Trans/Diff Oil?
09-18-04, 09:35 AM
#1
Junior Member
Thread Starter
Join Date: Sep 2004
Location: Canada
Posts: 11
Likes: 0
Received 0 Likes
on
0 Posts
Trans/Diff Oil?
Hi Guys. I’ve used the search function, but I’m after the final decision. What transmission and differential oils do you recommend for my 1993 RX7? I’m after smooth shifting and long trans/diff life. I just took my RX7 to the dealer for all the recalls and I asked to have the trans and diff oils changed. For the diff they used a 80W-90 gear oil (GL-8945) and a limited slip additive (992694). For the trans they used automatic transmission fluid (DEX1139 ATF-DII). Will this ATF harm my transmission? My owner’s manual recommends “API Service GL-4 or GL-5 (SAE 75W-90)” for the transmission and “API Service GL-4 or GL-5 (SAE 90W)” for the differential. Should I use a mineral oil, like Castrol, or a synthetic oil like Red Line or Royal Purple? Thanks.
09-18-04, 02:42 PM
#2
Couple of questions:
1. Do you have a manual or auto FD? If it's a manual and they put ATF in, find another shop. The manual is right.
2. You searched? I can't believe you couldn't find any threads dealing with the exact questions your asking.
fwiw, On manual FDs, I think most here use synthetics... NEO, Royal Purple and Redline are common. Personally I'm using Redline MT90 for the transmission, 75W90 in the diff.
1. Do you have a manual or auto FD? If it's a manual and they put ATF in, find another shop. The manual is right.
2. You searched? I can't believe you couldn't find any threads dealing with the exact questions your asking.
fwiw, On manual FDs, I think most here use synthetics... NEO, Royal Purple and Redline are common. Personally I'm using Redline MT90 for the transmission, 75W90 in the diff.
09-18-04, 04:49 PM
#3
Junior Member
Thread Starter
Join Date: Sep 2004
Location: Canada
Posts: 11
Likes: 0
Received 0 Likes
on
0 Posts
I was a little surprised that they put ATF fluid in my manual transmission. What are your opinions on Amsoil gear oil? I’ll try the search function again.
09-18-04, 06:19 PM
#5
https://www.rx7club.com/showthread.p...smission+fluid
https://www.rx7club.com/showthread.p...smission+fluid
https://www.rx7club.com/showthread.p...smission+fluid
https://www.rx7club.com/showthread.p...smission+fluid
https://www.rx7club.com/showthread.p...smission+fluid
Amoil is probably just fine as long as it's the right viscosity/weight. ^These are just a few of the latest threads I found using "transmission fluid" under a 3rd gen. section search.
I wouldn't drive my car very much until the ATF is drained and proper fluid is put in. If that's a MAZDA shop, you should call the district office and report them.
https://www.rx7club.com/showthread.p...smission+fluid
https://www.rx7club.com/showthread.p...smission+fluid
https://www.rx7club.com/showthread.p...smission+fluid
https://www.rx7club.com/showthread.p...smission+fluid
Amoil is probably just fine as long as it's the right viscosity/weight. ^These are just a few of the latest threads I found using "transmission fluid" under a 3rd gen. section search.
I wouldn't drive my car very much until the ATF is drained and proper fluid is put in. If that's a MAZDA shop, you should call the district office and report them.
09-18-04, 06:22 PM
#6
Rotary Freak
Join Date: Aug 2002
Location: nyc+li, ny
Posts: 2,690
Likes: 0
Received 0 Likes
on
0 Posts
I'm really a big fan of Redline. MT90 for the trans and the 75/90 gear oil for the rear.
For what its worth, people recommend using Redline ATF in manual trans of BMWs e36 model. The ATF did feel better than the MTL in my 325s trans. Don't know why you would do that in the 7 though.
For what its worth, people recommend using Redline ATF in manual trans of BMWs e36 model. The ATF did feel better than the MTL in my 325s trans. Don't know why you would do that in the 7 though.
09-18-04, 07:28 PM
#7
Senior Member
iTrader: (1)
Join Date: Mar 2001
Location: Bedford, MA, USA
Posts: 379
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by alberto_mg
I'm really a big fan of Redline. MT90 for the trans and the 75/90 gear oil for the rear.
For what its worth, people recommend using Redline ATF in manual trans of BMWs e36 model. The ATF did feel better than the MTL in my 325s trans. Don't know why you would do that in the 7 though.
For what its worth, people recommend using Redline ATF in manual trans of BMWs e36 model. The ATF did feel better than the MTL in my 325s trans. Don't know why you would do that in the 7 though.
I think that almost any 79/90 trans oil in the trans and 75/90 gear oil in the diff should work, since you should be changing it every 30k miles.
I do run Redline, but it degrades like any other oil and needs to be changed at regular intervals.
Trending Topics
09-18-04, 09:44 PM
#9
Originally Posted by f2racer
Probably because they're used to working on American cars. My manual T-5 Mustang GT uses ATF for trans fluid.
I could understand that if it were a local shop not experienced with our cars. But a dealership? They should still have the manuals.
Do the 8s or any of the other late model Mazdas use ATF in their manual transmissions?
09-18-04, 09:56 PM
#10
NRX7HVN
Join Date: Jul 2002
Location: Colorado Springs, CO
Posts: 597
Likes: 0
Received 0 Likes
on
0 Posts
I'm using Redline MT90 for my tranny and 75W90 gear oil for my diff. I have noticed a huge difference moving the the redline products although my 5 speed can be a bit notchy at times. I've heard Neo might be alittle better, less notchy from owner's I have talked to that have used it.
09-18-04, 10:02 PM
#13
NRX7HVN
Join Date: Jul 2002
Location: Colorado Springs, CO
Posts: 597
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by BATMAN
yeah, how's u know that i use Zaino on my car?
u stalking me?
u stalking me?
No...your car looks like all those black ones on their testimonial page...been thinking about picking up that starter pack, but don't know how much difference it'll make on a white car...I do know it makes black cars DAMN SEXY!!
09-18-04, 10:06 PM
#14
Banned. I got OWNED!!!
Join Date: Feb 2001
Location: Silicon Valley Bay Area
Posts: 102
Likes: 0
Received 0 Likes
on
0 Posts
the next best thing (which I am trying right now) is the Meguiars NXT wax.
It's really good.
The shine and is right up there with Zaino, but without all the work and layers.
If i had a light color car I'd do the Mequiars.
I've tried just about everything.
It's really good.
The shine and is right up there with Zaino, but without all the work and layers.
If i had a light color car I'd do the Mequiars.
I've tried just about everything.
09-18-04, 10:10 PM
#15
NRX7HVN
Join Date: Jul 2002
Location: Colorado Springs, CO
Posts: 597
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by BATMAN
the next best thing (which I am trying right now) is the Meguiars NXT wax.
It's really good.
The shine and is right up there with Zaino, but without all the work and layers.
If i had a light color car I'd do the Mequiars.
I've tried just about everything.
It's really good.
The shine and is right up there with Zaino, but without all the work and layers.
If i had a light color car I'd do the Mequiars.
I've tried just about everything.
I might just have to try the Mequiars NXT...it's like $13/bottle, alot better than almost $100 and like you said without all those layers. I've tried Mequiars 3 step system with the cleaner, polish and wax...it wasn't too bad, but damn it took all day! Either way man whatever is on the car in the pics, very beautiful car.
09-19-04, 12:06 AM
#16
Junior Member
Thread Starter
Join Date: Sep 2004
Location: Canada
Posts: 11
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Sgtblue
I wouldn't drive my car very much until the ATF is drained and proper fluid is put in. If that's a MAZDA shop, you should call the district office and report them.
09-19-04, 12:48 PM
#17
Banned. I got OWNED!!!
Join Date: Feb 2001
Location: Silicon Valley Bay Area
Posts: 102
Likes: 0
Received 0 Likes
on
0 Posts
Of course they'll use ATF in the FD manual trannies (this is complete BS since I have drained plenty of original tranny fluid from the 5-speeds) so that u can get on the "frequent-fler" mileage program at their shop.
11-13-12, 04:58 PM
#23
^Well...I'm still here.
A short google got me to Carbonetic's website. In the FAQ section I found this.....
What oil do I have to use, can I use normal LSD oil?
No we do not recommend standard gear oil with the Carbon LSD, we suggestion using the Carbonetic Oil available from your local dealer. But if you cannot get hold of the Carbonetic oil, we have tested other brands that work with the Carbon LSD:
For FF/AWD application
MOTUL Gear Competition SAE75-140
NEO Synthetic oil 75W90RHD
For FR application
MOTUL Gear Competition SAE75-140
MOTUL 90PA
NEO Synthetic oil 75W90RHD
What oil do I have to use, can I use normal LSD oil?
No we do not recommend standard gear oil with the Carbon LSD, we suggestion using the Carbonetic Oil available from your local dealer. But if you cannot get hold of the Carbonetic oil, we have tested other brands that work with the Carbon LSD:
For FF/AWD application
MOTUL Gear Competition SAE75-140
NEO Synthetic oil 75W90RHD
For FR application
MOTUL Gear Competition SAE75-140
MOTUL 90PA
NEO Synthetic oil 75W90RHD
11-15-12, 02:52 AM
#25
17 second FD
iTrader: (11)
Join Date: May 2006
Location: Poughkeepsie, New York
Posts: 2,436
Likes: 0
Received 1 Like
on
1 Post
Use a GL-4 for the transmission and a GL-5 for the diff.
My suggestion? Amsoil all the way.
GL-4(2.8 quarts):
AMSOIL - Synthetic Manual Transmission and Transaxle Gear Lube 75W-90 (MTG)
GL-5(1.2 quarts):
AMSOIL - Severe Gear® Synthetic Extreme Pressure (EP) Gear Lube 75W-90 (SVG)
My suggestion? Amsoil all the way.
GL-4(2.8 quarts):
AMSOIL - Synthetic Manual Transmission and Transaxle Gear Lube 75W-90 (MTG)
GL-5(1.2 quarts):
AMSOIL - Severe Gear® Synthetic Extreme Pressure (EP) Gear Lube 75W-90 (SVG)