8 3/4 DIFFERENTIAL QUESTIONS

[HemiOrange70]

Being new to the Mopar arena........suregrip is posi?      the number on the case is the pinion gear ratio(741 etc)? what ones came in ebodies? The 7 1/4 diff doesn't have the center removable??

[OUTLAW]

ya sure grip is the same as limited slip (what most call posi)the case housing number is pinion stem diameter

[ShelbyDogg]

There were 3 rear ends used in e-bodies. Dana 60 (9-3/4), Banjo (8-3/4), and 7-1/4. Only the 8-3/4 had the removable center sections. Those center sections were available with 3 different cases and pinion sizes marked with numbers ending in 741( 1-1/4 pinion) the 742(1-3/4" Pinion), and the 489(1-7/8 pinon). Mopar called their posi a "sure grip"  and there were 2 different style units, one with rebuildable clutches, the other with non-rebuildable cones.
The number on the ring gear states it's gear ratio. i.e. 3:23, 3:55.

[HemiOrange70]

Thank you. The hunt is on

[360 'CUDA]

Alot of folks use the B-body rearend in the E-bodies because you can fit more tire under the car.  Which gears are you looking for?

[HemiOrange70]

3:56, 3:73....?What about the bolt pattern.

[360 'CUDA]

The wheel bolt pattern is the same on B and E bodies, 5 on 4 1/2 inches.  The only different one is the A-body 8 3/4 with a  pattern of 5 on 4 inch.

As far as a kit to bolt the B-body rear in a E-body we are talking about that on this link


http://www.cuda-challenger.com/cc/index.php?topic=23538.msg231039#msg231039

Lots of other threads about this subject in the transmission / drivetrain section

[Carlwalski]

Go to Randy's Ring & Pinion, they were a great help to me. Their diff center sections are awesome, far superior to Mancini's whining piles of steel. Paid and received mine within 3 days, USA to my door in New Zealand. They have all the common gear sets for all cases. The quietest cut I have come across and we used them all.........


 

[tactransman]

After your post about Gear Venders it is good to know someone out there is doing things right.  
http://randysringandpinion.com/

[HemiOrange70]

Thanks for the info

[Chopz]

3:56, 3:73....?What about the bolt pattern.

[BIGSHCLUNK]

Randys-good place to deal with!!