OK As with most builds you end up rotating the rear diff to correct the driveline angle within reason. Even with the latest high angle short CV set-up the rear needs to be rotated.
My question is how far can I rotate it before I start starving the pinion bearings? The cover that I am using has a higher than stock filler location for added fluid to help with this, but there must be an upper limit.
SPEED COSTS MONEY: HOW FAST DO YOU WANT TO GO?
I'd try to stretch the wheelbase with some XJ rear springs. That should give you about 3".
I just fill it way full on mine, but it's offroad only.
Yes Mine will be 90% off road only also but some trips might require some pavement riding. I have seen a lot trucks with the rotated pinion but it just seems like the pinion bearings will starve for oil. Are you near Roush Creek?
SPEED COSTS MONEY: HOW FAST DO YOU WANT TO GO?
I was there this weekend (RC).Originally Posted by JERSEYJOE
The life of my Jeep...er...pile.....
Garage...trailer...trails...trailer...garage....to rn apart...trailer....
put heavier oil in it or get some climbing gear oil It's extra sticky and will climb to the bearings letting you rotate it a few more degrees. I like 85-140
Thanks Iron man. I have seen that stuff in the parts store.
Dan I might run into you there when I get the beast finished. The club I belong to goes there every Sunday
SPEED COSTS MONEY: HOW FAST DO YOU WANT TO GO?
What club?
The BEST gear oil out there is Mopar's 75W-140 syn. Great stuff. It's pricey, and I change mine too often to spend that coin.
The Dana 44 rear in my CJ has the pinion turned up about 16 degrees. I have a custom cover with the fill plug moved up, but I just run 80W90 gear oil. No problems with lube to the front pinion bearing. The ring gear acts as a slinger to get lube to the bearing. I've even done a 850 mile road trip with it. You do need to watch the outer axle seals if you fill the diff deeper than the axle tubes.
Bob
tufcj
1969 AMX
1967 Rambler Rogue
If you need a tool and don't buy it...
you'll eventually pay for it...
and not have it.
Henry Ford
The North Jersey Jeep Club
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WOW!! 16 Degrees sounds like a lot. I have not welded my perches yet as I am waiting to install the T case and measure for the rear shaft which is going to be SHORT. Then I can load the chassis to it's final ride height and set the pinion angle. With the FF axles I guess you can fill the case high and the outer bearings would get an extra dose of lube. Not sure if the hub side seal was designed to hold back hot 80W. Someone mentioned adding a small amount of ATF to the lube to prevent foaming on overly filled cases. (?????)
SPEED COSTS MONEY: HOW FAST DO YOU WANT TO GO?
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