I've used the Heavy in my Alphas on my Formula for years- never a problem- recommended by RedLine. Very good lube!

I think everyone sells it for the same rice right around $8/qt
if you go to www.racerwholesale.com you can get 10% off if you buy a case....thats about the only discount i have found on it anywhere..

We run the "Heavy" in our IMCO SC's...so far so good!

I use the Shockproof heavy in my XZ drive. What I noticed first about it, was it shifted in and out of gear easier. I bought it at www.myoilshop.com. It is priced at $7.75 a quart.

Mike

cap, What they said. Heavy
Shifts really good compared to the Mrec stuff.

Mike, Whaaaatsupp, How was the snowmobile trip?

When I bought my Imco SC I asked what drive oil to use. The man himself said none of it is bad. In our race boat we were using the Red stuff and it worked good but wasn't working at because of the higher rpm the boat was turning. We switched to Torco and it has been working for us.
From what I have been told??? that's what is in the #6 drive from Mercury????

http://www.beckracing.com/torco_oil.htm
http://www.torcoracingoils.com/assets/frames2.htm

Give them a call and hear their story. Just one more to add to the confusion list.

It literally smells horrible. It works great, but stinks!!

Amsoil motor oil smells pretty good and racing fuel smells great, but Red Line gear lube stinks!!

OH GOD! I love the smell of Cam 2 racing fuel

Shockproof is a GL5 lube with about 3% limited slip additive. It's useful in systems with hypoid gearsets calling for up to 140 weight mineral oil. Heavy is what you want to use in a noncompetitive application. The Light's are for applications where minimum drag is required and durability is not an issue. E.g., racing applications where teardowns are frequent. It's called Shockproof because the calcium base provides some amount of shock loading relief. So, the impression that an outdrive shifts with less engagement shock makes sense. I'm going to put this into my outdrives but have a problem, no available hydro hoist at the moment. So, no access to any drain plugs in the water.

Question: can anyone tell me if the OD fluid is circulated via the engine bay reservoir? If so, I intend to change it the same as power steering fluid. Remove the return line and route it to a collection point, engage the drive, and fill the reservoir with the new fluid until the exiting fluid changes color.