Chrysler 9.25 question

[ricekrispyota]

Backstory: I purchased a 99 Dodge Ram 1500 with a Chrysler 9.25 rear end. Previous owner used the truck in the snow. Rear axle pinion seal was leaking when I bought it. I took it to my mechanic who put in a new seal but said there was some rust damage on the lip where the seal sits. He did his best to clean it off and installed a new seal with some silicone. Now the pinion seal is leaking again, but only when I drive it. The outer edge of the seal is dry, and I can’t see ta leak, but the u-joint has oil on it so I’m guessing it’s leaking around the pinion and onto the u-joint where it’s being flung around the back of the truck.

Dumb question to follow….. is there anyway to seal this up or do I just keep filling it up until I can put in a new axle (which will actually be a new front and rear so I can regear and put in lockers)?

Any thoughts or opinions are appreciated.

 

[u2slow]

I like the crush-sleeve eliminator so you can fuck around all you want with sealing the pinion.

Put one in an 8.25 years ago and keeps everything easier imho.

Edit: just topping it up might be easier.

 

[TRINDU]

I dont fuck with rusted parts, so I'd just refill as needed.

Buy a 3rd gen disc axle to replace it. Better yet a SRT10 D60

 

[Blueleader]

Did you check to see if the vent is plugged up? Could be building pressure.

Is the oil coming from the seal, or is it seeping through the pinion/yoke splines? I know my t-case will leak oil through the splines if I don't put a little RTV on them.

 

[arse_sidewards]

You sure it's not leaking up the spline?

Pretty common to put a dab of RTV under the nut on yokes and flanges to prevent that.

 

[total newb]

I put it on the washer on the spline side.

 

[ricekrispyota]

Did you check to see if the vent is plugged up? Could be building pressure.

Is the oil coming from the seal, or is it seeping through the pinion/yoke splines? I know my t-case will leak oil through the splines if I don't put a little RTV on them.

You sure it's not leaking up the spline?

Pretty common to put a dab of RTV under the nut on yokes and flanges to prevent that.

I put it on the washer on the spline side.

Good info. Thank you for the responses. I’ll check the breather and throw some silicone on the nut/washer this weekend and see how she goes.

 

[ricekrispyota]

I checked both of your recommendations. The breather was completely clogged so I cleaned that out. When I went to see if the oil was coming out on the pinion splines, I was able to unscrew the pinion nut by hand. Somehow it had backed itself out, so I siliconed as recommended and then got a new pinion nut and torqued it to spec.

Drove it those morning and didn’t see any new leaks or oil being thrown around. Thank you for your help.

 

[u2slow]

Somehow it had backed itself out, so I siliconed as recommended and then got a new pinion nut and torqued it to spec.

Re-torqued used bearings and crush sleeve?
.... I wish you luck.