"I am sure you already know, fit a proper trailer axle would be best."
With the truck axle you have a lot of necessary moving parts that can fail and have bad results. Not to mention all the drag that is affecting your MPG. I uses a rear axle out of a front wheel drive dodge caravan...
his axle is just fine, there is no need to swap the axle, in fact he is better off sticking with the axle he has, as its much heavier duty, and also contains a spare 3rd member for him
The comment "be sure it contains enough oil" covered that.
But right, its not as simple as 'flipping it over'.
you can fill it to the appropriate level, or with the correct amount of fluid, but if its running up side down it will drain out, and if its running in revers, it will no properly lubricate the seals and bearings, thus causing serious damage needlessly
Yes I understand all the benefits of swapping over to a different axle and might do so down the road. What I was trying to figure out is, if the axle is turned around, so in the mind of the axle its running in reverse, would there be any problems? That way the vents/plugs etc are all in the normal positions its just running in reverse.
see above comment, yes you will burn out your pinion bearing and seal fast
The two options you mentioned both leave you running in reverse...
(1)having the the axle facing backwards with the pumpkin facing right side up or
This would not lift the trailer without welding new perches on. And your gears will run reverse.
(2) having the axle point in the right direction but be upside down.
This would give you the lift using existing perches. And your gears will run reverse.
To achieve the desired results: have the the axle facing backwards but be upside down. No new perches, Gears run correct direction. However I think running it upside down will create major issues...
yes upside down will not allow for proper oiling of seals, even if running in the correct direction... your 3rd member has oil galleys and passages that are intended to channel the gear oil to all the bearings and seal to insure proper lubrication. if the axle is upside down they wont work, if the axle is running in reverse they wont work
Yes you are right, I figured wrong (oops) no matter what the axle will need to be upside down.
MX21 while you might get away with doing one of these "tricks" in a pinch, you will soon burn up bearings and seals, and it wouldnt take long, a 50 mile trip and you have a toast bearing or seal or both. and while it might not be super bad right away, over time, it will get worse and worse. it will compound on itself untill you have no seal left and are allowing dirt and other crap to get in there and eat up the rest of the bearings and gears, and gum up your fluid. spend $50 and get new spring perches and pay a shop $50-100 or buy a buddy a case of beer and have them weld new perches on top of your axle for you and do this correctly. other wise yes you may as well go and get a "beam axle" and retro fit that into the trail, but again thats gonna cost you money. im not saying these other guys are idiots or dont know what they are talking about -because in theory what they and you are proposing is correct, but it wont work for very long and it will cost way more in the long run if you do that.