transmission
#1
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transmission
Ok so im pretty much on my third transmission. 1st tranny synchros were rebuilt around 40k miles 2nd and 3rd. Then that tranny went out 10k miles later it started doing the same, so mazda put a used tranny in my car to replace it. the tranny had about 48k miles on it when put in. As soon as i got the car back i could already feel grinding in 4th and 5th gears. Now i had a new motor and the tranny put in at the same time, so i just got the new motor broken in about a month ago and yesterday i decide to change the transmission fluid, and it was like black water. I add in the new redline oil, and now 4th gear grinds even worse than b4! Now anytime i shift it grinds to where it used to be just at higher rpms and now at high rpms i can barley get it into gear. Why would that be? its not low on oil i dont get it! So ill be taking my car in to mazda now and either they will rebuild this one or maybe finally put a brand new one in it.
#7
I <3 Sushi
iTrader: (21)
Yes, NS doesn't have any modifiers that your transmission need. That is the reason why it's grinding so much, I'm guessing that you're using 75w90NS (well, it's bad to use anything that has NS in it), that's a bad thing to do since it's lacking GL5 along with other modifiers.
It is HIGHLY recommended for you to change it out and use Redline MT-90 instead before you destroy your synchros and gears.
It is HIGHLY recommended for you to change it out and use Redline MT-90 instead before you destroy your synchros and gears.
#9
Out of NYC
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Yes, NS doesn't have any modifiers that your transmission need. That is the reason why it's grinding so much, I'm guessing that you're using 75w90NS (well, it's bad to use anything that has NS in it), that's a bad thing to do since it's lacking GL5 along with other modifiers.
It is HIGHLY recommended for you to change it out and use Redline MT-90 instead before you destroy your synchros and gears.
It is HIGHLY recommended for you to change it out and use Redline MT-90 instead before you destroy your synchros and gears.
the NS means its a GL-5 fluid but without the fiction modifier for LSD.
This GL-5-type geal oil doesn't contain the friction modifiers for limited-slip hypoid differentials. This makes the transmission synchronizers come to equal speeds more quickly, allowing faster shifting and much easier low-temperature shifting. Can also be used in racing limited-slip differentials where weak spring design causes too much wheel spin.
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No its not the clutch. its only 4th and 5th gear. other gears shift wonderfully. I havnt even been racing it sinc i just got a new motor put in and just broken it in! So i should switch it to mt90? or should i just go ahead and take it to the dealer? either way it seems the synchros are startin to go.
#15
Out of NYC
iTrader: (1)
...
MT-90 in tranny,
http://www.redlineoil.com/products_g...7&categoryID=7
For rear Diff, do NOT use 75w90ns. Use the regular 75w90.
http://www.redlineoil.com/products_g...5&categoryID=6
MT-90 in tranny,
http://www.redlineoil.com/products_g...7&categoryID=7
For rear Diff, do NOT use 75w90ns. Use the regular 75w90.
http://www.redlineoil.com/products_g...5&categoryID=6
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