i recently changed the fluid in the trans (5spd out of a 78) in a 240z with redline 75-90. i used roughly over 2 quarts. i took the car for a drive and for the first time ever i grinded a 3rd to 2nd shift.... no big deal, but then it happend 3 more times. either by engine breaking or for acceleration out of a corner. i have never grinded a single gear in the car ever. (i do not know what type of fluid was in the trans, but i t did seem thinner.)

now this may be just a strange conincidence, but something doesnt seem right. So, is this something?, or just completely ironic?

Thanks

Double check your bottles and be sure what you put in. It sounds like you have the wrong fluid, redline has many different gear oils in a 75/90. I am looking at using Redline MTL in mine but have not as of yet, I have run MTL in a 82 5 speed maxima and a 85 5 speed FWD maxima with great results.

You should call Redline and ask them.

I have Redline MT-90 in my 240Z's 4 speed, and it works great. MT-90 is a 75W-90 designed especially for manual transmissions.

BTW, 2 quarts sounds like too much to me, I thought Z transmissions only took 1.5 quarts or so.

Double check your bottles and be sure what you put in. It sounds like you have the wrong fluid, redline has many different gear oils in a 75/90. I am looking at using Redline MTL in mine but have not as of yet, I have run MTL in a 82 5 speed maxima and a 85 5 speed FWD maxima with great results.

You should call Redline and ask them.

you are exactly right... i decided to go grab an old bottle just after i posted this.... guy sold me the wrong stuff

there is a huge paragraph on the back of the bottle..(which i didnt read) 2nd to last line "this product is not designed for use in most manual transmission, since the extreme slipperiness may cause gear clash"

i know what ill be doing tomorrow..

thanks for the reply

i couldnt find any documentation on how much fluid the 78 5 pd took. i found other posts that said the 5peeds took 2.25 qts. and like an idiot i didnt get the car level and add it till it came out the fill hole.... i just put the 2.25qts in. first thing i have ever half assed in this car...:disappoin