There are, I thought you were joking.

Here: https://www.rx8club.com/series-i-tech-garage-22/clarification-manual-trans-differential-crush-washers-part-numbers-44584/ , better check and make sure you have not lost it (the fluids that is ....... already know you lost your mind )

j/k okay

 

The washers for the fill plugs are the same washers as the drain plugs. I bought 4 and used 4 and threw away 4 (two for the tranny; two for the rear)

 

Very weird since I had no fill plug washers on mine to begin with. I know I haven't lost any fluids, just checked to see if there was any leaking. I think I need to have a talk with my dealer now to see why there weren't washers there when there should have been when I took delivery.

 

No, not unless I'm torqueing down a head or doing bearing caps, etc. Do it up till it stops, then nip a bit.....

 

Just changed the trans and diff for Red Line yesterday and I can confirm that there are crush washers on all of the fill and drain. The fill on the diff is copper colored. If you order from Rosenthal you will get four crush washers that are the same inner and outer diameters and all are aluminum. The two thicker ones are for the trans.

As far as the torque wrench, I used 39lb/ft on all four. If I didn't use the torque wrench, I would have used much less torque. Just looking at the aluminum housings, I would have used a 3/8 drive 8" handle and tightened hard. I'm sure that 39lb/ft is a whole lot tighter than I would have taken it with the small handle.

 

Is nipping adding or subtracting?

I was taught to never subtract.

 

It means subtracting up here, but down there where the water drains backwards and they drive on the wrong side, it might mean adding :D .

 

Yeah, down here we nip things "up" . No torque wrenches, I like to live on the edge.....

Gomez.

 

were all of the fluids able to drain completely when the car was leveled? or do I need to lower the jacks a certain angle?

 

Getting your car level will insure the majority of the fluids drain. You don't want to be playing with inches up/down while your car is on jack stands.

 

The differential and tranny will drain just fine if the car is level. Make sure you replace the drain plug washers-gaskets.

However, If you want to drain a few more ounces out of the engine oil pan, raise the drivers side of the car while the drain plug is out. You will definitely drain a total of nearly 5 qts using that approach.

 

hey thanks guys! Just gonna get going on this next weekend!

 

I too just got my tranny and rear diff changed to Redline. I love it!! Definitely smooth as silk now:D

 

So I take it changing these to Red Line is a plus? I just got the car and have just about 520 miles on it already. Should I wait to change out these fluids or should I go get it done immediately?

 

There are lots of synthetic gear oils that could be used in our trans / differentials. I went with 80/90 Amsoil in both places and everything works fine. Should last a good long while and diffently helps up here in northern Minnesota with the first few miles in the winters.

Great,

Jeff B.

 

If your gonna spend the money for Redline, use the Royal Purple instead. 75W90 for the trans and Diff.

 

Just had Amsoil 75/90 HD put in both diff and tranny..Seems to be smoother and did notice when shifting from 3rd to 2nd not as smooth,but when driven hard consistantly it fades..Also noticed in owners manual that 75/90 is for tranny and mt/90 is for rear diff.. I was worried but found imformation thanks to Mazda Tech service manual calling for 75/90 in both (gl 4-5 ).Also on this forum different advice is given, 75/90 rear diff and mt 90 for tranny... Who's right?????.. I am relieved to see that someone else is using 75/90 or 80/90 in both... Can anyone tell me the diff???

 

Thanks SHAG1

 

No, they aren't. They are the same diameter and thickness. End of story.

Bill

 

I used a blend of Red Line MTL (70W80) and MT-90 (75W90) in the transmission as suggested on some of the RX-7 boards and like it. Shifting is nice and light with no grinding.

 

This forum is right: 75/90 differential, and MT-90 for the tranny, if you are using Red Line. Not sure about the other brands.

As far as which brand to use (Red Line, Royal Purple, or Amsoil), it's safe to say that all 3 are extremely good synthetic oils. Use whichever you prefer. If someone tells you (of the 3 listed) that one is significantly superior to the others, they are full of it. Any of the 3 are good, and any of the 3 are way better than a dino oil (in this application).

Bill

 

Au contraire. The fill plug gasket and drain plug gaskets for the tranny are, indeed, the same as each other. However, the fill plug gasket and the drain plug gasket for the differential are different from each other and different from those for the tranny. See the parts manual pages below.

 

After all this argument I'll just tell you that I have changed trans/diff fluids twice and have re-used the washers you all are discussing. I also used a 15/16" box end wrench on all of the plugs and everything works fine with no leaks. The key is to torque until contact and tweak a bit more until you feel the plugs "dig in" on the washers. Same with my oil pan plug.

CRH

 

Au contraire contraire. On my car, they are identical. I ordered 4 washers (from Rosenthal, I think) for each the tranny and the differential. They sent me 8 of the same washer. I thought they made a mistake and sent me the wrong washers for one of them, but after pulling the existing washers off and doing a comparison, they are the same. Just relating my personal experience, and I did this about a month ago, so my memory is still relatively fresh (for an old man, anyway). Perhaps there is a difference between the '04's and '05's?

 

The washers on the trans and diff are the same size, but I do believe that the diff washer was a little bit thicker. Anyways, this is somewhat of a pointless arguement because both washers will work fine.