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Author Topic: Front and Rear Differential Fill Plug Size  (Read 1231 times)

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Offline kevindpm61

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Front and Rear Differential Fill Plug Size
« on: January 29, 2016, 05:19:58 PM »
My son and I will be attempting to drain the old differential fluid with a suction pump and refilling afterwards. The car is not at my house and I was wondering if the fill plugs require Allen wrenches or some other tool? What size wrench is needed to remove the plugs?
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Offline mudkicker715

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Re: Front and Rear Differential Fill Plug Size
« Reply #1 on: January 29, 2016, 06:50:07 PM »
3/8 square. Iirc



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Offline vangremlin

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Re: Front and Rear Differential Fill Plug Size
« Reply #2 on: January 29, 2016, 10:03:38 PM »
On my 1980, the front differential requires a 5/8" wrench.  Good luck.
1981 Kammback 258 - "Pepe"
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Offline kevindpm61

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Re: Front and Rear Differential Fill Plug Size
« Reply #3 on: January 29, 2016, 11:09:15 PM »
Thanks for the answers gang.
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Offline carnuck

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Re: Front and Rear Differential Fill Plug Size
« Reply #4 on: February 05, 2016, 01:02:02 PM »
I plan to reseal the '80 front axle I have with new bearings (I hope) and install it already filled with synthetic oil. They didn't make a drain on the bottom and the fill is hidden behind the engine crossbar.
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Offline kevindpm61

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Re: Front and Rear Differential Fill Plug Size
« Reply #5 on: February 05, 2016, 08:06:51 PM »
I plan on removing the plug and using a pump to remove all the old fluids. I bought a hand unit at HF and I'm ready to give it a try.
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