v6 auto stuck in first

[YILDI2]

hi i have a vr v6 auto
that has lately been getting stuck in first gear
usually when i first turn it on and go for a drive
it changes gears all sweet then after a minute or 2
gets stuck and drops to 1st gear once i stop at lights etc..
turn it on and off its back to normal then happens again

anyone have any ideas ?
this problem started happening after i tried to switch my ignition leads to top gun leads
currently back on the old ones that was working normally for a few days after taking the top guns off

thanks

 

[delcowizzid]

check for error codes could be shift solinoid in the box or tps or vss

 

[YILDI2]

thanks delco
i will first thing tomorrow

what is tps and vss ?

 

[TheIceman]

throttle position switch, vehicle speed sensor

 

[delcowizzid]

TPS is the throttle position sensor if it reads to high a voltage it will hold gears to a higher vehicle speed than normal so wont shift out of 1st same if the vss is reading wrong will hold gears.you turn off and on it resets tps closed voltage at closed throttle and probably does the same thing again confusing the ecu

 

[YILDI2]

TPS is the throttle position sensor if it reads to high a voltage it will hold gears to a higher vehicle speed than normal so wont shift out of 1st \

ye i noticed that if i rev it out it eventually changes gears but jumps into the next gear

 

[TheIceman]

maybe even a stuffed sticky solenoid in tranny. sounds familiar.

 

[Stugdum]

My bet is on the TPS, mine was doing the exact same thing about 3 months ago, changed the TPS and its been perfect ever since. Let me give you a word of warning though, there is a tiny little rubber part that almost always falls out if you try to change it with the throttle body on the car like I did. It is so tiny you wont even notice it fall out. Mine did and it was like I had never changed the TPS, in fact at first I thought I had bought a dodgy one from brand new, but on further investigation found that slippery little sucker had fallen out. I got down on my hands and knees and searched high and low and eventually found it in my driveway, not far from where I did the job.It is basically a little cap on the end of the rod that goes up into the throttle body. It is probably better to take the throttle body off, although it can be done with the throttle body in situ if you are aware of that little rubber gizmo, and keep an eye out for it. I have an LPG setup attached to the throttle body, making it a PITA to remove it, so I took the easy route, but if you dont have all that gas **** attached to it, I would suggest removing it to change the TPS just to be sure, that way you can give it a good clean with carby cleaner while you have it off. Hope this helps.

Stugdum

 

[TheIceman]

yeah it does sound like a TPS, like a 3 speed older ford falcon when the TV gets stuck.

 

[YILDI2]

thanks for all the input guys, im about to check my error codes as i cant wait till the morning

Stugdum, i used to have a LPG set up before i rebuilt my engine, so mayb im having the same problem as you and the TPS or rubber thing has fallen out
and also how much does a TPS cost these days

thanks guys