brushwolf
Well Known Member
Old article and it is a 58 shaft which I understand to be a little shorter, but the mechanics and theories should be the same..
http://www.superchevy.com/how-to/engines-drivetrain/sucp-0209-1958-chevy-driveshaft/
In this article they talk about front yolk angle being ideally 90 degrees to the front U joint, but the front U joint is on the front yolk, so how could it not be 90 degrees?
And in threads on driveshaft discussions they speak about "out of phase" being correct, contrary to most driveshafts having to be "in phase". I assume they might be talking about the same thing, but maybe not.
It sounds to me from the article like they are saying that ideally the front section of the driveshaft would extend straight back from the tail shaft, with no down or up angle in front part of driveshaft relative to crankshaft and tail shaft angle at all (essentially a straight line..) - until you get past the hanger bearing. Am I interpreting that correctly, or not?
And if one were to assume the angle of the engine, transmission and front portion of driveshaft were in a straight line and at 3 degrees from horizontal (down), then wouldn't the yoke on the rear axle need to be positioned 3 degrees up (or a little less allowing for torque movement of axle)? Not clear to me...
From the article:
"In some of these stock-configuration '58-64 big cars the yoke (... Do they actually mean the hanger bearing here..?) holding the front portion of the two-piece driveshaft was intended to be at 90 degrees to the front U-joint (at the transmission end). This controlled secondary couple loads. The rear half of the driveshaft then went on the required angle to properly connect with the differential"...
Looking at the pic (Inland, I believe..), where is this "out of phase" referred to in some of the driveshaft commentary seen? Looks to me like the yolks are in phase, rather than out of phase on the front shaft... Or my understanding of that is backwards..
Or, does that "out of phase" commentary mean the yoke on the rear driveshaft needs to be installed on the splines so that the rearmost yoke provision for the rearmost U joint is 90 degrees off from the yolk provisions for U joints on the rear of the front driveshaft?
And how do they get that hanger bearing on the shaft, install it before one of the yolks is welded to the front shaft? Or does the hanger bearing come apart somehow, so if the bearing goes out it isn't near impossible to replace without a new front shaft too?
Thanks, Mike
http://www.superchevy.com/how-to/engines-drivetrain/sucp-0209-1958-chevy-driveshaft/
In this article they talk about front yolk angle being ideally 90 degrees to the front U joint, but the front U joint is on the front yolk, so how could it not be 90 degrees?
And in threads on driveshaft discussions they speak about "out of phase" being correct, contrary to most driveshafts having to be "in phase". I assume they might be talking about the same thing, but maybe not.
It sounds to me from the article like they are saying that ideally the front section of the driveshaft would extend straight back from the tail shaft, with no down or up angle in front part of driveshaft relative to crankshaft and tail shaft angle at all (essentially a straight line..) - until you get past the hanger bearing. Am I interpreting that correctly, or not?
And if one were to assume the angle of the engine, transmission and front portion of driveshaft were in a straight line and at 3 degrees from horizontal (down), then wouldn't the yoke on the rear axle need to be positioned 3 degrees up (or a little less allowing for torque movement of axle)? Not clear to me...
From the article:
"In some of these stock-configuration '58-64 big cars the yoke (... Do they actually mean the hanger bearing here..?) holding the front portion of the two-piece driveshaft was intended to be at 90 degrees to the front U-joint (at the transmission end). This controlled secondary couple loads. The rear half of the driveshaft then went on the required angle to properly connect with the differential"...
Looking at the pic (Inland, I believe..), where is this "out of phase" referred to in some of the driveshaft commentary seen? Looks to me like the yolks are in phase, rather than out of phase on the front shaft... Or my understanding of that is backwards..
Or, does that "out of phase" commentary mean the yoke on the rear driveshaft needs to be installed on the splines so that the rearmost yoke provision for the rearmost U joint is 90 degrees off from the yolk provisions for U joints on the rear of the front driveshaft?
And how do they get that hanger bearing on the shaft, install it before one of the yolks is welded to the front shaft? Or does the hanger bearing come apart somehow, so if the bearing goes out it isn't near impossible to replace without a new front shaft too?
Thanks, Mike
Last edited: