boilermaster
Well-known member
I am running a 71 FB with C4 trans (unknown ) and 9'' rear diff (no tag) 51'' driveshaft and with the car sitting I only have about 1'' of travel left till the trans yoke hits the tailshaft of the transmission.
the rear diff appears to have a long yoke that could be causing my concern.
It measures 4-3/8'' from front to rear of seal guard, would this be considered the long flange ?
Can this flange be replaced with shorter one with an unknown diff ?
What I know about the rear diff. so far.
9'' (cannot put socket on 2 lowest nuts) , standard case (only 1 vertical rib , pinion support (C5AW-4688-A ) securing bolt flanges all machined flat and bolt on snubber.
axle ratio believed to be 3.91 (aligned paint stripe thru fill hole and 1 rotation= almost 4 revolutions of the pinion flange.
the markings I found on the carrier 9D17, DIF 61 the circular stamping =13616
I do not intend to keep the 3.91 gearset, but this is supposed to be a locking differential, and I would like to rebuild it with perhaps 3.55 gears.
any information on what I have would be greatly appreciated.
Boilermaster
the rear diff appears to have a long yoke that could be causing my concern.
It measures 4-3/8'' from front to rear of seal guard, would this be considered the long flange ?
Can this flange be replaced with shorter one with an unknown diff ?
What I know about the rear diff. so far.
9'' (cannot put socket on 2 lowest nuts) , standard case (only 1 vertical rib , pinion support (C5AW-4688-A ) securing bolt flanges all machined flat and bolt on snubber.
axle ratio believed to be 3.91 (aligned paint stripe thru fill hole and 1 rotation= almost 4 revolutions of the pinion flange.
the markings I found on the carrier 9D17, DIF 61 the circular stamping =13616
I do not intend to keep the 3.91 gearset, but this is supposed to be a locking differential, and I would like to rebuild it with perhaps 3.55 gears.
any information on what I have would be greatly appreciated.
Boilermaster