[Fot] Differential gear oil?

[Greg And Alison Blake]

I use the Costal GL4 from NAPA and change it every 2 race weekends in the TR3. This is a welded diff so not as much heat as an open diff or one of those fancy limited slips. Works great and about $30/gal. 

I tried using this in the WRL endurance TR6 last month. In hour 6, we boiled the fluid right out of the diff and melted the poly mounts. This was a stock open diff. Most of the endurance racers I spoke to said that they use full synthetic in their endurance diffs due to the prolonged heat. 

I will continue using Costal in the 3, but will only use full synthetic from now on for endurance events.  We lost about 3 of seat time due to that failure. Well worth the extra cost of synthetic. Not to mention all those bearings and damn side seals that have to be replaced now. What a pain.  

Greg





> On Jun 18, 2015, at 1:08 PM, Bud R <levilevi at comcast.net> wrote:
> 
> So Redline shock proof “light” gear oil is what I’m leaning to use in the refurbished diff I’m putting in the race car.
> 
> What do others use?
> 
> Thanks
> Bud Rolofson
> 
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