Help Please 2003 1.8t Jetta

[raphster]

Hi everyone
I really need some help, I have a 2003 Jetta 1.8T with a 5 speed Tiptronic transmission, the other day code p0732 popped up gear incorrect ratio and it goes in to 1st and 2nd gear fine but when it goes into 3rd it's like its in neutral the car just revs, I have spoken to some friends and they tell me that I should change the valve body and others say I should change the transmission oil, also a speed sensor and then I also get told I need a new transmission. It does not at all smell or feel like its slipping, it's like it just doesn't engage. so I am really confused and don't know what to look at, I have been told that the valve body is outside the transmission and very easy to change, what do you guys think? I have deleted the codes and it comes back. Any help is greatly appreciated

[TTTurbo1.8T]

Originally Posted by raphster

Hi everyone
I really need some help, I have a 2003 Jetta 1.8T with a 5 speed Tiptronic transmission, the other day code p0732 popped up gear incorrect ratio and it goes in to 1st and 2nd gear fine but when it goes into 3rd it's like its in neutral the car just revs, I have spoken to some friends and they tell me that I should change the valve body and others say I should change the transmission oil, also a speed sensor and then I also get told I need a new transmission. It does not at all smell or feel like its slipping, it's like it just doesn't engage. so I am really confused and don't know what to look at, I have been told that the valve body is outside the transmission and very easy to change, what do you guys think? I have deleted the codes and it comes back. Any help is greatly appreciated

Got a 5 speed tiptronic for a 2003 1.8T for a decent price if you're interested. LMK

[raphster]

mine is gnz, and how much did you want for it?

[TTTurbo1.8T]

800-900 bucks shipped depending on location...

[raphster]

it would be going to zip 91344

[ZeroBahamutxRR]

One or more of the shift selinoids is bad in the transmission. I have the chart for testing them individually if you have a multi meter...

[raphster]

i do have a multimeter, do I need to pull the transmission out, or can I work on it while its on the car,

[raphster]

Ok I've been looking around and as I understand it I can take out the plug at the transmission computer and check the pins on it to see if my valves are gone. Is this right?
I also think that my shift solenoid is in my valve body is at the front of my transmission, is this right? do I need to drain the oil?

Thanks again, everyone for your help

[raphster]

anyone please just need to know where the shifting solenoid's are

[raphster]

hi ok i tested resistance of all solenoids and all seem to be fine, could it be my transmission or TCM? is there anything else I can check. Could my solenoids still be faulty or stuck? please anyone I really need your help

[ZeroBahamutxRR]

Sorry about that, i was gone for a couple days. IF the syleniod's are checking out good then check resistance from their wires at the trans back to the transmisson control mod (TCM) if you need a wiring diag I can try to find one. The resistance should be no more than 1.5 ohms. If there is no problem in the wiring then your looking at a new TCM. There are no specific TSB's (tech service builiten's) for this problem so make sure your basics are checked, wiring, fuse's, corroded conectors, pushed out pins in connector, disconnected or lose conections, before assuming that the TCM is bad. If you get to the point of replacing the TCM you might want to take it somewhere for a second opinion. Electrical parts, especially from the dealer, are usally non returnable and it would suck if you still have an issue after replacing it.

[raphster]

thanks you so much for your help and I really really appreciate it.. could it be my speed sensor, and could the solenoids still be bad is there anyway of checking my speed sensor without taking my transmission out. I did have a quick look at my wiring to my computer and everything seems fine but will look again

[raphster]

I followed this and I pretty much got the same, what do you guys think

1) N88 - measured 17.2 ohms - spec 9 to 24 ohms (ok)
2) N89 - measured 17.2 ohms - spec 9 to 24 ohms (ok)
3) N90 - measured 17.4 ohms - spec 9 to 24 ohms (ok)
4) N91 - measured 13.4 ohms - spec 9 to 24 ohms (ok)
5) N92 - measured 17.3 ohms - spec 9 to 24 ohms (ok)
6) N93 - measured 4 ohms - spec 1 to 5 ohms (ok)
7) N281 - measured 17.2 ohms - spec 9 to 24 ohms (ok)
N282 - measured 17.4 ohms - spec 9 to 24 ohms (ok)
9) N283 - measured 3.4 ohms - spec 1 to 5 ohms (ok)

again thank u so much

[raphster]

correction #4 N91 was pretty much in the range 17.4 as well

[ZeroBahamutxRR]

it seems like this is getting pretty intensive. It might be a good time to think about taking it to the dealer or local shop capiple of further diag. Something in the valve body might be mechanicaly messed up.