Muttstang

[nvr2fst]

Congrats Ron on the invite. The Muttstang is one of my favorite builds on Lat G.
Youve taken that car to extreme levels in style and performance!

[57hemicuda]

Don't know if anyone else that is running a full floating rear is experiencing the same issues I am. It seems the inner axle seals just won't stop leaking. These rears are unique in the fact that you pack the outer wheel bearings with grease, and seal the gear oil in the center section. They don't want the gear oil getting to the wheel bearings and cleaning the grease out of them. I have replaced the grease seals 3 times, and they just let the oil leak into the wheel bearings constantly.

It was so bad that on my AMX rear I machined the inside of the axle tubes to except Dana 44 front inner axle seals. Figured that is what the OEM did and it should work, but that didn't fix my Mustang.

On the Mustang I vented the center section, and each individual axle tube thinking they were building pressure blowing past the seals, didn't help. Glued the aluminum seal housing in place thought maybe it was leaking past the O rings, didn't help.

Several calls, and a bunch of investigation later this is what I found. Due to the cambered axles, Nascar uses these funky seals that have the ability to seal even when there is a fair amount of misalignment. It is a dual seal, in which you pack between the two seals with axle grease, installed them today, they seem really nice, will let you know how it goes.

http://www.sealsit.com/specs/axlehub.pdf

[GregWeld]

Did you put them deep into the axle tube as shown in the diagram - or leave them out at the end of the housing?

[57hemicuda]

The aluminum seal housing has a shoulder on it, so the seal housing goes in until it hits the shoulder then won't go in anymore. Its pretty idiot proof, even for me.

[GregWeld]

I love products like that!!


LOL

[CURVES]

Thanks for sharing, nice to know before I install mine.

[57hemicuda]

Originally Posted by GregWeld

Did you put them deep into the axle tube as shown in the diagram - or leave them out at the end of the housing?

Just in case you didn't understand Greg, the seals install from the center. You have to remove the third member to get to the seal, that is what makes it such a pain in the butt. At first I thought it was just because the Moser axle wasn't polished at the seal surface area. Had a machine shop put the axle on a crank polisher and make it shiny. Got what the O.D. was supposed to be from Speedway before polishing, to be sure I didn't make them too small.

There is not enough inside diameter on the IMSA snout to fit a seal out at the wheel. The 2.5" Grand national snout does also have a outside seal. I just didn't like how close the wheel bearings are together on the GN style. The extra seal is a definitely an advantage though. Wouldn't stop the center leak but should keep the oil out of the wheel bearings.

Hoping this new style seal fixes the problem. Had the car out yesterday, did a Pro Mod burnout across the Conowingo Dam, car is so fun to drive.

[GregWeld]

Originally Posted by 57hemicuda

The more I thought about it Donny, the more I think it really isn't a lubrication issue. Once the oil runs down the tube and into the hub its trapped, can't get back up in the tube and back to the center. Nothing lubes like an oil bath, all 3/4 and one ton trucks lube that way, so do tractor trailers. They have way more load then anything we do. Hell the snout that I'm running on this Mustang and the AMX is the exact same snout used on the rear of a late 60's early 70's 3/4 ton dodge truck.

I think the issue is more of a seal failure out at the wheel, slinging gear oil all over everything, brakes, tires, the track. Could be a bit hairy if you didn't know it was happening. Just my thought.

I would agree with that line of thinking.... that it's more of a seal issue... and that the bearing GREASE doesn't liquify at high temps the way the gear lube does.... so keeping it "in check" isn't as much of an issue.


All the hubs on my semi truck and trailer are oil bath.... and I run down the road at 58,000 lbs laden.

Originally Posted by 57hemicuda

Just in case you didn't understand Greg, the seals install from the center. You have to remove the third member to get to the seal, that is what makes it such a pain in the butt. At first I thought it was just because the Moser axle wasn't polished at the seal surface area. Had a machine shop put the axle on a crank polisher and make it shiny. Got what the O.D. was supposed to be from Speedway before polishing, to be sure I didn't make them too small.

There is not enough inside diameter on the IMSA snout to fit a seal out at the wheel. The 2.5" Grand national snout does also have a outside seal. I just didn't like how close the wheel bearings are together on the GN style. The extra seal is a definitely an advantage though. Wouldn't stop the center leak but should keep the oil out of the wheel bearings.

Hoping this new style seal fixes the problem. Had the car out yesterday, did a Pro Mod burnout across the Conowingo Dam, car is so fun to drive.

I could see that the diagram made it APPEAR that the seal was nearer the carrier.... and that was why I asked -- because it didn't appear to be installed from the hub end... and I thought --- MAN! Ya gotta drop the pumpkin to install that and maybe it just looks that way in the drawing.

[SSLance]

Originally Posted by 57hemicuda

Just in case you didn't understand Greg, the seals install from the center. You have to remove the third member to get to the seal, that is what makes it such a pain in the butt. At first I thought it was just because the Moser axle wasn't polished at the seal surface area. Had a machine shop put the axle on a crank polisher and make it shiny. Got what the O.D. was supposed to be from Speedway before polishing, to be sure I didn't make them too small.

There is not enough inside diameter on the IMSA snout to fit a seal out at the wheel. The 2.5" Grand national snout does also have a outside seal. I just didn't like how close the wheel bearings are together on the GN style. The extra seal is a definitely an advantage though. Wouldn't stop the center leak but should keep the oil out of the wheel bearings.

Hoping this new style seal fixes the problem. Had the car out yesterday, did a Pro Mod burnout across the Conowingo Dam, car is so fun to drive.

So this seal that goes on the diff end of the axle, is that the high dollar version or the $29.99 version of their seal?

[57hemicuda]

These are the expensive ones, I think they were like $70 a piece.