8-3/4. small pinion vs large pinion

[Fisher]

I have a chance to buy a small pinion 8-3/4 sure grip clutch type center section. How much Hp tq will they take? this is a street car, street tires, 450 hp 480 tq big block duster. He also has some big bearing centers but not sure if he wants to part with them? Will the small pinion hold up?

 

[mcodecuda]

I have never seen a broken pinion in a 8-3/4. The only thing that I have ever seen is a broken ring gear.

 

[oldkimmer]

...........u will b fine, my old race car had 1 in it 4 over 20 years.......kim/.......

 

[SGBARRACUDA]

The 741 carrier is plenty capable to handle a lot of abuse. I've ran them for years in different set ups. If it were a 4speed car with slicks I might be looking at a 489 or 742 case.

 

[mowrycuda68]

•''741' Casting - 1 3/8" (1.375") Small Stem Pinion.
Carrier casting numbers were 1820657 (1957-1964) and 2070741 (1964-1972). This unit was usually used in low weight/medium horsepower and high weight/low horsepower applications. Although it is the weakest of the 8.75" units, it is still a stout unit, and is stronger than the Spicer-built Chrysler 8.25" rear. The 1 3/8" pinion is also larger than the pinion in the Ford 9"

DO IT!!!!

 

[Fisher]

Thanks guys i appreciate the help.

 

[fishy68]

Yep, you'll be fine. Seen numerous race cars running low 11's high 10's using them with no problems. Their a lot tougher than most people think.