Need differential plug thread size
Thread Starter
Intermediate
Joined: Apr 2006
Posts: 45
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Need differential plug thread size
Does anyone out there know the thread size for the two plugs in the differential case (the drain and the fill plugs)? I think they're the same size, but I don't know for sure.
I took a look at a picture of the plugs next to a quarter (posted by another forum member) and it looks like a M18X1.5, but I need to be sure. If anyone knows, it would help me out a lot, in that I won't need to yank out the plugs just to measure them. I need to know the thread spec for a differential cooler that I'm working on.
Thanks in advance.
I took a look at a picture of the plugs next to a quarter (posted by another forum member) and it looks like a M18X1.5, but I need to be sure. If anyone knows, it would help me out a lot, in that I won't need to yank out the plugs just to measure them. I need to know the thread spec for a differential cooler that I'm working on.
Thanks in advance.
Melting Slicks
Joined: Sep 2004
Posts: 3,488
Likes: 27
From: Long Island NY
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
The diff has M20 x 1.5 threads. I needed to find a 1/8 npt adaptor to M20 x 1.5 for my diff temp gauge. I ended up buying a magnetic diff drain plug from Ecklers and drilling it out and tapping it.
Here's some more info on diff coolers. My diff runs hot - it can get close to 280 on track before I shut down. Wish the Z51 had a diff cooler like the Z06. My Z51 trans cooler works well, runs 200-220.
http://forums.corvetteforum.com/show...ial+temp+gauge
Here's some more info on diff coolers. My diff runs hot - it can get close to 280 on track before I shut down. Wish the Z51 had a diff cooler like the Z06. My Z51 trans cooler works well, runs 200-220.
http://forums.corvetteforum.com/show...ial+temp+gauge
Instructor
Joined: Jan 2011
Posts: 159
Likes: 28
From: Fort Myers FL
Need Plug Details / Specifics
Looking for a part number or detailed specs for the rear differential fill/drain plugs used on both the C5 and C6 vettes. Zip corvette sells them (see link below) but gives very little tech info (thread size, OEM pn, etc). I know it uses a 10mm hex.
My '05 has a stripped head on one (courtesy of the last repair shop) which I need to replace. I'd like to see if I can find one at a local auto parts store.
Any info would be appreciated. General web searches have proved of no help.
http://www.zip-corvette.com/ProductDetails/ProductDetails.aspx?pid={653c4373-1bcd-4ca6-b878-eea1c0d79e42}&gid={585d2a1e-1a41-4a55-a829-1f1e289a686b}&GroupName=C6+Differential+ Components&pname=97-13+Differential+Plug&Referer=&Alias=&ptc t=SGR-SR&CTitle=&
My '05 has a stripped head on one (courtesy of the last repair shop) which I need to replace. I'd like to see if I can find one at a local auto parts store.
Any info would be appreciated. General web searches have proved of no help.
http://www.zip-corvette.com/ProductDetails/ProductDetails.aspx?pid={653c4373-1bcd-4ca6-b878-eea1c0d79e42}&gid={585d2a1e-1a41-4a55-a829-1f1e289a686b}&GroupName=C6+Differential+ Components&pname=97-13+Differential+Plug&Referer=&Alias=&ptc t=SGR-SR&CTitle=&
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
Looking for a part number or detailed specs for the rear differential fill/drain plugs used on both the C5 and C6 vettes. Zip corvette sells them (see link below) but gives very little tech info (thread size, OEM pn, etc). I know it uses a 10mm hex.
My '05 has a stripped head on one (courtesy of the last repair shop) which I need to replace. I'd like to see if I can find one at a local auto parts store.
Any info would be appreciated. General web searches have proved of no help.
http://www.zip-corvette.com/ProductDetails/ProductDetails.aspx?pid={653c4373-1bcd-4ca6-b878-eea1c0d79e42}&gid={585d2a1e-1a41-4a55-a829-1f1e289a686b}&GroupName=C6+Differential+ Components&pname=97-13+Differential+Plug&Referer=&Alias=&ptc t=SGR-SR&CTitle=&
My '05 has a stripped head on one (courtesy of the last repair shop) which I need to replace. I'd like to see if I can find one at a local auto parts store.
Any info would be appreciated. General web searches have proved of no help.
http://www.zip-corvette.com/ProductDetails/ProductDetails.aspx?pid={653c4373-1bcd-4ca6-b878-eea1c0d79e42}&gid={585d2a1e-1a41-4a55-a829-1f1e289a686b}&GroupName=C6+Differential+ Components&pname=97-13+Differential+Plug&Referer=&Alias=&ptc t=SGR-SR&CTitle=&
Melting Slicks
Joined: Dec 2006
Posts: 2,694
Likes: 106
If you're going to put an OEM cooler, my GS dry-sump does not have a drain bolt. It's a special fitting where the oil cooler line goes in. You drain the oil by pulling a 'C' clip then pulling the line out. I'm almost sure the fill plug was larger than those posted, and it required a T-55 Torx socket, rather than being hex, like the pictured ones. Once you buy the plugs, put them thread vs thread and you'll know if it's the same pitch depending how they fit against each other. Good luck.
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Instructor
Joined: Jan 2011
Posts: 159
Likes: 28
From: Fort Myers FL
Thanks all.
Does anybody know a a good tool to remove this type of stripped screw?
I'd need something that works with very tight screws (as many know, this screw is very stubborn, even with a perfect hex feature). I'm tempted to just take it to a shop and let them deal with it but, at the same token, like doing things myself and don't like paying for something I could do myself.
Thoughts? Thanks again.
Does anybody know a a good tool to remove this type of stripped screw?
I'd need something that works with very tight screws (as many know, this screw is very stubborn, even with a perfect hex feature). I'm tempted to just take it to a shop and let them deal with it but, at the same token, like doing things myself and don't like paying for something I could do myself.
Thoughts? Thanks again.
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
Thanks all.
Does anybody know a a good tool to remove this type of stripped screw?
I'd need something that works with very tight screws (as many know, this screw is very stubborn, even with a perfect hex feature). I'm tempted to just take it to a shop and let them deal with it but, at the same token, like doing things myself and don't like paying for something I could do myself.
Thoughts? Thanks again.
Does anybody know a a good tool to remove this type of stripped screw?
I'd need something that works with very tight screws (as many know, this screw is very stubborn, even with a perfect hex feature). I'm tempted to just take it to a shop and let them deal with it but, at the same token, like doing things myself and don't like paying for something I could do myself.
Thoughts? Thanks again.
My suggestions are standard for removing stripped bolts. You might try a pair of good vice grips. Or, an easy out that fits would be another choice - don't drill the plug, just find an easy out that will get a bite in the existing plug. You could also try hammering in a allen that is a little too big. If you happen to have an impact screwdriver with replaceable tips, you could use the slightly too big allen tip - the hammer/twist combined action of the tool often gets the job done.
