If you shop at Amazon.com (for anything), use this link to support FordTaurus.net!

2000 Taurus transmission overdrive issue

Post Reply
Rusty95
New Member
Posts: 5
Joined: Wed Apr 29, 2015 11:16 am

2000 Taurus transmission overdrive issue

Post by Rusty95 » Thu Jan 11, 2018 11:20 am

I have a 2000 Flex fuel. With the vulcan motor. I have 97000 miles on it.
I was driving home from work this morning about 45 minutes into our trip when the car started to feel like it was hunting for OD. As I got closer to 70 the trans would bounce between gears. And the RPM would go to 3000 it is normally 2200 at that speed. When I stayed around 60-65 it seemed fine. I just took it out for a 30 minute ride and the trans shifted great and no issues with the trans hunting for OD. I got it up to 70 with no issues. I bought the car with 90K on it and just use it to go back and forth to work. I don't know when the fluid was changed last but I haven't changed it in the time I have had it. It could use a fluid change. But I am not sure if I should do it, I am worried the trans will start to slip and become no good if it is done. I have had other cars were the fluid was changed when it was really brown and the trans went a couple of days later.

Any ideas about the problem I am having. I don't know if it the VSS or the solenoid.


mmsstar
Regular Member
Posts: 171
Joined: Sat Feb 14, 2009 11:48 am
Location: CLeveland Ohio Area
Vehicle: 2011 Flex SE

Re: 2000 Taurus transmission overdrive issue

Post by mmsstar » Thu Jan 11, 2018 2:24 pm

A drain and fill shouldn't upset the trans like a flush would.

User avatar
Webmaster
Site Administrator
Posts: 2047
Joined: Tue Jan 06, 2004 11:16 pm
Vehicle: 2002 Ford F-150 XLT SuperCrew
Contact:

Re: 2000 Taurus transmission overdrive issue

Post by Webmaster » Thu Jan 11, 2018 8:53 pm

I had a 1992 Mercury Sable with a slipping transmission. Being young I thought a full fluid flush would help. Nope, that was a waste of money.

First thing's first. What's the level and color (condition) of the fluid? If the fluid level is low it can cause various problems.
2000 Ford Taurus SEL (excellent car, sold to a friend)
1992 Mercury Sable GS (good car except for the tranny, sold)
Current: 03 F150 King Ranch SuperCrew
Other Fords owned: 02 F150 SuperCrew 4x4, 11 F150 EcoBoost, 07 Ranger, 01 F150 XLT, 98 F150 XLT, 96 Thunderbird LX, 95 Escort GT, 86 Mustang LX, 82 Mustang

Rusty95
New Member
Posts: 5
Joined: Wed Apr 29, 2015 11:16 am

Re: 2000 Taurus transmission overdrive issue

Post by Rusty95 » Fri Jan 12, 2018 10:19 am

Webmaster wrote:
Thu Jan 11, 2018 8:53 pm
I had a 1992 Mercury Sable with a slipping transmission. Being young I thought a full fluid flush would help. Nope, that was a waste of money.

First thing's first. What's the level and color (condition) of the fluid? If the fluid level is low it can cause various problems.
The fluid is the right level and as I said in the original post it needs to be changed. But I don't think that is the problem as all the other gears shift normally while driving. I don't think a solenoid or a sensor would be affected by fluid.
I have been working on cars professionally and on my own for over 40 years and just need someone to point me in the right direction. I took the car out today and the trans worked fine. Could this have been a one time glitch or will this come back to haunt me.

ChartGuy
Regular Member
Posts: 256
Joined: Mon Feb 04, 2013 6:01 pm

Re: 2000 Taurus transmission overdrive issue

Post by ChartGuy » Sun Jan 14, 2018 4:10 pm

Consider this: when you take your foot off the pedal, and the throttle body goes to "idle stop" the TQ unlocks instantly. It will lock up after a short time after you move the throttle off idle stop. If the TPS gives a slightly false signal the system would think you are off the throttle when you are not. TPS is a wear item and it wears most at and near the idle stop position. Motortcraft part at Rockauto ~$25.

I had a different issue, I had irregular idle and the OBDII signal showed irregular signals at idle with the engine running. Replaced the TPS with OE part and no difference. I back tested the signal and found the signal out is unsteady. 5V reference is perfect. Ground = "return" is changing with the engine running but fine with the key on and engine off. All the returns from sensors go to the common post on the firewall on the pas side. I removed the eyelets and they are clamped over paint on the body. Eyelets corroded. I cleaned the eyelets, and sanded the paint off the body tab. Coated all with anti-corrosion electric compound and put things back. Issue resolved. Note: the alternator negative power is the strap to the body here.

Just sharing.

-chart-

Post Reply