Bwitched, just a couple more questions--is the crush sleeve a standard item like from a bearing house? And the torque is 18 to 20 inch lbs on the crush you used on the Quaife? Please pardon my mechanical void, I'm not a complete idiot--only half
For anyone that might be confused on the very low torque settings I threw out, an explanation.
The 18 to 20 in/lb on the Ford pinion is NOT the torque required to tighten the nut, but the force required to spin the pinion shaft after the crush sleeve has been torqued down to set the preload on the pinion bearings.
I'm not sure on the smaller Quaife, but I would guess it will be a bit less than the 18 to 20 on an automotive pinion shaft. It's also hard to find a torque wrench capable of reading that low. Some of the old lever torque wrenches with the scale and the pointer will read that low, but they are a bit temperamental sometimes.
Pictures of 2 modifications I made. First I opened up the oil feed hole for the forward pinion bearing, there was A LOT of casting flash in the inside of the hole. Second, I drilled and tapped the upper boss in the case for a fill port, I have seen some boxes with the vent in that location already and it makes it much easier to fill the box from the top to make sure there is enough fluid in it. I use Lucas Oil Stabilizer in the gear box, it is the best for dealing with high pressure and temperature conditions.
"Know the black and white before you walk in the gray"
Pictures of the pinion gear with shim that goes behind the bearing and sets the depth of the gear. Also a picture of the wrench I made to hold the assemble while setting bearing preload,
"Know the black and white before you walk in the gray"
UPDATE. With 800 miles on the box rebuild it is still running quite and running a consistent 145 to 160 degree box temperature. This is running 100% Lucas Oil Stabilizer in the box as a lubricant. I plan on pulling the box back out at 2000 miles to check the difference in initial preload and what it is at after run in.
"Know the black and white before you walk in the gray"
UPDATE. With 800 miles on the box rebuild it is still running quite and running a consistent 145 to 160 degree box temperature. This is running 100% Lucas Oil Stabilizer in the box as a lubricant. I plan on pulling the box back out at 2000 miles to check the difference in initial preload and what it is at after run in.
Impressive stuff!! Well done - and be sure to keep us posted.
For the last few weeks I have been running a cheap thermocouple attached to the outside of the bbox , and it shows a variety of temps depending on the load. Light running , around 60C , flat out racing around 90C. This is running Redline Shockproof oil. Sorry about quoting temp in C , my head doesnt do F.
