Taurus AX4N hard 1st-2nd shift warm, cold is fine

Tiny
BIGDOGCHRIS
  • MEMBER
  • FORD TAURUS
Hey,

I have a 95 Taurus 3.0 with a 4spd AX4N tranny. Also says SHO on bottom of pan for some reason.

When the car is cold after sitting for awhile it shifts great but after it has warmed up, shift from 1st to 2nd is very hard. There seems to be a pause between the shift, only a slight pause but enough to slam it into gear, jerking the car because the rpm continues going up without the gear grabbing and when it finally does it slams in. The engine is running perfect, just a pause then when it does go into 2nd it slams and jerks the car forward. If you ease into the throttle I don't notice it much but if I pull out onto a street and accelerate to get up to speed it is very noticeable. A friend of mine that worked at a Ford Dealer on cars said it might be the torque converter.

Any help please!
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Wednesday, June 6th, 2007 AT 7:46 PM

3 Replies

Tiny
MICHAEL081278
  • MEMBER
I've ran into this problem a lot with the AX4N's. You're either going to have a bad manual lever switch, a worn bore in the valve body or a worn seal in your foward clutch piston.

How many miles do you have on the car?
Do you have any DTC's(Data Trouble Codes) stored, and if so, what are they?
Did this problem start right away or did it gradually get worse over time?

If you could answer some of these questions, I could Probably figure out which one is your problem.

I doubt very seriously you have a bad torque converter, It's possible, but you would notice it all the time and not just when it get's warm.
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Wednesday, June 6th, 2007 AT 8:09 PM
Tiny
BIGDOGCHRIS
  • MEMBER
Does that mean rebuilt tranny?
180k
The engine light doesn't come on and I've never had it scanned. But it works, it flashes on when the cluster panel lights up on start
It's been like this sinse I have owned the car, for 3.5 years. When I bought it, I drove it very slow and didn't hammer on it and it was cold at the time so I didn't really notice an issue until it was mine.
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Wednesday, June 6th, 2007 AT 8:12 PM
Tiny
TOURDEFORCE
  • MEMBER
The car acts fine when cool. Wouldn't a worn bore or seal act up when cold also?

There is a control wiring harness that plugs into the transmission. Unplug that connector & clean the contacts if they're dirty. Free and easy. Also try adding an additional stacked plate cooler to your transmission. I've been able to avoid the hard shift when hot by putting the transmission in neutral at stop lights to prevent heat build up from friction.

If the above don't solve your issue, the first things I'd suspect would be a bad solenoid for the 1-2 shift, or a bad transmission fluid temp sensor, or faulty programming in the PCM that may need an update. Ford was very tight with some of their programming (example: the O2 sensor tolerances in the Contour. That car threw a lot of codes) and this may be the case. If the trans temp is reading high, the PCM may default to an over-pressure 'limp mode' to protect the clutch packs.
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Wednesday, March 2nd, 2011 AT 9:51 PM

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