3.20 pro gear for a 9" - Yellow Bullet Forums

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Old 10-12-2009, 05:35 PM   #1
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Default 3.20 pro gear for a 9"

anyone make one??? My car currenlty had a Nodular Iron case with Moser 40 spline axles with a 4.10 pro gear... I need a 3.20ish gear.. What to do, and what will I need???

I'm not to savvy on the 9" stuff...
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Old 10-13-2009, 09:21 AM   #2
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Default Re: 3.20 pro gear for a 9"

There was a 3.40 available awhile back but it is no longer in production. The 3.50 is on back order till next month.


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Old 10-13-2009, 09:40 AM   #3
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Default Re: 3.20 pro gear for a 9"

Subscribing.

I couldn't find one when I looked earlier this year. The guy at Strange actually laughed at me when I inquired about one. I explained how a gear in that range is very helpful for the guys who are limited to a 28" tall tire. Especially with the 275 drag radial classes showing up every where now. He just kept laughing.
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Old 10-13-2009, 10:19 AM   #4
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Default Re: 3.20 pro gear for a 9"

Scott weren't there oddball size Nascar gears?
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Old 10-13-2009, 11:47 AM   #5
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Default Re: 3.20 pro gear for a 9"

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Scott weren't there oddball size Nascar gears?

Nope, special production run. If you have something drawn up you can have a 200 piece run of that gear ratio. Tom Reider was very good at this but he is no longer in business. The only answer at this time is to have a street gear annealed to attain the gear ratio desired. We do offer this process as well.


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Old 10-13-2009, 12:30 PM   #6
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Default Re: 3.20 pro gear for a 9"

Scott, how much does it cost to have a single gearset annealed?

I would imagine it would be more cost effective to put several in the oven at once. Do they use a static oven or a conveyer system? If it is a static oven how many gearsets can be cooked at once??

Thanks
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Old 10-13-2009, 12:38 PM   #7
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Default Re: 3.20 pro gear for a 9"

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Originally Posted by gryphon68 View Post
Scott, how much does it cost to have a single gearset annealed?

I would imagine it would be more cost effective to put several in the oven at once. Do they use a static oven or a conveyer system? If it is a static oven how many gearsets can be cooked at once??

Thanks

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I haven't done any batch runs and I'm not sure on which process is used. I know the gear set is at about 60 rockwell and it is softened 5-8 points on the rockwell scale. I verify each set myself and they do vary some.

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Old 10-13-2009, 12:39 PM   #8
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Default Re: 3.20 pro gear for a 9"

I know I have a 3.40, thought they made a 3.20 too. Try calling Mark Williams, might have one
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Old 10-13-2009, 12:58 PM   #9
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Default Re: 3.20 pro gear for a 9"

You can still get a 3.40 pro gear from Mark Williams in a large pin..
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Old 10-13-2009, 01:32 PM   #10
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Default Re: 3.20 pro gear for a 9"

Unless I am way off, a Pro set of gears is usually made from 9310 steel and a standard set from 8620. Both are carburizing grades but have different mechanical properities. Tempering a standard set back (not annealing) will increase the core toughness but will sacrifice surface hardness.
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Old 10-19-2009, 12:19 AM   #11
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Default Re: 3.20 pro gear for a 9"

Try calling Cal Gear (Chrisman Driveline). I know that he had some a few years ago. Also I believe that there should be a 2.90 gear available for the A-fuel guys if that will work. I do have a new set of 3.20 9 1/2" gears with a 40 spline pinion with a MW pinion support $450.00 plus shipping if anyone is interested.

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Old 10-19-2009, 01:03 AM   #12
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Default Re: 3.20 pro gear for a 9"

I HAVE 3.40 S IM BOUT TO USE
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