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Changing the Differential / Transmission Oil

Old 08-03-2006, 10:48 AM
  #61  
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Originally Posted by desiZ
Just got my batch of mt-90 today, $40 shipped from Summit Racing...

Are you just doing the tranny?

What redline product do you use for the diff?
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Old 08-03-2006, 10:59 AM
  #62  
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Originally Posted by Wired 24/7
Are you just doing the tranny?

What redline product do you use for the diff?
yup only tranny, part of my DIY 30k maintenance... i have a base so no differential ...

you will need a GL-5 spec for Diff... im sure redline carries one... just dont know which and didnt bother researching cause i aint gonna need it
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Old 08-03-2006, 11:14 AM
  #63  
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Originally Posted by desiZ
yup only tranny, part of my DIY 30k maintenance... i have a base so no differential ...

you will need a GL-5 spec for Diff... im sure redline carries one... just dont know which and didnt bother researching cause i aint gonna need it
I think I'm going to go with AMSOIL for the diff, I'd rather put in the service manual recommended viscosity of 80w-90 instead of getting the 75w-90 redline stuff.

I'm too newb with cars to start experimenting
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Old 08-03-2006, 11:28 AM
  #64  
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Originally Posted by Wired 24/7
I think I'm going to go with AMSOIL for the diff, I'd rather put in the service manual recommended viscosity of 80w-90 instead of getting the 75w-90 redline stuff.

I'm too newb with cars to start experimenting
yes for the diff I would use 80w-90 too ... but mt-90 apparently has amazing results for transmission... and 75w-85 is recommended for tranny...
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Old 08-03-2006, 11:35 AM
  #65  
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Originally Posted by desiZ
yes for the diff I would use 80w-90 too ... but mt-90 apparently has amazing results for transmission... and 75w-85 is recommended for tranny...
I'll check it out thanks... haven't ordered anything yet.

I'm doing all this at 14 months / 10k miles



I don't know if it's necessary, but I feel like my tranny is getting worse, more notchy, etc. While I'm at it, might as well do the diff.

I'm still too scared to put synthetic in my engine, so I think I'll just do the typical pennzoil or whatever dyno oil 5W-30.
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Old 08-05-2006, 08:28 PM
  #66  
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Originally Posted by Monsta
Changing Diff/Trans Fluid.
hey Monsta... just wanted to say thanks for the write-up, did the following today:-
1. changed diff/trans oil (small note: takes 3.25 qts. max)
2. drained/refilled coolant
3. oil+filter change
4. new air filter (K&n)

went like a breeze... only I didnt change the washer on the drain plug since it looked as good as the new one i had ... however the oil pan crush washer was toast...
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Old 08-06-2006, 05:58 PM
  #67  
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Originally Posted by desiZ
yup only tranny, part of my DIY 30k maintenance... i have a base so no differential ...

you will need a GL-5 spec for Diff... im sure redline carries one... just dont know which and didnt bother researching cause i aint gonna need it
You have a differential, just not the viscous one...
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Old 08-07-2006, 09:26 AM
  #68  
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Originally Posted by mberthia
You have a differential, just not the viscous one...
yes i know that, what I meant was I dont have LSD...

followup: I've noticed the difference in switching from 1st to 2nd... used to get slight grinding on occasion.... much smoother now...
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Old 08-07-2006, 11:39 AM
  #69  
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Cool

Thank you! That is a great write-up.

Someone asked about how often the differential oil needed to be changed.

I asked my dealer that same question and he told me that it was good up to 105,000 miles!

That seems very hard to believe. I think every 30,000 miles sounds about right. The owners manual is quite generic and covers all Nissan vehicles. I noted that only the 350Z seemed to require unusually (to me) frequent checking of the rear diff oil.

Any reason for that? What do you guys think?

Also, is the end of the drain plug magnetized to catch metal filings?

Thanks,
Joe
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Old 08-07-2006, 12:05 PM
  #70  
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There is a magnet on the diff drain plug but not on the transmission drain plug.
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Old 08-08-2006, 02:25 PM
  #71  
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Important question: does the diff / MT have the same drain plug washer as the oil drain plug washer?

Thanks guys.
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Old 08-08-2006, 02:29 PM
  #72  
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Originally Posted by Wired 24/7
Important question: does the diff / MT have the same drain plug washer as the oil drain plug washer?

Thanks guys.
excellent question... answer is NO

oil drain plug uses crush washers .. little bronze penny-sized washers

mt / tranny uses o-rings... kinda like a quarter-sized o-ring...

i had no idea initially though, i specifically told rene at performance i needed the transmission plug washer and he gave me 2 oil plug washers... sigh... next time i'll make sure either andy or jason is there...
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Old 08-08-2006, 02:37 PM
  #73  
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Originally Posted by desiZ
excellent question... answer is NO

oil drain plug uses crush washers .. little bronze penny-sized washers

mt / tranny uses o-rings... kinda like a quarter-sized o-ring...

i had no idea initially though, i specifically told rene at performance i needed the transmission plug washer and he gave me 2 oil plug washers... sigh... next time i'll make sure either andy or jason is there...
Thanks for the heads up!! That would suck ***** to open up the plug and be like
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Old 08-08-2006, 02:40 PM
  #74  
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Originally Posted by desiZ
excellent question... answer is NO

oil drain plug uses crush washers .. little bronze penny-sized washers

mt / tranny uses o-rings... kinda like a quarter-sized o-ring...

i had no idea initially though, i specifically told rene at performance i needed the transmission plug washer and he gave me 2 oil plug washers... sigh... next time i'll make sure either andy or jason is there...
Wait, is the MT and the diff a metal o ring or rubber? (i already have the oil drain plug copper washers)
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Old 08-08-2006, 03:36 PM
  #75  
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Diff and MT are metal washers. You probably don't need to replace them. I had purchased them and ended up reusing the old ones. Maybe next time I'll change them
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Old 08-08-2006, 03:44 PM
  #76  
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Originally Posted by mberthia
Diff and MT are metal washers. You probably don't need to replace them. I had purchased them and ended up reusing the old ones. Maybe next time I'll change them
i didnt replace em either... the drain plug washer for the tran had a few black spots so i swapped it with the fill plug washer which was as good as new...

at 60k, i will have new o-rings...

wired: its a metal o-ring... u can probably get it at homedepot its so generic...lol
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Old 08-08-2006, 03:47 PM
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Originally Posted by mberthia
There is a magnet on the diff drain plug but not on the transmission drain plug.
i realized that when I pulled the plug out... initially after looking at the pic with the filings on it I was like WTF where's that piece??? then i assumed he took a pic of the diff plug & not the tranny plug...
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Old 08-14-2006, 12:39 PM
  #78  
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OK Guys, just ordered some transmission/diff drain plug washers.

If anyone wants the part number, it's

110264n200

you can find it at perf. nissan's OEM parts site

http://www.trademotion.com/partlocat...?siteid=214252

just plug it into the search function on their site

They're like $2 each... cheap insurance...


Also I bought the redline mt-90 stuff for the trans (GL-4), as well as redline 75w-90 gear oil for the diff (exceeds GL-5)

Last edited by Wired 24/7; 08-14-2006 at 12:43 PM.
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Old 08-14-2006, 06:36 PM
  #79  
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Good find Wired 24/7. I was getting ready to start digging around for that p/n, you saved me the work. Odds are I could just reuse the originals, but with my luck if I don't have replacements on hand, I'll need 'em when I do the job.
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Old 08-16-2006, 01:25 PM
  #80  
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The diff in an auto takes the same oil yes? I know Nissan is super picky about what transmission fluid is put in the car.
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