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Tranny fluid dipstick measurement help

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Old 02-14-14, 10:30 PM   #1
RA40
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Default Tranny fluid dipstick measurement help

I need a measurement from tip of dipstick to top-hot level marker.

The ferrule on mine has slipped so it is not giving an accurate reading. For the longest time I felt it was overfilled but when I did the drain routine this time I reduced the level of fluid. It slipped out or didn't go into gear with repeatable regularity. I have it filled to where it engages properly but I need to be able to know the hot level so I can monitor it more precisely.

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Old 02-15-14, 01:09 AM   #2
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Mine is a JDM 98 Celsor and the length is like this below. From the lower end to the stopper is 636mm = 25.04 Inch.

I had a similar problem with you. When I filled the Type IV ATF up to the middle of the cold marker, the reverse was not engaged quickly. I added some more till the engagement becomes OK. After running about 20 minutes, the level was just at the top end of the hot marker. I measured the level again after 1 hour of driving and I noticed that the level was a bit exceeded. But I am keeping this level because I found that was the best level for my AT after repeating drain / fill a few more times.
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Old 02-15-14, 03:34 AM   #3
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Thanks Yamae.

I've noticed that ours tends to shift properly when at hot, the level was above the hot operating level. Some drain intervals, more comes out than expected. What comes out is measured to what goes back in though. Still want to reference the dip stick when I re-fill so I know where the fluid level is.

When I second guess the level based on the dipstick, that is where I have to adjust levels for proper tranny engagement. One of those instances, "Don't fix what isn't broken"...well, I attempted to adjust the level based on the dipstick.

I did the same on dad's Corolla and even though this was an original factory fill. What came out was measured to what went back in, the level indicated on the dipstick is higher at operating temp.
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Old 02-15-14, 05:06 AM   #4
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On something as critical as this, I would replace either the dipstick or the dipstick tube, whichever has failed, both are cheap and transmissions are expensive!

The amount that drains out is related to how long the drain bolt is out! - if the bolt is out for 2 minutes, you might get 2.5 quarts, whereas leave it out for 24 hours and you might get 5 quarts!

I keep mine ever so slightly higher than the top of the HOT area (perhaps 2-5mm) with transmission hot on very level ground. This Aisin design is more tolerant of slightly overfilled than underfilled!

I don't pay any attention to the "cold" mark except to get it roughed in when changing before going on an extended test drive to get it nice an hot for the final accurate topping up

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