brass button clutch - why cant i down shift?

[nd55]

Hey,

I might be a voice of caution here and say slippery-er gear oil will not help with shifts.

The brass synchro's need some friction to rev match.

There has been a huge debate on d-series.org (I think) on this.

I think OEM (or equivalent) is best.

[SeverAMV]

Hey,

I might be a voice of caution here and say slippery-er gear oil will not help with shifts.

The brass synchro's need some friction to rev match.

There has been a huge debate on d-series.org (I think) on this.

I think OEM (or equivalent) is best.

redline oil isnt slippery-er. not sure how its made, but its kinda like castrol magnetec motor oil, it coats the gears entirely so the gears are never really in contact with eachother, thus reducing the crunch. and its a low viscosity oil, so more power is transferred.
that and i hate the factory gearbox oil, it keeps corroding my synchros for some reason.

[nd55]

i hate the factory gearbox oil, it keeps corroding my synchros for some reason.

Huh???


Never heard of this before. You using the right stuff?

Civics use light weight oil (less than EP4 grade, but I'm really not sure).

Early EP5 gear oil used a sulfur compound to add the shockproof qualities to the oil, but this had a known corrosion effect on yellow metals.

Later EP5 gear oil solved this, I believe.

You actually seen the pitting on the synchros?

Something sounds wrong to me.

Nick.

[SeverAMV]

Huh???


Never heard of this before. You using the right stuff?

Civics use light weight oil (less than EP4 grade, but I'm really not sure).

Early EP5 gear oil used a sulfur compound to add the shockproof qualities to the oil, but this had a known corrosion effect on yellow metals.

Later EP5 gear oil solved this, I believe.

You actually seen the pitting on the synchros?

Something sounds wrong to me.

Nick.

yeah, seen it and felt it for myself. i prefer redline oil now, feels much better.

[flipstar]

yea my bro got a 5 puck plate as well shudders on down shift but all i do is pull the clutch out like im gonna ride it on take off and there isnt anything to it no shudders but its got a vicious bite if u jus pull it out quickly on up or down shifts

[Topendwarrior]

If it was a decent brand clutch and fitted with new or machined flywheel and correct installation precedures, then you really shouldn't have to worry about how it behaves on upshift or downshift. Its all a matter of using the right foot techniques and getting use to the clutch.
With new clutches, is important to know that initial bedding period is crucial and you need to treat it properly so it beds in properly.