Hole drilled in pinion

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06-16-2016, 09:46 AM

midias

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Location: Henrietta NY

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Car: 1984 Trans Am L69

Engine: Sniper EFI Powered 355

Transmission: WC T5 w/ Steel Support Plate

Axle/Gears: 3.42 10 Bolt Posi

Hole drilled in pinion

I recently picked these 3.42 gears up in an open Yukon box.
http://www.ebay.com/itm/381660752167

They are said to be new unused. I was just curious what the extra hole in the pinion was. Maybe to balance it? See attached

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06-16-2016, 10:44 AM

big gear head

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Re: Hole drilled in pinion

May be an indexing hole for the machining process.

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06-17-2016, 11:05 AM

midias

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Join Date: Oct 2004

Location: Henrietta NY

Posts: 4,377

Likes: 47

Received 193 Likes on 151 Posts

Car: 1984 Trans Am L69

Engine: Sniper EFI Powered 355

Transmission: WC T5 w/ Steel Support Plate

Axle/Gears: 3.42 10 Bolt Posi

Re: Hole drilled in pinion

Quote:

Originally Posted by big gear head

May be an indexing hole for the machining process.

You are correct I asked yukon and that is what they told me.

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