Diff./T-Case Fluid Capacity

[MINISuperCooper]

I was having work done at a local shop. (The shop is extremely reputable in this area. And they only work on Honda and Toyota.) Anyway, I went ahead and had them change the differential and t-case fluid. (I had them put Amsoil Severe Gear in.) This was a week or two ago, and I meant to ask this sooner, but I brought them 7 quarts. I had looked it up in the manuel, and it needed around 6.2-6.3 quarts. So, I was expecting to have some left. They didn't put the left over fluid in the truck, so I went in to ask them for what was left. He went back and asked the tech. He said that it took almost the entire 7 quarts. There was a little bit left, but not enough to mess with. I thought…Hmmmm.

So, my questions is: Did I calculate wrong? Did they overfill all or one of the above? If so, will it matter? I know it can't be as risky as overfilling the transmission, but I don't want to damage anything.

Thank you! :thanks:

 

[ben550]

There is fluid lost when doing the transfer. Some stays in the pump. When I change mine I usually top it off to where it starts flowing out of the fill plug and i let it drain until it is only a trickle. I used just under 7 quarts for both diffs and the transfer case.

You should be fine. If you want to check to be sure one is not overfilled you can open the fill/check plug on each while you're parked on level ground and see if anything drains out. If so let it drain until its only a trickle and close it back up and you should be fine.

Its not as finicky as the transmission but does need to be close to the mark. I'd say the one that needs to be the most "exact" is the transfer case.

 

[MINISuperCooper]

Awesome! That's what I needed to know. Sounds good! Thank you! I may get under it and check, but I'm not going to lose any sleep.

 

[ecally]

Just did mine yesterday with the same Amsoil Severe Gear. I also purchased 7 quarts. From what spilled, and what stayed in the pump, I was left with about 1/3 of a quart out of the 7.

 

[fdbyrne]

Always top them off after driving it for the first time after the fluid change. You'd be surprised how many air pockets are in there. Even when it pours out, it's never full the first time.

I've had to add quite a bit almost every time I've changed mine.