2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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transmission oil?

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Old 06-26-08, 05:56 PM
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transmission oil?

so i just replaced my clutch, and drained the oil out of my 89 N/A 5 speed, then went to Advance Auto Parts and they said i had to check in the owner manual which i dont have, so if anyone could tell me what transmission oil i need to use that would help alot, having trouble finding it, thanks fellas!
Old 06-26-08, 06:34 PM
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API GL-5 gear lubricant
80W-90
Old 06-26-08, 06:45 PM
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NEO 90W is about the best you can buy. It'll clean up notchy shifting. Mazdatrix sells it.
Old 06-26-08, 07:36 PM
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I run MT 75w-90 Redline in mine. Jegs will get it to you in about 2 buisness days. I also work at Oreillys and we can look that up on the computer so im sure Advanced can. You should go back and tell them they are D-BAGS.
Old 06-26-08, 09:17 PM
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Some vehicles, especially uncommon ones, have nothing listed in the computer, they just say to check owner's manual...which is why they told him that, I'm sure.


+1 on the neo synthetic.
Old 06-26-08, 09:39 PM
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Well on ours it tells us for a rx7.... so idk. Just go to Oreillys next time lol
Old 06-27-08, 12:15 AM
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Originally Posted by blackedoutFC3S
so if anyone could tell me what transmission oil i need to use that would help alot, having trouble finding it, thanks fellas!
Nobody has given you the correct answer yet. I know correct answer because I read the service manual by using the links in the FAQ posted near the top of the 2Gen Specific forum.

PS: Since I read the scheduled maintenance part of the manual, I also know when to change the oil.

Originally Posted by RotaryRocket88
NEO 90W is about the best you can buy. It'll clean up notchy shifting. Mazdatrix sells it.
Any synthetic oil should clean up notchy shifting. I recommend synthetic oil for both the transmission and differential.
Old 06-27-08, 02:58 AM
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Originally Posted by siguy2k
I run MT 75w-90 Redline in mine. Jegs will get it to you in about 2 buisness days. I also work at Oreillys and we can look that up on the computer so im sure Advanced can. You should go back and tell them they are D-BAGS.
+1 on MT 90 from Jegs you can also use this for your differential. i used 4 1/2 quarts total.
Old 06-27-08, 08:53 AM
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Personally I love Royal Purple. I'm running it in the engine, trans and diff.
Old 06-28-08, 05:16 PM
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how is the royal purple holding up in the trans and diff? smoother shifts in the trans?
Old 06-28-08, 06:55 PM
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Its great I love it so far.
Old 06-28-08, 07:39 PM
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Redline MT90
Old 06-28-08, 07:40 PM
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ok so the transmissions all up, but i cant get the oil to drain into the transmission, we tried jacking the back of the car up to get it to run up but nothing, does any one know why? and i cant get the shifter in, i wanted to try and get it to go in just to see how but the oils there and i dont think that should affect if it goes in or not but i cant get it in... does anyone have any ideas?
Old 06-28-08, 08:28 PM
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Originally Posted by blackedoutFC3S
ok so the transmissions all up, but i cant get the oil to drain into the transmission, we tried jacking the back of the car up to get it to run up but nothing, does any one know why? and i cant get the shifter in, i wanted to try and get it to go in just to see how but the oils there and i dont think that should affect if it goes in or not but i cant get it in... does anyone have any ideas?
What does "all up" mean?

Are you filling the transmission through the fill hole on the side, or are you trying to fill it through the shifter?

Pictures would help.
Old 06-29-08, 09:28 AM
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Drain through bottom plug, fill through side plug.

Buy a length of plastic tube that can reach from the tranny to the engine bay. Get a funnel that fits snugly in this tube. Put the funneled end of the tube in the engine bay, then run the tube through the bottom of the engine bay and to the tranny. Hold the tube in the tranny while a buddy pours tranny oil into the funnel. Tell him to stop when it starts to overflow out of the tranny. Insert side plug. Rags will be helpful.

Neo is good stuff but Royal Purple Synchromax is also good and you're more likely to find it at your local auto store. Or you can order RP at www.racingbeat.com, Neo at www.mazdatrix.com. If you can't get either, then get GL-4 tranny oil NOT GL-5. GL-5 is a higher standard but it usually contains sulphur to meet the standard. Sulphur will cut the life of your synchros in half as it dissolves them. You could check for rotten egg smell, maybe you'd notice the sulphur that way. Not sure.
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