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  #16 (permalink)  
Old 01-03-2012, 09:04 PM
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Quote:
Originally Posted by curtis73
First thing I would do is hook up a scanner. Check two specific things: 1) trans temp, and 2) MLP... the shifter position switch.

In the internal wiring harness is a temp sensor. Sometimes you'll pull up the data on a scanner and it says -40 degrees. If its reading something that is nonsense, it needs to be replaced.

The MLP is a relatively common failure. If the ECM doesn't know what gear you've selected, its flying blind.

If both of those check out fine, pull the pan and tell us what kind of debris is in there.

... and I will assume that the speedo is working? Same thing happens with the speedo sensor as the MLP - the ECM doesn't have the proper information to make shift commands.
Okay, I got the issue resolved with the software provider and will finalize the purchase tommorrow, but I'll have to wait a couple of days for shipping (I can receive the software electronically, but I'm going to need a different interface cable than the one I have for my TA, and that will come Fed Ex).
The software includes a fully funtional scanner so I'll be able to provide any information we need.

Yes the speedometer is working.

Thanks curtis73!

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  #17 (permalink)  
Old 02-26-2012, 11:23 PM
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Quote:
Originally Posted by tnsmith10
with what youre explaining here, the first thing id do is hook up a pressure gauge to see if the trans is getting line rise (pressure should go up when stepping on the gas).
also, id check it for codes with a scan tool and not just a code reader. something that will also pull stored codes.
depending on the answers to these questions will tell whether its worth it or not to go on with any service and/or repairs to the trans.
Sorry for the delay posting back. I had some higher priority issues to deal with like thrown rod ect.
The pressure is ~60 psi at idle in park and jumps to ~90 psi at idle in reverse. It drops back to ~60psi at idle in drive and increases as the throttle is increased. When driving at speed the pressure increases with throttle increase and is highest at lower RPM's during acceleration. The highest pressure I observed was ~120 psi.
With my scanner set to transmission mode, current MIL's are: P0420 and P0128.
History MIL's in transmission mode are: P0420, P0128, C0222, B0036, U1016, U1041, U1096, and U1064. (Other than P0420 and P0128, those codes are Supplemental Inflatable Restraint.
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Old 02-27-2012, 12:09 AM
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Quote:
Originally Posted by curtis73
First thing I would do is hook up a scanner. Check two specific things: 1) trans temp, and 2) MLP... the shifter position switch.

In the internal wiring harness is a temp sensor. Sometimes you'll pull up the data on a scanner and it says -40 degrees. If its reading something that is nonsense, it needs to be replaced.

The MLP is a relatively common failure. If the ECM doesn't know what gear you've selected, its flying blind.

If both of those check out fine, pull the pan and tell us what kind of debris is in there.

... and I will assume that the speedo is working? Same thing happens with the speedo sensor as the MLP - the ECM doesn't have the proper information to make shift commands.
According to my scanner the transmission temp sensor is working. On one occasion after a 5 mile 55 MPH drive, the temp was ~180 degrees farenheit.
The scanner displays the correct gear when shifting 1-4. When stopped it displays 1 no matter what position the shifter is in (meaning that the scanner is diplaying the actual gear the transmission is in rather than what position the gear selector lever is in.)
I pulled the pan to change the filter and found absolutely no debris such as metal or friction material in it, although a filter change may have been done recently. If so it wasn't real recent because there was some build-up of dirt, road grime ect on the pan bolt heads.
Yes the speedometer is working fine.
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Old 02-27-2012, 05:18 AM
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I've got some problems posting scan results that I haven't figured out yet but here are some screen shots of some of the MIL info.
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Old 02-27-2012, 06:33 AM
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Quote:
Originally Posted by mike 96 ws6
Sorry for the delay posting back. I had some higher priority issues to deal with like thrown rod ect.
The pressure is ~60 psi at idle in park and jumps to ~90 psi at idle in reverse. It drops back to ~60psi at idle in drive and increases as the throttle is increased. When driving at speed the pressure increases with throttle increase and is highest at lower RPM's during acceleration. The highest pressure I observed was ~120 psi.
With my scanner set to transmission mode, current MIL's are: P0420 and P0128.
History MIL's in transmission mode are: P0420, P0128, C0222, B0036, U1016, U1041, U1096, and U1064. (Other than P0420 and P0128, those codes are Supplemental Inflatable Restraint.

line pressure is a bit low from what i see. this could explain your shift issue.
from here, i would turn up the epc maybe the 1/8th turn max i mentioned before, or get a new epc.
you should see about 75 lbs in drive at idle.
if you decide to replace it, i recommend a borg warner replacement
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