Because of the high RPM's would Red Line Shockproof be better for Diff?
 

I was ready to buy 75W90 gear oil until I read the descriptions on uses. Was wondering if anyone knows about Red Line Shockproof?


75W90 Gear Oil - the preferred product in nearly all car and light truck differentials, both conventional and limited-slip. 75W90 is preferred for most racing applications. It contains friction modifier which is recommended for limited-slip units. 75W90 Gear Oil can be used in many transmissions and transaxles; however, other Red Line lubricants have better frictional properties for rapid synchronization. Exceeds API GL-5.

This fluid is recomend for the competive frequent track goers that don't mind frequent diff fluid changes. We recomend changing this fluid every 6-7000 miles

The lighter fluid will allow for less drivetrain power loss, but requires more frequent changes. For cars doing a lot of high rpmlaunching, diff abuse or wanting longer change intervals we recomend the Red Line Heavyduty Shockproof Oil.




SHOCKPROOF™ GEAR OIL - recommended for heavily -loaded racing differentials and transmissions which see shock-loading. ShockProof contains a unique solid dispersion which cushions gear teeth to help prevent tooth breakage and allows the use of lower viscosities. Available as SuperLight, LightWeight, and Heavy grades.

Red Line Synthetic ShockProof TM 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 ShockProofTM chemistry significantly reduces the thinning effect of high-temperatures.

do you work for redline?
no offense, but you sound like a commercial

i drive like a maniac, and have been known to frequent tracks and canyons. i say that redline 75w90 is just fine. hell, even the 75w90 is expensive as hell, i'd hate to imagine what this improved oil would cost me. i change all my dif, tranny, etc fluids every 10k miles. it friggin costs me around a hundred bucks each time. i gotta learn to drive like regular ppl.

no don't work for Red Line just good at cutting and pasting.:)

When You say "because of the High RPMs" do you mean Engine RPM? Engine RPM has nothing do with the Differential beacuse it is after the tranny. At 30 MPH The Diff is spinng the same if you are in 1st at redline or lugging the engine in 4th.

ya I kinda thought about that after I wrote it...but alas is was too late. I still would like to know if anyone has used the other diff fluid it is about the same price.

I talked with RL and they said to wait on the SP until the warranty was up as it does not meet the requirements.

That being said I run the SP SL in our CSP Miata in both the trans and the dif.

Vince