[Fot] Diff lube

[Greg Blake]

It’s the sliding of the hypoid gears across each other along with the normal surface meshing of gears that requires the EP package. As I understand limited slips, certain types require other friction additives to work properly, but I have not ever paid attention to that since I just weld my carriers.  No slipping happening in there. 

Sent from my iPhone

> On Aug 15, 2019, at 8:20 AM, fubog1 <fubog1 at aol.com> wrote:
> 
> 
> lacking the EP additives required for hypoid gears used in differentials. 
> This has always been my biggest concern, but I don't do LSDs... (well except for maybe a couple hits back in the early 70s...)
> Glen
> 
> 
> -----Original Message-----
> From: Greg Blake via Fot <fot at autox.team.net>
> To: Fot <fot at autox.team.net>
> Sent: Thu, Aug 15, 2019 7:12 am
> Subject: Re: [Fot] Diff lube
> 
> Any Redline MT or MTL fluid is designed for transmissions and is lacking the EP additives required for hypoid gears used in differentials. 
> 
> I had been using MTL in my racing diff for 7 years without a problem. This was with a gear set that likely had 50,000+ street miles on them so were well broken in. 
> 
> last year when I built a new diff with a new gear set, things did not go well. I used MTL and destroyed the gears in about 20 laps. The gears actually melted. The only conclusion I could draw was that I did not have the EP additive package required for hypoid gears during the critical break in period for the new gears. 
> 
> I now use the redline shock proof which does have the EP additives. Works like a champ.  I have a welded diff. 
> 
> Greg
> 
> Sent from my iPhone
> 
>> On Aug 15, 2019, at 5:21 AM, Chris Marx via Fot <fot at autox.team.net> wrote:
>> 
> 
> I use Liqui Moly (GL5) LS SAE 75W-140 4421 in all race cars.
> I had put in my LSD to the TR4 in year 2010 and it still looks like new which I blame to the oil.
> Trouble free stuff.
> I use it also on  the TR8 and it works great…also trouble free yet, with more than the double torque and power on it.
>  
> Cheers
> Chris
>  
>  
> Von: Fot <fot-bounces at autox.team.net> Im Auftrag von kkjjk--- via Fot
> Gesendet: Mittwoch, 14. August 2019 20:45
> An: fot at autox.team.net; kkjjk at aol.com
> Betreff: [Fot] Diff lube
>  
> To all FOT guys (and gals)-  Can you tell me what type of rear diff lube you are using with a Quaife LSD set up?-  Otherwise stock GT6 rear.  I was using Redline Light Weight Shockproof oil but I have heard that's not good.   Thanks!- Jay De Pol
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