Gear oil ?

Does anyone know what type of oil goes in the rear end of a 82 xj750?

 

SAE 80-90 GL-4 Hypoid Gear Oil.
You can use GL5 80/90 or anything close.

 

How easy is it to drain and refill the rear end?

 

A snap.
Locate 17mm drain plug under drive unit (you are going to want to ride the bike around first to warm up the oil and get the particulates circulating so they will drain out) and place a catch basin under it. You will see less than a quart so it doesn't have to be huge.
Remove the filler plug. Then remove the drain plug.
Clean the drain plug. Reinstall and tighten securely (directly quoted verbiage from the Factory Manual). I'd give it at least 10 ft/lbs.
Add gear oil until it just reaches the servicing hole edge and reinstall the filler bolt using the same method mentioned earlier.
That's it, nothing to it.

 

Awesome, that's nice and easy!

 

Any thoughts about spraying some friendly solvent in there and fishing around with a Q-Tip to remove more of the particulates that settle out, or is that just over-the-top ??

 

It must really suck to live someplace you can ride almost every day and have to look for things to do to keep you in the garage. :wink:

 

LOL no kidding. This spring is killing me, it's been hovering around 32 degrees for two weeks and the roads have been clear as long as that. Except for my driveway and my neighborhood. Damn Alaska.

I've been looking for things to keep me from studding the tires on the XJ.

 

I've never flushed the rear end, I couldn't say if douching it would do any harm or not.

 

For Heaven's sake, let's not talk about rear end douching on this board any more!

 

You can "rinse out" the differential by using a little diesel fuel or kerosene to flush out any particles left behind after draining it. Just make sure you let it drainout well afterwards. I rolled up piece of paper towel and stuck it in the bottom hole to soak up an residue and put the plug back in. Then fill'r up with 80-90w hyphoid gear oil. I use Synthietic in mine as I ride in a colder climate and want better protection on cold days.

 

Robert, for proper filling don't you want to make sure the bike is on the centerstand while refilling the new gear oil ?

 

Something hit a little too close, there, Chacal? :lol:

 

I think we have reached a new (yet hilarious) low :lol:

 

For Heaven's sake, let's not use the word "hit" in regards to rear end douching on this board any more!

 

I would strongly suggest that you not use any sort of solvent to rinse out the rear end. The residual solvent can wreck the oil film layer on the gears and bearings and take them out. I've seen it on large industrial gear boxes (1000+ HP) a few times and it ain't pretty. If you are concerned about "flushing" it out, I'd do a change with cheap oil, ride it a week or so and repeat. Eventually you'll get it all out. Remember the old addage, "The solution to pollution is dillusion".

 

Alright alright, I'll leave it alone. Sorry Chacal, I did not think of the ramifications of my verbiage.
Brtsvg, you are 100% correct. The bike needs to be in on the centerstand to get a proper reading (that or a lift). Thanks for that timely reminder, glad you caught it.

 

Hey robert i am sure he diddnt want to hear about "Ramifications" Back to the topic at hand boys and girls yea you want to have it on the center stand when doing it. also you'll want to use a large funnel to get the downward angle you'll need when draining or you'll have a greasy tire to wash.