Close
Trans. 2-3 shifts slow and then a bump, but at proper speed
1999 Lincoln Town Car

Trans. 2-3 shifts slow and then a bump, but at proper speed

(1999 Lincoln Town Car)
1999 Town Car, 100k miles, transmission shift from 2nd. to 3rd, is slow, then finishes w/ a bump when completed. This happens at the proper speed and time but.. it is slow to complete. First time shift when cold, is smoother, almost normal but gets slow as soon as 2 or 3 minutes of trial. New fluid and trans cooler. Suggestions?
1 answer & 5 comments
Popular Answer
on September 22, 2009
Hello,
Did you find out why the transmission was shifting like this? Did it cost a bunch to get it fixed? thanks!
Sign in to reply
on September 24, 2009
Hey, thanks for the update. I looked at the technical service bulletins for your car and found this:
TSB 99-18-5
1997-1999 TOWN CAR
A perceived 2-3 delayed upshift, primarily when transmission is cold, may be evident on some vehicles. The Powertrain Control Module (PCM) strategy is designed to delay shifts in some vehicles when Transmission Fluid Temperature (TFT) is below approximately 21°C (70°F) for faster heater warmup. The 2-3 shift may be delayed approximately 14-24 km/h (9-15 mph) when compared to the shift speed charts listed in the appropriate Service or Workshop Manual. A leaking 2-3 accumulator may cause Diagnostic Trouble PART NUMBER PART NAME Code (DTC) P0782.
ACTION
Verify if delayed upshift is normal cold shift scheduling or a possible leak past the large diameter 2-3 accumulator seal.

You'll need to see the bulletin for more info on the service procedure, but this may be a solution to your problem.
on September 23, 2009
Hi; what I've done is: Removed the pan and changed the fluid and filter, added a drain to the pan, replaced the fluid w/ pennzoil although it was not the type 5 as required ( changed the fluid by pumping it out by running the car in different gears as to flush both the trans, converter, cooler and all lines, 17 quarts of it)and added a Lubeguard green to make the fluid act as a type 5. No change to the way the transmission shifted.
Also added a separate cooler as for towing service.
Now what I'm doing is letting off the pedal at the time of the 3-4 shift, around the 30 mph speedometer read, and it eases the shift to preserve the trans. for some longer time. Probably needs to remove the valve body and replace pistons, accumulators and solenoids. Will probably never get to it unless it gets worse. Good luck to you.
on September 24, 2009
Hi Munkyrench !;
You have been studying and bringing home the homework!.
The problem with the transmission on the '99 Town Car, (with time I've been able to get more specific symptoms), is this:
It's that the 2nd. to 3rd. shift is slow in completing, although at the proper RPM and vehicle speed and ends with a bump when it engages the 3rd. gear.
This happens every time it shifts, specially when going slower and when car is warmed up.
When I drive out for the day,(even on a warm day,although I don't warm it up before driving away) the fist time it shifts from 2-3, it shifts almost perfect!.
It is on the subsequent shifts that this slow to shift.....bump happens at around the proper 30 MPH, but, if I drive it harder, meaning, I accelerate faster than the normal traffic, like getting onto a ramp for an Interstate, the shifting is great, smooth and quick.

when it gets to a stop sign and I

on September 24, 2009
Hi Munkyrench;
(Ran out of space writing.) '99 town Car shifting weird.
There are no diagnostic codes that show so far.
Trans shifts well when cold, the colder the better.
I do believe you are right with the fluid leaking past the large accumulator piston or a valve in the valve body.
Someone suggested adding something to the fluid to make it thicker!.
I believe I should take apart the valve body, clean it and change to those rubber covered pistons 1 and 2 and a few of the valves and new springs,(don't know what colors or which springs or which valves or solenoids to change) Do you?
I will read the bulletin you recommended to learn more.
thanks again for any more suggestions! slowpoker.
on September 26, 2009
Oops.... How and where do I find the Service Bulletin you speak about for the '99 Town Car? Online?
Also, would that source also show me how to get the 'Cruise Control' to work again? Tried all the fuses and that's not it. The brake lights work, so it's not the BOO switch disconnect.
Automatic Transmission Diagnosis
$88 - $111 Learn More
on September 22, 2009
Hello,
Did you find out why the transmission was shifting like this? Did it cost a bunch to get it fixed? thanks!
Sign in to reply
on September 24, 2009
Hey, thanks for the update. I looked at the technical service bulletins for your car and found this:
TSB 99-18-5
1997-1999 TOWN CAR
A perceived 2-3 delayed upshift, primarily when transmission is cold, may be evident on some vehicles. The Powertrain Control Module (PCM) strategy is designed to delay shifts in some vehicles when Transmission Fluid Temperature (TFT) is below approximately 21°C (70°F) for faster heater warmup. The 2-3 shift may be delayed approximately 14-24 km/h (9-15 mph) when compared to the shift speed charts listed in the appropriate Service or Workshop Manual. A leaking 2-3 accumulator may cause Diagnostic Trouble PART NUMBER PART NAME Code (DTC) P0782.
ACTION
Verify if delayed upshift is normal cold shift scheduling or a possible leak past the large diameter 2-3 accumulator seal.

You'll need to see the bulletin for more info on the service procedure, but this may be a solution to your problem.
on September 23, 2009
Hi; what I've done is: Removed the pan and changed the fluid and filter, added a drain to the pan, replaced the fluid w/ pennzoil although it was not the type 5 as required ( changed the fluid by pumping it out by running the car in different gears as to flush both the trans, converter, cooler and all lines, 17 quarts of it)and added a Lubeguard green to make the fluid act as a type 5. No change to the way the transmission shifted.
Also added a separate cooler as for towing service.
Now what I'm doing is letting off the pedal at the time of the 3-4 shift, around the 30 mph speedometer read, and it eases the shift to preserve the trans. for some longer time. Probably needs to remove the valve body and replace pistons, accumulators and solenoids. Will probably never get to it unless it gets worse. Good luck to you.
on September 24, 2009
Hi Munkyrench !;
You have been studying and bringing home the homework!.
The problem with the transmission on the '99 Town Car, (with time I've been able to get more specific symptoms), is this:
It's that the 2nd. to 3rd. shift is slow in completing, although at the proper RPM and vehicle speed and ends with a bump when it engages the 3rd. gear.
This happens every time it shifts, specially when going slower and when car is warmed up.
When I drive out for the day,(even on a warm day,although I don't warm it up before driving away) the fist time it shifts from 2-3, it shifts almost perfect!.
It is on the subsequent shifts that this slow to shift.....bump happens at around the proper 30 MPH, but, if I drive it harder, meaning, I accelerate faster than the normal traffic, like getting onto a ramp for an Interstate, the shifting is great, smooth and quick.

when it gets to a stop sign and I

on September 24, 2009
Hi Munkyrench;
(Ran out of space writing.) '99 town Car shifting weird.
There are no diagnostic codes that show so far.
Trans shifts well when cold, the colder the better.
I do believe you are right with the fluid leaking past the large accumulator piston or a valve in the valve body.
Someone suggested adding something to the fluid to make it thicker!.
I believe I should take apart the valve body, clean it and change to those rubber covered pistons 1 and 2 and a few of the valves and new springs,(don't know what colors or which springs or which valves or solenoids to change) Do you?
I will read the bulletin you recommended to learn more.
thanks again for any more suggestions! slowpoker.
on September 26, 2009
Oops.... How and where do I find the Service Bulletin you speak about for the '99 Town Car? Online?
Also, would that source also show me how to get the 'Cruise Control' to work again? Tried all the fuses and that's not it. The brake lights work, so it's not the BOO switch disconnect.

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
I must depress the turn on switch on the steering wheel 20-30 times in order for it to turn on. once it is finally...
When my air is on and running no water is coming out under car but plenty is coming into car on back floor. where...