driveshaft and pinion angles

[Hottrucks]

so you are saying that ther could be up to 2* diff from the trans to the axle...so I could split up the bad angle that would result from the trans not going up high enough ( I'm conserned about carb angle by liftting the tailshaft to much)

it would kinda make the drive shaft look like it was flat on the floor and you lifted one end it would bend in the middle until you where at 2* then you could have 2* more on the trans and 2 in the oposite direction on the axle?? or would the axle have to be at 4*

I think I have a brain cramp??

[fixit-p]

It really depends on what your angles are. In the diagram below lets assume that the transmission is sitting down 4* and we want a 1- 1.5* operating angle on u-joint #1 we can set drive-line #1 down either 3-3.5* or 5-5.5* that gives you some flexibility. Lets say we go with 3* down, now in relation to the transmission drive-line #1 is going uphill but thats OK because u-joint #1 now has a 1* operating angle (4*-3*=1*). The rear ends pinion angle needs to be set at 3* up so that its centerline is parallel with drive-line #1's centerline this makes the operating angles of u-joints #2 and 3 equal, this is what will cancel out vibration. To calculate the operating angles of u-joints 2 and 3 subtract the angle from drive-line #1 from the angle of drive-line #2. I hope that makes sense.

[Hottrucks]

I think I got it...

trany output is @ o* so my drive shaft will be at 1 1/2* (up) and driveshaft 2 will be @ 3* up (compared to the output shaft or 1 1/2* from the other shaft) my axle needs to be at 1 1/2*

I'm going to gather up an angle guage tomorrow cut out my carrier and see what I can make it look like it maybe a combo of trany wedge relocateing the carrier and some sort of axle wedge...

[fixit-p]

Okay yes if your tranny is at 0* you can set drive-line #1 @ 1 1/2* up, but the angle of drive-line # 2 will be determined by its length and rise or fall after you have set the rear end to 1 1/2* down (parallel with drive-line #1. Once you have your angle gauge post up some real numbers.

[Hottrucks]

ok borrowing a gauge but can't get it till monday so here we are...

on a side note I was doing some measureing and noticed that we forgot 1 small detail...the pinion isn't in the middle??? its offset about 1 1/2" to the pass side which means that we are dealiing with a compound angle..(up and right)...

I'm pretty close to flipping the carrier cheating it to one side eye ball straight and calling it good but I want to follow though so maybe someone else can learn from it.....but it is confusing the hell out of me

Jeff

[fixit-p]

Dont worry about it being a compound angle virtually all rear axles are offset to some degree.

[Chevydude56]

I don't know if this will be any help. I have used this before to set up drive lines in heavy duty trucks

http://training.meritorhvs.com/DriveLineAngle.html

[70's luvr]

I just did an axle flip and ended up with this:

Trans -1
1st driveshaft +2
2nd shaft -3
Rear end -1

Using this calc I get these numbers.
http://spicerparts.com/calculators/d...gle-calculator

Operating Angle 1
3
Operating Angle 3
5
Operating Angle 2
2

I'm thinking angle 3 (5) is too much?