2004 transmission

[hp2004]

My transmission on my 2004 EX surges gently around 45 to 50 in D4. What could be causing this?

[osudelt69]

Originally Posted by hp2004

My transmission on my 2004 EX surges gently around 45 to 50 in D4. What could be causing this?

You dont have a gear selector d4. Do you mean while in fourth gear with the selector in drive?

[hp2004]

Yes in "D", sorry.

[dustino8]

Does it occur more often under very light acceleration? If so, it could be the EGR valve needs cleaning/replacement. Relatively common on the older Pilots. Sometimes it will trigger the VTM and CEL lights, but not always.

[N_Jay]

I am guessing it is the 4th gear pressure switch and/or the torque converter lock up clutch.

The switch is easy, and the clutch is usually a new transmission.

There is some thought that as the switch wears out/fails, it is what is causing the clutch to fail.

At those speeds you are in 5th gear and the clutch is cycling in and out of lock-up.

But it could be the EGR also, the feeling is about the same.

EGR usually trips a Check Engine and even a VTM warning light.
Trans usually does not till it is bad enough to trip the flashing "D".

[hp2004]

I do get the flashing "D" light occassionaly.

[osudelt69]

Originally Posted by hp2004

I do get the flashing "D" light occassionaly.

You should have the dealer check your Pilot. Flashing D is NOT normal and they need to check fluid level and codes ASAP especially since you have a shifting issue.

[hp2004]

It shifts fine, just have that slight vibration from 45 to 50 mph. I have a good local mechanic in Pensacola, Honcare, which does great work.

[N_Jay]

Have him change the 4th gear pressure switch, change the fluid, and hope it gets much better.

Try not to drive at the speed where it happens, as a chattering clutch is a destructive process.

[rocky]

Originally Posted by N_Jay

Have him change the 4th gear pressure switch, change the fluid, and hope it gets much better.

Try not to drive at the speed where it happens, as a chattering clutch is a destructive process.

Nay since you changed your switches a while ago, how has it been.
I'm thinking about doing third and fourth.




Sent from my Autoguide iPhone app

[N_Jay]

Originally Posted by rocky

Nay since you changed your switches a while ago, how has it been.
I'm thinking about doing third and fourth.




Sent from my Autoguide iPhone app

It is better but not perfect.

My guess is with the high gearing and low engine speeds of the 5th gear, a bad switch engages 5th a little too early putting more then normal strain on the lockup clutch.

Chattering clutches of any kind self destruct very quickly.
I probably caught it a little late, and the clutch is a bit worn.

There was also the person (I forget who) that cleaned a filter on a valve and had some good luck.

I have not gone there yet.

[hp2004]

Any idea on est. cost for the repair of the pressure switch?

[tangotango99]

Originally Posted by hp2004

Any idea on est. cost for the repair of the pressure switch?

they must be replaced not repaired, there is a post of DIY

[roarkrd]

Originally Posted by hp2004

Any idea on est. cost for the repair of the pressure switch?

I had my fourth gear pressure switch replaced about 6 months ago and it cost about $270 ($160 of that was labor alone. The hourly labor rate was $105!). I suggest changing it yourself if you have the time and tools required.

[hp2004]

Was that @ certified dealer or your local mechanic?