Yes Bob, you are correct.

I remember a warning in the instructions that come with the unitized seals that a speedi sleeve can not be used.

 

Man Volvo's are awesome. :lol: Just bustin on ya a little bit. Good luck.

 

replaceing a diff due to a leaking input seal?

a differential input/output seal does not even run on the pinion shaft... so, i doubt that the seal has worn a groove in it : (

 

Boh this is the 4th time it has failed in less than a year there is something else going wrong there. Seals do not keep blowing without reason. You may install one badly every know and then and that would explain one but 3 in a row sorry I am not buying that one. Look at the problems excessive endplay slop in the shaft he could have a bearing going out and that is causing a wobble and taking out the seals. Do not always look for the easy way out like a couple foreman I had as a driver they always cost the company more in the end when the trucks broke down on the side of the road and had to be towed in when they did break down. Instead of band-aid repairs diaig it right and fix it the first time that way you will not have the problem again Allen regardless of what some others may say.

Case in point in 1996 I had a rear diff go out on me boss put a reman in the truck. I told the shop there was something wrong with the reman foreman told me I was a quote DUMB ASS FUCKING TRUCK DRIVER WHO DID NOT KNOW WHAT THE FUCK HE WAS TALKING ABOUT. end quote. By the way I am an ASE certified Master Heavy Truck Mech since 1994. I told the boss my issues and he said if if breaks on the road we will fix it and take it out of the shop FOREMANS salary. He being the shop foreman was VERY PISSED when he found out he was going to have to pay the boss back that 10K repair bill for not just the rear diff but the housing and the front one and power divider that the reman took out when the pinion shaft snapped on I-80 in Des Monies IA.

 

So, based on this logic, if he had a leaking rear main seal on the engine, which had occurred more than once, even though the engine was performing acceptably in every other way, your recommendation would be to install a complete factory reman engine costing 15 grand+.

Sorry, I just ain't agreein' with your logic.

And as Bob H said, the seal rides on the yoke. How the hell is a groove in the input shaft going to impact the seal?

Worn splines on the input shaft could cause the yoke to loosen and pound out the seal, but with a unitized seal grooves even in the yoke seal surface are far less critical than if it was a conventional type seal.

 

Splitshifter we are still talking the same issue with worn splines that keep pounding the seals out the one and only way to take care of the problem PROPERLY is to fix the issue causing it. As to someone suggesting I would suggest remeoving an good engine with just an oil leak and put in a REMAN GET A LIFE. Yes my maintance measures are extreme but when you pull stuff that likes to go BOOM and take out other things with it namely YOU called do not take chances.

Try having a foreman this is when I was pulling wrenches myself put a trailer that hauled 100% pure HYDROCHLORIC ACID and it had a leaking emergancy shut off valve in it. I placed it OOS because of it the foreman a total jerk forged my name and placed it back into service. Trailer comes back LOADED with 48K pounds of acid on it and the valve is dripping ACID out of it. I am the lucky bastard that get to repair it so we can pump it to another trailer. The leaking valve dropped out of the trailer and dug the boss his NEW fuel tank holes for him. Those tank holes held 2 tanks at 10K each. As for the oil leak problem I would drop the trans pull the bell housing and then oil pan and rear main seal figure out what is going out with the seal and why it keeps blowing them then fix it RIGHT the first time.

 

Exactly!

Just don't replace a lot of perfectly serviceable parts and throw a lot of unnecessary money at it to do so.

 

Same diffs as every other truck on the road

 

Sorry dude, NO SUCH thing, 25% or 50% hydro, thats all there is.Better do your homework next time.

As far as worn splines, the yoke bottoms out on the bearing when it is tourqued down, therefore even if the splines are worn it wouldn't make any difference in the seal.

Maybe its the wrong yoke.

 

Manic this company has made its NICHE hauling this stuff. I have seen the Manifests for it repeatily while working for them. It does exsist and has a PH of around 2 took a stainless steel tank lined with glass to haul it and special equipment to handle the crap. The trailers on this stuff have a life expectancy of only 5 years total before they are SCRAPPED due to simply losing the lining on the tank. He also pulls almost pure hydrogen Peroxide for other customers he loves the dangerous stuff and makes a fortune doing it. His drivers that pull those 2 loads make on avrage with him 90K a year NET they are paid percentage of the load and all waiting time.