Gear oil difficult to change

Posts: 341

hadnt noticed before the other day. but when i was looking at the differential to change out the gear oil i found this:

THE DIFF IS UPSIDE DOWN!!! WTH?????

[img]

[/img]

guess i need to put the buggy on a rotisserie to drain and inject gear oil then turn back around???

seriously, i talked with bill at hammerheadcanada and they told be to either pump out old oil or drain from the fill hole on (previously) top(now bottom) and fill from the drain(previously) that is now on top. kinda confusing when you say it like that. but all HH400's are this way evidently. Rolling Eyes

Posts: 17 · Newbie Joined: 08 Sep 2007 Posts: 17 Pictures: 0

What gear oil did/are you going to use?
I haven't changed mine yet.
I was wanting to know what brand and weight you are going to use.

Posts: 341

the yamaha ymf400f manual says to use 80 weight gear oil. so, i'll probably use that. i'm afraid to look at what the chinese put in there. Shocked

Posts: 2650

I always put synthetic in all of these motors and transmissions... i dont chance it!!!

Lucas is real good too, especially if you are abusive!!

john Very Happy

Posts: 2589

If you stand on your head the diff is in the right position.

Posts: 17 · Newbie Joined: 08 Sep 2007 Posts: 17 Pictures: 0

I changed my diff oil this weekend.
I used Mobil 1 75W-140
There wasn't much OEM oil in the diff and it looked like gray anti-seize.
I was able to drian oil out by removing small plug at bottom.
Added oil till it came out middle plug.

Posts: 341

did you add it from the overflow at top?

Posts: 17 · Newbie Joined: 08 Sep 2007 Posts: 17 Pictures: 0

Yep added oil through the top.
I had a small hose that I put in top hole and put other end of hose on oil bottle. It worked just fine.