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Old 12-07-2006, 11:34 PM   #1
williaty
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Default When Do I Check The Tranny Oil Level?

I'm trying to figure out when to check the transmission oil level. As I see it, there's several choices:

1) Once everything is hot, screech to a halt, jump out with the engine running, and check the oil ninja quick.

2) Once everything is hot, park the car, shut off the engine, wait 5 minutes or so, and check the oil.

3) Once everything is hot, park the car, shut off the engine, wait an hour or so, and check the oil.

4) Leave the car over night and check it stone cold.

In my experience, a modified (relaxed) 1# shows just the bare tip of the dipstick wet. #2 shows it to be at about the L line. #3 shows it to be about the F line. #4 reads WELL above the F itself.

So which reading do I believe?

Ty
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Old 12-07-2006, 11:52 PM   #2
06grayrex
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Default

I take it it's a auto????? I would check what the owners manual say on when and how to check it. The dipstick may also say on it how to check it. It should be on level ground though. Most Manufactures will say to check fluid when hot while idling on a level surface and in neutral, some will say park. Some will have a hot and cold marks on the dipstick, so in that case then just check it on a level surface.

Last edited by 06grayrex; 12-07-2006 at 11:57 PM.
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Old 12-08-2006, 12:42 AM   #3
williaty
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No, manual tranny. And neither the owner's manual nor the shop service manual say when to check it. There's only one set of marks on the stick, not labeled hot or cold.
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Old 12-08-2006, 01:10 AM   #4
06grayrex
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According to my owners manual just says to park the car on a level surface, stop the engine, pull out the dipstick wipe clean and insert it again. Pull out dipstick again and check the oil level on it. If its below the lower level, add oil through the dipstick tube to bring oil level up to upper level. On that note, I would say that your #2 would be the best way. Now I have a wrx not a 2.5 rs but I cannot see the two being that different on checking procedures.
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Old 12-08-2006, 01:22 AM   #5
williaty
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No, they're the same tranny, so I'm sure they're the same. Oddly, my manual and the shop manual both say to check it on a level surface, but no advice as to time. I wonder if it was a sentence that got edited and that bit hit the cutting room floor and then the mistake was caught and the page replated?
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Old 12-08-2006, 01:30 AM   #6
06grayrex
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Who knows????????????
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Old 12-08-2006, 02:56 AM   #7
Alan
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On the pre-delivery checklist the transmission fluid level is done BEFORE running the engine and warming it up. And on turbo cars with the hot turbo and downpipe there's really no safe way to check it with the engine hot. So I check mine monthly on a cold car. And it never uses any or ever needs any added..
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Old 12-08-2006, 11:45 AM   #8
leecea
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The Service Manual tranny fluid replacement section gives the final step as:

3) Fill the transmission gear oil through the oil level
gauge hole up to the upper point of level gauge.

So, according to that, the correct level is the upper line when the tranny is cold.
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Old 12-08-2006, 11:55 AM   #9
Psydotek
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Don't forget to make sure the car is level. Even the slightest incline/decline can make the dipstick read funny.
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Old 12-11-2006, 03:07 AM   #10
dbrunner
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Default

Figured I bump this thread..

I checked my transmission fluid the other day (MT), wasn't seeing anything on the stick except for a little dab on the bottom. So I was worried and decided to change it on Sunday, along with rear diff. Filled it back up with some Red-Line 75w90, and the dipstick was reading exactly at the full line (was kinda bubbly/foamy too).

Well now, I've tried checking the dipstick again to see where it's at and I can't even get a reading on the dipstick. I checked when it was cold, I checked when I got home from a drive and the engine was still pretty hot, then I also checked when the engine cooled down a bit for 5 minutes. Still isn't showing anything. No leaks, drives even better than before, no noises, just a damn dipstick that doesn't want to read properly. Anybody experience this?
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Old 12-11-2006, 06:50 AM   #11
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Wait longer, like overnight and then check it again. Make sure the car is on level ground.
You should have kept track of how much fluid you put in, the correct amount is 3.7 qt.
Also I hope you used Redline 75W90NS and not the regular 75W90 or you may have synchro issues. The 75W90 has friction modifier which you do not want in the transmission.
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Old 12-11-2006, 09:57 AM   #12
dbrunner
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Default

Cool, I'll take a look at it in a little bit. I remember puting in at least 3 1/2

I used the 75W90NS too, btw. I wanted to say 75W90NS, but I wasn't sure what two letters were on the end so I just said 75W90
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