Ok, so I recently (350 miles ago) did a complete teardown and rebuild of my 98 Ram's 5.9L 360. Upgraded to a slight dome racing piston, very small upgraded cam, roller rockers, monster torque convertor, kegger mod. Dyno tested it and tuned the timing and injector pulse width, modified the O2 sensor values, installed a new catalytic convertor and went with straight pipes from there. The trans is a 46RE with several mods and less that 1200 miles. I was running along at 75 mph using the cruise the other day and the rear pinion yoke failed. I have had several race cars and never has the yoke cracked. Just wondering if I overlooked this while reading here during my rebuild or if this is something new.

 

The pinion nut is known to come loose on these trucks. Its very possible that thats what happend and caused your failure.

 

Pinion nut is tight, rear diff is quiet. 1 of the 4 rises that the retainer bolts go in to actually broke off.

 

That is just bizarre. I have seen ujoints grenade, but, never the yoke itself, unless the bolts holding the ujoint worked loose, and allowed it to 'bang' on the ears....

 

Thats a possibility but every bolt that I removed during this rebuild was torqued and loctited where applicable. Now I gotta find the specs on the driveshaft to replace that also. Needless to say it smacked the ground and underbody a few times at 75 MPH in the couple of seconds it took me to get it into neutral.

 

Never heard of something like that. Im stumped as to why it would fail there. My guess woulda been on the driveshaft out of balance or something. But you would have known that well before a failure happened

 

Look in the yellow pages. You might have a drive shaft shop local.

 

Yeah zman, I do have a couple of driveline specialists here. They want an arm and a leg for a new shaft. They usually build racing shafts for all of the dirt track racers around here. They don't want to bother with me and my 4x4 ... lol. If I can get a new shaft from somewhere other than the stealership I would be willing to go that route depending on the cost. Any ideas on a recommendation for a brand of replacement pinion yoke?

 

Just recently some one on DF had to replace one. Try a search, I can't find the thread, but I know it had a link for where he got a new yoke. Also, I would try the JY for both.

 

You think the thread title was something unrelated to the topic? lol