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Normal transmission shift times?

 
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IffyG
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PostPosted: Tue Aug 30, 2011 3:12 pm    Post subject:  Normal transmission shift times? Reply with quote

Aeroforce users (or anyone with a way to get at the PCMs shift time data) can you tell me what you see for your usual shift times between 1-2 when cold and warm as well as the 2-3 shift times? Mine are way longer than I think they should be and they fell as sloppy as they were when my transmission was eating itself, but I would like some empirical evidence to back up my feelings.

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PostPosted: Tue Aug 30, 2011 3:49 pm    Post subject:   Reply with quote

Just an FYI, the service manual says it will take 650ms to be considered too long by the adaptive shift algorithm

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PostPosted: Tue Aug 30, 2011 3:59 pm    Post subject:   Reply with quote

I knew it was around 600ms to be considered long by the BCM, but I'm getting tons of shifts that result in a huge delay while it tries to shift. My main concern is that when my car is cold, the shifts are crisp and take about 200-250 ms. As soon as the car starts to warm up they get longer and sloppier. For example in my 3 mile drive to work this morning the first handful of shifts were between 200 and 275 ms and they crept up to being 500ms consistently.

I'm not sure if this is normal or I am being overly sensitive because the car is really getting on my nerves and I'm aware that it ran 50 miles 3 quarts low on fluid since the shop had bad info in their manuals...

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PostPosted: Tue Aug 30, 2011 5:45 pm    Post subject:   Reply with quote

Isn't 500ms shorter than 200?

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PostPosted: Tue Aug 30, 2011 5:46 pm    Post subject:   Reply with quote

500 ms is 2.5x longer than 200 ms (.5 seconds vs .2 seconds). It doesn't seem like a whole lot on paper, but in practice you can definitely tell that the difference.

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PostPosted: Tue Aug 30, 2011 6:11 pm    Post subject:   Reply with quote

PushrodPower wrote:
Isn't 500ms shorter than 200?


Really??!?!

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PostPosted: Tue Aug 30, 2011 6:41 pm    Post subject:   Reply with quote

At cold start I see anywhere from 75 to 300 or so

Once its at operating temp, I can see anywhere from 200 to 550, sometimes up to 650..


When my transmission was killing itself i was seeing anything from 700 to 1700 at operating temp.

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PostPosted: Tue Aug 30, 2011 9:01 pm    Post subject:   Reply with quote

bbengineer wrote:
PushrodPower wrote:
Isn't 500ms shorter than 200?


Really??!?!

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PostPosted: Wed Aug 31, 2011 12:23 am    Post subject:   Reply with quote

bbengineer wrote:
PushrodPower wrote:
Isn't 500ms shorter than 200?


Really??!?!

BBEngineer


Yes really a**hole. I'm not to good with numbers. You could of just corrected me but, I know you Jersey goombas aren't the best conversationalist.

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PostPosted: Wed Aug 31, 2011 2:21 am    Post subject:   Reply with quote

I keep my aeroforce on watch of shift times... Mine usually range between 250-550 M/S... But i get the occasional 750-1000m/s shifts... If you cant tell im waiting for the transmission to take a crap again

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