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  #1  
Old May 17th, 2018, 20:30
Black1990jeep Black1990jeep is offline
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Adding a Drain Plug, Currie 9 in. Rear End

Id like to add a drain plug to my Currie 9 inch rear end. It has an Eaton TruTrac. I have no idea how it looks internally, the thickness of the case, where the lowest location is internally, nor how much clearance I have inside for a pipe tap to run up thru a hole I drill.

Would someone please provide how they have done this, or photographs on the inside so I can plan where to add the drain plug hole?

Thanks
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  #2  
Old May 18th, 2018, 00:12
RCP Phx RCP Phx is offline
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Re: Adding a Drain Plug, Currie 9 in. Rear End

You will know where to drill when you pull the 3rd member. You may need to add a bung to make up for thickness.
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  #3  
Old May 18th, 2018, 06:30
VAhasnoWAVES VAhasnoWAVES is offline
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Re: Adding a Drain Plug, Currie 9 in. Rear End

youll need to pull the third out to clean the housing after drilling/tapping/welding (what ever method you chose). aside from the ring gear, youll have plenty of room to play. i added a giant fill/inspection to my 9 as well.
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Old May 23rd, 2018, 13:24
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XJEEPER XJEEPER is offline
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Re: Adding a Drain Plug, Currie 9 in. Rear End

Quote:
Originally Posted by Black1990jeep View Post
Id like to add a drain plug to my Currie 9 inch rear end. It has an Eaton TruTrac. I have no idea how it looks internally, the thickness of the case, where the lowest location is internally, nor how much clearance I have inside for a pipe tap to run up thru a hole I drill.

Would someone please provide how they have done this, or photographs on the inside so I can plan where to add the drain plug hole?

Thanks
2 minute Google search.......

Filler
https://ljrc1.com/item/1219552-175-a...-on?brand=9232

Drain plug location
http://www.jimmeyerracing.com/images...assis_019b.jpg

Drain plug
http://www.chassisunlimited.com/prod...rain-plug.html
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  #5  
Old May 23rd, 2018, 15:32
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techno1154 techno1154 is online now
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Re: Adding a Drain Plug, Currie 9 in. Rear End

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Originally Posted by XJEEPER View Post
The second drain plug option is the better option. I bought some from this company "www.bungking.com/steel-npt-bungs/"] www.bungking.com/steel-npt-bungs[/B]/ but am yet to use them.
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1996 XJ; 4.0L; AW4; NP231; SYE; D30 and D44; ECTED; 4.10 gears; 30X9.5 -15 BFG/AT/KO; 3" lift; Rusty's LCA; JKS ADJ UCA; Kevins ADJ Track bar; Drawtite Front Receiver; Dual Electric Fans; Dual Battaries.
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Old May 23rd, 2018, 17:58
RCP Phx RCP Phx is offline
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Re: Adding a Drain Plug, Currie 9 in. Rear End

I prefer a flush plug installation, but it's hard to accomplish! I recommend a 1/8-27 NPT for the most contact and zero exposed material!
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Old May 24th, 2018, 07:35
VAhasnoWAVES VAhasnoWAVES is offline
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Re: Adding a Drain Plug, Currie 9 in. Rear End

1/8"? thats annoyingly small. my narrowed/shaved 9 took almost 5 quarts of gear oil. would have taken hours for it to drain through a 1/8" plug.

the better option for a drain plug is to shave it while you are in there... gain some ground clearance and give yourself a nice thick piece of metal to weld the bung to. mount it flush or sub flush. no photos of the plug, but it was 1/2" i think... big enough to get a weld on if you managed to beat it up and couldnt get an allen on it anymore. basically... miss the ring gear and youve got miles of room.





same goes for a fill/inspection plug:

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Old May 24th, 2018, 07:39
VAhasnoWAVES VAhasnoWAVES is offline
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Re: Adding a Drain Plug, Currie 9 in. Rear End

side note.

just reread that your 9 is a currie unit... though that doesnt specifically imply that its a fab 9 housing. you have plenty of options either way.
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Old May 24th, 2018, 10:01
RCP Phx RCP Phx is offline
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Re: Adding a Drain Plug, Currie 9 in. Rear End

Quote:
Originally Posted by VAhasnoWAVES View Post
1/8"? thats annoyingly small. my narrowed/shaved 9 took almost 5 quarts of gear oil. would have taken hours for it to drain through a 1/8" plug.
1/8" NPT is about 3/8" in diameter!
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  #10  
Old May 24th, 2018, 15:49
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Re: Adding a Drain Plug, Currie 9 in. Rear End

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Originally Posted by RCP Phx View Post
I prefer a flush plug installation, but it's hard to accomplish! I recommend a 1/8-27 NPT for the most contact and zero exposed material!
That is easy to accomplish by drilling and tapping the housing and using an Allen head plug. Test fitting and tapping until the plug go in as far you wish assuming the housing material is 1/4" or thicker.

To protect the plug from being mangled, a piece of metal could be welded around the plug thick enough to extend below the plug. Look at the Toyota and Mitsubishi differential drain plugs for an example.
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1996 XJ; 4.0L; AW4; NP231; SYE; D30 and D44; ECTED; 4.10 gears; 30X9.5 -15 BFG/AT/KO; 3" lift; Rusty's LCA; JKS ADJ UCA; Kevins ADJ Track bar; Drawtite Front Receiver; Dual Electric Fans; Dual Battaries.
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