The Stovebolt Site Forums The Shop Area The HiPo Shop Will my 3/4 Ton rear hold up with a big block?

Will my factory 4.57 rear hold up with a 454? I would like to keep the rear if possible. If it hooks will I break it?

Thanks for you time

It all depends on the build, transmission, tires, etc,

I believe the banjo is good for about 350 HP and 350 lbs of torque. I ripped the banjo apart in my 59 gmc 1/2 ton with a mildly built Pontiac 389. My 389 was built for about 345 HP and 450 lbs of torque.

Put it together and see if it will live.

57DanR,thought I would let you know,if your rearend don't hold up,God Forbid. I have a fresh rearend,all new components,drums and all,with 8lug axles.If you need a backup,I have one. It has 456gears,it came out of a 51 Chevy 3/4ton pickup. In real good condition,I swapped to an S10 posi-trac 373 gears. I have a overdrive tranny,with 350 small block. I am located about 30 miles north of Dayton,Ohio. Good Luck,and Best regards.

Thanks for the responses! I plan on putting a 400 auto or 700r4
with street tires on my 17" 8 lug rims.

We used dozens of them in dirt trackers with high-HP small blocks and a few big blocks all over central California. It was not uncommon to see massive wheelspin, washboard turns, and repeated full throttle/coast cycles with no damage whatsoever, and all of this with the spider gears welded together so both wheels would hook up equally. Those old 3/4 tons are about as bulletproof as they come, just extremely heavy. We used Muncie 4-speed car transmissions in 2nd. gear against the 4.56 gearset for short tracks that measured 1/4 mile around the outside fence, and 4.10's on "long" 1/4 mile tracks that were measured around the infield perimeter. With a 1.88:1 2nd. gear against a 4.56 rear end, the overall ratio was 8.57:1. The car would come off the turn at about 3,000 RPM, and wind up to 6,500 or 7,000 by the end of the straightaway. On a 25-lap main event, the rear end got at least 50 of those RPM cycles. Counting practice, qualifying, heat races,and the main event, figure on at least 200 full-throttle accelerations and chopped-throttle turns every weekend, all summer! Yep, I think yours will hold up just fine!
Jerry