Hi, I'm changing differential oil soon. Got 2 bottles of Mobil 1. Almost everywhere I've read says a pump (or siphon) is used to put new gear oil back. Is a pump really needed ? It seems that there is room adjacent to the filler plug to tilt the oil bottle .... maybe not ??

Thanks !

 

Im not sure, but you should be able to pour some into a smaller bottle/cup and pour it in. It may take 7-10 pours but you should be able to do it. I have done it with other RWD cars. Let us know how it works out for you.

 

No man, not enough room. I've tried it. You'll need a small pump.
C.

 

I agree a pump is the best way.

But if you are stuck, as I was the last time (couldn't find the #@%$ pump)

With the right rear wheel removed, a few feet of neoprene tube & a funnel...
You can fill from the wheel well

 

No, it isn't needed. You can always drop the whole rear final drive out of the car and do it with the tilt bottle method like so:



I was replacing the rear final drive at the time with an limited slip unit, otherwise I would never spend 3+ hours on a diff R&R just to change the fluid. You'll need a small pump if you want to do it while the RFD is still installed on the car. I had tried it before and had to go out to buy the pump. The 6MT trans is the same way, i.e. need a pump.

 

You should be able to find a 'mechanic's syringe' for about $10. Alternatively, just buy one of those re-fillable ketchup or mustard bottles, and use it to squeeze the fluid in. It requires several fills of the bottle, but it should be your most economical method. Just make sure your squeeze bottle doesn't leak around the screw top, or it can get a bit messy.

 

I must say that out of all the pumps I have tried so far, the Amsoil Hand Pump has worked the best...

Me and 2 of me other fellow G owners did our trannies and differentials using this one pump (shared).

Put in the best Amsoil had to offer too!

https://www.amsoil.com/storefront/g2039.aspx

 

well if u have access to an air compressor you can do this. I have one at my house i use for air pressure or just working in my garage. grab a bottle of oil sand use the cap with the snout. Put a rubber house at the end of this secure it tight pinch a hose on the top of the bootle like 1/4 inch and blow compreesed air in there with an air nozzle. the air pressure makes the fluid rise up into the diff.

 

Go to a boat supply store such as Boat US or West Marine. I bought a pump that is the same as the Amsoil pump that someone mentioned above. You can use it to drain as well as fill any differential or transmission.

 

No, a pump is not required. I just backed it up so that my rear tires were right at the edge of the garage where the driveway dropped off. Gave me plenty of room to put the bottle in the side and squeeze. Could not get it all in, but I just refilled with the second bottled and continued on. Took about three refills.

 

I'm not quite sure what you mean, but if you had the G at an angle when you filled it, you may not have filled correctly. The proper proceedure for manual trannies and diffs is to fill until the fluid drips out. This can't be done properly if the diff or tranny is at an angle. If you want a REALLY easy way to fill the tranny, remove the shift lever

 

Just did both of our G35's.

You have enough room to get the bottle into the fill hole, but the angle of the bottle will limit the amount you can put in (the fluid collects at the other end of the bottle), just keep squeezing and the bottle will compress and you will be able to slip it up (between the axle and the suspension) higher to get more fluid out of the bottle. It will take both bottles to fill the diff, both bottles will have a little fluid left in them when the diff is full.

 

Sorry, could have been a bit more clear in my earlier description. The vehicle is level. The ground is the only thing dropping away. Just back the car up until the rear tires are right at the lip of the garage. (This is assuming you have a driveway that slopes away from the house) This gives you more room to get to the diff. Wingsprint correctly describes the procedure.

 

For those who are wondering...

Few other tips: This procedure is easier and faster than changing your engine oil. Drive the car for a good 15 to 20 minutes prior to changing the diff fluid, the warm fluid will flow better and you will get a more complete drain of particulates (remember there is no filter in the diff)Remember to wipe the magnet clean on the bottom drain plug. Make sure you use GL-5 fluid (Mobil 1 75 - 90 is good). If you have to jack up your car for access- over fill the diff (without putting the top drain plug back in) and drop the car back to level for a few minutes, this will ensure that the diff is filled to the proper level.

Both of my G35's had a substantial amount of "junk" in the diff after 11,000 and 14,000 respectively.

 

IIRC, the diff calls for an 80/90W which the mobil 1 isn't offered in. 75/90W would probably be just fine in real life, but it's not what Nissan calls for.