1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

what type of oil is best?

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Old 12-15-07, 08:08 PM
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what type of oil is best?

hey i wanna drain the oil out of the rear end and put some new stuff in and i was wondering wat type is the best to use? another this anyone have any opinions how to put the new Fluid in the rear end i know thers a top screw and bottom screw just want to know on how to get the fluid into the top screw?

o and another thing whats the best way to Refill the fluid from the tranny?? someone told me to unscrew the driveshaft and thats a way to put the tranny fluid in. its a 5 speed. thanks for the help
Old 12-15-07, 08:11 PM
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kind of a pain to fill both of them..

Involves taking those bottles with the tapered ends.. cutting off the tips and squeezing it in through a hose.

Unless you wanna rig up a little pump.. with compressed air or whatnot.. I believe thats the only way

*make sure the fill plug isn't seized before draining!*
Old 12-15-07, 08:14 PM
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Just buy a little hand pump at an autostore for a few bucks. Use any gear oil you want in 75-90,80-90, or 75-140.
Old 12-15-07, 08:21 PM
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A good trick is to open the fill plug BEFORE the drain plug. If you mess up getting the fill plug off, at least you'll still have fluid in the thing.

And as to how you fill it, just get a handpump from autozone/kragen/pepboys or wherever.
Old 12-15-07, 09:27 PM
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I put royal purple in both the tranny and the rear end
Old 12-15-07, 09:30 PM
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^ +1. Ditto.

Also, take the side drain plug off the tranny first to ensure nothing goes wrong. Then, work on the drain plug. Same for the diff. And, you can get a decent hand pump from any autoparts store for $10. Well worth the investment.
Old 12-15-07, 09:31 PM
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i put a whole bottle of lucas stabilizer and the rest Royal Purple 75w-90. it works awesome.
Old 12-15-07, 10:21 PM
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Some members have stated that they use the quart bottles with the tips you cut off then get a long piece of hose and put the one end in the trans. Then take the other end into the engine bay so that it is high enough for gravity feed and squeeze the bottle.
Old 12-15-07, 11:19 PM
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thanks for the info guys ill give it a shot sometime in a couple days.
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