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differential yoke size?

2K views 8 replies 4 participants last post by  Jim Mac 
#1 ·
why did chevy install different size yokes on the differentials? the first 2.73 12 bolt had the regular 1310 u joint, swapped it to a factory 3.31 12 bolt open and it has the larger joi t so I needed the conversion u joint. Going to swap it out soon for a rebuilt 3.31 posi which was originally a 2.56 open and it's got the 1310 u joint again. jim
 
#3 ·
no idea, found it at a yard sale, stored under a boat.jim
 
#5 ·
my 69 KK rear had that yoke. at least I'm pretty sure it did.
I'll have the rear out in a month or two, I'll check it then. jim
 
#8 ·
well folks, pulled the diff this afternoon, the code is RU. according to the chevelle stuff, its possible it's a 454 rearend. unless that info has errors. jim
 
#9 ·
diff is dated C 17 1. I think it was 17 in the middle. jim
 
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