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Red Line LightWeight ShockProof Gear Oil 1QT (Part Number: )
Red Line LightWeight ShockProof Gear Oil 1QT (Part Number: )
Red Line LightWeight ShockProof Gear Oil 1QT
Read 9 Reviews | 5 Q&As
Part # 58404

In stock! Ships same day
Universal part

Features & Product Details

Red Line is one of the most trusted and pioneering companies when it comes to performance and racing lubrication. Their LightWeight ShockProof gear oil has been designed to offer the most protection in your transmission by having potent viscosity characteristics that provide a greater film thickness that is also light which gives you a great balance of low drag, and superior protection.  

The Red Line LightWeight Shock Proof gear oil is designed to handle racing transmissions, as well as transaxles that see continuous loads. It has an excellent low temperature flow which allows easier shifting in colder temperatures.  Similar to a 75W-140 gear oil, but with the lower internal friction of an SAE 30 motor oil.

Sold individually in a 1-quart container. 


Brand: Red Line
Class: Not supplied
Friction Modifier: No
Type: Synthetic
Volume: 1 qt
Color: Blue
Mfgr. Warranty: No Warranty
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.



9 Reviews
5 out of 5 Stars
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
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09 WRX 4 years ago
5out of 5stars

I waited until 77k to change tranny and rear diff. The product is great, I should have used it sooner. This with a little motul! If you are questioning getting it, don't anymore. Order it ASAP, you won't be disappointed. RSD was great as always with shipping and service.
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Great Product 4 years ago
5out of 5stars

Changed my transmission / front differential out with this - great improvement in feel and sound, car is much happier and feels like it has more lubrication.
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Like It 5 years ago
5out of 5stars

I was having trouble shifting into reverse unless i let the car roll back one quart of this mixed with Motul 75w-90 gear oil solved the problem. I don't see any difference in shifts after the oil change (as far as smoother shifting, but it solved my main concern and as always great customer support from the RSD team!
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Great Mix 5 years ago
5out of 5stars

I put in my 02wrx 5 speed 3 qts of this Redline and 1 qt of the Motul. Works great and feels smoother. This with a stage 2 makes the difference!
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BLUE PEPTOBISMO!!!  6 years ago
5out of 5stars

Its like blue peptobismo lol but texture and liquid construction is very useful.
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  • Q: Mixing Redline Shockproof w/ Subaru Extra-S  ViperSTi4 years ago

    Can you mix the two? If so, would it help with a synchro issue? I am running only on Extra-S and it helped the Synchros greatly, but there is still a slight grind into the STi 6-speed 3rd gear. 4th gear mid/high rpm grind is completely gone.
    • 0 of 0 people found the following answer helpful

      A:  It is very common to mix this fluid with other gear oils, but we have not tried mixing with Extra-S. It should not be a problem to use both together, but we cannot guarantee that.

      Zach G. @ RallySport Direct 4 years ago  
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  • Q: Is it safe?  tcwedge93473326 years ago

    So do I just buy 4qts and just change the tranny fluid, refilling with this? Is it safe for my tranny? Are there any downsides or is it just regular ol tranny fluid with some benefits?
    • 0 of 0 people found the following answer helpful

      A:  Redline doesn't show it recommend for subauru applications, But we have seen some guys use it, This is very thick fluid.

      Kyle A. @ RallySport Direct 6 years ago  
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  • Q: .  nmc920302737 years ago

    is this fluid more likely to perform well in a 5mt than a 6spd? i've only read horror stories on iwsti, but OTOH only good things on lgt and would you suggest the mix of 3/1 shockproof/motul300 in my lgt?
    • 0 of 0 people found the following answer helpful

      A:  We typically suggest to stay away from mixing fluid manufactures, reason being that different manufactures use different chemicals which can react and become acidic or corrosive. So you will want to stay with the same manufacture of fluids and not be mixing them.

      Kirill C. @ RallySport Direct 7 years ago  
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This Part Fits

Universal Product
This item is non application specific.
Please verify compatibility before purchase. May require some modification for proper installation.