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H3 Transmission pan drain plug

06 H3

a.k.a. "The Jackal"
Messages
9,506
Location
Meridian, ID
I'm going to drain the trans fluid but it's a big mess!! Every time I've done it in the past it's left a murder scene with the red fluid. I always said to myself I'll put in a drain plug next time...well each time I did it I never did but this time I am! Question is are those pans aluminum or metal? I'd like to install a weld in bung vs threaded but I don't have the spool gun to weld aluminum.

Who's done this before?
 

Mr_Rich

Well-Known Member
Messages
667
Location
Yucaipa & Santa Maria
attachment.php
This is a pic of a BTO 700R4 trans I installed in my K1500 three years ago. You can see the plug they install in the pan of this trans. It's really a matter of convenience. When it's time to drain the fluid a big jug with a funnel on top makes a fluid change almost painless. You still have a mess when you drop the pan but it's so much easier. I've since installed a PML deep aluminum pan on this trans and it solved some gasket and sealing issues I had with the stock pan.
 

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digglesworth

Well-Known Member
Messages
1,789
Location
illinois
Thought I did but can't find pics... It was like $5 at O'Reillys... It is the threaded one though.. I drilled the hole on the bottom of the pan in the driver's side rear corner of the pan. I can snap a pic after work today and text it to you if I remember.
 
S

SedonaBound

Guest
Nice little mod, but how often do you guys change your trans fluid?
 

JPaul

Well-Known Member
Messages
2,436
Location
Way up north, UT
Wouldn't another option be to use a fluid transfer pump to suction most of the fluid out before draining the pan? Just stick the suction tube down the fluid fill pipe in the engine bay and pump out the fluid.
 

digglesworth

Well-Known Member
Messages
1,789
Location
illinois
i scorched my fluid so i dropped the pan and the 4-5qts that came with it, added the drain plug and changed the filter. ran it for a day, drained the pan via the plug, topped it off, ran it for a day, drained, filled, etc... i did that for a few days to hopefully replenish most of the old fluid... i certainly didnt wanna remove all the pan bolts every single time i did that. now i can do a partial fluid change whenever i feel like it...
 
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