Tailpipe

No the vent caps are there and I did remove and inspect for any obstructions (none) and reinstalled them. I really do appreciate the advice and opinions of the members. Thank You. I will check the spring seats on Monday. I did change a headlight lens that was cloudy/yellow, after that I noticed that there were 3 small drill holes on bottom edge of the old lens, I assume someone was draining "WATER"? I was told that this truck came from our facility in Alabama. The truck is a 2000 model and hurricane Katrina was in 2005? I think I'm driving a submarine. I would think that the axle would have failed in that time period? How do I identify the axles on this truck? I did post about longer wheel studs and was given a Euclid part number E-10221. I haven't got to that project yet, I just assumed that the axles are the lighter duty Mack axles. The truck was pulling a frameless dump trailer with a 80,000 lb max GVWR in Alabama. I would feel better "IF" there was a Mack recommended axle gear lube additive that I could add to this axle? Any Ideas on a part number? Thank You again for all of the advice.

I thought that I posted this the other day, but can't seem to locate it so I'll try again. I was preforming a first time service on this 2000 Mack CH613 tractor since it was transferred to My location 2 weeks prior to this scenario. Everything was as usual then I pulled the plug on the front drive axle to check the gear lube when a grey like substance came rushing out, I assume it was water that was mixed in with the gear lube, but it doesn't really feel like water contamination it was extremely overfilled. The day before this complete service LOF etc. I installed a new torque arm on that axle, towards the end of the day thought I heard some "Howling" from the rear end. Sorry to jump around here I drained the rear end over Sunday and on Monday decided to pull the axles and remove the top loader from axle that's when I noticed 2 of the top loader bolts were loose and that the silicone gasket was damaged. Could this be where the "water" came from? While we were removing this top loader the aluminum side cover (the one that has to be removed) to get the other top loader bolts was corroded and bulging out ward, could this contributed to this "water" contamination ? We disassembled everything and inspected & cleaned it noticed a couple of small bits of metal chips approximately the size of watermelon seeds but couldn't see any damage internally to any gears or bearings. Cleaned the magnets and reassembled the axle filled all oil valleys and cavities with gear oil, phoned the local Mack dealer or the recently De-Macked dealer ( They sold Mack trucks since they opened 40+ years ago) Maybe Volvo thought they weren't selling enough trucks? Maybe the Mack trucks were tougher and lasted longer? I don't know, anyway back to My story asked service manager about My "water" problem He didn't have a clue, then I asked about gear lube and was told that 80/90 regular would be fine or synthetic would do just DON'T mix them together. I had read some post on here where an axle oil additive was recommended from Mack, asked Him about it He said that " He's never heard of it" before? I would like a part number if someone has it available? We took the truck for a test drive (30 miles) everything seems okay no "howling" or was it a long day at work I heard? I didn't get an oil sample sent out to analyze the content of it. The cover on the second drive axle was also bulging out removed it cleaned it reinstalled it rear axle fluid was fine no "water" Has this ever happened to anyone? or am I driving a submarine?

Thank You that's what I wanted to do steel inside aluminum outside, Thanks again

I'm new here, and I searched some forums for information on part numbers for longer wheel studs for a 2000 Mack CH613 with hub pilot wheels the drive hubs are aluminum and are the lighter duty axles. I want to add aluminum wheels on the drive axles. I can get the VIN if that will help? I'm going to be doing a brake job soon and would like to have the new studs on hand to install at that time. Any recommendations as to where I should purchase them online? Euclid part numbers or other would help. Thank Guys I enjoy Your website a lot.