D44 drain plug location
Thread Starter
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
D44 drain plug location
Before I install the 44 in my car, I'm adding a drain plug. The cover is off so obviously I'll be able to see exactly where I'll be drilling. It looks to me that just left of center, which is the lowest part of the housing and about 2" forward or so from the mating surface for the cover. I'm sure others have done this with the differential out and just wanted to get your thoughts and opinions. I don't want to weaken the structual integrity of the housing. Also thought that 1/4" pipe would be about right and I can't find a magnetic plug that small so I'll make my own. Thanks in advance for your input.
Drifting
Joined: Jul 2004
Posts: 1,352
Likes: 289
From: MA
Just did this to my Vette. Although my Rearend was in the car which made it more difficult to do. But at least you know where the plug should be to gain easy acces to it.
The plug is very close to the passenger side rear exhaust pipe.
Corvette Fever November 1998 on page 36 has the article on how to do this mod.
Drill a 1/4 inch hole to the left of the center cover bolt about 1/4 -1/2 inch away from the bolt. Then go to a larger 5/16 inch drill bit. ( by the way measure 3/4 inch from the front cover in before drilling.).
Then tap with 1/8 inch NPT tap. The article says to use an aluminum 1/8th inch tapered plug.
I could not find one, so I used a brass plug with teflon tape on the threads.
The plug is very close to the passenger side rear exhaust pipe.
Corvette Fever November 1998 on page 36 has the article on how to do this mod.
Drill a 1/4 inch hole to the left of the center cover bolt about 1/4 -1/2 inch away from the bolt. Then go to a larger 5/16 inch drill bit. ( by the way measure 3/4 inch from the front cover in before drilling.).
Then tap with 1/8 inch NPT tap. The article says to use an aluminum 1/8th inch tapered plug.
I could not find one, so I used a brass plug with teflon tape on the threads.
Thread Starter
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by grandspt
Just did this to my Vette. Although my Rearend was in the car which made it more difficult to do. But at least you know where the plug should be to gain easy acces to it.
The plug is very close to the passenger side rear exhaust pipe.
Corvette Fever November 1998 on page 36 has the article on how to do this mod.
Drill a 1/4 inch hole to the left of the center cover bolt about 1/4 -1/2 inch away from the bolt. Then go to a larger 5/16 inch drill bit. ( by the way measure 3/4 inch from the front cover in before drilling.).
Then tap with 1/8 inch NPT tap. The article says to use an aluminum 1/8th inch tapered plug.
I could not find one, so I used a brass plug with teflon tape on the threads.
The plug is very close to the passenger side rear exhaust pipe.
Corvette Fever November 1998 on page 36 has the article on how to do this mod.
Drill a 1/4 inch hole to the left of the center cover bolt about 1/4 -1/2 inch away from the bolt. Then go to a larger 5/16 inch drill bit. ( by the way measure 3/4 inch from the front cover in before drilling.).
Then tap with 1/8 inch NPT tap. The article says to use an aluminum 1/8th inch tapered plug.
I could not find one, so I used a brass plug with teflon tape on the threads.
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
Hi Chris'
This place sells a kit and has a template to show where to drill the hole and they give you the drill and plug and instructions.
www.corvetteclinicinc.com select C4 solutions.
This place sells a kit and has a template to show where to drill the hole and they give you the drill and plug and instructions.
www.corvetteclinicinc.com select C4 solutions.
Thread Starter
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by Strick
Hi Chris'
This place sells a kit and has a template to show where to drill the hole and they give you the drill and plug and instructions.
www.corvetteclinicinc.com select C4 solutions.
This place sells a kit and has a template to show where to drill the hole and they give you the drill and plug and instructions.
www.corvetteclinicinc.com select C4 solutions.
And for something I already have everything I need to do. We're not all independently wealthy, retired playboys like you! 
