79 Diff fluid
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Joined: May 2003
Posts: 50
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From: McKinney TX
79 Diff fluid
Ok I would like to replace the diff fluid in my 1979. How much of a pain is this? So far I have the half shafts out and the spare tire carrier. Look to me like the spring has come come out. I would also like to drop the fuel tank while I have the space open. Is this also a pain?
Drifting
Joined: Mar 2001
Posts: 1,411
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From: St. Louis, Missouri
I simply removed the spare tire carrier and siphoned as much as the old, nasty stuff as I could with a hand pump through the side fill plug. Capacity is something crazy like “1/2 inch below overflowing”. I just filled mine to overflowing and it’s been fine for three years. Don’t forget the posi additive.
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Joined: May 2003
Posts: 50
Likes: 1
From: McKinney TX
The start of this project was to replace the gasket on the diff. Its actually leaking a little bit. As for dropping the tank I would like to do it just to clean it out and put a new sending unit in it. The sending unit is working but I have most of the stuff out of the rear of the car right now so why not do it while is available I guess is what I am thinking.
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Joined: May 2003
Posts: 50
Likes: 1
From: McKinney TX
It actually wasn't that bad. I just removed the two bolts from the crossmember and all the diff cover bolts and it all came off just fine. OHHH and I put a jack stand under the diff so it wouldn't lay on my exhaust. Cover is off and the gears look great. Not bad for 25 years old. I was very low on fluid though. Now to get is all back on there 
