Transmission acting like it is in drive all the time
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Transmission acting like it is in drive all the time
Hi I just bought a 2004 s60 I bought it with no reverse but when in park it wants to lurch forward in reverse nothing neutral it acts like it is in drive can go forward until about 25 mph then goes into neutral and in drive it shifts out fine
Senior Member
Joined: Jul 2020
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From: GA
Unfortunately you bought a car with a bad transmission. A valve body or new solenoids MIGHT fix it - and valve body work requires considerable skill. Many companies sell "rebuilt/remanufactured" valve bodies.
The 1 customer that wanted to try that route (instead of a new transmission) was almost pleased with the result - It almost fixed all the transmission problems with a valve body and a transmission adaptation. After the valve body work you will need VIDA or a compatible scan tool to put the transmission control unit into adaptation mode - where you drive the car in a certain fashion and the TCU figures out the best way to control the shifts.
If the transmission has over say 150k miles - valve body work is probably a waste of time/money.
The 1 customer that wanted to try that route (instead of a new transmission) was almost pleased with the result - It almost fixed all the transmission problems with a valve body and a transmission adaptation. After the valve body work you will need VIDA or a compatible scan tool to put the transmission control unit into adaptation mode - where you drive the car in a certain fashion and the TCU figures out the best way to control the shifts.
If the transmission has over say 150k miles - valve body work is probably a waste of time/money.
Senior Member
Joined: Jul 2020
Posts: 5,113
Likes: 677
From: GA
A used one? You have a used transmission already. Do you think a used one will be better than the one you have? There is no way to tell until after you (or someone you pay) has spent 6-9 hours installing it and driving it for a few hours.
In answer to your question - The TCU has set shift characteristics/ shift points trying to make your existing trans shift as smooth as possible - if the TCU has modified normal patterns drastically - "another transmission" may shift just as bad as the one you have - unless you put the TCU in adaptive mode and finish the adaptive drive cycle.
If you don't the TCU will eventually figure out how to make the new trans shift smoothly.
In answer to your question - The TCU has set shift characteristics/ shift points trying to make your existing trans shift as smooth as possible - if the TCU has modified normal patterns drastically - "another transmission" may shift just as bad as the one you have - unless you put the TCU in adaptive mode and finish the adaptive drive cycle.
If you don't the TCU will eventually figure out how to make the new trans shift smoothly.
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