CRG Discussion Forum

Camaro Research Group Discussion => Restoration => Topic started by: R68GTO on June 10, 2019, 07:09:36 PM

Title: BE COPO rear questions
Post by: R68GTO on June 10, 2019, 07:09:36 PM
Working on cleaning up my BE rear and have a couple of questions.  Is this the correct pinion yoke for a COPO application?  I've read where the joints should be held by straps/bolts instead of u-bolts like this one?  Also noticed a "58" mark above the cast date tag.  Anyone know what that is for?  And, finally, Noticed a "D" stamped below and left of the BE stamp.....any idea what that is for?
Title: Re: BE COPO rear questions
Post by: william on June 10, 2019, 07:39:15 PM
Not the correct yoke for any '69 12 bolt. Should have the larger strap/cap screw yoke. That's why '69 drive shafts are slightly shorter.
Title: Re: BE COPO rear questions
Post by: R68GTO on June 11, 2019, 04:40:21 AM
Thanks William.  What part number should I be looking for?
Title: Re: BE COPO rear questions
Post by: william on June 11, 2019, 09:00:59 AM
The original part number was 3954393. I'm sure it was a vendor sourced part, maybe from Dana. Likely still available from drivetrain suppliers.
Title: Re: BE COPO rear questions
Post by: WorkinProgress on June 21, 2019, 05:26:20 PM
Part number 3954393 is the original part number. On February of 1972 it was superseded to 3996118. That part went discontinued on November, 2004.

                                       - Warren
Title: Re: BE COPO rear questions
Post by: z28z11 on June 22, 2019, 05:01:34 PM
Quote from: WorkinProgress on June 21, 2019, 05:26:20 PM
Part number 3954393 is the original part number. On February of 1972 it was superseded to 3996118. That part went discontinued on November, 2004.

                                       - Warren

Still around as reproductions form Yukon Gear. Used pop up on eBay (one for $50.00 on now)

https://www.ebay.com/itm/Yukon-Gear-Axle-YY-GM3996118-Pinion-Yoke/163704322782?epid=193131065&hash=item261d89bade:g:DooAAOSwfr5c5-1H

Regards,
Steve
Title: Re: BE COPO rear questions
Post by: R68GTO on June 23, 2019, 05:26:36 AM
Thanks everyone for your help both online and offline!  The appearance of the Yukon gear replacement is very different especially in the "inside area where the u-joint sits.  I found a good used original.....one less part on my list to get!