Transmissions and Drivetrain Need help with your trans? Problems with your axle?

I need a 9 bolt oil diff plug

Old 04-15-2019, 11:19 AM
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I need a 9 bolt oil diff plug

I need a rear axel diff plug rubber vent plug
Gm says it's disc here
What do you guys do for a new 1
Let me know
Ty
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Old 04-15-2019, 01:03 PM
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Re: I need a 9 bolt oil diff plug

I bought a NOS one recently. Found it at some dealer out west through partsvoice.
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Old 04-15-2019, 01:07 PM
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Re: I need a 9 bolt oil diff plug

I can't find one anywhere
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Old 04-15-2019, 03:15 PM
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Re: I need a 9 bolt oil diff plug

Try one for the Dodge truck rear end. Some Jeeps use a plug like that too.
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Old 04-15-2019, 06:25 PM
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Re: I need a 9 bolt oil diff plug

Could this be it? (no pic in ad listing)
https://www.drivetrainspecialists.co...over-plug.html

GM #10033568
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Old 04-15-2019, 07:08 PM
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Re: I need a 9 bolt oil diff plug

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Old 04-15-2019, 08:04 PM
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Re: I need a 9 bolt oil diff plug

I scored one on Ebay a couple years back, was 25 freaking bones for cheesy rubber plug lol.

Good luck!
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Old 04-15-2019, 08:42 PM
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Re: I need a 9 bolt oil diff plug

Originally Posted by sonjaab View Post
Could this be it? (no pic in ad listing)
https://www.drivetrainspecialists.co...over-plug.html

GM #10033568
Yes, your GM number is correct.


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Old 04-16-2019, 10:52 AM
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Re: I need a 9 bolt oil diff plug

Just get the TA aluminum rear cover. Problem solved.

GD
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Old 04-16-2019, 11:27 AM
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Re: I need a 9 bolt oil diff plug

I do see a new cover on a few of those sites with a screw in plug are less than $30 bucks and chrome too!
I got my plug a few years back in the Dorman/HELP section of the parts store a few years back for less than $5 bucks.
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Old 04-16-2019, 04:45 PM
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Re: I need a 9 bolt oil diff plug

I have a 9 bolt rear end
I measured my hole it's. 80 "
Not 1.3
I stood in Napa today for 1 hour found nothing
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Old 04-16-2019, 04:46 PM
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Re: I need a 9 bolt oil diff plug

I live in Canada
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Old 04-16-2019, 06:16 PM
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Re: I need a 9 bolt oil diff plug

http://9bolt.com/ might be able to help you.
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Old 04-17-2019, 02:42 AM
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Re: I need a 9 bolt oil diff plug

A quick search on partsvoice showed that Craig Motors in Napa, CA has one in stock. Call them at 800-224-8111 and see if they'll ship it to Canada. Hurry up, because I might buy it if you don't.
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Old 04-17-2019, 03:05 PM
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Re: I need a 9 bolt oil diff plug

I welded a large nut onto my cover, maybe 3/4". Worked great. Made checking and adding oil a cinch. If you can't weld just take it to a welding shop or call a side welder from one of the Craigslist ads. I would think the bolt and weld would run you $20.
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Old 04-17-2019, 03:19 PM
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Re: I need a 9 bolt oil diff plug

Amazon Amazon


Actually, I'd measure the hole, then jump on the Google, and do a search for something like "Rubber Cap Plugs" and fish through the results until you find someplace that carries a plug that looks about right, and says it'll fit a hole that size. You might have to order 10 or 25 to get something really close, but I'll bet you can find something close enough. If you want to be belt plus suspenders kinda guy, stick with auto parts suppliers or make sure that whatever plug you find is "Oil tolerant" "Oil resistant" and rated for outdoor exposure.

.80" works out to somewhere between 3/4" (.75") and 13/16" (.8125). So maybe try something like "Rubber oil drain hole plug 13/16 inch" for your search string.

Because here's the thing... Borg Warner or GM, whoever in the business of building axle assemblies and cars, didn't go out and buy a rubber plantation in South America and build a processing plant to manufacture differential cover plugs. They went to a distributor and bought X qty of rubber hole plugs. You can do the same, you just have to work within the limits of what's available. GM is out, that distributor probably still makes the exact same thing or something similar to plug holes in piggy banks or mouthy ex wives...
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Old 04-18-2019, 10:07 PM
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Re: I need a 9 bolt oil diff plug

I'm just gonna have to welds bung
I ordered a new 9 boktgasjet here Tuesday
A d then I'll take it off and weld a bung
Is it ok to seal it up
Does it need a rubber plug to vent extra pressure hot cold stuff
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Old 04-19-2019, 12:54 AM
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Re: I need a 9 bolt oil diff plug

Nah, there should be a vent elsewhere in the diff for venting. Not sure where it is on a 9-bolt, but on the 10-bolt...



On the Ferrrd 8.8 is on the top of the right side axel tube...



Haven't got a 9-bolt handy but it's surely got one.

The rubber plug is just fast and dirty, fill, plug, pull plug, check level, push plug back in.
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Old 04-19-2019, 01:03 AM
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Re: I need a 9 bolt oil diff plug

I have the TA Aluminum rear cover and it has regular screw in plugs. No cover venting required. It's a nice piece with carrier bearing supports.

GD
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Old 04-19-2019, 12:42 PM
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Car: 1988 GTA Trans am 1 owner since new
Engine: 383 built
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Axle/Gears: 3.24 posi 9 bolt
Re: I need a 9 bolt oil diff plug

Ok th great
I'll do the welding bung
Ty
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Old 04-20-2019, 07:13 PM
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Re: I need a 9 bolt oil diff plug

I'd suggest just tapping it to pipe thread. " NPT if memory serves. Then use a brass plug with Teflon tape.
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Old 04-22-2019, 05:50 PM
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Re: I need a 9 bolt oil diff plug

Originally Posted by Drew View Post
Nah, there should be a vent elsewhere in the diff for venting. Not sure where it is on a 9-bolt, but on the 10-bolt...



On the Ferrrd 8.8 is on the top of the right side axel tube...



Haven't got a 9-bolt handy but it's surely got one.

The rubber plug is just fast and dirty, fill, plug, pull plug, check level, push plug back in.
Not so easy. Last time I tried to extract the plug it ripped in half. This was back when you could just go to the dealer and get a new one. I just drained and refilled my 9 bolt yesterday. Pop off the cover and push the plug out from the inside to avoid damaging the thing. New 9 bolt gasket from rockauto.
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Old 04-22-2019, 05:54 PM
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Re: I need a 9 bolt oil diff plug

Originally Posted by big gear head View Post
I don't think this will fit. the neck on the GM plug is longer.
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