Gear pattern question

J

josh71485

New Member

May 11, 2007

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Sep 22, 2008

#1

• Sep 22, 2008

• #1

Does it look good to you? I had no original shims to reference so I had to employ some questionable techniques to measure pinion depth. Backlash is set pretty tight (right around 7-8 thousandths) which may account for the large contact area. Mostly I just want to make sure the pinion depth is good. Give me your opinions please!

 

J

josh71485

New Member

May 11, 2007

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Sep 23, 2008

#2

• Sep 23, 2008

• #2

Someone's got to have an opinion on this. ?

 

BurningRubber

10 Year Member

Dec 6, 2004

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Sep 23, 2008

#3

• Sep 23, 2008

• #3

I'm not a gear expert by any means, so take this just as an opinion and not fact.

The backlash is a little on the tight side. Around .009 is the sweet spot, .007-.008 is probaly THE limit it should be at.

I'll try to dig up a pic I had of ideal contact marks for the pinion depth. It looks like its pretty even to me though.

 

BurningRubber

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Dec 6, 2004

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Sep 23, 2008

#4

• Sep 23, 2008

• #4

This is per Richmond gears website:

 

R.J.

Member

Aug 20, 2003

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Warwick, Rhode Island

Sep 23, 2008

#5

• Sep 23, 2008

• #5

Those marks seem a little to far to the inside, I would add shims. Also your backlash range is .008-.015 and yes 9is is best due to heat expansion. Also you carrier side to side lash should be 0.00 and you pinion pre-load should be 8-14inlbs for used bearings and 16-29inlbs for new bearings. With all of these numbers in range and you tooth contact pattern move a little more towards the center you will have a well built setup.

 

J

josh71485

New Member

May 11, 2007

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Sep 23, 2008

#6

• Sep 23, 2008

• #6

Do I need to clean the marking compound off/out before final reassembly?

 

BurningRubber

10 Year Member

Dec 6, 2004

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Sep 23, 2008

#7

• Sep 23, 2008

• #7

You should clean it off anyway to re-check everything once you make your adjustments.

It will probaly come right off with a quick shot of brake cleaner.

I would, but I doubt it will hurt squat if you dont.

 

J

josh71485

New Member

May 11, 2007

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Sep 23, 2008

#8

• Sep 23, 2008

• #8

I just changed the shims a bit. I moved the pinion about 4 thousandths farther away and got a pattern that seems more pleasing to me.

Observe-

 

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