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FWIW, Grice/Berry had probably thousands of ProSolo launches on their Cusco front diff with no breakage. When they ditched the ACD they had to get rid of it (not interchangeable).
Also, my 1way front diff is NOT Silent. Im the guy you hear pulling out of grid spots with what sounds like a locker diff clunking along. But on course, its fricken magic.
i had rampant banging in my ats until really the first track day it finally quieted down. did you get the 450f or the 450c? i'm sure that's a setup thing too though, probably don't need more than 60% lockup on street tires
so.... major bummer: i guess 2 other people with very similar usages to me have blown/cracked their ATS front differential housings, also taking the t-case with it.
is this related to the TC breaking off mounting/bolts and spinning? I saw one of those at a local race shop FB posts not too long ago
yea so i've seen the new/case housing and it is much, much sturdier. That said, I'm not paying $1,400 for the gd thing. They sold a part that's either janky or has a major design/flaw weakness (seems this happens to everyone running one of these diffs) - or, I just go with a Cusco which has proven bulletproof reliable, and sell the ATS at a loss. It's weird that it even broke where it did, didn't think that area even saw much force.
yea so i've seen the new/case housing and it is much, much sturdier. That said, I'm not paying $1,400 for the gd thing. They sold a part that's either janky or has a major design/flaw weakness (seems this happens to everyone running one of these diffs) - or, I just go with a Cusco which has proven bulletproof reliable, and sell the ATS at a loss. It's weird that it even broke where it did, didn't think that area even saw much force.
very odd indeed. almost look like something on the acd/passenger side was locking
SPAL fan (30100375) with OE-ish shroud
has anyone's slim fan die yet? this thing is so light, doesn't seem heavy duty. how many years/miles do you plan keep a unit before just swapping for a new one?
I'm trying to see if I can set things up so its easier to drain water-coolant
very odd indeed. almost look like something on the acd/passenger side was locking
i think we've come across a potential reason, but still doing some digging on this. i think the diff is still viable for track days, even in old form that i currently have, but will prob switch to the cusco for reliability for autox launches. prob need a t-case refresh anyway
should i have my local mechanic take out the t-case on my evo? i say "local" but still really legit. is there anything "special" about the evo t-case that you wouldnt encounter on another 4wd car?
Diff swap would likely be easier with it out of the car. The only thing he may not be familiar with is that the driver side stub shaft needs to be removed from the transmission in order to separate the tcase from the trans.
Speaking of diffs... covid self isolation and working from home finally gave me some time to finish the diff pinion bearing preload tool (measurement of bearing rolling tq).. works with the transfer pinion too with an adapter... will make adapters for the various diffs too.
