I am slowly working my way through the entire thread, but I have some questions.

Would the 1 way or the 1.5 way be more beneficial to street driving (with snow {and occasional snow hooning}) which would be the more beneficial set up? The car is my DD and although PA has had the warmest, least snowiest winters in a long time but i dont want to have to fight oversteer IF snow becomes a thing once again.

I have seen multiple discussions that shep/TRE are almost identical, except for that TRE has some additional steps that could make a difference. Has that changed?

My car will soon be at about 400hp, (needs a re-tune, see
{https://www.evolutionm.net/forums/evo-dyno-tuning-results/737001-bbk-full-sd-stock-mani-cosworth-cams-stock-bottom-end-etc-93-a.html}
if you want more information) how many plates should I have if i plan on drag racing the car?

Which fluid/diff combo would make less noise? (I do not like the idea of consistent bangs and pops in my only car)

 

Even for my build which is track oriented, Jon from TRE told me a 1 way is the route to go. Lockup on decel and braking could contribute to under-steer.

I think for tarmac a 1 way is what you want. Dirt or snow a 1.5 or 2 way would be ideal.

 

Alright well then 1 way it is. If i want to keep going up in power (Car will probably stay around 400 for a while, but I dont want problems). A couple of my friends are starting to AutoX their cars too so I thats also a future possibility. Would I want more plates or less?

Would the TRE or the Shep be louder? Is the whine similar to high speed differential whine you hear in Lamborghinis and such? What fluid and diff combo is considered the best?

 

Are you sure it's 80w140 LS? Redline makes an 80W140 oil but it's not Lightweight Shockproof.

Alternatively, I can find 75W140 Lightweight Shockproof.

 

interesting - the diff upgrade he offers is still 1.5 way isn't it?

The flip side is the 1.5 way offers more stability in straight line decal/braking. "drivetrain" understeer for me is managed via the ACD tune

 

Yea thats what I was thinking. And couldnt i just get a custom amount of locking for deceleration just because I am worried about what would happen with a 1 way on ice.

 

For road racing, Jon has never told me to run GL5 75w140NS in my trans. That fluid spec is for a max effort high power car. Not needed in a more reasonable road course build. My trans has been happy with redline or amsoil MT90 (75w90) trans fluid.


Limited slip ifferentials don't cause whine, gears do. Typically, when you hear drivetrain whine in those lambo's, its the straight cut gears in the transmissions. If a hypoind gear is whining, its going to blow up.


Jon recommends either 80w140 or 75w140 redline to the rear diff and tcase. He doesn't really recommend shock proof except for drag racing.

 

You can "order" either way. I took his recommendation and did a 1 way which I believe is also the default.

 

Does anyone know what the Max-Lock is considered as?

 

That's what we are discussing. I have a 12plate max lock. Its a 1 way. It can be ordered as a 1.5 way as well.

 

https://www.teamrip.com/EVOLUTION%20...20SERVICE.html

"1-way, 1.5-way and 2-way options are available by request"

 

a 12 plate clutch pack upgrade to the stock LSD. It uses higher quality plates than the Weir kit. Jon also re-profiles the engagement ramp that cross shaft rides up on to engage the clutch packs.

 

Are there any real downsides to this modification? NVH makes sense, but specifically for preformance driving (including drag racing and such). How bad is it in slipping environments (i.e. a couple inches of snow)?

 

Well I know that, I have one. I just wasn't sure what was considered standard. How the Max-Lock came without specifying 1 way, 1.5 way, or 2 way.

 

that's an interesting question - I cant think of a single downside honestly. my diff (cusco) is definitely more violent than most (used to bang in parking lots until I started running red line's gear oil), but honestly that didn't even really bother me. It does make the car feel like a RWD car in the snow to a degree, but honestly that doesn't really even bother me - it's pretty fun in fact.

It's probably a 1.5 way, I think that is standard. the "JDM" rear diff for Evo RS's that didn't get the AYC was a 1.5 way rear diff, FYI.