identify c3 differential

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Mar 23, 2015 | 09:41 PM

gator79

Thread Starter

Safety Car

Joined: May 2005

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From: Jennings LA

identify c3 differential

I discovered my 64 has a C3 diff in it, the rear u joint for the pinion is 3.5 inches and the C2's are 3.25 inches. realized this chasing a vibration with a new drive shaft. By spinning the drive shaft and counting tire rotation it is somewhere around 3.30 to 3.50

Mar 23, 2015 | 10:48 PM

Tom73

Race Director

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From: NM

Is there a question in there somewhere?

Mar 23, 2015 | 11:16 PM

Iceaxe

Safety Car

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From: Draper Utah

Spin the wheel 10 revolutions and count the drive shaft revolutions than divide by 10 if you really want to know what gears you have in the rear end.

Mar 23, 2015 | 11:23 PM

doorgunner

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From: New Or-leens Loo-z-anna

Quote:

Originally Posted by Tom73

Is there a question in there somewhere?

I'll ask a question for the O.P.: Will a C3 Pinion Flange fit on a C2 differential (If it will fit, he still may have a C2 differential)

Last edited by doorgunner; Mar 23, 2015 at 11:27 PM.

Mar 24, 2015 | 06:58 AM

bashcraft

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Joined: Jan 2006

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From: Butler Pa

Quote:

Originally Posted by gator79

I discovered my 64 has a C3 diff in it,

My '69 has a C2 diff in it. The u-joints were the same.

Mar 24, 2015 | 07:39 AM

gator79

Thread Starter

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From: Jennings LA

Quote:

Originally Posted by doorgunner

I'll ask a question for the O.P.: Will a C3 Pinion Flange fit on a C2 differential (If it will fit, he still may have a C2 differential)

on my 64 the front bolts that mount the differential support should be threaded into the housing with the back bolt going thru the differential with a nut securing it as per the AIM. Mine has 2 thru bolts like my 71 has and my car was originally a power glide car that should have a 3.08 ratio, so I know it is not correct for my 64. Just trying to determine the year of the differential I have, not a big deal I bought a conversion u joint and all works fine. You never know what has been done to these cars over the last 50 years. With the Ls1/T56, Steeroids, disc brake and vintage air conversion the next owner should be totally confused

. I am keeping a list of parts and putting it in the glove box