Heavyweight Shockproof in temps under 45 degrees?

[Dark_Horse]

I'm reading different advice on whether it's okay to use Heavyweight Shockproof in the t-case & rear diff when temps get below 45 degrees. Since I'll be driving the car in the winter, is Heavyweight Shockproof ok to use in temps below 45 degrees, or should I use something thinner?

Thanks

[rodent]

I would not use it in the cold.

REDLINE SHOCKPROOF HEAVY- If the vehicle is going to be drag raced Redline Shockproof Heavy is an excellent oil for the transfer case but make sure temps are 45*F or warmer because the oil is not thin enough for cold weather use.

[Dark_Horse]

I read that on the TRE site, however, Jack recommends only heavyweight shockproof, so I was unsure what to think.

I'll probably go with light shockproof.

[sbiggi]

Been running it for 7 years in the trasfercase and rear end, the two driveline parts I've yet to blow up.

[TerryLiv]

+1

Terry

[Mirage]

Always used heavyweight in the rear diff and T-case as well. I'll never use anything different. It just works.

Cold temperatures you can notice it is a LOT more viscous. I personally wouldn't race on it in cold weather, but you should be warming up the car anyway for higher power output. This includes the transmission and driveline.

Marcus

[Dark_Horse]

For those of you that run it year round - do you drive to/from the ski areas in below zero temps? My car is mostly stock - minus an E16G and EVO injectors, so I'm not much above stock power output.

[BlueVelocity]

I have. Although, keep in mind there's usually snow on the ground so power output and traction are a minimum.

I've also used it many times on the colder track days and events. It just needs a little warm up time.

[TerryLiv]

That stuff is so viscous that it stays on any surface it lands on no matter what the temperature.

Terry

[Mirage]

That stuff is so viscous that it stays on any surface it lands on no matter what the temperature.

Terry

This is true.

I have a center welded differential sitting on my shelf that I never wiped off when I set it there. It's still completely and evenly covered in blue goo (Shockproof lightweight) from 7+ years ago.

Try that gear oil. :D

In colder temperatures, I'd just give it sufficient time to warm up before laying down any serious power. Daily driving in sub-zero temps never was an issue with shockproof as the fluid doesn't lose it's lubrication properties, but is only MUCH more hesitant to be slung around inside the cases.

I did however notice a drop in fuel mileage in the winter months. Read into that how you want. :p

Marcus

[Dark_Horse]

Thanks for the replies. I think I'm going to pick up some lightweight shockproof. I figure that there's no reason to run the heavy stuff since I'm not making much power.