I need help determining the iden***y of what appears to be a GM 10 bolt, it is mounted in a 1951 Chevrolet pickup. Someone machined a 5 lug to 6 lug adapter, so the 6 hole wheels could be mounted. The axle code is 6 FC 0265 , not a code I can find on any site. Backing plate to backing plate is approximately 53 inches. I am have run out of places to look so I turn to you for help. Thanks Mike
Looks like an 8.5 GM ten bolt from here. How many splines are the axles? Whoever mounted the adapter also redrilled the axles to the adapter's 5 bolt pattern. Good luck with the project
In the top center pic, look at the bottom side of the center. Looks like two "fangs" pointing down. My guess is this is a gm camaro or firebird 7.5 inch rear. Probably ratios in the high 2's or maybe a 3:08.
I'm gonna revise my guess. Looks more like a 7.5 and I think that might even be the remnant of a camaro torque arm mount on top. Maybe. 8.5s are rounder, 7.5s are more like a rectangle with the corners softened (like this one). Since it doesn't have 4 link ears on the housing you can rule out fullsize and midsize apps. S-10 and astro and F body are the sources of 7.5 rears without the 4 link ears cast on top. 8.2 ten bolts, like a first gen camaro would have usually (always?) have a ridge in the cover to direct oil. You'll still need to know how many splines to do anything with it. Hopefully it's 28. Good luck.
Ok, thanks for the info to date. We pulled the axle shaft, it is a 26 spline. The axle have 819 and KK in the forge. Here are some more pictures
look at the ring gear, are there any numbers stamped on it? usually they have the month/year which will help you figure out how old it is. also measure the ring gear diameter, if it's about 7.5" then it's a 7.5, most likely...especially with those little axles...
I had a 7.5" (82-89 f body)apart last night and the main caps were different than you have, so I would guess 8.5"
That's a standard 26 spline 7.5, the higher performance and later model versions were called 7 5/8 and had 28 spline. Somewhere on that ring gear you'll seen numbers **:**, that's the teeth on each gear. Divide it out, there's your ratio. It may even be stamped right there too. good luck
Why would you guess it's a 9 inch? Because that's what people put in hot rods? That doesn't look anything remotely like a 9 inch. Stop spreading misinformation newb. BTW, nice touch referring him to a Chevy site to look for his Ford axle.
26 spline axles confirm to me that it's a 7.5" GM rear. Is there any sign of axle seats being removed from under the housing? If so, S-10. I sell diff parts.
I have reasearch some of the parts used on an S-10 rearend , they use 3/4 bore wheel cylinders. Mine has 15/16 bore wheel cylinders. Someone mentioned a Nova, 75-77 (maybe other years) use the same wheel cylinders as mine. Could the rearend be from a Nova or Omega from the 70's and be a 7.5?
Is it me, or does the plate that is bolted on up toward the pinion look like what is left of a pinion snubber? Early Nova (Chevy II)?
Looks like it, but I didn't see the code in the early nova book. And it has that 7.5 look to it, not the 8.2 look.
True that. I thought it might be a mid 70's Chevy Monza rear (or Cosworth Vega), with a mount for the torque arm, but the bolt pattern and bracket looks wrong. I think those were 7.5". Weird.
Gear is stamped 273:1 . S-10 looks Identical on the outside, but spe's don't match. The code that comes the closest is an Astro van. FCA vs the FC 0265? the brake wheel ylinders were 7/8 not 15/16/ I think the best bet for parts with the info I have gained from all of you would be an Nova or Omega 77-79. Again code doesn't lthough.
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