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Re: One more differential question

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D Slater

02-21-2013 07:33:15

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Specs for backlash with new gears was .006 to .015. Can't remember finding any used ones under .010 and consider it lucky if I find them .015 or under. On used try for contact center from halfway of the pinion tooth toward the rear of the pinion at hand load. From the undercut part of the ring gear toward the edge of the tooth, get pattern center a little over half way toward the tooth edge. Pattern will get rear close to the tooth edge on some at hand pressure. Some will have a wide pattern and are hard to figure. This is just in the ballpark for used parts. Like someone else posted, new is not a option for most. If you can still get them a main shaft was over $400 or $500 the last I knew. Zach I bought some items from Marty before knowing they probably wasn't described real accurate. Lucked out until the last time I bought a ring and pinion for a 340. When they arrived my wife could tell they were junk. Looked worse than the ones you removed. Didn't get mad because I was dumb enough to chance it knowing all his descriptions for all items couldn't be accurate. Saw some items he has since that I would bid on if he wasn't the seller.

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Zachary Hoyt

02-21-2013 10:01:01

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 Re: One more differential question in reply to D Slater, 02-21-2013 07:33:15  
Thank you for the advice, I will swap the shims back so that the back lash is less. I will open it back up again when it gets warmer and either check the pattern again or swap in the other set. I figure it is a gamble with any used set so I will just hope for the best. Keeping on tearing it down in the cold was starting to feel like a recurring nightmare of some kind. I have bought a few parts from Marty, knowing his reputation and have done okay so far but I know I am on thin ice. I just bought a spare starter along with the differential parts and it is in good shape but the relay got crushed in shipping since it was rattling around with the transmission shaft. I figured I would rather have a spare gear set in case I ended up needing it than have it get scrapped, but if anyone else had bid they would have won.

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