68 Cutlass S TH350 questions

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Oct 18, 2013 | 12:08 PM

Xlhowie

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Joined: Aug 2013

Posts: 93

From: Riverview, FL (E of Tampa)

Speedometer gear question

Hi all. I have a TH350 with what I counted as an 18 tooth speedo drive gear. I have a GM rear end with axle code of CB 012_ B, GM53, cast # 3917123NF, CON1, Date A14 9, I am trying to figure out what speedo gear to get. From the CB code I believe it's a 3:36 ratio rear gears. Any help would be great. I'll be running 26" diameter tires when complete. Thanks a bunch, look at my project pics. Howie

Last edited by Xlhowie; Oct 23, 2013 at 03:55 PM. Reason: poorly worded title