C5x Gearbox Oil - what has worked well for you?

[gmacrae]

Just wanting some opinions on what oils you've used in these gearboxes in your corollas and levins etc and how well they worked in taming the notchiness down. Also, please say if yours has an lsd and how it liked the oil.

I had castrol syntrax 75w90 in my ae92 c52, worked well and made the tired gearbox drive pretty nice, esp once warm. I've just put some valvoline semi syn 75w90 in the c56 that came with my silvertop and its either really shit oil (not likely) or the 2nd and 3rd synchros are completely buggered - oh well. It drove shocking with the oil that came in it also, just looked to be a dino gear oil.

Opinions please

Gene

[dotdog]

Im running trd lsd oil in my c52 which has a trd lsd fitted. It really didnt help the crunchy 2nd and 3rd but its made the lsd a whole lot nicer to drive!

[Elmendorf]

Running redline in my C52/56 combination box with TRD LSD and have absolutely no issues with crunching gears or notchiness.

[Ae92typeX]

in my last c series ox I ran Valvoline 75w90. No complaints.

[DexGT]

I'm running Redline in my C52 with TRD LSD in it , very happy with it

[AceSniper]

what grade redline are you guys using?

[Elmendorf]

I'm using 75w90ns with no friction modifiers

[deaf_rattle]

im running auto trans fluid in mine, seems alot nicer than it was before. no notchy action now.

[tatsumaki]

Fluid is often not the main issue related to difficult shifting in the C5# type boxes. Toyota never had good cones in them to start with.

Harlet: The cones were upgraded in yours when the transaxle was put together.

Paul.

[gmacrae]

Yea i understand they're a pretty notchy gearbox to start with, but using syntrax in my old gearbox did make a difference.

Paul, by cones you mean synchros right? Im getting a gearbox rebuilt (blacktop c56), what synchros should go into it? Are the new toyota ones different to the originals or is there a trick to know?

Cheers man

Gene

[pc]

I'm using syntrax in my TRD LSD C50. No friction modifier and it seems fine.

[QikStarlie]

sycnro's in blacktop box should be good the good ones. its the older c52 boxes that have the issues

ive tryed allsorts in my gearboxes, has vmx in it now, works fine. has trd lsd as well.

[Dragger_Dan]

Using a vavoline at the moment... but the diff shudders like hell when I go round corners. Seems to get worse when the car's warmed up.

Moral of the story... use fluid made for LSDs when you do have one. This was only used as a temporary measure to get the car drivable and I don't want to think what it could be doing to the diff right now.

[tatsumaki]

What ppl also need to understand is a mechanical lsd (clutch type) especially will make a bit of noise. All it means is the diff is doing it's job. It doesn't mean there's necessarily a problem.

Same thing goes for dogbox gearset. If it's whining whilst in gear (which they do), it's all good because the gears are straight cut and no synchros are used. The dog set is doing it's job.

Many other things come into the equation too: ramp-rate, preload, plates (number of) and so forth. All these effect the performance of the LSD.

Friction modifier should really only be used during the "break-in period" of the LSD. Prolonged use of Friction Modifier often results in glazing of the cones in Toyota transaxles.

Paul.