[Fot] Quaiffe Versus Gripper -

[Greg Hilyer]

Fascinating and accurate run down Tony.
Since I sent you a personal congrats a few hours ago I’ve been mentally reminiscing about when you graciously let me drive the Red Rocket in the RA enduro years ago.
Remember when I went out for practice and came in after a lap or two and told you about the banging I heard coming out of corners?
With helmet on and car running you explained I was only hearing the Detroit Locker engaging, said “don’t worry about it” and sent me back out. I had never used a DL in anything but a straight line and although I found the noise a bit disconcerting, I took your advice. Sure didn’t want to )and didn’t) break a borrowed car but boy was that fun! 
Congratulations again and all the best.
Greg “ Lunker” Hilyer
Albuquerque NM

> On Jul 20, 2023, at 10:52 PM, Tony Drews via Fot <fot at autox.team.net> wrote:
> 
> Can't keep my mouth shut on this one, lots of great advice so far.
> 
> Jack ran welded diff in TR-3 back in the day, he reported push unless he kicked the tail out.  Taught him bad habits he had to unlearn when he went to a formula vee where smoothness rules. When he built his TR-4 he did the Quaiffe diff so I have experience with that one.
> 
> The three main LSD's are
> 
> Gear type (Quaiffe), clutch type (Gripper / Salisbury), detroit locker, I guess also viscous coupling but I'm going to ignore that one.  This would be like a Nissan or Subaru LSD probably.
> 
> As mentioned, the gear type diffs reward smooth driving.  If you lift an inside rear wheel, it WILL spin and you will lose some but not all of your drive (open diff you lose all).  In Jack's car, I suffered from that but Jack didn't after learning to be smooth in the FV.  Forced me to pat attention to smoothness.  Gear type diffs are pretty bullet proof, they rely on some creative use of worm drive gears as I understand it.  If both wheels are on the ground, it will transfer torque to both properly and not spin the inside tire.  Overheating doesn't appear an issue.  There are very smooth in engagement - can't feel it.
> 
> Clutch type have many adjustment options if you choose to use them.  They require some care in what lubrication you use since they are using clutches in an oil bath.  The clutches can wear over time so there is some maintenance needed.  They can also produce heat when being actively used, that can be an issue in longer events.  They can keep an inside wheel from spinning when off the ground.  They are progressive in takeup.
> 
> Detroit Locker is not generally available in the TR diffs, they are rare in the big TR's, not sure if they are even available in GT-6 / spit.  They act like an open diff on corner entry so no push but act like a welded diff on power on exit of turns.  They are mechanical, reliable and not sensitive to which lube you're using.  This is the one that fits MY driving style.  You can feel them engage at times - I don't notice while racing but do notice it in the rain or when pussy footing around.  Would be horrible on the street I'd think.
> 
> Cheers, Tony Drews
> 
>> On 7/20/2023 10:44 AM, Scott Janzen via Fot wrote:
>> Does anyone have experience with a Gripper diff - or a Quaiffe?  I currently run a welded diff in the GT6 and am contemplating whether any advantage could be gained by making a swap.  Certainly curious as to what the super fast GT6s at the Kastner Cup were running.
>> 
>> Scott Janzen
>> '68 GT6
>> 
>> 
>> 
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