Can a 55-56 rear end be converted to Posi?
Can a 55-56 rear end be converted to Posi?
THERE IS NO NEED TO REMOVE THE PINION GEAR to convert a 55-56 rear to posi. Also, depending on the ring gear used with a posi unit in a 55-56 case (ESPECIALLY if the ring gear is an original 55-6 ring gear), it MAY be necessary to use a ring gear spacer. The reason is because original 55-56 ring gears are thinner than 57-64 ring gears.
Is it possible to rebuild a rear differential?
If transmissions are shrouded in mystery, then the rear differential follows on its coattails. Unlike transmission building, rebuilding a rear end is basic nuts and bolts stuff, but that comes a caveat- the set up is the tricky part.
Where does the pinion gear go on a rear differential?
The differential carrier holds the ring gear and connects the pinion gear to the rear axles. This unit shown is an open-type, no posi. When things get more serious, the rebuilds get more intense.
How to convert rear end gears to Posi?
Thus, you just have to go with the BEST pattern that can be achieved. Also, with USED gears, this is the ONLY way to get an optimal pattern. Of course, this may (and probably will) require tearing down the rear 2-3-4-5 times, pressing off and on the pinion bearing to change shims until you end up with an acceptable pattern.
THERE IS NO NEED TO REMOVE THE PINION GEAR to convert a 55-56 rear to posi. Also, depending on the ring gear used with a posi unit in a 55-56 case (ESPECIALLY if the ring gear is an original 55-6 ring gear), it MAY be necessary to use a ring gear spacer. The reason is because original 55-56 ring gears are thinner than 57-64 ring gears.
If transmissions are shrouded in mystery, then the rear differential follows on its coattails. Unlike transmission building, rebuilding a rear end is basic nuts and bolts stuff, but that comes a caveat- the set up is the tricky part.
How to install a limited slip / Posi unit in a GM 10 bolt 8?
This video documents the installation of an Eaton Detroit Truetrac Limited Slip/Positraction Unit into a 1987 Chevrolet C-10 truck with a 10 bolt 8.5″ Rear-end using a used set of 3.42 gears from a 1988-98 Chevrolet truck — this truck has a 5.3L (325ci) V-8 engine and a 4l80e transmission.
The differential carrier holds the ring gear and connects the pinion gear to the rear axles. This unit shown is an open-type, no posi. When things get more serious, the rebuilds get more intense.
What’s the difference between a 55 and 64 rear end?
There were primarily 2 different rearend center cases between 55 and 64 along with multiple casting numbers, but the two primary differences were the 55-56 case and the 57-64 case.
Do you need a spacer for a 55-56 Posi case?
Also, depending on the ring gear used with a posi unit in a 55-56 case (ESPECIALLY if the ring gear is an original 55-6 ring gear), it MAY be necessary to use a ring gear spacer. The reason is because original 55-56 ring gears are thinner than 57-64 ring gears. Ring gear spacers are readily available from the aftermarket sources.
There were primarily 2 different rearend center cases between 55 and 64 along with multiple casting numbers, but the two primary differences were the 55-56 case and the 57-64 case.
Also, depending on the ring gear used with a posi unit in a 55-56 case (ESPECIALLY if the ring gear is an original 55-6 ring gear), it MAY be necessary to use a ring gear spacer. The reason is because original 55-56 ring gears are thinner than 57-64 ring gears. Ring gear spacers are readily available from the aftermarket sources.
