Not rated yet
Search parts for your vehicle
Red Line MT-90 75W90 GL-4 GEAR OIL
Red Line MT-90 75W90 GL-4 Gear Oil
Red Line MT-90 75W90 GL-4 Gear Oil is the ultimate choice for high-performance vehicles. Experience smoother shifting and improved gear protection with this top-quality gear oil.
- 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 reactive sulfurs found in most GL-5 oils that cause damage
- High performance gear protection and longer synchro life
- Eliminates notchy shifting, even when cold
- 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
Regular Product
- Shipping info
We deliver worldwide.
- Payment methods
- Return Policy
We encourage people to only return unused items.
Why Red Line MT-90 75W90 GL-4 Gear Oil is the Best Choice for Your Vehicle
The most popular, the most viscosity, the most applications.
Red Line MT-90 75W90 GL-4 Gear Oil is specially formulated to provide maximum protection and performance for your gears. Upgrade your vehicle's performance with this top-rated gear oil.
Red Line MT-90 75W90 GL-4 Gear Oil is a top-tier lubricant designed to optimize the performance and longevity of your vehicle's manual transmission. Here are the compelling reasons why MT-90 is considered the best choice for discerning drivers:
1. High-Quality Formulation: MT-90 is crafted with a high-quality synthetic base oil and advanced additives. This superior formulation ensures excellent lubrication and protection for manual transmissions, promoting smooth operation and extended component life.
2. GL-4 Specification: MT-90 is classified as a GL-4 gear oil. This specification is crucial for manual transmissions, providing the necessary anti-wear and extreme pressure protection without the additives that can harm synchronizers in GL-5 oils. The GL-4 designation makes it ideal for transmissions without hypoid gears, commonly found in front-wheel-drive and many rear-wheel-drive vehicles.
3. Optimal Synchronizer Performance: The specific formulation of MT-90 is tailored to enhance synchronizer performance. This is vital for seamless gear engagement and shifting, contributing to a more enjoyable and responsive driving experience.
4. Exceptional Shear Stability: MT-90 exhibits excellent shear stability, meaning it maintains its viscosity and protective properties even under the high shear forces experienced in modern transmissions. This stability ensures consistent lubrication and wear protection over the oil's service life.
5. Reduced Gear Wear: The anti-wear additives in MT-90 help reduce gear wear, minimizing the risk of pitting and scoring on gear surfaces. This is crucial for maintaining the integrity of the transmission's internal components.
6. Enhanced Thermal Stability: Manual transmissions can generate heat during operation. MT-90's enhanced thermal stability helps the oil maintain its performance characteristics at elevated temperatures, ensuring reliable lubrication even in demanding driving conditions.
7. Improved Shifting in Cold Weather: The 75W90 viscosity rating ensures that MT-90 remains fluid even in cold temperatures. This improves shifting characteristics in chilly conditions, enhancing drivability during cold starts.
8. Reduced Transmission Noise: The excellent lubrication properties of MT-90 contribute to reduced transmission noise. This is particularly important for those who appreciate a quiet and refined driving experience.
9. Long Service Life: MT-90 is known for its longevity, providing extended service intervals compared to lower-quality lubricants. This can translate to cost savings over time and less frequent maintenance for your vehicle's transmission.
10. Trusted Brand: Red Line is a reputable brand with a history of producing high-performance lubricants. Choosing MT-90 is a testament to the brand's commitment to quality and innovation in the automotive lubricant industry.
In conclusion, Red Line MT-90 75W90 GL-4 Gear Oil is the best choice for your vehicle's manual transmission if you prioritize optimal shifting, reduced wear, and exceptional performance in various driving conditions. The GL-4 specification, along with the high-quality formulation, makes it a preferred lubricant for enthusiasts and drivers who demand the best from their manual transmissions. Always follow the manufacturer's recommendations for your vehicle's specific transmission fluid requirements.
Since most GL-5 gear oils for differentials are too slippery for manual transmissions, Red Line offers these products that ensure proper shifting while providing ultimate wear protection
- Appropriate coefficient of friction for most manual transmission synchronizers (other's synthetic gear oils are often too slippery for proper synchro engagement)
- Red Line offers lubricants to pinpoint nearly every transmission application
- MT-LV, MTL, MT-85 & MT-90 are not for use in differentials with hypoid gears
- Excellent gear and synchro protection, balanced slipperiness for easier shifting in cold climates
- Excellent for high- and low-mile transmissions
- Compatible with petroleums and other synthetics
TYPICAL PROPERTIES
| API Service Class | GL 4 |
| SAE Viscosity Grade (Gear Oil) | 75W90 |
| SAE Viscosity Grade (Motor Oil) | 15W40 |
| Vis @ 100°C, CSt | 15.5 |
| Vis @ 40°C, CSt | 82 |
| Brookfield Viscosity @ -40°C, Poise | 320 |
| Viscosity Index | 200 |
| Pour Point, °C | -45 |
| Pour Point, °F | -49 |
RED LINE MT-90 HIGH-PERFORMANCE GEAR OIL is a full-synthetic ester-based lubricant designed for use in manual transmissions and front-wheel-drive transaxles. This shear-stable formula resists breakdown for extended periods and offers more consistent viscosity in warm and cold temperatures for less gear noise and improved shifting. This fluid is less slippery for improved synchronizer coefficient of friction and offers stronger film strength for better wear protection.
Suitable replacement for:
API GL-4/GL-3/GL-1
SAE 75W90 SAE 90/80W90
SAE 40/10W40/15W40
Alfa Romeo
Audi G 052 911
BMW MTF-LT-4
BMW 81 22 9 407 305
BMW 83 22 2 339 223
Castrol BOT 130M
Castrol BOT 328
Castrol SAF AG4
Castrol TAF-X 75w-90
Castrol Syntrans Transaxle 75W-90
Ford F32Z-19C547-MA
Ford M2C175-A
Ford M2C200-B
Ford WSS-M2C203-A1
Ford XT-4-QGL
GM 12345371
GM 12345724
GM 12345871
GM 12346074
GM 89021806
GM 89021807
GM-Daewoo EDS-M-8049
Holden
Hyundai/Kia 08950-00010-A
Hyundai/Kia 04300-5L1A0
Jeep 0489722AA
Lotus
Mazda (MES) 115A
Mazda 0000-77-114-QT
Mazda L.L. Manual Gear Oil IS
MB 235.11
MB A 001989510310
Mitsubishi
Mobil SHC 630
Nissan Mission Oil MP-G HQ
Opel
Skoda
Toyota 08885-80917
Toyota 08885-81023
Toyota 08885-81026
Vauxhall
VW/Audi G 005 000
VW/Audi G 005 100
VW/Audi G 045 190 A2
VW/Audi G 052 145
VW/Audi G 052 157
VW/Audi G 052 911
VW/Audi G51
VW/Audi G50
VW/Audi 501.5
Shipping Policy
Shipments to the Contiguous 48 US States
Orders $149.99 and over qualify for our fast free shipping offer. We have worked with our shipping companies and integrated their shipping prices with our website for customer comfort.
Please see our International Orders page for orders shipping outside the US. We have worked with our shipping companies and integrated their shipping prices with our website for customer comfort.
For a specific delivery ETA based on the exact item(s) you want to purchase, please call us at (248) 832-2444 or message us via Chat before placing an order.
We understand that when you make an order, you want your gear as quickly as possible and we will do our best to make that happen! Most of the items we sell will ship quickly and be at your door fast. We work closely with our vendors in order to have the product shipped directly to you from their warehouse if that means you will get the product faster.
Items will have an availability status shown once a size/color is selected on the product page; this availability status will also be shown on the shopping cart page and in your order confirmation email. Most products will be marked "In Stock - Ships Within 24 Hours". These products will ship same or next business day. The earlier in the day the order is placed, the better the chance it will ship that day.
While we will do our best to ship from the distribution center closest to you, not all items will always be in stock in every location at all times. In some cases we will split the order and ship each package out to you individually and in other cases we may need to consolidate the items in one location to ship out as one package. We utilize our best judgment in an attempt to get the products to you as quickly as possible.
Some items will be marked "Available - expect 3-5 business days lead time prior to shipment". These items cannot ship the same day and require lead time prior to shipment. If you select an expedited shipping method, please note that this will not reduce the lead time before the order is shipped.
Shipping Method Explanation
Business days are Monday-Friday; Holidays, Saturday and Sunday are not included in shipping days. Shipping timelines are estimates and are not guaranteed.
PO Boxes
Orders shipping to PO Boxes may require 3-5 business days processing prior to shipment in order to ensure delivery via the US Postal Service. Please contact customer service for the most accurate delivery estimates. Additionally, certain oversize items may be restricted from delivery to a PO Box depending on the policies of the receiving facility.
Alaska / Hawaii / U.S. Territories
Orders shipping to Alaska, Hawaii and U.S. Territories including Puerto Rico, Guam, and U.S. Virgin Islands will ship via the United States Postal Service.
International Orders
Orders shipping to an International destination will ship via FedEx, DHL or UPS from either our fulfillment center in Philadelphia or Las Vegas. Please allow an additional 1-5 business days to process your order.
Hazardous Items
Items designated as hazardous (such as paints and chemicals) may only be shipped via ground shipping to the contiguous 48 US states. Hazardous items will be clearly identified during the shopping process.
Tires
We are currently only shipping tires to the contiguous US 48 States.
Oversize Items
Oversize items are currently only being shipped via Ground to the contiguous 48 US states. Oversize items will be clearly identified during the shopping process. Oversized items include: ramps, fairings, motorcycle stands, fenders, street and dirt bike stands, certain full exhaust systems, street and cruiser handle bars, rims, seats, etc.
Delivery Policy
Typically packages will be left at your door and do not require a signature. Sometimes we will ship an item vendor direct and those vendors may require a signature on their shipments. If you absolutely need one way or the other, please contact Customer Service before placing your order.
Backorders
2to4wheels.com does typically take back orders, based on the availability of the item.
Damaged Goods
If an item arrives visibly damaged, please contact us immediately. Claims are handled through the shipping carrier, but we will assist customers with these claims to the best of our ability.
RETURN AND REFUND POLICY
1. Returned products must be in new, unused condition and include the original box and/or packaging with all tags included.
2. Once your return is received and inspected by MotoKarMax (usually within 48-72 hours of receiving), your refund will be processed and a credit will be applied to your credit card or original payment method. Please note that depending on your credit card company, it may take an additional 2-10 business days after your credit is applied for it to be posted to your account.
3. For wire transfer payments, all refunds will be issued in the form of a gift card.
4. You are responsible for all shipping costs associated with getting your order back to us.
5. Please do not abuse this policy by ordering multiple (more than 2) of the same or similar item with the intention of returning the majority of your order. Please contact us if you are unsure of sizing or application for any items prior to placing your order and we will be happy to help you narrow it down!
6. See below for instructions on where/how to get your return order back to us. Items should not be shipped back to the manufacturer; all returns need an RMA (Return Merchandise Authorization) number and will need to be returned to us.
Return Shipping Options
1. For customers in the contiguous 48 U.S. States, 2to4wheels provides the option of printing out a pre-paid UPS/ Fedex shipping label for a fee (calculated later). This fee will be deducted from your total refund amount.
2. For customers in any location, you have the option of using the carrier of your choice to return your order to us. We recommend shipping with a method which includes tracking and insurance for your return shipment.
3. All shipments must be made prepaid; packages shipped COD will be rejected. Any Refused, Undelivered, or Abandoned package will be subject to a $10 Service Fee.
Exchanges
1. Need to make an exchange? After you process your return, simply place a new order for the exchange merchandise. That means you'll claim the inventory and get your new gear fast!
2. You are still responsible for return shipping costs on your original order back to us.
Order Cancellation / Modifications
1. If you change your mind, act quickly and let us know!
Used or Damaged Merchandise
1. Any merchandise which has been "taken out for a ride" is considered used and cannot be returned. We encourage you to walk on your carpet in your boots and to try your motorcycle helmet on indoors before heading out on the bike.
2. Any merchandise or parts which shows signs of use (wear, bugs, dirt, smell, pet hair, scuffing, mounting, etc) or otherwise is in a condition other than it was received cannot be returned.
3. Craigslist, eBay, Facebook Marketplace and other online forums are excellent resources if you have a used item you do not want that can no longer be returned back to us.
Apparel and Helmets
1. Apparel items must be packed in their original garment bag (or equivalent plastic bag protection) and include all original tags. The plastic bag protects the item from the cardboard. Items packaged without this protection most likely will arrive scuffed and will be returned to the customer.
2. Helmets must be shipped back as they were received in their original helmet bag, box and include all original paperwork and accessories.
3. Un-used items that are returned with missing or damaged packaging, tags, components, or hangers may be returned to the customer or subject to an additional processing fee of up to 25-50% of the merchandise cost based on the availability of those missing or damaged components.
Electronics, Hard Parts, Tools, Tires
1. Any electronic which has been removed from packaging or manufacturer seal broken is non-returnable.
2. Any part which has been installed or shows signs of attempting to be installed on a vehicle is non-returnable.
3. Any Tool or Chemical that has been opened or seal broken is non-returnable.
4. Open box items for which the packaging has been destroyed are not returnable.
International Returns
1. International shipments should be marked as a "Merchandise Return" with a carrier that does not levy brokerage fees. Customer is responsible for any applicable brokerage or customs charges.
2. Any items shipped COD or having additional brokerage fees that are charged to us upon delivery will be rejected.
Defects
1. Each manufacturer has its own warranty policy. MotoKarMax will assist customers with their warranty; however MotoKarMax does not provide any direct warranty on any item sold.
Warranty Returns
1. Most manufacturers offer an additional warranty period which covers against merchandise defects. To determine warranty requirements for a specific item, please contact the manufacturer or contact us for assistance.
2. Please note warranty processing may take 4-8 weeks and will be subject to the individual manufacturer's policies and discretion. Manufacturer warranties do not cover defects determined to be caused by normal wear or due to customer negligence.
Damaged Items
1. Please let us know ASAP if any items on your order arrive damaged. Please keep all original shipping containers and take pictures if possible. Damaged item claims are handled through the shipping carrier. We will assist our customers in these claims. We only ask that customers be patient as sometimes this process can take longer than any of us would like!
Returns Process
You can request a return authorization number (RMA#) online at www.2to4wheels.com or you may also initiate a return by calling us.
Step 1: Click "Login / Register" or "My Account" (if you are already logged in) at the top of the web page. Once you are within the "My Account" area of the website, click on "Order History" on the left-hand side of the page and find the order in question and click "View".
Step 2: Select the item(s) you would like to return from your order and be sure to choose the reason for returning each item.
Step 3: Select your return shipping method and follow instructions.
Step 4: Please print your Return Authorization form and include it with each shipment back to us. You have 7 days from the day the RMA is issued to return your merchandise so please be sure to print and ship at your earliest convenience. Please do not tape anything to the original product packaging! We need to get all products (and their packaging!) back in new condition. Place all merchandise in a shipping box; you may use the original shipping container. However, please DO NOT use the manufacturer's product box as the shipping container. It will arrive damaged and the package will be rejected by our returns department. Returns should be shipped to the following address unless otherwise noted on your return authorization instructions:
MotoKarMax LLC
Attn: Returns (RMA# XXXX)
41000 Woodward Ave
Suite 350 East
Bloomfield Hills, MI 48304
Please retain your return tracking information. We are not responsible for packages lost during return shipment. You will receive a confirmation email from us when your return is processed which will include the full details of refund credited.
