Freeze treating pininon gear?

art leong · 07-03-2009, 07:58 PM

I've broke a couple of pinion gears on my FWD cars. They shear on the shaft, the gear end is fine, no damage to the ring gear.
Someone suggested Cryo teating the pinion. Will this help? The pinion breaks in the middle of the shaft away from any maching.
Is there any other treatment, that will work better?

KingReptile · 07-03-2009, 09:11 PM

Cyro helps a lot of things,but I dont think it will help your problem.The pinion shaft is probally necked down where its breaking?? I would think the shaft is either too small in diameter or the it has a soft core hardness .First it twists then it shears.I would try to see if any way possible to get a 9310 set..

Jeff Lee · 07-03-2009, 11:15 PM

Not going to find a 9310 for this application! I would cryo it. You have nothing to loose and everything to gain.

Tim Bettinghouse · 07-04-2009, 06:08 AM

call jim bailey he's a nice guy and great with cryogenic. had a set of rockers done and i'am very happy

Bob Pagano · 07-04-2009, 07:32 AM

Art, Jim Baily in OH

http://finishedracing.com/

330 858 1842

Jim Bailey · 07-04-2009, 08:59 PM

Art: give me a call ... Jim Bailey ...330-858-1842

07-03-2009, 07:58 PM	#1
art leong VIP Member Join Date: Dec 2001 Location: Richmond Hill, Georgia Posts: 2,003 Likes: 0 Liked 1 Time in 1 Post	Freeze treating pininon gear? I've broke a couple of pinion gears on my FWD cars. They shear on the shaft, the gear end is fine, no damage to the ring gear. Someone suggested Cryo teating the pinion. Will this help? The pinion breaks in the middle of the shaft away from any maching. Is there any other treatment, that will work better? __________________ Art Leong 2095 SS

07-03-2009, 09:11 PM	#2
KingReptile Member Join Date: Mar 2008 Posts: 257 Likes: 0 Liked 0 Times in 0 Posts	Re: Freeze treating pininon gear? Cyro helps a lot of things,but I dont think it will help your problem.The pinion shaft is probally necked down where its breaking?? I would think the shaft is either too small in diameter or the it has a soft core hardness .First it twists then it shears.I would try to see if any way possible to get a 9310 set.. Last edited by KingReptile; 07-03-2009 at 09:13 PM.

07-03-2009, 11:15 PM	#3
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: Freeze treating pininon gear? Not going to find a 9310 for this application! I would cryo it. You have nothing to loose and everything to gain. __________________ Jeff Lee 7494 D/S '70 AMX

07-04-2009, 06:08 AM	#4
Tim Bettinghouse Junior Member Join Date: Jan 2007 Location: pierson, mi Posts: 27 Likes: 137 Liked 11 Times in 2 Posts	Re: Freeze treating pininon gear? call jim bailey he's a nice guy and great with cryogenic. had a set of rockers done and i'am very happy __________________ Tim bettinghouse 3366 STK

07-04-2009, 07:32 AM	#5
Bob Pagano VIP Member Join Date: Jun 2002 Location: New Holland, PA Mooresville,NC Posts: 1,163 Likes: 236 Liked 16 Times in 11 Posts	Re: Freeze treating pininon gear? Art, Jim Baily in OH http://finishedracing.com/ 330 858 1842 __________________ Bob Pagano A/SA

07-04-2009, 08:59 PM	#6
Jim Bailey Senior Member Join Date: Aug 2004 Posts: 673 Likes: 15 Liked 547 Times in 93 Posts	Re: Freeze treating pininon gear? Art: give me a call ... Jim Bailey ...330-858-1842