Motive-Richmond-Precision gears : wich is better.

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BrazilianZ28Camaro
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Motive-Richmond-Precision gears : wich is better.

Post by BrazilianZ28Camaro » Sun Jul 31, 2016 5:01 pm

Hello Gents,

I'd like to hear your personnal experience with those gears above on GM 8.5" 10 bolt posi diferential, say 4:10 to 4.56s ratios.

I'd like to know wich gear set might be stronger for drag race aplications.

Unfortunatelly I couldn't find a 9310 steel pro gears manufacturer for this axle.

Thanks is advance for the help.
'71 Z28 Pro-Street Camaro
Pump gas -T-ram - All motor SBC 427"
3308 lbs- leaf spring/Caltrac Car
29x10.5 Hoosiers
New best 1/8 mile ET
1.45 60' / 4.12 330' / 6.38@109mph :D

Casper393W
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Re: Motive-Richmond-Precision gears : wich is better.

Post by Casper393W » Fri Aug 05, 2016 6:53 am

for me its Motive everytime... I have set up countless gearsets up. You can set a Richmond up with perfect pinion depth and backlash and it will still make noise....

Andy

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BrazilianZ28Camaro
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Re: Motive-Richmond-Precision gears : wich is better.

Post by BrazilianZ28Camaro » Fri Aug 05, 2016 4:02 pm

Casper393W wrote:for me its Motive everytime... I have set up countless gearsets up. You can set a Richmond up with perfect pinion depth and backlash and it will still make noise....

Andy
Good to know this .

Have you any experience with precision gears also?

Thank you.
'71 Z28 Pro-Street Camaro
Pump gas -T-ram - All motor SBC 427"
3308 lbs- leaf spring/Caltrac Car
29x10.5 Hoosiers
New best 1/8 mile ET
1.45 60' / 4.12 330' / 6.38@109mph :D

turbo2256b
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Re: Motive-Richmond-Precision gears : wich is better.

Post by turbo2256b » Fri Aug 05, 2016 8:19 pm

Last I heard Motive owns Richmond. The better motive gears are made in Italy even so the last set of motive 3.90 gears I set up in my 8.8 were a real PITA. The pattern didnt look all that great in my book. Havent had a chance to install it in my car. My pinion depth gage didnt help at all. Ended up going from a .060 pinion shims - .004 at a time finaly looked best around .011. Took a month or so to do. Would rather do a 9" any day.

autogear
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Re: Motive-Richmond-Precision gears : wich is better.

Post by autogear » Tue Aug 09, 2016 2:03 pm

U.S. GEAR is a great source if they support your application.

bigsixman
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Re: Motive-Richmond-Precision gears : wich is better.

Post by bigsixman » Tue Aug 09, 2016 2:39 pm

I also recommend U.S. Gear.

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Re: Motive-Richmond-Precision gears : wich is better.

Post by BrazilianZ28Camaro » Tue Aug 09, 2016 6:09 pm

Unfortunatelly US gear won't make gears for my application.

I'm inclined to get the Precision gears. They seem to be very well manufactured .

Somebody have experience with those gears?
'71 Z28 Pro-Street Camaro
Pump gas -T-ram - All motor SBC 427"
3308 lbs- leaf spring/Caltrac Car
29x10.5 Hoosiers
New best 1/8 mile ET
1.45 60' / 4.12 330' / 6.38@109mph :D

blwilliams
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Re: Motive-Richmond-Precision gears : wich is better.

Post by blwilliams » Sun Aug 21, 2016 12:42 am

BrazilianZ28Camaro wrote:Unfortunatelly US gear won't make gears for my application.

I'm inclined to get the Precision gears. They seem to be very well manufactured .

Somebody have experience with those gears?
When I worked at 9" warehouse doing gear set up it was my experience the Precision gear sets were generally noisy.
The Motive and Yukon were at the top of my list for ease of installation and running quite.

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Re: Motive-Richmond-Precision gears : wich is better.

Post by Dan Timberlake » Sun Aug 21, 2016 10:24 am

If I was worried about gears shucking teeth during shock loads I'd magnaflux the gears ( new or use) I planned to use, smooth the tooth fillets, deburr the tooth edges, and have them shot=peened to MIL spec MIL-S-13165C.

http://motionsystemdesign.com/images//S ... ometry.jpg

It worked well for this guy. He was getting new gears for free from HD, but broke a few.
http://i380.photobucket.com/albums/oo25 ... 511db1.jpg

I believe some gear makers used to offer slightly softer ring and pinion sets for drag racing, with the claim the teeth were not as vulnerable to brittle failure.

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Re: Motive-Richmond-Precision gears : wich is better.

Post by BrazilianZ28Camaro » Sun Aug 21, 2016 10:56 am

Reading on Precision gears website, they claim to manufacture the gears with Gleason Gear cutting, which I believe is done to keep steel stress and distortion at minimum while being milled.

Also this process seems to produce a much better teeth finish and more importantly the teeth fillet finish.

https://www.youtube.com/watch?v=x8SXT9iMY1U

What you think?

Thanks for replies.
'71 Z28 Pro-Street Camaro
Pump gas -T-ram - All motor SBC 427"
3308 lbs- leaf spring/Caltrac Car
29x10.5 Hoosiers
New best 1/8 mile ET
1.45 60' / 4.12 330' / 6.38@109mph :D

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