COPO Eaton Posi

**big gear head** · #1 11-23-2018, 10:30 PM

This is more of a question. Is this correct or does this guy not know what he has? What is the F4J code?
https://www.ebay.ca/itm/GM-Chevy-69-...4:pf:0&vxp=mtr

**69 Post Sedan** · #2 11-24-2018, 12:40 PM

I’m not sure if it’s real.....if it was, you’d think he’d show everything disassembled, displaying all the internal parts as they are different than a standard unit.

F4J is the date code. F=June, 4=4th and J=1969.

Kurt

**big gear head** · #3 11-24-2018, 01:51 PM

Thanks. I sent him a message asking how many teeth are on the axle gears. He is supposed to be checking it. Am I correct in thinking that the COPO unit has 16 teeth on the axle gears?

**olredalert** · #4 11-24-2018, 03:25 PM

----Rosebush is a well known guy around these parts. I don't remember hearing anything negative about his operation...….Bill S

**m22mike** · #5 11-24-2018, 06:26 PM

The springs pictured I do not believe are COPO springs.
As far as the casting number, ALL 4 series standard or COPO used the same casting #.
The PN is different but not on the carrier.
The side gears for COPO are 16 teeth vs 18 on a standard 12 bolt.
It does kind of look like this unit has 16 tooth side gears, but you can not tell by that picture for sure.
And if it was a BE/KQ carrier, good luck finding the parts needed to make it complete. JMO
Mike

**big gear head** · #6 11-25-2018, 03:41 AM

He sent me a reply and said that it does have 16 tooth axle gears, so I'm guessing that it actually is a COPO unit. I think these had 800 pound springs, not the green 200 pound springs.

**69 Post Sedan** · #7 11-26-2018, 01:59 AM

I believe that it should also have the round plates, not the oval ones. Again, more pictures of it disassembled would be beneficial to the seller and the buyer.

I also agree that Rosebush is a reputable seller.

Kurt

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