Transfer Case Rear Output Yoke Angle

[Rubigeaux]

Tried searching, no luck. Maybe I'm using wrong terminology.

Installing a new long arm suspension with Motobilt's weldin belly pan. I'm looking for OE specs or best practice for transfer case output relative to ground or frame. I'm not running the OE mount and no longer able to take OE measurements since new parts are tac'd in the perfect spots. I'm installing a universale transmission mount.

2005 Unlimited (LJ)
6 speed manual (NSG370)
OE transfer case (NP231)
No body lift
Newish OE rubber motor mounts

Rear Axle
Dynatrac 60 high pinion angle pointing at TC yoke is about 7.5* up. (Likely to change after a good mock up and number crunch on suspension cycling, feedback on this is welcome too )

What should be the tranfer case output yoke anlge relative to the ground?

Please point me in the right direction.

 

[Weasellee]

I believe, as long as you are using CV driveshaft that angle is not critical. Rear pinion set to proper angle and proper length driveshaft and I’ve never worried about output shaft angle. But I’m not 100%

 

[NashvilleTJ]

Tried searching, no luck. Maybe I'm using wrong terminology.

Installing a new long arm suspension with Motobilt's weldin belly pan. I'm looking for OE specs or best practice for transfer case output relative to ground or frame. I'm not running the OE mount and no longer able to take OE measurements since new parts are tac'd in the perfect spots. I'm installing a universale transmission mount.

2005 Unlimited (LJ)
6 speed manual (NSG370)
OE transfer case (NP231)
No body lift
Newish OE rubber motor mounts

Rear Axle
Dynatrac 60 high pinion angle pointing at TC yoke is about 7.5* up. (Likely to change after a good mock up and number crunch on suspension cycling, feedback on this is welcome too )

What should be the tranfer case output yoke anlge relative to the ground?

Please point me in the right direction.

View attachment 549346

That angle is inconsequential. It is what it is. What type of driveshaft will you be running? Double cardan?

Setting the rear pinion angle to create the proper driveline joint angles - front and rear - is what is important to avoid vibration. But that is driven by the type of shaft you run.

 

[Rubigeaux]

That angle is inconsequential. It is what it is. What type of driveshaft will you be running? Double cardin?

Setting the rear pinion angle to create the proper driveline joint angles - front and rear - is what is important to avoid vibration. But that is driven by the type of shaft you run.

Thank for your response. It's a double cardin.

Right now I have a jack holding my transmission and transfer case.
I'm trying to find the proper angle of engine, transmission, and transfer case (if any)since I forgot to take basic measurements before removing stock belly pan...and tacking in the motobilt pan.

Guess I'm looking for guidance on installing one of these universal transmission mounts.
https://motobilt.com/products/universal-transmission-cross-member-kit

 

[NashvilleTJ]

Thank for your response. It's a double cardin.

Right now I have a jack holding my transmission and transfer case.
I'm trying to find the proper angle of engine, transmission, and transfer case (if any)since I forgot to take basic measurements before removing stock belly pan...and tacking in the motobilt pan.

Guess I'm looking for guidance on installing one of these universal transmission mounts.
https://motobilt.com/products/universal-transmission-cross-member-kit

It looks like you are giving up a lot of ground clearance with that motorbilt belly pan, and for no good apparent reason as it looks like you could tuck your t-case up above the frame rails - in which case you would be able to run a flat belly pan. Hard to tell from the pics, though.

My advice would be if possible, tuck the t-case up so that you could run a flat pan if you elected to do so later. If you can't get it that high, then mount it as high as you can. That way if you get tired of draggin' the belly and went a different route at least you won't have to redo the tranny mount. With the hi-pinion rear in the LJ you will not have any problems with driveshaft angles.

As far as the rear driveline angle goes, you may have seen this chart before, but it describes the alignment you need with the double cardan (C. V.) shaft.

 

[LONGJP2]

What should be the tranfer case output yoke angle be

Won't it be whatever the engine angle is?
So whatever angle keeps the engine mounts happy/neutral.