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Tranny fluid and rearend fluid change.

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Old 07-14-07, 05:38 PM
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Tranny fluid and rearend fluid change.

I am changing the tranny fluid and the rearend fluid and was wondering what type i should use and how much i need. I have an 80 SA with a 5 speed.
Old 07-14-07, 06:20 PM
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I just changed my tranny fluid, and it used about 2 and 1/4 1 liter bottles. so about 2 and 1/4 liters. I used a semi synthetic SAE 75W90. I plan on doing the diff aswell, Im also curious as to how much it takes.
Old 07-14-07, 07:15 PM
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Fluid specs and quantities can be found in the FSM.
Old 07-14-07, 07:46 PM
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according to the FSM, It only takes 1.7L..I put in a little over 2. I just kept filling it untill it started to flow back out of the hole.
Old 07-14-07, 10:39 PM
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A note about the drain and fill PLUGS: these are tapered, so over-torquing will actually spread the thread-hole wider, so go easy on tightening
Stu Aull
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Old 07-14-07, 10:45 PM
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Royal Purple! 75w90 for the rear, and I dont remember what I used for the tranny.
Old 07-14-07, 11:43 PM
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i have redline MT90 in my trans and royal purple 75w90 in the rear.
Old 07-14-07, 11:48 PM
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Tip: Remove the FILL plug BEFORE the DRAIN plug. This applies to both the tranny and the rear end.

Yes, you read that correctly...

I tried to change the rear diff oil in my mother's truck. Drained it and couldn't get the damn fill plug out. The bolt was rusted in and rounded off... I had to remove the axle, turn it upside down, fill it through the drain, then put the axle back in. Turned a 30 minute job into a weekend job.
Old 08-20-08, 08:46 PM
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I bought my son his first car, 1987 Mazda RX7 non turbo. We just put the tranny back in after doing a new clutch job. My son left his manual at school and I am trying to fill the tranny back up with fluid.
My question is, I see the drain plug, then above that on the side the check plug. When I feel around for the fill plug (towards the top drivers side of the tranny), I feel two plugs. One right above the other, so, I tried a 14 mm open end wrench (someone said it was 14 mm I think) and as it turns out, feels like both are 14 MM.
I am unsure which is the fill plug. The two plugs are about 1/2" or so apart, very close to each other. The top one seems to be in a raised cast round area and the other (lower of the two) flush mounted.
I seem to have seen somewhere on the forums that someone said do not remove the recessed or countersunk , or something like that .. plug

So, which plug to I pull to fill the tranny

thanx
Old 08-20-08, 08:55 PM
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the check plug is the one you would use to fill it
Old 08-20-08, 09:25 PM
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Originally Posted by rokalias
My son left his manual at school .
Don't worry, you can download a manual from here:

http://rx7.foxed.ca
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