4R70W Driving me Nuts!!! - TCCoA Forums
 
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post #1 of 11 (permalink) Old 06-14-2004, 11:58 PM Thread Starter
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4R70W Driving me Nuts!!!

I don't think these transmissions like me. I'm having some issues after doing the J-mod and installing an Apten chip in my '94 Mark. This happens after the tranny is warmed up. While driving along, if I let of the gas and let the car slow to about 30mph, the tach will start jumping from 1,000-1,200 rpm real quick, over and over until I get back on the gas. What could cuase this? My '97 Sport did the exact same thing after doing the J-mod with no chip. Other then that, everything works fine, and I have no issues with it shifting. I HATE THESE TRANNIES!!!

Thomas

1989 Cougar XR7 - 13.21 @ 102.29 -SOLD-
1993 Thunderbird SC -Awaiting Suspension-
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1996 Thunderbird Sport 15.57 @ 89.42 -Retired @ 258k-
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post #2 of 11 (permalink) Old 06-15-2004, 07:15 AM
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My thunderbird is doing that now also after installing my PI converter, feels like the converter is locking then unlocking then locking and unlocking again, only happens in the 25-40mph range.
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post #3 of 11 (permalink) Old 06-15-2004, 11:39 AM
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I'd check with the chip makers, IMO that's likely the root problem.

96 Mustang GT 5spd. w/ 248A Option (GTS). Stock for now until I get the Roush on.

97 Thunderbird 4.6L LX /w Sport Package
24k B&M Cooler, 1" lowered, Steeda UD Pulleys, Dynomax cat-back, J-mod, 3.73's, PI intake, PI cams, 03 GT MAF/Tube, SCT tuned - Gone but not forgotten.
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post #4 of 11 (permalink) Old 06-15-2004, 07:33 PM Thread Starter
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I'd check with the chip makers, IMO that's likely the root problem.
I would agree with that, however my 1997 Sport did the exact same thing and it didn't have any sort of tune or chip in it at all. Like Rancher said, it feels like the TC is locking and unlocking very quickly. Mine will do it about 3 or 4 times and then nothing. Today I noticed it did it right when it shifted out of OD and into 3rd, right around 30mph.

Thomas

1989 Cougar XR7 - 13.21 @ 102.29 -SOLD-
1993 Thunderbird SC -Awaiting Suspension-
1994 Mark VIII - 14.85 @ 93.95 -SOLD-
1996 Thunderbird Sport 15.57 @ 89.42 -Retired @ 258k-
1997 Thunderbird LX AED -SOLD-
1997 Thunderbird Sport 15.71 @ 86.89 -SOLD-
1997 Mark VIII LSC 12.97 @ 112.15 -SOLD-
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post #5 of 11 (permalink) Old 06-15-2004, 08:49 PM
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I think it might be the fact that the tranny is shifting in and out of overdrive at the speed you're running. Have you tried driving with the o/d off? Just a thought.

Joe

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post #6 of 11 (permalink) Old 06-15-2004, 11:26 PM Thread Starter
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I'll give that a try tommorow and see if it does it. Do you have any idea what might cause it to shift from 3rd to OD and back like that?

Thomas

1989 Cougar XR7 - 13.21 @ 102.29 -SOLD-
1993 Thunderbird SC -Awaiting Suspension-
1994 Mark VIII - 14.85 @ 93.95 -SOLD-
1996 Thunderbird Sport 15.57 @ 89.42 -Retired @ 258k-
1997 Thunderbird LX AED -SOLD-
1997 Thunderbird Sport 15.71 @ 86.89 -SOLD-
1997 Mark VIII LSC 12.97 @ 112.15 -SOLD-
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post #7 of 11 (permalink) Old 07-26-2004, 11:20 PM Thread Starter
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I realized that I never replied back here. I locked out OD and it still did it, so it's not the tranny shifting from 3rd to OD and back. It seems like the TC is locking and unlocking, but why?

Thomas

1989 Cougar XR7 - 13.21 @ 102.29 -SOLD-
1993 Thunderbird SC -Awaiting Suspension-
1994 Mark VIII - 14.85 @ 93.95 -SOLD-
1996 Thunderbird Sport 15.57 @ 89.42 -Retired @ 258k-
1997 Thunderbird LX AED -SOLD-
1997 Thunderbird Sport 15.71 @ 86.89 -SOLD-
1997 Mark VIII LSC 12.97 @ 112.15 -SOLD-
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post #8 of 11 (permalink) Old 07-26-2004, 11:42 PM
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If the trans detects that the clutch is slipping it will unlock it.


If it didn't do it before the chip then call the person who made your chip.


If not, try replacing the TCC solenoid.
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post #9 of 11 (permalink) Old 07-27-2004, 12:24 AM Thread Starter
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If it didn't do it before the chip then call the person who made your chip.
My 1997 Sport did the exact same thing right after the J-mod and it never had a chip in it, so I don't think that would be a cause?

Thomas

1989 Cougar XR7 - 13.21 @ 102.29 -SOLD-
1993 Thunderbird SC -Awaiting Suspension-
1994 Mark VIII - 14.85 @ 93.95 -SOLD-
1996 Thunderbird Sport 15.57 @ 89.42 -Retired @ 258k-
1997 Thunderbird LX AED -SOLD-
1997 Thunderbird Sport 15.71 @ 86.89 -SOLD-
1997 Mark VIII LSC 12.97 @ 112.15 -SOLD-
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post #10 of 11 (permalink) Old 07-27-2004, 01:16 PM
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It's still not normal and it's creating more heat, etc. Don't know why it would do that though... maybe the TCC is going.

96 Mustang GT 5spd. w/ 248A Option (GTS). Stock for now until I get the Roush on.

97 Thunderbird 4.6L LX /w Sport Package
24k B&M Cooler, 1" lowered, Steeda UD Pulleys, Dynomax cat-back, J-mod, 3.73's, PI intake, PI cams, 03 GT MAF/Tube, SCT tuned - Gone but not forgotten.
MAMN12 Drag Racing Team [email protected] In need of updated times.
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post #11 of 11 (permalink) Old 07-27-2004, 07:13 PM
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Well, disconnect the TCC solenoid, pull the chip, reset the PCM, then see if it does it. If not, start by reconnecting the solenoid. Then see if it does it. If not then put the chip in, see if it does it after that.
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