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Description
Red Line Heavy ShockProof Gear Oil 58204Red Line Synthetic ShockProof Gear Oil provides unequalled protection for high performance differentials and transmissions which are heavily loaded or which see shock loading. This revolutionary lubricant is completely different from conventional lubricant technology in several ways. The viscosity characteristics are significantly improved. Gear teeth need high viscosity at high temperatures to prevent metal to metal contact and a low viscosity when
Red Line Synthetic ShockProof™ Gear Oil provides unequalled protection for high performance differentials and transmissions which are heavily loaded or which see shock loading. This revolutionary lubricant is completely different from conventional lubricant technology in several ways. The viscosity characteristics are significantly improved. Gear teeth need high viscosity at high temperatures to prevent metal to metal contact and a low viscosity when cold to reduce fluid friction. The ShockProof™ chemistry significantly reduces the thinning effect of high temperatures. The Heavy can be rated as a 75W250 Gear Oil, but has the lower internal fluid friction of an SAE 75W90. The Lightweight can be rated as a 75W140 Gear Oil, but has the lower internal fluid friction of an SAE 30 motor oil. The SuperLight can be rated as a 70W90 Gear Oil, but has the lower internal fluid friction of an Automatic Transmission Fluid. These ShockProof™ lubricants provide much greater viscosity in the thin layers between the gear teeth, but have very low internal fluid friction, which means very little power loss for the protection achieved. ShockProof™ Gear Oil has a 40 Percent lower coefficient of friction and 250 Percent the load carrying capacity compared to conventional gear oils, which means that metal to metal friction is greatly reduced. Temperature reductions between 25 to 75 Degree Fahrenheit are common in circle track, road racing, and off-road racing. Improved durability in high performance use is the primary benefit of the Heavy ShockProof™ and along with the improved durability is an improvement in efficiency, but if further improvements in efficiency are desired, and durability is not a major concern, Lightweight and SuperLight ShockProof™ can be used. Red Line ShockProof™ can be used in conventional, limited slip, or locker differentials. Red Line ShockProof™ is designed for use in competition differentials and transmissions.
Viscosity Grade: SAE 75W250, SAE 75W90
Use: Racing Differentials And Transmissions
Type: Synthetic
Unit Size: 1 Quart
Unit Type: Bottle
Features
- Film Thickness Greater Than An SAE 75W250, Yet Low Fluid Friction Like 75W90
- For Heavily Loaded Racing Differentials And Transmissions, Problem Gearboxes
- Unique Lubricant With Solid Microscopic Particles Offers Low Drag/High Protection
- Relatively Low Viscosity, Yet Cushions Gear Teeth Under Extreme Pressure
- Helps To Prevent Tooth Breakage, Resists Throw Off
- Avoid Use With Pumps, Coolers, And Filters As Unique Medium And Affinity For Metal Can Cause Clogging
- Designed For Wet Sump Transmissions And Differentials With Splash Lubrication
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 244 reviews
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Product Reviews
★★★★★ 1
Falls apart within minutes!
I’m a real human and person (sad I have to say that) who bought these stupid balls for my dog because tennis balls are EXPENSIVE. She chewed on them only a few times and the balls split in half into two hemispheres right away. Plus, she could rip the felt off the entire ball in less than an hour. Absolutely terrible and I truly threw money away because I threw away the original packaging and so I can’t get my money back! Very disappointing and sad :-(. Turns out that Play Again sports sells used tennis balls for $0.35 each. Sorry, Amazon. I’m getting my tennis balls from them from now on 😠
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Reviewed in the United States on May 8, 2025
★★★★★ 1
Do Not Buy!!
I just opened these balls up and what a waste of money. They don't bounce at all. They are made not like how normal tennis balls are. They are filled with so much air on the inside to where they bust really easy. They also have so much glue on them and that even comes off really easy. I paid $ 25 and some change and what a waste. The first ball only lasted a few seconds it's already shredded and busted. I do have a dog with a strong mouth and that is why I picked these balls they seemed they were made to last. I have an Old English Bulldogge and the ball lasted only seconds. Threw the ball out to her she put it in her mouth and Poof not a ball anymore.DO NOT BUY AT ALL!!!
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Reviewed in the United States on February 20, 2023
★★★★★ 3
To easy to chew through.
These are already broken on the inside not safe for dogs. I am a groomer and ordered these to send home with my customers but the rubber in the middle is already broken and they can easily chew through the surface. It could ingest it and that isn’t safe.
Good for a dog that doesn’t chew
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Reviewed in the United States on April 24, 2025
★★★★★ 5
Doesn’t squeak but the dogs still love them
Our doggies love them!! Very durable! They do not squeak though
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Reviewed in the United States on May 7, 2026
★★★★★ 5
10/10 for my dogs
Color: A.Orange+Blue+Green
super bouncy and fun for my dogs! they love playing with and tossing them around! hard to see in the water tho!
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Reviewed in the United States on May 29, 2026