HELP! Countdown hold on engine drop

[viejopatron]

Drop is coming smoothly except the CV joints won't break their lovelock with the half-shafts. They're the old 4-bolt type. I thought the drop movements would cause them to release.

What am I doing wrong?

[Jim Sims]

The four-bolt type also contain two "Spirol" type roll pins. Typically one needs to separate the flanges by driving something into the seam (where the gasket is); I use either a trimmed down, high impact, plastic tent peg or a hardwood wedge to avoid marring the flanges. If the engine/transmission is now down and resting on the jack you may want to consider raising it back up and resecuring the mounts before you start driving the CV joint flanges apart. I separate the 4-bolt CV joint flanges before lowering the engine.

[viejopatron]

Thanks Jim

[Jim Sims]

Axle shaft removal.....

[viejopatron]

I'm trying to separate item 14/1 from the trans axle flange. See attached photo and figure.





Considering donut murder. Someone please talk me out of it.

[Jim Sims]

14/1 is a CV joint element in the exploded sub-diagram; it is not the output flange shown in the your posted image. Why are you removing the output flange? To replace the shaft seal? It is not necessary to remove this output flange to drop the engine/transmission. To remove the output flange put a couple of inexpensive 8.8 strength class M10 screws in two of the tapped holes in the perimeter and place a bar through them. Use this set up to react the torque required to loosen the center bolt These center bolts have standard right hand threads; they loosen in the usual counterclockwise direction when looking straight at them. Once the screw is removed. The output flange then pulls out, followed by some transmission gear oil if you haven't drained it. When reinstalling the screw (yes it can be reused) tighten to 20 ft-lbs if it came with a washer under it - a 1973 915 should have this washer. Use the two M10 screws in the flange to react this re-tightening torque.

[Jim Sims]

By the way, the output flange/transmission shown in the image is not a 1973 915. The center bolt of the tranmission shown in the image will likely not have a washer under it and in that case will require 31 ft-lbs of torque to retighten.