Rear Differential Fill Level ?

[Chris142]

Fill till fluid runs out

 

[Hall]

Most Toyota service manuals recommend a specified distance between the fill opening and the fluid.

I've seen that, but how do you measure inside there ? At the end of the day, I don't believe it's super critical. If you can bend one finger digit in there and feel it, it's enough. You can't overfill it as it will flow out and self-level.

 

[Lubener]

I do not know of any typical gearbox, that you just dont fill to the level of "dribble" out of the fill hole, and call it good.

The illustration sucks.

The parts are splashed lubricated. Anywhere from quarter inch from the bottom of the fill hole won't make a difference as long as the gearbox is not overfilled for whatever reason as to cause aeriation.. Don't make a science project out of it.

 

[hrv]

This is not rocket science....On my Honda awd....drain it...fill it back up till fluid dribbles out and you are done...and get on with your life...Some like to make things much more complicated then they are....KISS...Keep It Simple Stupid....

 

[GSCJR]

I've seen that, but how do you measure inside there ?

Filling by volume, which I have also done in the past. For example, diff. .47LT, T/C. .94L, and so on according to specs.

 

[burbguy82]

The parts are splashed lubricated. Anywhere from quarter inch from the bottom of the fill hole won't make a difference as long as the gearbox is not overfilled for whatever reason as to cause aeriation.. Don't make a science project out of it.

 

[Hall]

Filling by volume, which I have also done in the past. For example, diff. .47LT, T/C. .94L, and so on according to specs.

True, but so many procedures say to measure it by sticking your finger in there, curling your finger and guesstimating it's 1/4" below or some value.

 

[GSCJR]

many procedures say to measure it by sticking your finger in there

Correct, except Toyota.

 

[Hall]

Correct, except Toyota.

Was curious so I just checked my wife's new Toyota and all it does is tell you what fluid to use and how much. It does say "the fluid capacity is a reference quantity" though. There has to be an internal procedure then. If you add that reference quantity and it starts dribbling out before you've added it, what's the rule ?

 

[GSCJR]

I've done it both ways @Hall , it will not spill out when the quantity is measured. The measurement provided by Toyota has always been accurate in my experience.