Diff cooler? LMAO! No way never in a million years would we need that in our cars, save the loot and put it elsewhere in the vehicle. I have been running 4.10's for 10 plus years now with NO real significant more then normal breakdown of the gear oil.
I think you might have missed something in my post; either that or I wasn't clear enough.
I suppose I wasn't clear enough... Cobra R cars don't see drag duty; they see plenty of autocross, GT class and modified GT class racing. This is what I was referring to when I made mention of driving their cars hard.
What you've got at work here is elevated diff temps due to the gearing and hard use which, just like in a transmission will burn up your limited slip diff (this correlation is due to both using friction materials/plates).
This issue at hand is not burning the fluid and breaking it down (although, when going higher than 4.10's with an IRS, you are approaching this issue)... the issue is the early demise of the limited slip. Fortunately, drag duty isn't nearly as rough on a diff as a track with twisties.
Again, as stated before... if you drive your car hard (that means truly drive it, not accelerate in a straight line).
To illustrate my point, although the application is rather different, the parts are all the same. I put 4.10's in my F-150 with an eaton E-locker in the rear and the Tracloc from the rear, rebuild and put in the front. I'm going to be pulling my front diff and replacing the tracloc with an auburn Elect'ed (limited slip electric locker). Why? Well for the obvious benefit of having a locker front and rear... while still being able to run limited slip/open for duty in the white puffy stuff. BUT, had my tracloc not BURNT UP in the front diff, I'd leave well enough alone. Of course, my 35" tires help to hurry along the destruction, but unlike a rear diff, the front diff only sees duty when the conditions are as such where traction is limited (otherwise, one axle disconnects from the diff and then both free-spool). So with this example, you can see how when really used hard, a diff cooler is almost a requirement. I'll also be installing one when I put in the Auburn diff (as mentioned before, in the spring).
How many of you really drive your Mark hard... I don't know. When I get a mark, I'd like to autocross it; granted I'll have to do plenty of structural reinforcement, but that's the goal; to spank on guys in much smaller, agile cars with an "old man's Lincoln". And you can bet she'll get a diff cooler...
the first thing i would like to ask is if somone could give me a nice parts list of what i would need to swap a cobra intake in to a gen 1 and how much moeny it would cost in total about . the seconed thing i was wondering is what gears would be best for a mark running a t56,kooks header 2.5 inch all the way down and a cobra intake? and what 1/4 mile times am i looking at with all those mods high 13 low 14 maybe?
