Front Diff Pinion Seal Leaking Again

Toph3r

New Member
Original poster
Joined
Aug 23, 2019
Messages
6
Location
Garland, TX
June 2021 – Shop A replaces the pinion seal on the front Dana 30 (4.88 gears no locker) with the one I provided them Spicer 44895. Weeks after install I have some interactions with Shop A that gave me the feeling that I need to find a new mechanic. A month later I find out my friend with an LJ had unsatisfactory work done by Shop A as well.

December 2021 – I discover the front pinion seal has a very slow leak.

July 2022 – I take the Jeep to a highly recommended place I’ll call Shop B. By this point I’ve brought 3 vehicles to Shop B and have been satisfied with their work. The Jeep is at Shop B to have the pinion seal replaced. Shop B states that Shop A severely over torqued the yoke to the point the yoke is damaged and needs replacing. New yoke, crush sleeve plus install. Parts $189.12 / Labor $862.50 total $1,079.52

December 2022 – I discover front pinion seal is leaking and take it back to Shop B. Shop B is blaming the pinion seal leak on the front drive shaft hitting the transfer case skid plate. I became aware of this issue a year ago, when drooping the driver side wheel, the front drive shaft will make contact with the skid plate. I’ve got three problems with the explanation. One, since the July 2022 repair I’ve not flexed out nor given it any abuse like I normally do. If I had been out wheeling and doing my usual stuff I’d probably buy that explanation. Two, when I went up to Shop B to speak with the mechanic, he had it on the lift and stated it is fully drooped. I pointed out that he had not disconnected the swaybar links and when he does he’ll find it will droop a lot more. Three, the mechanic stated something like “I’m going to go over it really good this time. I'm going to check the backlash and everything” I’m thinking for $862.50 in labor he should have gone over it really good the first time.

I feel Shop B didn’t do the work correctly. I’m trying to obtain as much information as possible so I can clearly speak to the owner about my disagreement with his mechanic.

What are your thoughts?
 
I had to replace my pinion seal a second time after I figured out the cardon ball was bad and my front shaft was vibrating and causing my leak. Is your shaft bent or out of balance?
 
I had to replace my pinion seal a second time after I figured out the cardon ball was bad and my front shaft was vibrating and causing my leak. Is your shaft bent or out of balance?

Great questions and I don't know the answers. Here is a photo of what the groove looked like in Feb 2022. Pretty much how it looks now, although I'm no longer using the UFC skid plate pictured. I tend to write/talk way too much and was trying to keep my post short. Here's some more info...

August through October 2021 – installed 1” body lift, 1” engine lift and UCF trans belly up skid plate with 1” tcase drop kit. I shouldn’t have purchased the belly-up skid, I was trying to make it work.

November 2021 – did some lite off-road testing at my favorite off road park. I took it easy, didn’t hit any difficult trails. I was nervous and for good reason as the tcase was slightly rubbing the UFC tcase skid. I'm sure the UFC skid wasn’t designed to be use with a tcase drop kit. I grinded down some of the skid plate to make room for the tcase and it seemed fine.

December 2021 – Went from Texas to Arkansas Hot Springs Off Road Park where I discover my front diff pinion seal is leaking and my front drive shaft is grinding hard on the tcase skid plate while drooping driver’s tire.

February 2022 – I grind down the UFC skid plate for the front drive shaft to clear, but it still hits.

July 2022 – Prior to Shop B work I switch back to the factory transfer case skid plate. I finally realize if I wanna belly up I'll need longer drive shafts.

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