y5mgisi
1 ton status
Good deal! Bet those 8 days flew by.
sweet. will that be in this thread or in a new thread ?

Other than that the only other odd thing that happened was the rear axle overheated on me twice. I could feel the truck lugging hard like it was pulling a hard load so I stopped to take a look underneath and my nose and eyes discovered gear oil pushing out of the vent tube while oil was getting baked on the exhaust. This was on the main paved road in Death Valley as we were headed to the Race Track trail head. It happened again a few days later as we were crawling out of Death Valley headed to Beatty, NV on the highway. Oddly, when I checked the fluid level it was fine but then again, I do over fill these a bit by tilting the axle when I fill them up. The plan is to find a larger rear cover then move to synthetic oil. I’ve never had a rear axle overheat on me ever before in any vehicle....Very odd feeling. The steep 8% grades with elevations going from -200 ft. to 7,000 ft. within an hour probably also contributed to the oil getting pushed out. Still odd how it noticeably loaded the engine like dragging sled.
I know it's not a powerful, fuel efficient, torque laden diesel

Man, I think you're reaching with your explanations. You know as well as I do you were doing nothing that should have caused this issue. I have seen (as I'm sure you have too) 14FF's overloaded daily that kept coming back for more day after day (the C30 tow trucks that hauled cars into the shop on a daily basis, the masonry contractor that hauled two cube of block daily, etc). This is very perplexing to me. Why the drag on the motor?? I know it's not a powerful, fuel efficient, torque laden diesel, but that is something that really bothers me. It's not hot outside yet. We dealt with MUCH higer temps last summer and nary a peep out of that thing (or mine and we scale out pretty close in total weight). That, and, you are not even close to over-working that thing. Me thinks this thing is letting you know something is amiss. I'm all for a diff cover. I think they are cheap insurance over a peeled (or poked) cover. Not a repair you want to make where we go. Synthetic lube?? I really don't think it should be necessary, but then again oil is cheaper than metal parts. I think if it was mine I'd take a backlash reading and then pull the pinion support and shafts to do a full bearing inspection. If nothing else, it will give some peace of mind that a gremlin is not lurking in there ready to spoil the next outing.
Glad everything went well for you on the trip. Now, to quote you from my threads, "Wheres the pics already??"

Are you sure that this noise isnt coming from the rear diff?


I don’t know what to tell you genius other than what occurred a couple times with the rear axle is the same type customer complaint we get from RV customers that overheat their rear axles pulling long steep grades. In fact, our Durastar truck even comes with a rear axle temperature gauge.
On the 1,300 mile journey back home the rear axle worked just like it always had. No noises, vibrations, etc. I cruised 80-85 MPH all the way home once I hit I-25. I am anxious to get the cover, pop the pinion out and rear hubs off to see if there is anything funky going on in there. Very odd deal indeed.
The 205 POS transfercase is another story. That turd is coming out again and getting chucked in the iron pile and replaced with the one I pilfered out of my dad’s old wrecker. Tired of the noise! Something is not right with the 205 in my truck now. It sounds like it is coming apart at highway speeds when driving down hill with a slight tip in of the throttle. At full coast it is fine, at full throttle it is fine, at cruise it is fine.....but roll down an incline where just a blip of the throttle is needed, it sounds like it is about to blow. Me think the idler gear is bouncing around inside the case.
Cool, I won't need to go find it.![]()


Just out of curiosity, do they experience the excessive drag too?? If it was just the vomiting of lube, it might not concern me as much as the excessive drag that accompanied it.
What do those trucks with the diff gauge run temp-wise?? I know when I installed the temp gauge on my NV4500 I was quite surprised at how hot it would get pulling long hills repeatedly (and how long it would take to cool off while moving), but that was on a hot day. On a cool day, the temp gauge will barely move regardless what I do to it.
) Hmmm, might have to keep that in mind. The other 205 I have has been in the family since that truck was new. I feel comfortable with the history that truck lived although I need to do some research to see what it takes to convert a 10 spline 205 to a 27 spline. A 32 spline would be better but the AA kit I used for the NV4500 swap requires a 27 spline.I have a fresh 205 here if it is of any use to you. 32spl short input, fig 8 pattern.
Swap the input is all you have to do. Both use the same small bore case.
. Also the first time my truck has been to CA that I know of.
It was funnier than hell when he unzipped the bed tent! He jumped back about 10 feet in the air.