Threaded Mode | Linear Mode

Mrkentee · 08-06-2021, **(Subject: Drive shaft alignment )**

I put a string from the transmission yoke to the rear differential input yoke. It shows the carrier bearing is a little bit to one side. I would think it should line up with the other two. I would have to drill the bracket to accomplish that. Is that necessary or is this somewhat normal? I don’t necessarily feel any vibration to speak of, but it could probably be better.
Thanks

Rawze · 08-06-2021, **(Subject: Drive shaft alignment )**

looks close enough not to worry about if ya ask me.

hookliftpete · 08-06-2021, **(Subject: Drive shaft alignment )**

My carrier bearing is slightly out of square too, no issues since i replaced it to years ago, u joints all look good etc.

Chamberpains · 08-06-2021, **(Subject: Drive shaft alignment )**

You can loosen the mount bolts the cross member and see if it'll slide the way you want to. There may be just enough slop in them. Also the holes on the mount at the carrier bearing are usually slotted for adjustment.

Mrkentee · 08-08-2021, **(Subject: Drive shaft alignment )**

(08-06-2021 )Chamberpains Wrote: You can loosen the mount bolts the cross member and see if it'll slide the way you want to. There may be just enough slop in them. Also the holes on the mount at the carrier bearing are usually slotted for adjustment.

It slides fore and aft, but not sideways. Or, at least, just a little bit. Not much.

snailexpress · 08-08-2021, **(Subject: Drive shaft alignment )**

You can twist carrier bearing left or right to cancel angles.

stevegrutz · 08-08-2021, **(Subject: Drive shaft alignment )**

U joints need to have a operating angle to them. If u joints operate at a zero angle the needle bearings wont move around and u joints will wear out prematurely.

Rawze · 08-08-2021, **(Subject: Drive shaft alignment )**

(08-08-2021 )stevegrutz Wrote: U joints need to have a operating angle to them. If u joints operate at a zero angle the needle bearings wont move around and u joints will wear out prematurely.

here is one reference...

Quote:U-Joint Angles - U-joints need a slight angle for proper lubrication. Without the correct angles, the needle bearings in the u-joint caps do not rotate. Those needle bearings need to rotate in order for the u-joint to operate reliably and smoothly. These u-joint angles should always be at least 1-degree to avoid wearing out the yoke bearings ...

ref: https://www.therangerstation.com/tech_li...gles.shtml

and there is another reference in the "Drive-line Install Manuals" from Eaton-Dana. It basically states that ...

Quote: When installing a midship-mounted PTO, auxiliary transmission, or midship-mounted pump into the main driveline of a vehicle,install it at the same angle as the transmission. Keep the offset to a minimum to reduce universal joint operating angles.

Note: Do not make the universal joint operating angle less than 1/2 degree.
...
If the device ends up being installed in direct line with the transmission, with little or no universal joint operating angle on thejoints, raise or lower it so there is enough offset to create the required 1 to 1-1/2 degree universal joint operating angle on eachend of the driveshaft
...

ref: https://www.waterousco.com/media/wysiwyg...1-DSSP.pdf

===============

maybe this adds to the conversation.

Mrkentee · 08-15-2021, **(Subject: Drive shaft alignment )**

(08-08-2021 )Rawze Wrote:
(08-08-2021 )stevegrutz Wrote: U joints need to have a operating angle to them. If u joints operate at a zero angle the needle bearings wont move around and u joints will wear out prematurely.

here is one reference...
Quote:U-Joint Angles - U-joints need a slight angle for proper lubrication. Without the correct angles, the needle bearings in the u-joint caps do not rotate. Those needle bearings need to rotate in order for the u-joint to operate reliably and smoothly. These u-joint angles should always be at least 1-degree to avoid wearing out the yoke bearings ...
ref: https://www.therangerstation.com/tech_li...gles.shtml

and there is another reference in the "Drive-line Install Manuals" from Eaton-Dana. It basically states that ...

Quote: When installing a midship-mounted PTO, auxiliary transmission, or midship-mounted pump into the main driveline of a vehicle,install it at the same angle as the transmission. Keep the offset to a minimum to reduce universal joint operating angles.

Note: Do not make the universal joint operating angle less than 1/2 degree.
...
If the device ends up being installed in direct line with the transmission, with little or no universal joint operating angle on thejoints, raise or lower it so there is enough offset to create the required 1 to 1-1/2 degree universal joint operating angle on eachend of the driveshaft
...
ref: https://www.waterousco.com/media/wysiwyg...1-DSSP.pdf

===============

maybe this adds to the conversation.

The carrier is straight out from the transmission, mounted to the frame cross member. The joint goes down from there to the front diff. So it has an angle. The only thing I was concerned about was that the whole thing was a little out of line. Probably not enough to worry about.