littlekings

I wanted opinions on the 10 vs 12 bolt GM rear ends. It is for dirt circle track, I've seen the c clips bust on the 10 bolts and I can't get anthing close to a .600 ring and pinion in the 10 bolt.
Is the 12 bolt much of an improvement or is the 9 inch ford the way to go? I know ford is a dirty word but FMC has to have done something right over the years.

AlkyIROC

Nothing wrong with using a 9" if you're allowed to. Some classes won't let you swap parts from different brands.

The strength of a 9" and 12 bolt is close enough to same they're the same. They both have advantages and disadvantages from each other. It just depends what you need or want.

GM produced 3 different 10 bolts. The 8.5" is the most popular being almost as strong as a 12 bolt. The 8.2" was a short lived version. The current and weakest is the 7.5/7.625" found in third and fourth gens, S10's, Astro vans etc. It's not a performance diff and there is very little performance parts available. No matter how much you try to beef it up, it still has the tiny ring and pinion. I've run a beefed up 10 bolt into the low 11's on the 1/4 mile.

A complete direct bolt in 12 bolt or 9" is around $2500 for a third gen.

ede

asking once and in the correct forum is the best way to go. it'll save someone the trouble of moving your post around to where they should be.

littlekings

I noticed I posted on the wrong page and put it on the correct one. Am I being chastised? I didn't mean to inconvience you by asking a question on the wrong board.