I know it's been done to death and yes I can search and yes I have searched but it's pretty quiet around here thought I would just make another thread to liven things up and get some new responses if anyone had any.

Was wanting to change out the gear oil to Redline MT90 and get some 75W90 for the diff, mainly to solve some notchy gear issues and try as I may the dreaded 1-2 at high RPMs.

Has anyone had any success at all? Or is it just a waste of $100?

 

I tried it and did not see an improvement . Have just bought some Redline lightweight shockproof gear oil as a few here have had some success with that for track use and it is still fine for Daily driving .

 

I've just changed to Royal Purple in gearbox and diff.

I don't know whether it is a placebo effect or not but the shift action seems to be a bit smoother when warmed up.

Probably worth changing the oil in both casings anyway - most discover some crap in their gearbox oil from all reports. Mine was definitely on the way out by the look of it. And if you're doing it, you may as well get some good stuff in there.

 

I quite liked the redline but i didnt seem to last more than 1 track day. I have been using Royal Purple as the 1st time it lasted me a lot better. However neither seem to have solved my issues with notchy gearbox. I am going to try the line of bent forks and less than perfet syncros on pre 05 cars with my dealer and see how I go.

All in all, unless you are going to track, I would say try the castrol syntrax 75W85 (Not 90 as the 85 supposedly has very good syncroniser additives).

Cheers

Andrew

 

Thats a good point. RP is horrid when cold, when warmed up is a lot better. Redline doesnt seem to suffer as much from this.

 

Redline gear oil won't solve this problem. I had MT-90 in my gearbox and it did not make one iota of difference.

Like I said the last time you asked this question, save your money.

 

Solve the notchiness of the gear change.

CHANGE YOUR CLUTCH

at least I did.

Gear oil helps little. I still like lightweight shock proof.

 

Taka, I replaced my clutch with Heavyduty and have been on a new gearbox for the last 15 000km's.

The notchiness is back, it crunches at every snapping gear change. This gearbox sucks.

Gear oil at 15 000km's seems a bit low, but it might save me chewing another gearbox. Again, I advise, change the gear oil as often as possible.

Would greasing the socket-end of the RP shifter help?

 

put my lightweight shockproof in yesterday and it is good for normal driving . Was after reading Taka's thread that I decided to do this .

 

Had the lightweight shockproof in for a while now and I'm inpressed with the improvement (was using Redline MT90 ) . My changes are silky smooth now - thanks for testing this for us Taka - i'm sold on the stuff .

 

I use 50% MTL, 50% MT90.

Silky smooth.....

S

 

Having lived with the purple for a while now, I agree with this. Very notchy when cold but much better than the OEM oil once it's been warmed up. Only takes about 5 mins.

So, for the first 5-10 mins, I avoid revving over 3,500rpm, avoid trying fast gear changes and avoid hard stops. My neighbourhood is much happier as a result, lol (except for when I'm coming home, mwahahaha).

 

Glad that it worked out for you... haha

I was thinking that I would be held responsible if it turned out bad.

 

Nah - I wouldn't do that . Maybe let your tyres down .......

 

haha nice one day. Actually last Friday I went and changed to Castrol Syntrans 75W-85.

My gearbox feels MUCH better now, hot and cold. Better that the RP when its warm and better than the RL at anytimeOnly test left will be on the track at Nationals.

Cheers

Andrew

 

Do you still have your original shifter? As was suggested to me, might me worth changing back. Also might want to try the Castrol. MX-5 guys apparently have similar issues and swear by it.

 

Andrew you will be glad to know that the Japanese RX-8 Party Races recommands Castrol. I have not investigate on which one yet since I have no intention to move away from Redline.

 

JDM Yo!

 

Yeah http://partyrace.nr-a.com/preparation/rx8.html

Engine oil
Castrol EDGE 0W-40
API:SM/CF　SAE:0W-40　ACEA:A3/B3/B4　タイプ:全合成油

Gear oil
Castrol TAF-X
API:GL-4　SAE:75W-90　タイプ:全合成油

Diff oil
SAF-XJ
API:GL-5　SAE:75W-140　タイプ:全合成油

全合成油 = Fully synthetic oil

 

Have been using the redline MT90 for a few months now.


I have noticed that it does suck when its cold and is really gluggy with the changes but then again, who on earth drives spiritedly when your engine is cold! thats just a one way ticket to screw up your engine!

 

Agreed Drew. The RP just gives me another reason to take it easy for the first ten mins or so.