Rubber differential fill plug

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Topic author
Triumph215
Posts: 215
Joined: Thu Jan 07, 2021 8:42 pm
Location: Monterey, Ca

Rubber differential fill plug

Post by Triumph215 »

Please - where can I get a replacement rubber plug for a 1977 rear differential?
I can't find one anywhere.
1964 Triumph TR4 with 1964 Olds 215 heart transplant
1977 Wagoneer
2009 BMW GS1200
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tgreese
Posts: 7117
Joined: Fri Jun 08, 2012 6:31 am
Location: Medford MA USA

Re: Rubber differential fill plug

Post by tgreese »

I don't know that the plug can be bought by itself. You could try Randy's Ring and Pinion.

You can buy a replacement cover with an actual threaded plug. https://www.bjsoffroad.com/Dana-44-Diff ... _p_76.html This is what I put on the rear of my CJ-6, and then put the CJ-6 cover with a threaded plug on my J10. I have a left-over cover from my J10 with a rubber plug, but I expect it's no better than the one you have now.

Randy's probably has a stamped steel thin steel type with a threaded plug.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 Chryco Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.
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Yeller
Posts: 1521
Joined: Thu Apr 01, 2021 7:54 am
Location: Rogers County Oklahoma

Re: Rubber differential fill plug

Post by Yeller »

I have an extra D44 cover with a threaded plug. Yours for shipping if you want it. Send me a pm
The bus I ride is so short it is a yellow Smart Car full of squirrels, monkeys and clowns.

1970 J2500 Resto Mod
https://www.fsjnetwork.com/forum/viewt ... 12&t=21395

1974 Bronco “Broncno”
https://classicbroncos.com/forums/threa ... st-3411909
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tgreese
Posts: 7117
Joined: Fri Jun 08, 2012 6:31 am
Location: Medford MA USA

Re: Rubber differential fill plug

Post by tgreese »

A mystery why you are having trouble. I searched and found lots of sources.
https://www.bing.com/search?q=spicer+51489
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS/PDB, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination A/Ts, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
Dual Everything: '15 Chryco Jeep Cherokee KL Trailhawk, ECO Green
Blockchain the vote.

Topic author
Triumph215
Posts: 215
Joined: Thu Jan 07, 2021 8:42 pm
Location: Monterey, Ca

Re: Rubber differential fill plug

Post by Triumph215 »

Those are too small, I already bought one of those. They fit the later model Wags. I got caught out in the middle of Oregon when it got bad, ended up wrapping the plug with electrical tape to make it bigger.
I checked the diff oil before I left on my trip to discover it was in bad shape. It hadn’t leaked a drop in 10 months previously. The plug hadn’t been off in so long it had glued itself the the cover.
1964 Triumph TR4 with 1964 Olds 215 heart transplant
1977 Wagoneer
2009 BMW GS1200

Topic author
Triumph215
Posts: 215
Joined: Thu Jan 07, 2021 8:42 pm
Location: Monterey, Ca

Re: Rubber differential fill plug

Post by Triumph215 »

Hi Yeller
PM sent. Thanks so much.
1964 Triumph TR4 with 1964 Olds 215 heart transplant
1977 Wagoneer
2009 BMW GS1200
User avatar

Yeller
Posts: 1521
Joined: Thu Apr 01, 2021 7:54 am
Location: Rogers County Oklahoma

Re: Rubber differential fill plug

Post by Yeller »

Triumph215 pm sent. We’ll work it out ;)
The bus I ride is so short it is a yellow Smart Car full of squirrels, monkeys and clowns.

1970 J2500 Resto Mod
https://www.fsjnetwork.com/forum/viewt ... 12&t=21395

1974 Bronco “Broncno”
https://classicbroncos.com/forums/threa ... st-3411909

Topic author
Triumph215
Posts: 215
Joined: Thu Jan 07, 2021 8:42 pm
Location: Monterey, Ca

Re: Rubber differential fill plug

Post by Triumph215 »

A Big Thank You to Yeller who was kind enough to gift me a D44 cover with a threaded plug in it so I can retire mine with the leaky rubber plug.
(I'm going to be so bored when I get all the leaks stopped). :)
1964 Triumph TR4 with 1964 Olds 215 heart transplant
1977 Wagoneer
2009 BMW GS1200
User avatar

Yeller
Posts: 1521
Joined: Thu Apr 01, 2021 7:54 am
Location: Rogers County Oklahoma

Re: Rubber differential fill plug

Post by Yeller »

Your Very Welcome! Always happy to share stuff I’m going to send to the scrap yard. :-bd

Would always rather it get used.
The bus I ride is so short it is a yellow Smart Car full of squirrels, monkeys and clowns.

1970 J2500 Resto Mod
https://www.fsjnetwork.com/forum/viewt ... 12&t=21395

1974 Bronco “Broncno”
https://classicbroncos.com/forums/threa ... st-3411909
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