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Unread 01-14-2013, 12:25 AM   #1
aldersonfilm
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OOPS! Overfilled Tranny

Overfilled the fluid in my tranny. What's a good way to get the extra out, without having to drop the pan again and get a new gasket?

Anybody had success with a hand pump in the dipstick tube? I'm worried about getting a hose stuck in there.

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Unread 01-14-2013, 04:40 AM   #2
rugsucka
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Assuming you don't have a drain plug (my '00 does) it's pump it or drop the pan.

If you are really bold, you could try to drain it a bit thru the radiator send/return lines, but I would expect a mess in your engine bay over that.
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Unread 01-14-2013, 04:50 AM   #3
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Pull the plug.
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Unread 01-14-2013, 07:42 AM   #4
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Pull the plug.
...let it drain. Refill with 3~3.5 qts. Drive, and I don't mean just around the block, let it get warm, check level*, top off as necessary. If you only put in 3 qts. you'll probably only need to add 1/2 qt. after checking the level.

*Drive your Jeep until it gets up to operating temp under normal circumstances, park on level surface, keep it running. Check dipstick level. Should be AT full.

If it's reads ADD...you don't necessarily need to add a whole quart. You might want to drive it around, check it, add a 1/2 quart at a time and so on.
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Unread 01-14-2013, 12:48 PM   #5
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How much did you over fill it? Some transmissions don't mind or even work better (e.g. 42RLE in TJs) being a little over full. All suggestions (plug, pump, cooler hoses) will work. You decide what you are most comfortable with.
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Unread 01-14-2013, 09:28 PM   #6
aldersonfilm
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Don't have a drain plug. Wish I did. But some good suggestions. I think I'm gonna try and pump it out with a harbor freight syphon.

My friend changed the fluid and overfilled it by quite a lot. I discovered this while driving and it started surging and wouldn't go into gear as it warmed up. I'm hoping that it's because the level is high and not a worn band or something. It's also leaking around the pan. People say it will blow out the "vent." Where is this vent?
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Unread 01-14-2013, 09:44 PM   #7
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It can foam when overfilled and that will cause the mis shifts. The vent can blow out the excess and it will drip by the front of the transmission at the inspection cover. You can also blow out seals.

It is better to just get the level correct.
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Unread 01-15-2013, 05:46 AM   #8
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Quote:
Originally Posted by aldersonfilm View Post
Don't have a drain plug. Wish I did. But some good suggestions. I think I'm gonna try and pump it out with a harbor freight syphon.

My friend changed the fluid and overfilled it by quite a lot. I discovered this while driving and it started surging and wouldn't go into gear as it warmed up. I'm hoping that it's because the level is high and not a worn band or something. It's also leaking around the pan. People say it will blow out the "vent." Where is this vent?
I've never seen an AW4 without a drain plug. Are you looking at the trans or transfer case bottom?
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Unread 01-15-2013, 10:41 AM   #9
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Pull the pan and add a plug if you don't have one. http://www.amazon.com/80250-Automati.../dp/B00029WR78
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Unread 01-15-2013, 03:06 PM   #10
aldersonfilm
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Hey, what'd ya know! I have a drain plug! Look at that... Whoops! Well it's draining now. Found out it's been overfilled for almost a full year!!! The previous owner over filled it too! Man, I hope I didn't destroy the tranny.
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Unread 01-15-2013, 03:29 PM   #11
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I don't think you have to worry about hurting the tranny, per se, with too much fluid. The peril is having tranny fluid overflowing, spewing, out of the fill tube, gooping up your underside OR pouring on your hot exhaust... and leaving a smoke screen down the road or worse yet catching on fire.

The total capacity for the tranny is ~8-9 qts. The majority of that is held inside your torque converter etc. A simple drain and fill is ~3.5 qts.
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Unread 01-15-2013, 09:21 PM   #12
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Quote:
Originally Posted by aldersonfilm View Post
Hey, what'd ya know! I have a drain plug! Look at that... Whoops! Well it's draining now. Found out it's been overfilled for almost a full year!!! The previous owner over filled it too! Man, I hope I didn't destroy the tranny.
I spent a whole day riding around trying to find a drain plug to add when I was doing the filter on mine. I felt like a fool when I dropped it and it had a factory drain.

Quote:
Originally Posted by Paradise XJ View Post
I don't think you have to worry about hurting the tranny, per se, with too much fluid. The peril is having tranny fluid overflowing, spewing, out of the fill tube, gooping up your underside OR pouring on your hot exhaust... and leaving a smoke screen down the road or worse yet catching on fire.

The total capacity for the tranny is ~8-9 qts. The majority of that is held inside your torque converter etc. A simple drain and fill is ~3.5 qts.
The problem with overfilling is froth, as I've read. Apparently when you have too much fluid, it winds up in places it shouldn't and gets whipped into a foamy mixture that doesn't work the same as unaerated liquid fluid will. I think this was an issue on 700R4s but may or may not be the case for our AW4s.
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Unread 01-16-2013, 04:38 AM   #13
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Drop th eplug and drain it. 3.8 quarts to refill. Always a good idea to replace the drain plug crush washer to prevent leakage.
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Originally Posted by chris87xj View Post
If you own a Renix Jeep, you'll want to check this out. >

An index to over 25 write-ups can be found in Post #1.

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My Jeep Technical Photos

http://www.cherokeeforum.com/g/album/1725214
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