Editing Talk:Rearend identification

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== Chevy Biscayne "P" case posi carrier ==

Sir,
I have a Chevy "P" case carrier I want to install 4:56 gears in...Next to the "P" on the case are the following numbers:

E284  GM

3789812

on the other side of the carrier is a tag that I believe has the following:

BX0519

I was told I need a "4" series "P" case carrier for these gears...how can I tell if this is a 4 series case?

Sincerely Jerry Wink
:Jerry, the Crankshaft Coalition Wiki is a database, not an active forum. So to ask questions, or for ''specific'' information not contained herein, please visit the [http://www.hotrodders.com/forum/ Hotrodders forum]. There, you can post questions to the very knowledgeable membership, or search the extensive archives.

:That said, I believe the code "BX" indicates a 3.08:1 ratio differential/ring gear and pinion was originally installed. What you need is a differential that's a 4-series, or you'll need to use a spacer made so the 4-series gears will work w/a 3-series differential. But the cast iron part the diff bolts into will work w/either the 3- or 4-series diff.

:Be sure to double check this info- it's been a long time since I was inside a '64 Chevy rear end!--[[User:Cobalt327|Cobalt327]] 13:01, 30 August 2016 (MDT)