700r4 speedo gear help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

10-02-2012, 04:31 PM

legendman

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Join Date: Nov 2011

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700r4 speedo gear help

Hi all, I replaced a th350c with a 700r4 in my 84 C10 and the 700r4 I put in is out of a 89 C1500 with a electric speedo. I got the reluctor off the output shaft. I know to find a older 700r4 with a cable driven speedo setup.
But I have no idea what number teeth drive and driven gear I need.
Plus I don't know the rear end ratio and I think I am going to need this info figure it out. Anybody out there know what they have for the speedo gears?

Also I wonder if the gears off the old th350 will work?

Thanks

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

Quote:

Originally Posted by smackzed

I put a chevrolet tailgate on my last truck and it started acting like a girl...love me, need me, want me pay attention to me. Took it off and put the GMC back on (fixed the latch) and it went back to being the same old dirty bastard it used to be

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