Quarts of ULV per Fitzstick Graduation?

[Grumpaw]

I'll add another data set here, bear with me on this:

Please correct me if I'm wrong, but I measured the distance between marks 4 to 5 on the Fitzstick @ 5/16". The stock trans pan is 10¼" x 14½", not including the sloped area at the rear. If we add fluid to raise the level from 5 to 4 on the Fitzstick, we've raised the height of the fluid by approx 5/16" (.3125") So, 10.25" x 14.5" x .3125" = 46.44in³ in fluid volume change. The volume of 1qt = 57.75in³.

46.44in³ is approx 80% of 57.75in³ (1qt) so that's .8qts per .3125 change in fluid height, i.e. marks 5 to 4 and vice versa.

This exercise does not take into consideration the total system volume, just fluid volume changes in relation to changes in fluid height.

Ultimately this info is useful when adding or removing fluid to attain the desired level as determined by the Fitzstick.

So my final answer to the original question is 6.4oz per graduation:

4 grads between numbered marks = .3125 ÷ 4 = .078"
10.25" x 14.5" x .078" = 11.6in³. 11.6 ÷ 57.75 = .20qts = 6.4oz.

This can be calculated to a finer degree, but I'm stopping here.

But, only 3 can I count too.....6 if both hands I use,,,,,,

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[Ranger_Rocks]

I heard that Beemers and/or Audis don't have engine oil dipsticks. Apparently there is a oil level sensor in the sump. ....no thanks.

Our '94 Jeep Grand Cherokee 4.0L had an engine oil level sensor that triggered a cluster warning light. Very useful in the event of an unknown leak. Nice to have a light before lockup.

 

[HeatXfer]

Wait!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!..... the pan volume is part fluid, part valve body, very difficult to calculate accurately.

Aha! Thank you for that! I wasn't thinking the valve body was submerged and displaced so much fluid.

I've edited my post.

 

[harringtondav]

You guys, I so appreciate all the input, but calculations are only as good as the data used to make them, and the pan volume is part fluid, part valve body, very difficult to calculate accurately.

Mike, here's some input you may appreciate: Your stick and funnel are great. They make an essentially unserviceable transmission serviceable.
The fit up of the stick and funnel is perfect. I don't know if you did the modeling for the funnel, but it is exact. I'm a short guy and have to climb over the engine to fill the transmission. Much better than any other funnels I have.
Thanks.

 

[got3fords]

This thread is a good example of why I have checked the fluid level maybe twice since I’ve installed the fitzstick.

man oh man, can I just have knobs, switches and simple to measure dip sticks and fluids?

I know I know… I’m sounding old. But damn come on.

Gotta run. Those dang kids are walking on my lawn again.

How about a simple glass tube you just look at while it's running?

 

[TJC]

Start up your truck on level ground, run it through the gears from park to sport and back to park at 5 second intervals. Immediately check the fluid level. If it is showing on the Fitzstick dipstick no higher than 3/16" you are good. See picture below.

I set my level at the middle of the diamond between 4 and 5 at 215F. Then I let the truck sit overnight. Ran through the process above and checked the level. If your level is between the red lines in the image below the fluid level will be dead center between 4 and 5 at 215F.

It is easier to see the fluid when cold. It doesn't get any easier than this to check your fluid levels.

This works for me.

I'm looking for folks to please validate my process.

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