Manual Transmission Fluid - Nissan Forums : Nissan Forum
 
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#1 Old 06-03-2007, 09:20 PM
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Manual Transmission Fluid

Hello There!

Today I decided to replace my transmission fluid (manual), so I bought 5 qts of red line mt-90 (my previous fluid was lucas 75w90, GL-5).

So, I jack the car up, unbolt the drain bolt (at least I thought it was hehe), and let it drain).

Now, I think I removed the wrong bolt because:

1 - Only 3.5 qts came out, as I learned by refilling it.

2 - A small spring and a metal ball came out on the oil

Question:

Will my transmission die for mixing fluids? What is this small spring and ball supposed used for?
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#2 Old 06-03-2007, 10:06 PM
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Pictures to illustrate!

The hole I used to fill / drain:



The hole I think is the correct one (duh):



The spring/ball that came out:

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#3 Old 06-03-2007, 10:27 PM
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The spring and bearing look like a part to a check-valve. Specific pressure causes the bearing to compress the spring and let whatever fluid through.

1999 Firebird Formula Trans Am WS.9, M6, Blue-Green Chameleon
1987 GMC Jimmy, TBI350/TH350, 10b, 6" lift, 35" tires.
Neither quite stock.

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Originally Posted by Pulski
Cvl... this may never happen again, so take note of it. Thank you.
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#4 Old 06-03-2007, 10:52 PM
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So I just drain again using the correct plug, and then put like this:

Bolt --> Spring --> Ball --> Transmission

Is that simple? Will I risk dropping the ball or spring inside the transmission?
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#5 Old 06-04-2007, 12:37 AM
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Ok, I did put it back on this order, seems to be working fine. I'll do the highway test now
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#6 Old 06-04-2007, 12:53 AM
You'd lose.
 
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I'm honestly not sure where the bearing and spring would come from.

1999 Firebird Formula Trans Am WS.9, M6, Blue-Green Chameleon
1987 GMC Jimmy, TBI350/TH350, 10b, 6" lift, 35" tires.
Neither quite stock.

http://community.webshots.com/user/OutlawLS1

Quote:
Originally Posted by Pulski
Cvl... this may never happen again, so take note of it. Thank you.
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#7 Old 06-04-2007, 01:54 AM
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like you said earlier Cvl, its a check valve of some sort. not sure what its for either though.

why the straight 90?
you know its going to be harder to shift when the engine is cold now, right?

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#8 Old 06-04-2007, 02:44 AM
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I checked on the serv manual, this plug is used for the check of 3rd and 4th gears. I really noticed that 3rd and 4rth felt kinda loose without the ball and spring. Now I put it back, and it's feeling the same way as before.

Asleep, what you recommend? 1/2 of MTL and 1/2 of MT-90 for smoother shifts?

Thanks,
Carlos

PS: And the bolt on the 2nd picture is the correct one (to drain), right?
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#9 Old 06-04-2007, 04:35 AM
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green circle is the drain plug. it looks like it's a transmission bolt attached but it's not.
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#10 Old 06-04-2007, 05:33 AM
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cool, thanks
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#11 Old 06-04-2007, 08:47 PM
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Quote:
Originally Posted by Red Lion


green circle is the drain plug. it looks like it's a transmission bolt attached but it's not.
Yep , Yep ... You will need to get the ball and spring back in !!! or you will have shifting issues !! Ball first , then spring , then plug !!

SHAWN
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