hd 90 gear oil Red Line 50305 MT-90 75W90 GL-4 Gear Oil
SKU: 75198447792
hd 90 gear oil

hd 90 gear oil Red Line 50305 MT-90 75W90 GL-4 Gear Oil

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Description

hd 90 gear oil Red Line 50305 MT-90 75W90 GL-4 Gear OilRed Line MT 90 75W90 GL4 gallon RallySport Direct is proud to bring you some of the best lubricants in the industry brought to you by Red Line. This is the very popular and highly utilized Red Line MT 90 Manual Transmission Gear Oil. This gear oil has been specially formulated to have the appropriate coefficient of friction for most manual transmission synchronizers that is combined with a great viscosity balance to help cure hard shifting issues in

Red Line MT-90 75W90 GL4 - gallon

RallySport Direct is proud to bring you some of the best lubricants in the industry brought to you by Red Line. 

 

This is the very popular and highly utilized Red Line MT-90 Manual Transmission Gear Oil. This gear oil has been specially formulated to have the appropriate coefficient of friction for most manual transmission synchronizers that is combined with a great viscosity balance to help cure hard shifting issues in most manual transmissions. The MT-90 is a fully synthetic lubricant with a very high viscosity index which provides relatively constant viscosity as temperature changes to provide your shifts with a consistent feel through a variety of temperatures while offering optimal friction protection.

 

DETAILS:

  • 75W90 - GL-4 gear oil (similar to SAE 5W40 / 10W40 engine oil viscosity)
  • Popular in Nissan, Mazda, Mitsubishi, VW/Audi, Lotus Elise/Exige, Toyota, Mendeola transmissions and Atlas transfer cases for off-road
  • Offers quicker shifts, perfect synchronizer coefficient of friction
  • Safe for brass synchros, as it lacks the reaction sulfurs found in most GL-5 oils that can cause damage
  • High-performance gear protection and longer synchro life
  • Helps eliminate notchy shifting even in cold conditions
  • Satisfies the gear oil viscosity requirements of 75W90, 80W90, 90, and motor oil viscosities of SAE 40, 10W40, and 15W40
  • Recommended for GL-1, GL-3, and GL-4 applications as well as where most special synchromesh fluids are specified
  • Sold individually in a 1-gallon container

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 75198447792

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Jay n Debbie (Pillars-Of-Truth)
Phoenix, US
★★★★★ 5
Strong, Durable, and SIMPLE Frother
Color: Gray
Excellent frother! It is ‘SIMPLE’, yet very efficient blending. I love that it included a set of long-lasting batteries. The motor on this frother is strong and works great. The item itself is of durable quality. I have had mine for about 9 months and use it daily for my coffee and other drinks throughout my week, and the battery is still running. I even give it a spin after washing the frother spinner/coil. This helps to dry it thoroughly, as the motor is strong enough to blow away any excess water - and still - the batteries are functioning well. The price is just right…very affordable compared to other brands. I’m very pleased with this purchase and absolutely love that it also came with a stand. I display it on my counter everyday. There are 3 solid and Simple colors to choose from, making this an easier shopping experience. Excellent choice for gifting!
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Reviewed in the United States on March 19, 2026
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Avista
Los Angeles, US
★★★★★ 5
Found the perfect chai frother on a budget!
Color: Glossy Black
Okay so I'll be honest, I spent way too long researching milk frothers before pulling the trigger on this one lol. As someone who grew up drinking chai every single day, having a good frother is kind of a big deal in my house. This little thing has been absolutely worth every penny. First off – it's SO easy to use. My 7 year old actually thinks it's the coolest thing ever and wants to help make my morning coffee now, which is honestly adorable. It just works, no fuss, no learning curve. What really sold me compared to other options was the USB-C charging. No more buying AA batteries every few weeks – that stuff adds up! I just plug it into the same charger as my phone. Super convenient. And here's a small thing that matters more than you'd think – it stands on its own! I don't need a separate stand cluttering up my already busy kitchen counter. Build quality feels solid, the stainless steel whisk looks clean and is easy to rinse off. For the price, honestly I expected less. Highly recommend if you're on the fence!
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Reviewed in the United States on April 24, 2026
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Amazon Customer
Grantham, US
★★★★★ 5
Nice handheld frother!
Color: Glossy Black
Handheld frother....tiny but mighty! Holds a charge for a number of uses before needing to plug in. Easy to use, easy to clean and works well. Doesn't take up a bunch of real estate on the counter or in the drawer. I would totally recommend this product.
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Reviewed in the United States on May 31, 2026
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Dr. Manetta
Houston, US
★★★★★ 5
Perfect for Protein Coffee & So Easy to Use
Color: Gray
The SIMPLETaste Handheld Milk Frother works great and has become part of my morning routine. It mixes protein powder into my coffee so much better than stirring with a spoon—smooth, frothy, and no clumps. It’s lightweight, easy to use, and powerful enough to quickly blend coffee, protein powder, creamers, or even matcha in seconds. Cleanup is simple, and it stores easily in a drawer. If you love adding protein to your morning coffee, this little frother is a game changer!
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Reviewed in the United States on May 10, 2026
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Calling Home
Natrona Heights, US
★★★★★ 4
The Stand Is the Unexpected Favorite
Color: Gray
I use this at my morning coffee station for mixing powdered supplements into my coffee shake — more than one goes in and it handles them without complaint. For a small battery-operated device it has real power. Cleans easily. The foam quality is good for home lattes without any particular technique required. But my favorite part is, unexpectedly, the stand. It’s sturdy and well made and gives me somewhere sensible to set a dripping frother instead of it lying on the counter. A small thing that earns its counter space.
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Reviewed in the United States on May 30, 2026

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