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Old 08-07-2013, 02:07 PM   #31
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I'm sorry to rant about these trannys, but seriously, like anything else mechanical, failures do occur and longevity of operation is also in the equation - my point is this: when the equation becomes lopsided in the failure category... something is WRONG.
The failure rate for the Nissan 5 speed is fairly high from what I see. Particularly since I am in the part of the equation of one of the failure statitics.
I initially installed the Purple GL4/GL5 in my tranny.
After reading all of the BS about the possible problems this can cause, I bought the Redline GL4 and trashed $40 worth of Purple swill.
Now, I'm $85 into tranny juice!!!

Needless to say - I am TOTALLY unimpressed with Nissan's D21 5 speed.
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Old 08-07-2013, 08:16 PM   #32
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from what ive heard, as soon as GL5 gets in your trans the damage is done. as long as you use GL-4 always you shouldnt have trans issues

most old stickshifts need GL-4. Nissan, Toyota, Mazda, etc. its just when the sulfur compound of GL5 touches brass synchros thats it
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Old 08-07-2013, 10:11 PM   #33
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I unknowingly put GL5 in a FWD Nissan tranny before. It starting becoming harder and harder to shift winthin a few months. I switched it out to GL4, and within a few weeks it was shifting much better. I never rebuilt it or checked the synchros.

Was damage done? Maybe. It worked well enough after that I didn't concern myself about it.
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Old 08-11-2014, 03:37 PM   #34
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Have to add to this with another question, I've read alot where people say to remove the shifter and fill the tranny from the top, someone on NPORA asked about removing the whole shifter with the plate but no one answered him, they say it takes forever to fill the trans through the shifter hole, can I remove the whole shifter plate with the shifter and fill the tranny that way?

Looking to do this today want to make sure it's ok.

My boot is already cut out from the floor part so the shifter boot is easy to get out of the way.

I'll be using Amsoil GL4 oil same as I used in my 90 sentra manual trans (already have a quart and a half so just need to pick up another quart)


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Old 08-11-2014, 03:47 PM   #35
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We filled my dad's transmission through the shifter hole. I didn't think it took too long.
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Old 08-11-2014, 03:52 PM   #36
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would it be easier to pull the whole shifter/plate than pulling just the shifter?
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Old 08-11-2014, 05:28 PM   #37
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I just finished replacing the trans fluid, pulled the shifter out, the Amsoil seems so thin for a gear oil but I poured 2.5 quarts in, using a funnel in about 2 minutes, whole job start to finish was less than 15 minutes. It helped that my shifter boot isn't attached to the floor !
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