drive shaft

[ApopkaFL]

Does this drive shaft look good in the postion its in?

 

[ODdave]

how many degrees on it? Its not straight is it?

 

[3dAngus]

Yeah, if you're going uphill.

 

[ODdave]

I guess i should clarify....... the 2 shafts are Not straight with each other are they? (bad for the joint) judging by the pic i would raise it......

 

[ctmustang]

Do you have any bracing on the drop down frame to hold it from wanting to shift side to side. Theres alot of stress on the center bushing.

 

[ApopkaFL]

The two shafts are straight. ( I just the photo). I had the shaft like this <=====> straight with the rear drive drop to the rear axle but I did not like the angle of it. That is why its the way it is now.

 

[ODdave]

fwiw, never run a cardan joint without some angle on it. The needle brg's will not roll therefore will not transfer lubrication and suffer from impact loading.

 

[smoke]

I believe you want a min of 3 degrees working angle and no more than 7 degrees on u joints for driveshaft. there is a tool you can get for reading angles on driveshaft.Like somebody else said need angle for needle bearing to move in caps.

 

[ApopkaFL]

I believe you want a min of 3 degrees working angle and no more than 7 degrees on u joints for driveshaft. there is a tool you can get for reading angles on driveshaft.Like somebody else said need angle for needle bearing to move in caps.

fwiw, never run a cardan joint without some angle on it. The needle brg's will not roll therefore will not transfer lubrication and suffer from impact loading.

thanks guys.

 

[m16ty]

I don't know much about vehicle drivelines but I have been heavily involved in agriculture drivelines in the past.

What a lot of people don't understand is that a u-joint will have a change in velocity depending on the angle (the more the angle the more the velocity change). On ag applications you should always have u-joints in pairs running at close to the same angle. That way one will cancel out the velocity change from the other and not pass it on to the driven part. This is also why driveshafts need to be timed. CV joints can be used by themselves because they are basically two u-joints in one and cancel out the velocity change within the joint.

Also, if the angle is too great the velocity change can become too much and cause the driveshaft to vibrate wildly. People that have pulled a PTO driven piece of equipment behind a tractor and cut too sharp have experienced this.

Going by my ag experience, If you get much angle on that center joint you're going to have vibration problems. Most vehicle drivelines I've seen with carrier bearings are pretty straight from the trans to the carrier (this angle doesn't change and remains constant). From the carrier to the rearend is where the angles are and move depending on axle articulation.

 

[Awesome Possum]

Does this drive shaft look good in the postion its in?

Help me out here as I'm adding about 8-9" to the wheelbase of my bobber, but I can't figure out what your picture is of. Is this a really lengthened bob, an M36 or what? I won't need a two piece driveshaft for my lengthening, will I? Plans are to use a driveshaft loop just in case things go awry.....

 

[Awesome Possum]

Help me out here as I'm adding about 8-9" to the wheelbase of my bobber, but I can't figure out what your picture is of. Is this a really lengthened bob, an M36 or what? I won't need a two piece driveshaft for my lengthening, will I? Plans are to use a driveshaft loop just in case things go awry.....

DOH! Is this a crewcab?

 

[dave wagner]

Shouldn't the rear u joint be turned 90 degrees from the front joint?

 

[ODdave]

Shouldn't the rear u joint be turned 90 degrees from the front joint?

Oh my............no

 

[shannondeese]

On that pic the center support in many cases would want to be higher - then possibly run a c/v after that carrier - By the Way This Is Jess Shannon's friend.

 

[dave wagner]

Oh my............no

My bad, should have looked at bigger picture