Red Line 50204 SAE 75W80 API GL-4 Manual Transmission and Transaxle Lubricant (MTL) Car Gear Oil - 1 Quart (2 Pack)

I have an '07 BMW 550i with a stick shift that I picked up this past summer. No idea when or if the transmission oil was last changed. The gearbox mostly shifted fine, but there were times it was reluctant to go into gear, and crunched a weee bit on occasion, so I figured a transmission oil change was a good first step. BMW, of course, only recommends their own $50+ per liter solution, but this redline MTL was recommended on a couple of sites / forums @ half the price.Oil change was stupidly easy, with the worse part being the removal and reinstall of the underbody tray. Note that the car does need to be level in order to refill the gearbox properly, so that may be easier for some than others. I am fortunate enough to have a lift, so it was <30min job. It took a full 2qts, so if you have an e60 V8 BMW manual, you may want to grab a 3rd qt just in case you have some spillage. There are plenty of online videos with instructions you can search for help.The old oil in the gearbox was definitely well used, but not so terrible that I would believe it to have been the original oil. BMW has this stupid concept of "lifetime fill" with transmission fluid for the past ~20 years. This obviously discourages proper maintenance, so it really wouldn't have been surprising to find original fluid in a 16 year old car with 110k miles. I did the differential fluid as well with the redline oil recommended for that application.I did not notice much of a change the first couple trips after the oil change, but after 50-100 miles, I could definitely tell the difference. Every shift has a more "syrupy" feel to it, and the shifts slot into place with a more positive action overall. This gearbox still doesn't like to be rushed. This MTL fluid won't turn your BMW into a Honda, but it definitely works well and costs a lot less than the "genuine" oil. Definitely a worthwhile job to perform yourself, if you are able, and a great product to improve the driving experience.

The media could not be loaded. I use it on my FK8 Type R. Works fine as expected. Feels similar to AC Delco synchromesh but not as smelly. Clear in color. Shifts are pretty smooth.I used GM synchromesh on the first MTF change, then Redline 2nd and 3rd MTF change. Barley any metal particles. Transmission has seen a lot of racing.

Redline MTL is a recommended transmission fluid for the Jeep NV3550 transmission. If you go to the Novack site where they explain everything about this transmission you’ll see they recommend this fluid. I like Redline MTL due to smooth shifting but most importantly it’s safe for yellow metals, such as brass synchronizers.

Really good stuff at a great price! I drained my 1996 Corvette's standard transmission and put this awesome Redline MTL in it. Car has 56000 miles on it when I purchased it this May. The 6 speed ZF transmission shifts smoothly now, and transmission whine is gone! Not sure if Amsoil is better, but so far I am sticking with Redline.

I use this in my 2005 Jeep Wrangler with the 6 speed manual transmission (NSG370). I tried the Royal Purple Synchromesh fluid when I first got my Jeep (6yrs ago) but had problems after spending time on the freeway or in 4WD, heat would build and cause difficulty shifting. I put this Redline MTL in and all those problems went away. This is my second time buying this fluid to put in my transmission. I had about 50,000 miles on the fluid before it started showing signs of wearing out. It’s a small price to pay for the performance and longevity of the transmission.

The 2006-2008 Civic Si's have a 2nd or 3rd gear grind, for me it was happening everytime at high RPM's. So I got a Hybrid Racing CMC and Slave Cylinder kit, Acuity Shifter Bushings, and new transmission fluid. I have already used Honda OEM transmission fluid before and it would still grind.So I got this fluid instead just to try out and it actually does help a little bit. If I recall correctly this has different operating temperatures than the Honda OEM fluid and reacts differently to different synchros at high RPM's. For me, it just improved the overall shifting feel, everything feels a lot more crisp and tactile when going into gear which is very nice.This isn't a definite fix to gear grinds, I highly recommend getting the Hybrid Racing CMC and Slave Cylinder kit since with the new slave and clutch line, it makes installing a lot easier and it aids in the transmission responsiveness as well. Hondata will help with rev hang so you can really bang gears, Acuity and Hybrid Racing shifter cables/bushings help a lot with shifting feel.All of this and a possible transmission rebuild/repair will definitely fix the transmission problems and you'll be banging gears all day. I've only been running this fluid and the hybrid racing kit and the grinding has basically fixed itself. I grinded 2nd like once trying to powershift but it still went into gear and I chirped 2nd, but that's due to my 2nd synchro being damaged, I've literally grinded that thing over a hundred times.Motor mounts will also help a lot with reducing drivetrain shock (aka how your gears grind half the time) as well. But this fluid is a minor band-aid solution and I'm not totally sure on the reliability aspects in certain ambient/operating temperatures and how they would react but it should be all fine and safe to use.Overall, it improves shifting feel and can be a band-aid solution for gear grinds.

This is highly recommended within the automotive community. Works great as expected.

This synthetic oil helps the transmission shift buttery smooth. I tried the Honda brand filled and installed at the dealership. And the Honda oil just isn’t as good. It’s meh at best.Redline oil is what I use for now on, for as long as I have this car.