Ok to install used gears?

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Puma297

NAXJA Forum User

Location

NC

• Apr 8, 2005

• #1

Well, I am currently building up a HP30 to go in my ZJ. I plan on running 4.56's and a true-track. I am just curious as to he problems of installing used gears instead of new ones. Since I'm on a college budget I'm trying to build it up somewhat cheaply but I don't want to cut corners and it cause me a busted R&P.

I know that when gears are set up they have to wear in but is it true that if I dont set up the gears within 0.001 of how they were set originally I am going to have a howling front end?

 

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JJacobs

NAXJA Forum User

Location

Fort Collins CO

• Apr 8, 2005

• #2

I'd do it on an axle with unlockable hubs. On your 30 though, it's a roll of the dice. Odds are it'll be noisy.

 

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Puma297

NAXJA Forum User

Location

NC

• Apr 8, 2005

• #3

what if i added some warn lockable hubs?

 

XJhammer

NAXJA Forum User

Location

Westminster, CO

• Apr 8, 2005

• #4

New gears would be cheaper at that point....

 

Yucca-Man

NAXJA Member # 683

Location

Castle Rock, CO

• Apr 8, 2005

• #5

XJhammer said:

New gears would be cheaper at that point....

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x2...and quieter, too.

 

luvdaxj

NAXJA Forum User

Location

Sonoma

• Apr 8, 2005

• #6

XJhammer said:

New gears would be cheaper at that point....

Click to expand...

They come with a warranty also. My brother blew two sets of 4.56's in his TJ because the shop didn't set them right. I told him it was because he drove a TJ.

 

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Planetcat

NAXJA Forum User

Location

NorCal

• Apr 10, 2005

• #7

I installed used 4.56's in my front D30 with a detroit true trac (new). The shop that did the work and had the gears was very reputable, so I went with it. It saved me $100 and I didn't have to break them in. I guess hearing from others I was lucky, but I'd do it again if it saved $$ and break in time.

 

old_man

NAXJA Forum User

Location

Loveland, Colorado

• Apr 10, 2005

• #8

I've run used gears for years. They can be ticky to set up and tend to be more noisy, but they are a viable option, especially if you set them up yourself so you don't have so much money in setup.

 

rock rash

NAXJA Forum User

Location

Anywhere USA

• Apr 10, 2005

• #9

old_man said:

especially if you set them up yourself so you don't have so much money in setup.

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That is if you know what you are doing and do it well.:laugh3:

 

xuv-this

bondo afficianado

Location

southwest VA.

• Apr 10, 2005

• #10

you are pretty certain to get some noise with used gears. whether they break or not, as well as how much noise they make is determined by how much time is taken in setup. you might ask some local shops about if they would charge more for installing used gears. i put a set of 4.10 used in my front, and setup took around 6 or 7 hours for everything. it's kinda hard to describe here, but the wear pattern just doesn't "like" it's new diff, and it takes longer to get it right.