ok guys. when going to work or school at around 7:30 am, when my car is completely cold, and after warm up i start driving it, the shifting is kind of rough until the heat gauge is at half way and 10 mins more of driving. what could that be???

 

that would be your car behaving normal! When your engine is warmed up by you sitting there for 10 mintues in the morning with the car in idle doesnt mean your tarnsmission is warmed up too since it hasnt been driven yet. After you drive it for a couple of miles it will get warmed up and then u should be good to go. Just make sure u replace your tranny fluid every 30,000 miles to maintain it.

 

Ive noticed the same thing happening to me, I didnt really think much of it, the car runs fine once it is fully warmed up...

 

no, i did not say warm up for 10 mins. i said warm up, then drive until heat gauge is halfway up and then 10 extra mins on top of that until my shifting becomes smoother. its weird. because its really rough, i can actually feel like the shifting going into the gears.

is it ok to mix tranny fluid??? or should you do a complete drain and fill? because i got it done like no more than 8 months ago and maybe they did not fill it up to how much its supposed to be in there. if i would to refill it, would i have to use the same tranny fluid?

 

use the same wait. It is normal for that to occur when it is cold outside. You think you can feel your gears, my 5th gear synchro is gone. I have to double clutch and let the rpm's drop to 1000 before I shift to 5th and it grinds 70% of the time! Try that one at 130mph, it SUCKS

 

doode, i know how that feels. my tranny was rebuilt because my 1st, 2nd, and 4th gear failed on me.

 

You can mix new and old fluid, or various brands...just make sure its the right kind, Dextron/Mercon III.

Any tranny will be affected by the cold...fluids get thicker, thats all.

I know you said 8 months but was that just draining the pan or full fluid change? I would consider a full fluid change if you car has never had one. If you do it yourself, as its not very hard, I would switch to synthetic ATF (Mobil 1 works for many here) which is less affected by the cold.

 

I think he has a five speed.........My car is rough going into gears when its cold out 2nd gear is the worest so I try and skip it in the mornings.

 

VERY CLEAN MAXiMA!

 

well 8 months ago i had my tranny rebuilt and im sure it is brand new tranny fluid in there. i just dont know if they did put the right one in. so either way, i may just do a full drain and fill soon.