Redline Heavy ShockProof in the Winter

[xsports33]

How do you guys feel about running RL Heavy ShockProof gear oil in the read diff during winter. I just moved from San Diego to Chicago so i never really thought about it before. But now that i experience "real" winters with
Their website says it acts like a 75W-250, but has fluid friction like 75w-90. If it's in a fluid state like 75w-90, i think i'm ok.

 

[OneEyeJack]

Call Red Line and ask Dave in tech help.

 

[webfors]

Ask Redline. I personally wouldn't run Heavyweight Shock Proof in my diff in any climate. Your application might be different. What does your car/truck spec'd for?

 

[Ben99GT]

Apparently Shockproof has some gelling concerns in low temps, but I'm not sure what temperature gelling becomes a concern.

 

[dailydriver]

Yes, I wonder if they add polymers to get that '250 weight-like' ring and pinion 'cushioning' effect, or if it is done exclusively with ester base stock blends??

I would not run it in the (VERY COLD locale) winter, regardless.

 

[unDummy]

And, your reason for even running Shockproof?

A VOA/UOA from years ago showed shockproof in the 20k+ range for calcium. So, its using seriously overdosed ca for the 'cushion'.

 

[xsports33]

I'm running Shockproof because of the heavy loads my rig sees:

2006 Silverado 5.3L HO 4x4. Magnacharger on top with supporting mods (LTs, heads, cam, etc), 90mm TB, 6" lift, 35" tires, 4.56 gears, blah blah...

Plus I got a 6K boat or my toy hauler.

 

[[RT] ProjUltraZ]

i've seen heavy shockproof coming out of the bottle in warm temps, and its thicker than 80w90 conventional

 

[dailydriver]

Originally Posted By: unDummy
A VOA/UOA from years ago showed shockproof in the 20k+ range for calcium. So, its using seriously overdosed ca for the 'cushion'.



Thanks for that info, I was wondering how they did that!