My Cart


Redline ShockProof Gear Oil


Jacks Transmissions is proud to announce that we are now an authorized REDLINE dealer! We currently have Heavy ShockProof and Lightweight ShockProof IN STOCK!

Price is per quart!

Acting like a liquid grease, these unique lubricants contain a suspension of solid microscopic particles as an extreme pressure agent, offering a "best of both worlds" balance of low drag and superior protection for gear teeth.

For transfer cases and rear ends, use Redline Heavyweight Shockproof ONLY. It is especially important to use only Redline Heavyweight Shockproof fluid or Mitsubishi dealer t-case fluid in EVO transfer cases. DO NOT use Synchromesh, BG Synchroshift I or II, or Royal Purple. These fluids will destroy synchros and gears and void your warranty!

EVO T-cases The recommended fluid for stock to mid horsepower level street cars is the OEM DIAQUEEN Mitsubishi part# 3775610. For high horsepower and/or drag use, we recommend running Redline Heavyweight ShockProof(Red).


If you are purchasing one of our rebuild services, e-mail us at sales@jackstransmissions for a discount on Redline gear oil.

Hello You!

Enter your email address for stock alerts, discounts, promotions and more!