Redline Synthetic "75w-90 NS" Tranny Gear Oil

[12/31/2006] Reviewed by: Bill Latsha - wjlatsha@ptd.net

Applicable to: '90 - '97 '99-'05 1.8 liter

The Redline "75w-90 NS" Synthetic Gear Oil is specifically designed for Manual Transmissions. It has components in it to help the snychronizers grab better, for a smoother, faster shift.

** I put Synthetic Redline 75w-90NS in my 2002, 5 speed tranny. I must say that compared to the Dino Gear Oil that was in there, I am really impressed! The "NS" version is specifically for Transmissions, and formulated to make the snychronizers grab quicker, for a smoother shift. I really had some problems in the cold (32 degree) mornings with crunching from 1st to 2nd gear. I had even had a few mornings where I heard gears crunching as if there was no snychros at all. Since I put in the 75w-90 NS, The cold mornings have been improved noticably, especially the 1st time I shift into 2nd gear. My most noticable improvement is when the engine and tranny is warmed up. I am amazed at how much smoother the tranny shifts into all gears! I am normally not the kind of person to rave about a product, but this Redline gear oil really changed my transmission, over the Dino Gear Lube that was in it. In and out of all gears, even reverse, is now as smooth as cutting butter with a hot knife. I am glad I took a chance and tried this item. My Tranny seems to be quieter now too. I don't hear any gear whine or noise.

As my 2002 was approaching the 60,000 mile service point. I wanted to change the Gear oil in the Tranny & Differential, and researched grear lubes here & on the Web. I decided to try Synthetics, because so many people raved about them. Based on my research, and comments from other posters here, I settled on Redline Gear Lube. I was not expecting any miracles, but did hope for some shifting improvements. I am really glad I tried this item!

Under 30 minutes to remove completely

Redline MT-90

[7/12/2005] Reviewed by: Eddie Perez - erperez@gmail.com

Applicable to: '90 - '97 '99 + 1.6 liter 1.8 liter

Redline MT-90 synthetic transmission oil

I decided to try the Redline MT-90 because of a comment on the forums about its ability to keep the miata tranny cooler. I was trying to decide between the MTL and the MT-90 at the time. I'd been having issues with the console area heating up while driving and I figured I was having the same problem someone else described. Installation was simple, I followed the instructions in countless forums and books. I ended up using a funnel with vinyl tubing to fill the tranny and differential with the new fluids. this was easy. My console area no longer heats up the way that it used to. Shifting is smoother than before the switch. I would highly recommend this product!

Good product! I would recommend it to anyone!!

Under 30 minutes to remove completely

Redline MT-90

[6/29/2001] Reviewed by: chris tran - cxc44@yahoo.com

Applicable to: 1.6 liter 1.8 liter

tranny oil

decided to try this b/c of much praise about redline and wanted smoother shifting. went with this after comparing with the MTL. tranny tunnel seems to have cooled down. don't forget to do the turret oil as well.

hakuna's page is very helpful...also check these bulletins in regards to the notchy shifting: http://www.miata.net/garage/tsb/s004_92.html (bulletin#: 04/92)
http://www.miata.net/garage/tsb/sb005_93.html (bulletin#: 005/93)

Not an installed item

[1/13/2000] Reviewed by Jeff Barlow - jabarlow@nortelnetworks.com

Applicable to '90 - '97 '99 + 1.6 liter 1.8 liter

synthetic 90W transmission oil

Have used Redline's MTL since the car was new. I loved the way it improved shifting. A few things worried me slightly though. 1) Mazda asks for a 90W transmission oil and 2) there was a noticeable increase in the heat coming from the transmission into the car during normal driving. Not enough to cause alarm, but noticeable. When it came time to change the transmission oil I noticed that Redline has come out with a 90W transmission oil, MT-90. Same formulation as MTL but in 90W. All concerns are gone now with all the same benefits!

Reduced operating transmission temps, still buttery shifts even at cold start, and manufacturer's suggested grade/viscosity. For an everyday Miata, the MT-90 is the way to go over the MTL.

Not an installed item

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