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Red Line V-Twin Transmission Oil with Shockproof

Red Line V-Twin Transmission Oil with Shockproof

Red Line VTwin Transmssion Oil - 1 US Quart (0.946 Litre)

1 US Quart (0.946 Litre)


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  • Description
  • Benefits
  • Specifications
  • Shipping Explained

Red Line V-Twin Transmission Oil with Shockproof

This product dampens transmission noise (reducing the notorious shifting clunk found in these gearboxes), dramatically reduces temperature, and provides thicker oil films between gear teeth and resists throw-off.
  • For all aftermarket versions like Baker, JIMS, S&S, etc.
  • For all H-D® trans including with Milwaukee-Eight engines, Evolution engines, Twin Cam engines and latest 6 speed Cruise Drive
  • Same fluid as Red Line's unique Heavy ShockProof® Gear Oil
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. 

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% lower coefficient of friction and 250% the load-carrying capacity compared to conventional gear oils, which means that metal-to-metal friction is greatly reduced. Temperature reductions between 25°F - 75°F are common in circle track, road racing, and off-road racing. 

The cushioning effect of the ShockProof™ chemistry allows the use of one of the lighter viscosities in many performance applications with little sacrifice in durability. 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.

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  • Greatest extreme-pressure protection 
  • Reduces metal-to-metal contact
  • Lowest coefficient of friction available 
  • Compatible with petroleums and synthetics
  • Reduces temperatures dramatically 
  • Low fluid friction to improve power transfer
  • Provides thicker oil films between gear teeth 
  • Provides gear teeth shock loading protection
  • Completely resists throw-off 
  • Reduces gear noise




SHIPPING IS FREE* for orders of £75 and over , regardless of the weight of your order.
We've tried to keep all other shipping costs as low as we can.

Carriage starts at just £0.95 (inc VAT) for small items, with our most common courier rate set at £5.99 for orders of 5kg (enough for 5 litres of oil).

  • *Free shipping is available for UK Royal Mail, UPS Access Point™ (click & collect) and standard UK courier services (not express / priority / islands).
  • Courier surcharges mean we are unable to offer free "to the door" courier shipping from us in Cornwall up to Highlands / Grampian in Scotland - and because we send a lot of liquids, not every courier option is available to us. UPS Access Point™ (click & collect) is available as a free shipping option across Scotland, Wales and England, wherever there is a UPS Access Point™ Location.
  • Carriage charges are based on weight - please see our table of carriage costs for full details (although adding an item to your cart and viewing the calculated carriage is often easier!).
  • Priority shipping is also available.

How long will it take to get my order?

We give an estimate of delivery dates as you shop and in your basket. The vast majority of items are held in stock and dispatched from our UK warehouse and we'll do all we can to get your order to you as quickly as possible.

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