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Old 09-28-2013, 06:10 PM   #1
Quadrapole
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Transmission slipping? 08 ATX 96,000km

Firstly, I just want to thank everyone since I've found this forum very helpful in maintaining my Focus.

I have a 2008 Focus with automatic transmission and I've noticed that it started to have a spike in rpm whenever I first start the car going from 1st to 2nd. It doesn't occur after the engine is warmed up however, only when I first drive it after a few hours of it not being driven. After that first slip, I ease off the accelerator, and then everything seems to work fine afterwards.

Does this mean I'll need to get the tranny replaced or does anyone know of any simple fixes I can try first?

I have a link to an excel log with graph (from an OBDII) and you can see the spike occurring at 56:03.7.

It seems to have jumped 400 rpm in 1 second!

I've checked the tranny fluid and it seems to be red and doesn't have any odor. I'll check the levels once I get the engine heated up (btw, how do we cycle through the gears on an automatic?).

Anyone know anything I can try? Is this a really major problem or something I can delay for a bit (poor student, can't afford a 2000+ fix on a 6500 car)?

Excel file:

http://rapidgator.net/file/129880a6e...9-41.xlsx.html


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Old 09-28-2013, 06:17 PM   #2
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I have also uploaded this picture of the graph.

I can usually tell when it's going to spike, so you can clearly see me starting to ease off the throttle, just before the spike, and then there is huge spike despite a decrease in throttle and mass airflow rate.

I can also upload a graph including engine load% if that'll be helpful.

Can anyone diagnose this?
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Old 09-28-2013, 07:22 PM   #3
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Does it only do it the first time shifting up through the gears after the car sits for a while?

The accumulator piston bores and other hydraulic passages can drain off fluid at rest
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Old 09-29-2013, 05:49 PM   #4
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Quote:
Originally Posted by elsolo View Post
Does it only do it the first time shifting up through the gears after the car sits for a while?

The accumulator piston bores and other hydraulic passages can drain off fluid at rest
Yea, it only does it the first time it shifts up through the gears.

What might the that be a symptom of?

Thanks!
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Old 09-29-2013, 07:35 PM   #5
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I think the accumulator piston bores (or something else) drains after the car sits on higher mile 4f27e tranny's.
After the trans cycles through the gears once, the problem is gone.
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Old 10-02-2013, 11:16 PM   #6
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Is there anything I can do to fix this?

I checked fault codes with my cheapo chinese OBD scanner and it reported a body fault. No solenoid or anything.

I also checked the tranny fluid with engine off right after running the car for 15 min and it seems like fluid is about 0.5 cm above the max line.

Could that be the reason why?

Fluid is red and has a sweet odor
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Old 10-07-2013, 07:10 PM   #7
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