Rear end cases?

[super-bee_ski]

I have a 70 B-body DANA all set to go but I'm happy with the original rear end in the 70 Bee (Hemi but stock) and the 741 going into the Max Wedge powered 63 Polara.

 

[70Fish]

A great thread as a friend of mine and I will be swapping out the 3:91's in my 8-3/4 sure grip unit for either a 3:23 or 3:55 set in the coming weeks. With 14" wheels, the motor is tachin' on the highway now, and with the today's price of gas, it's got to go.

 

[sublimegtx]

Shipping would be the killer....you're talking about 80 lbs on it....

The engineers figured that a tapered pinion would have less deflection and it probably does but I've shaved ring gear teeth off of just as many 89's as the others. And if you plan on racing using the 89, the crush sleeve should go into the trash. It's kinda funny that they made a tapered pinion for the 8 3/4 and the Dana 60 never got one. Ever compare A 60's pinion with the 8 3/4's? It's pretty amazing that it's smaller than the one in a 42 case....so what were the engineers really thinking? :toothy5:

You will notice a difference with the way it acts especially at slow speeds....a trans cooler might be a good idea if you do drive it slow a lot because the converter will most likely be slipping more often than before. 3.55's are more of a street performance gear ratio while a 3500 stall is more of a mild track performance unit imo.

Already have a seperate trans cooler. Thanks

 

[sublimegtx]

Already have a seperate trans cooler. Thanks

And 15" wheels.

 

[benno440]

my 68 charger had a 741 non sure grip, i just bought a new 489 case 3:55 richmond gears with detroit true trac, no clutch (helical gears) no lsd gear oil just normal gear oil for this and very strong, put new 30 spline axles in to nice and quiet and very streetable with loads of strength.

 

[Cranky]

my 68 charger had a 741 non sure grip, i just bought a new 489 case 3:55 richmond gears with detroit true trac, no clutch (helical gears) no lsd gear oil just normal gear oil for this and very strong, put new 30 spline axles in to nice and quiet and very streetable with loads of strength.

Kinda steep at 513 bucks tho....