Rear gear ratio - The 1947 - Present Chevrolet & GMC Truck Message Board Network

11-22-2012, 04:37 PM

legendman

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Join Date: Nov 2011

Location: 19

Posts: 607

Rear gear ratio

Pulled my rear cover off and counted the teeth on ring and pinion
16 on the pinion and 41 on the ring gear, which means its got 2:56 gear ratio.

Originally it had a 305 with a th350 trans.
And I swapped in a 700r4 but I need to figure out which speedo gears to get.

Seems odd that it would have a 2:56 ratio.

Anybody else have a th350 and know what their rear gear ration is?

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1999 Chevy K2500 RCLB 350 4L80e
2004 Chevy 3500 C&C Dmax Allison

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