LT1-LT4 Modifications 1993-97 Gen II Small Block V8

94 Car with 95(?) Transmission

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Old 10-19-2014, 06:07 PM
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Default 94 Car with 95(?) Transmission

I've got a 94 A4 that's been tuned like a 95. The trans is aftermarket, was in the car when I got it, had about 1000 miles on it when the engine fried and it came to me a couple months later. After the engine swap (stock replacement 94 Trans Am engine with 41k on it) I discovered that the trans is at least a 95, since it has PWM stamped on the pump housing.

So- when I got it running again, I didn't know the trans was PWM, got a hidden code 84 (3-2 downshift solenoid operation error). Limp mode, no OD, no TC lockup. I talked to my tuner and had the PCM flashed as a 95, ran a wire from PCM D6 to case connector pin U. That should have done the trick. I haven't tried to pull codes to see if the 84 is still there, but the behavior hasn't changed. No 4th gear, limpy starts.

Today I got a chance to check some things on it. I checked the resistance of the solenoids to see if one was out of spec. First I completely disconnected the battery and got values that were all above the spec. Then I connected both battery cables and got nothing at all. Then I disconnected the battery negative and got these, which I thihnk are legit values:

1-2 solenoid: 22.3 ohms; spec for 95 is 20-40 ohms
2-3 solenoid: 22.4 ohms; spec for 95 is 20-40 ohms
3-2 solenoid: 11.8 ohms; spec for 95 is 9-14 ohms
TCC solenoid: 29.3 ohms; spec for 95 is 20-40 ohms
PWM solenoid: 12.0 ohms; spec for 95 is 9-14 ohms

I just put the meter in the PCM connector pin holes with the - side and the + side of the meter to the batt + block in the pass. side fender behind the batt.

Anything else I can cover with a multimeter before I assume there may be mechanical damage to the trans? This is a K-case trans that would be worth rebuilding but $7-900.00 is more than I can swing right now. May look for a used 95 from a known F-body.

Thanks
Old 10-19-2014, 06:51 PM
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Forgot to mention that when I first ran the wire for the PWM solenoid, the battery would drain to dead in about 2-3 days. It's been a while since I had a chance to do anything with the car. Thought I had misplaced the pin at one end or the other, that's why I did a sanity check to see if I saw correct resistance in the solenoids at the trans end, or possibly a ground fault. That tells me the wiring is right at that end. I'm stumped for the moment.
Old 10-20-2014, 07:14 PM
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Is there power at the transmission connector? All the solenoids get power on the same wire.
Old 10-20-2014, 10:22 PM
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http://www.camaroz28.com/forums/driv...-guide-476780/

Maybe this will help..
Old 10-21-2014, 12:12 AM
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I don't think you can use a 95 trans in any other year
Old 10-21-2014, 08:06 AM
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Originally Posted by NewOrleansLT1
Yep, I did Mod 'A'

Originally Posted by flame
Is there power at the transmission connector? All the solenoids get power on the same wire.
Someone else mentioned checking this as well. I'd have thought I'd have more issues and associated codes if none of the solenoids was getting power. But it's the next thing I'm eliminating as soon as I get back to get some more time with the car. It's only 7 miles away but might as well be on the moon some days (wife keeps me busy )



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