20miles,

this gives plenty of chance for oil to flosh away any micro chips generated as the gears "run in"

but it should be noted that "new" gears aren't really "new" they are run in as part of the manufacturing process then oxide coated for shipment.

they are also what someone from the 1950's would have called "glass hard"
and are FAR less sensitive to run in proceedure than the special soft alloy
(like Nickel based "Hi-Tuff") gearsets used for drag race applications.

AD

 

[dangeranger01]

I run mine on jack stands for like 15-20min. Then let them cool for awhile. I do it like two or three times, then drive it nicely for a little bit then go home and park it. Then change the oil after about 500-1000 miles and its time to hammer down. I havnt had a set fail yet.

 

[93Ranger4x4]

What about hauling say, a Dirt bike or 4 wheeler? would that generate too much diff. heat hauling either one around? I've got a little over 200 miles on the 4.56's right now.

 

[4x4junkie]

Probably be OK as long as the 4-wheeler is not stood up on it's rear acting as a big wind anchor.