pinion angle (1 Viewer)

[CheyenneTrucker]

I have a 1969 FJ40 with Diamond axels and a SOA setup the rear pinion angle is facing slightly upwards when sitting on the ground, at full droop it is lines up with the driveshaft , it does have a Double cardon setup on the transfer case side . My question is having the pinion angle facing slightly up when sitting on the ground going to cause premature wear on the u-joint?
Any info would be appreciated. Cheers Dennis

 

[Mike Shull]

I doubt that your ujoint will be affected much if you don’t have any vibration, but I would be concerned about whether you have enough oil getting to your pinion bearing. What degree is your pinion?

 

[CheyenneTrucker]

Well I cut the spring perches off last night . I plan on remounting them today. I see what you are saying about the getting oil to the pinion bearings. I haven't had any vibration problem in the past.

 

[Mike Shull]

If it helps, I am running my C 14 rear pinion angle at 15-16° and I ran my factory FJ 40 axle somewhere around 10-12° for about 60,000 miles with no issues.

 

[Mike Shull]

I don’t know anything about Diamond axles. Perhaps @Firemedic831 might have a better idea?

 

[Firemedic831]

I don’t know anything about Diamond axles. Perhaps @Firemedic831 might have a better idea?

I do know a little about the Diamonds . But a Diamond housing will have zero effect on what pinion angle you are running .

 

[CheyenneTrucker]

that is true , the differential housing can carry quit a bit oil Due to the internal seals. well i got it all back together looks better then it did

 

[Mike Shull]

Let’s see it.

 

[peesalot]

Put it at 9 or 10 * with perches at 0*, oiling will be fine.

 

[hoser]

My question is having the pinion angle facing slightly up when sitting on the ground going to cause premature wear on the u-joint?

The pinion is supposed to point towards the transfer case when using a double cardan joint.