gear pattern check please

S

shmoken875

NAXJA Forum User

Location

Blacksburg VA/ Bel Air MD

• Jul 21, 2007

• #1

Lemme know what you think, as long as its ok I'm ok with it, doesnt have to be perfect cause the only tool I'm working with is a micrometer, no dial indicator or anything. Gimme some tips or opinions if yo got them. Thanks.
Drive side:

coast:

 

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Brett M

NAXJA Forum User

Location

Salt Lake City Ut

• Jul 21, 2007

• #2

It doesn't even look to me like the gears are getting close enough to each other. Usually a gear pattern will look this:

You can see where the teeth are rubbing the marking compound off in the middle of each tooth....


Somethings wrong on yours.......

 

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terryd

NAXJA Forum User

Location

Elk Creek/Covington Va

• Jul 21, 2007

• #3

r-dog, hold the ring gear with your hand and rotate the pinion in the direction of foward, then hold the pinion and rotate in the direction of coast, it'll give you better results. also, paint the ring gear heavily with the marker, from the base of the tooth twards the tip so its perpendicular to the direction the gears mesh in. post up after that. if you dont think you got it, i can help you when you get it down here!

 

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shmoken875

NAXJA Forum User

Location

Blacksburg VA/ Bel Air MD

• Jul 21, 2007

• #4

heh, I've always had it backwards then, I thought you wanted for paint to be left not pushed away lol. OK did it again check this coast looks good to me, can't tell too well on drive.

 

M

MoFo

NAXJA Forum User

NAXJA Memorial Lifetime Member

Location

Near Rochester NY

• Jul 21, 2007

• #5

You can't tell anything from these patterns, without first setting backlash. You MUST set the backlash before you can pull a pattern that means anything. I was in Harbour Freight about 2 weeks ago and they had dial indicators on sale for $8 and change. While you are there, pick up a magnetic base for the indicator. If you can afford the gears, spend the money on the basic tools. Otherwise, you may likely end up buying another set of gears!

 

RyanM

NAXJA Forum User

Location

va

• Jul 21, 2007

• #6

x2, If its a trail rig only then MAYBE i'd run it. If i got to "feel" it first

 

jeeperjohn

NAXJA Forum User

Location

Temecula, CA

• Jul 22, 2007

• #7

You need to clean all the compound off the ring gear and paint only 4-5 teeth in two spots across from each other. Turn the ring gear by hand while applying resistance to the pinion gear. Go over the painted spots on the ring gear about 4 times each in both directions. First you need to make sure the backlash is in the ballpark as mentioned before.

 

Frank Z

NAXJA Forum User

Location

Colorado Springs

• Jul 22, 2007

• #8

jeeperjohn said:

You need to clean all the compound off the ring gear and paint only 4-5 teeth in two spots across from each other. Turn the ring gear by hand while applying resistance to the pinion gear.

Click to expand...

What he said. I'd suggest clreaning off all of the marking compound with brake parts cleaner, add a light coat of oil to the bearings only and re-check the pattern. I find a shop towel wrapped around the pinion yolk ( twisted and held tightly) offers the right amount of resistance to give you a good pattern to read.

 

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shmoken875

NAXJA Forum User

Location

Blacksburg VA/ Bel Air MD

• Jul 22, 2007

• #9

alright so I finally caved and got the dial indicator, I had the backlash perfect at .008, so I tried again and coated the piss out of the teeth and put a good bit of drag on the ring gear and got this: looks like the pinion might be a bit too far away.

 

Last edited: Jul 22, 2007

RyanM

NAXJA Forum User

Location

va

• Jul 23, 2007

• #10

good choice on the dial indicator. what is your pinion preload

 

Last edited: Jul 23, 2007

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foreman1063

NAXJA Forum User

Location

NC

• Jul 23, 2007

• #11

It does appear that your pinion is a little shallow but your getting close.

 

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shmoken875

NAXJA Forum User

Location

Blacksburg VA/ Bel Air MD

• Jul 23, 2007

• #12

RyanM said:

good choice on the dial indicator. what is your pinion preload

Click to expand...

15 inch lbs, so yall think its worth it to tear the whole thing down and throw another .0025 or so behind the pinion or no?

 

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shmoken875

NAXJA Forum User

Location

Blacksburg VA/ Bel Air MD

• Jul 23, 2007

• #13

foreman1063 said:

It does appear that your pinion is a little shallow but your getting close.

Click to expand...

meh, I might just leave it, posted it on my clubs website and the consensus is to just run it rather than rick throwing everything outta wack

 

RyanM

NAXJA Forum User

Location

va

• Jul 23, 2007

• #14

shmoken875 said:

15 inch lbs, so yall think its worth it to tear the whole thing down and throw another .0025 or so behind the pinion or no?

Click to expand...

yes. I got a good pattern using .002 increments

 

Frank Z

NAXJA Forum User

Location

Colorado Springs

• Jul 23, 2007

• #15

Yep, it's worth the extra time to get a better pattern.

 

M

MoFo

NAXJA Forum User

NAXJA Memorial Lifetime Member

Location

Near Rochester NY

• Jul 23, 2007

• #16

I would add another .002 on the pinion and pull another pattern.

 

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sigmund

NAXJA Forum User

Location

USA

• Jul 23, 2007

• #17

You're nuts to pull it, it's good just like it is. You stand the chance of going too far if you add more, it'll work fine as is.

 

jeeperjohn

NAXJA Forum User

Location

Temecula, CA

• Jul 23, 2007

• #18

shmoken875 said:

15 inch lbs, so yall think its worth it to tear the whole thing down and throw another .0025 or so behind the pinion or no?

Click to expand...

You need to go deeper on the pinion. Time spent now getting the right pattern will be no time spent later replacing broken or worn parts. With diffs "good enough" is not.