transmission fluid drain?
- Night Crawler
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transmission fluid drain?
How do I drain some of the fluid out of my transmission? I need to add some supplement to the fluid to recondition the o ring to stop the late shifts that are happening.

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- grandprix104
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Re: transmission fluid drain?
use a hand pump or siphon tube in the filler tube. I would reccomend a pump. They are $5 at harbor freight $10 at checker/advance
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- harofreak00
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Re: transmission fluid drain?
siphon it out the dipstick, or loosen the bolts on the pan until you get out what you need (gonna be messy)
Last edited by harofreak00 on Sat Feb 07, 2009 1:25 pm, edited 1 time in total.
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2004 Bonneville GXP | 60k | White Gold Tricoat | custom built supercharged 3800 hot rod | garage queen
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- agrazela
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Re: transmission fluid drain?
Another vote for siphon from dipstick tube. Dropping the pan to remove a pint or so of fluid is way more trouble than is necessary.
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bonnevillain
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Re: transmission fluid drain?
i use a jack rabbit pump like this 
for draining my coolant, and trans fluid. works great.

for draining my coolant, and trans fluid. works great.
- Night Crawler
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Re: transmission fluid drain?
ok thanks

FWI, converted low beam bulbs into high beam bulbs, 20% tint all around, MSD wires, NDK TR55 plugs, auxiliary line in, scan gauge, custom FloPro/MagnaFlow Cat back exhaust
2002 Bonneville SE
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bonne03ssei
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Re: transmission fluid drain?
I'm adding a trans pan drain plug next time I change my filter/fluid. I forgot to add it when I changed the fluid after 600 miles after the rebuild. I bolted the pan up and added fluid before I remembered the plug I had. 

2003 Granite Metallic SSEi - 180,000 miles – All factory options
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- agrazela
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Re: transmission fluid drain?
I've considered that myself, but I fear a plug would be the lowest-hanging thing on the pan and could get sheared off if you ran over something.
Maybe if you tack-weld on some kind of "deflector shield" on front of the drain plug?
What I ultimately did was get a Motive Power fluid extractor (12 or 15 qt IIRC) and just suck ATF out the dipstick tube.
Maybe if you tack-weld on some kind of "deflector shield" on front of the drain plug?
What I ultimately did was get a Motive Power fluid extractor (12 or 15 qt IIRC) and just suck ATF out the dipstick tube.
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bonne03ssei
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Re: transmission fluid drain?
I suppose that is possible, though if it happened to someone they would have the worst luck ever, as the odds are slim that they hit it.
The bottom of the trans pan is higher that the subframe, which makes me feel better. However, though draining it through a plug is easy, sucking it out of the dipstick tube is even easier b/c you don't have to jack the car up. Definitely a good idea.

2003 Granite Metallic SSEi - 180,000 miles – All factory options
Essentials: rebuilt trans. w/ INTENSE shift kit | INTENSE FWI | INTENSE PCM | INTENSE drilled 180 t-stat | Aeroforce scan gauge
Goodyear Assurance TripleTreds | Energy Suspension endlinks
Exterior: cleared corners, cleared tails, red calipers, dual chrome exhaust tips
Interior: GXP steering wheel
- Night Crawler
- Posts like an L36

- Posts: 827
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- Year and Trim: 2002 Bonneville SE
- Location: Winnipeg, MB, Can (actually near Starbuck)
Re: transmission fluid drain?

FWI, converted low beam bulbs into high beam bulbs, 20% tint all around, MSD wires, NDK TR55 plugs, auxiliary line in, scan gauge, custom FloPro/MagnaFlow Cat back exhaust
2002 Bonneville SE


