kyoo

iTrader: (29)

if I had to guess, probably around 3k miles, with the diff fluid changed at least 5 times during that interval. I guess I should wait for the metal to settle down before I make any visual judgment of which fluid does better?

LetsGetThisDone

iTrader: (1)

Yea, 3k miles isn't quite really fully there yet. But you should at east be seeing less metal each time you pull the plug at same mileage intervals. My Shep rear diff is just a new oem ring and pinion and it took 2500 miles to stop making a decent amount of metal. When the gear is shot peened like TRE does, it takes longer to wear in because the gear has to knock the high spots created by shot peening. That's why Jon is so adamant about his break in procedure for the first 500 miles. The gear is susceptible to damage if its over loaded when fresh due to the high spots from shot peening reducing the contact surface area. When my diff had a TRE gear in it, it took about 5-6k for the metal making to calm down IIRC.

kyoo

iTrader: (29)

got it, good to know.

also, the cusco diff is very, very aggressive. in parking lot turns I remember it would BANG and the car would shake from it lol. or if I were exiting entering parking lots that had high/uneven ramps, the inside tire would easily spin. I don't know what that would translate to if I were on grippier tires, I guess more banging.

I keep coming back to lightweight shockproof every time. it still just sounds to me like the best available for t-case (maybe shockproof heavy) and rear diff. idk. I just don't know! lol.

LetsGetThisDone

iTrader: (1)

I think you're over thinking it lol. I don't have experience with LW shock proof.

kyoo

iTrader: (29)

truth... I did have a transmission and t-case fail oh so long ago, and my rear diff was apparently way out of spec when rebuilt, but that was after 5 years of use and it still felt great.

I think the trans (5spd) actually had shockproof in it, t-case I was told failed but i'll never really know I guess. I was pushing a lot more torque back then too, but with amsoil severe gear.

will send some pure samples in tonight to be tested. i'll even crack open the unopened bottles

LetsGetThisDone

iTrader: (1)

Did it fail, or did Jon just not want to use the gear? Once the gear has a solid, thoroughly run in, wear/contact pattern on it, its not so advisable to move the contact pattern around (to get the pattern he wants to see) since the old contact pattern is so thoroughly worn in to the gear. If you try to adjust it, it will just make noise and fail in short order. I have a feeling that's what happened, and that's why Jon put a new gear in it.


Shock proof killed your trans lol

kyoo

iTrader: (29)

was stock and failed, though I never had any indication that it did.. this was way back before I ever worked on my own cars, and the shop just told me it had. Shep actually rebuild the trans and the t-case at the time. rear diff never failed. transmission was all messed up though lmao none of the gears made sense. that was probably the shockproof yeah, around 10yrs ago or so

kyoo

iTrader: (29)

got my samples packed up and ready to go out - no redline yet, will get it soon. man, sae90 is thick when cold

kyoo

iTrader: (29)

long awaited results of the oil analysis! interestingly, diaqueen has higher contents of boron and phosphorous. the viscosity at 100c is a little thicker - but i put in a special request - test it at 140c (284F), an "overheating" situation. the severe gear is a little thicker, meaning it's more stable and provides more protection at hotter temps, though at that point you may be in some trouble anyway.





thoughts??

i will test redline later when i get it

LetsGetThisDone

iTrader: (1)

By those tests, I would run diaqueen over the severe gear.

I haven't had time to get sample outs yet.

Pal215

iTrader: (12)

Thank you for posting those results ! Finally we have ourselves a real analysis of Mitsu diaqueen SAE 90.

I've only ever used it.

-pal215

RazorLab

iTrader: (8)

I used Redline Shockproof heavy in my 05 Evo with ACD for 6X,XXX miles, a billion track days and fun trips to the snow in temps down to 5F.

I went through two six speeds (one built!) but the transfer case never skipped a beat.

I sold the car a couple years ago and as far as I know the transfer case is still going strong.

That said I'm doing OEM oils in my evo 10 this time around.

kyoo

iTrader: (29)

interesting.. I'd run it if I lived in Cali.. but I've got the Midwest to deal with, which is why I was thinking lightweight

kyoo

iTrader: (29)

also, if anyone is willing to test diaqueen at 40c, would be interesting to see

LetsGetThisDone

iTrader: (1)

I just ordered 6 test kits. I'll probably send them out after the trackday on 2/28. Going to send used diaqueen from the tcase(500-700 miles plus track day), virgin amsoil severe gear 75w140, virgin amsoil sever gear 250w, and virgin RL heavy shock proof if I have it. I'll send used motor oil too, Amsoil SSO 5w50. It'll have about 1k miles plus the track day on it.