its an 03 sedan with the 5at transmission. the car has 103xxx miles on the car. the problem started off about a month ago and wasnt near as bad as it is now.

whenever i would be cruising around 50 and be in 5th gear, if i were to slowly press on the gas to accelerate, the motor would rev higher, but the speed would stay the same. it almost felt like a clutch slipping on a manual. only if i gave if enough gas the transmission would downshift and lets say its not the smoothest downshift i could ask for. just yesterday, went and got the transmission fluid changed, and now its even doing the problem when im simply starting off in 1st. i was at a red light going up a hill on the way to work this morning, and the problem occurred just as before...but this time it was in 1st. from a stop, i let off the brake, and press on the gas. the motor starts to rev up to 3k+ but barely any power is going to the wheels. then a hard thud, and the car takes off. and like i said, especially for this instance, it feels like a slipping clutch on a manual.

any help or some sort of solution would be greatly appreciated. thanks guys

 

valve body is shot. eventually it will cause the clutches to burn up. Valve body at dealer brand new about $800-$1000
Junk yard transmission with about 50k miles $500-$700

 

should get a code for hi\lo clutch solenoid valve

 

Smh my car(111k) started doing that like 2-3 days ago! Should i still get a code if my check light is not on? I haven't flush the trans fluid yet but going to do that first thing monday.

 

I've been pricing some trans around the are (04 with 30k for asking $700). My question is will a coupe or a 350z trans also work for my 04 sedan or what type of trans should I look for? Thanks.

 

same problem here. Drive in tiptronic in 4th. It helps.

 

I'd be willing to bet its NOT your valve body

If anything it is more likely to be clutch packs slipping. This is why I always recommend people put better cooling on their transmissions. Factory is insufficient like 99% of the time. It will get your through warranty, but if you really want an AUTO to hold up you need to keep temps from climbing past 220-230*.

I am running a B&M cooler for my trans fluid - i run it in series with my stock cooler.

I have an extra Valve Body for a 2003 5AT in my possession. I'm willing to sell it if you are looking to buy one. has about 40K miles it.