ok, to start i am currently driving my brothers 90 std civic hatch, 4 speed tranny ok well when i start up the car and go drive the transmission sounds fine with no grinds or anything. after about a half hour of driving the 2nd gear will start to grind slightly and just gets worse the more i drive it. if i double clutch going from first to second it seems to not grind, but if i dont it does. and when i downshift it always grinds if its warmed up. it seems like the more its driven at once, the worse the grind is. i have a few quarts of GM syncromesh, would that help the grind? thanks guys

 

change the transmission fluid.

add a bottle or 2 of GM syncromesh and then the rest honda MTF.

should take about 4 litres.

 

i thought that honda transmissions were 2.3 quarts or something near there. would it hurt to just put all syncromesh in there?

 

i've heard the mix is where its at.

all hearsay tho. I have a few bottles on the shelf in my workshop, never needed to use them, just got them for a really good price so i scooped em up.

 

ok thanks for the help and quick response 89s1!

 

4 liters is way way too much.. the d transmission takes 2 quarts on the dot, which is 1.8L. Honda MTF is the way to go, imho, but it sounds like your transmission is heating up too hot and causing issues with the trans fluid. I have the same issue, but with a race transmission with a 4.9 final drive. It works great for about 20 mins of normal driving, but longer than that and you cant shift into second without grinding.

you may look at something like Redline MTL or MT-90 that will work better with the higher temps, but my guess is there is something wrong in the transmission that is causing the problem, like a bad bearing or something.

 

well hopefully its nothing that bad, its just my brothers car when he gets he license. i will try syncromesh tomorrow to see if it helps any

 

Hey!!!! Wel anyways IDK if this helps at al but I know that kingmotorsports.com do tranny rebuilts for $600.00.... If you whated to know.

 

haha no offense but no thanks. ill just try the syncromesh and if it doesnt solve the problem ill work from there. $600 for a tranny rebuild is damn expensive...