how long does redline last?

[digitaldrifter91]

hello guys, you guys gave me advice to go with redline fluid for my 300zx non turbo 86.

well its been about a year now and the thing is hard to put in first and second and also grinds once in a while. i know im driving fine but it seems stiff. do you think since i just put it in, it cleaned out all the little things in there and now wants to be changed to some new fluid or am i overlooking something?

http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=16;t=001882

old post there

the transmission was rebuilt when it had 90k on it. back then when i put redline it had 117k and now its about 130k. 15k in a year...thats alot, any opinions?

sometimes i try to push the clutch in and take it out a few times to get it in geawr but now its not working that way...it seems i have to shove the sucker in gear, everything else checks out though.

thanks.

 

[surfstar]

Redline should last 30-60k miles in a manual tranny gearbox. I noticed decreased shift quality after 40k miles or so. I now run Pennzoil Syncromesh and plan to change it at 30k/2 years. Its cheaper and I can purchase it locally.

 

[mechtech]

PennSynch sure is handy to get, and is good. Still, I'd change it every year or two - it is a dino fluid.
How about ordering an appropriate fluid from Specialty Formulations?
Sure, a little more time and money, but if there is a better gearbox fluid made, I'd like to know.

 

[Rooy]

Your problem does not seem fluid related. Check the adjustment of the clutch. It sounds like it's not completely disengaging.

 

[rpn453]

Fluid level OK? If so, I agree with Rooy that it might be something else.

I've got 30K miles on the MT-90 in my Mazda3 and I don't plan on changing it until 60K. It still works like it did when I put it in.

 

[digitaldrifter91]

i adjusted my clutch today, there was a bit of freeplay in it so ill road test it tomorrow and see what goes on.

 

[Thatwouldbegreat]

I change Redline MTL / MT90 / 75W-90NS at 50K intervals in gearboxes, and 75W-90 at 75K intevals in the differentials.

 

[digitaldrifter91]

well i drove it today, it seems great. once in a great while its hard to put in first or second, i have to put it in third or fourth then in first to get it in.

sometimes the tranny grinds in second and going to 3rd...even though this is a rebuilt tranny it still has the same issues as the stock one hehe. maybe that can be the cause comming to haunt me.

but at least i can get it in gear 9/10 times =)

 

[unDummy]

Inspect the shifter. If you have any replaceable bushings/linkages, replace them.
Or, try an aftermarket shifter.

Is this a hydraulic clutch? did you bleed it? have the master/slave ever been replaced?

 

[digitaldrifter91]

its hydrolic. the master and slave went out so i replaced it a year ago... but i always had issues with first gear but not like this one.

i may bleed it just for the **** of it again, the fluid in there is just a light brown still.

 

[ex_MGB]

Have you ever greased the ball and socket joint the shifter "sits" in? On my '97 Max SE 5-speed I finally got around to this. what an amazing difference a bit of Redline synthetic grease made.

The old factory grease had turned into a hard white substance. I worked, with difficulty, some Redline grease in and it made a world of difference in the feel of the shifts.

Max came with nice hard plastic bushings in the likage and I greased these as well.

You might, rather than having to disassemble the shifter ball and socket, buy a grease needle from a farm tractor supply place. This fits on a grease gun and lets you shoot grease into tight places.

Here's something:

http://saltfishing.about.com/library/weekly/aaprreelsaver.htm