Differential drain plug
02-05-2002, 07:44 AM
#1
Tech Contributor
Thread Starter
Differential drain plug
I have my differential apart and was wondering if anyone drilled and tapped a plug for it? I did this on my Muncie 20 years ago and tapped it for a 1/8" pipe plug. I have an old article from the 70's on retrofitting a 12 bolt into a vette housing and they said to tap 1" from the spring pad. I not sure that it's necessary for a street car or not. Any comments?
Gary
Gary
02-05-2002, 07:59 AM
#2
Safety Car
Re: Differential drain plug (gtr1999)
When I swaped in my new gears I added a drain plug to my diff housing. I drilled a 3/8 diameter hole in the housing 4" behind the pinion seal. Tapped it and fitted it with brass plug. I used teflon tape to seal the threads. It made for a quick drain when I needed to change the gear oil after R/P break in.
02-05-2002, 08:41 AM
#3
Race Director
Member Since: Nov 2000
Location: Waterloo ontario Canada
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Re: Differential drain plug (gtr1999)
I drilled and tapped my cover plate with 1/4 npt just in front of the spring mounting pad. The spring does block this location but I usually pull my spring every winter so for me it is no big deal.
02-05-2002, 10:18 AM
#4
Melting Slicks
Re: Differential drain plug (gtr1999)
I think this is a good idea and the factory should have done it. Especially since the cover is not easily loosened to drain the oil on our cars.
02-05-2002, 05:58 PM
#5
Instructor
Member Since: Jul 2001
Location: Berkeley Heights New Jersey
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Re: Differential drain plug (KenSny)
I recently used the turkey baster method. Took about 1 1/4 hrs just to get the black gook out and a torn miniscus. Been in pain ever since and am considering surgery.
02-05-2002, 06:59 PM
#6
Race Director
Re: Differential drain plug (bl75vette)
bl75vette, for about $9, you can get one of those lube pumps for boat lower units and put a 3/8" flexible rubber hoses on it with the end slash cut and you'll get 95% for the rear end fluid out in about 4 minutes. Best little pump I've ever owned-use it for both the boat and the Corvettes!!! :yesnod:
