Another '95 4R70W going out? - TCCoA Forums
 
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post #1 of 5 (permalink) Old 08-01-2005, 07:17 PM Thread Starter
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Another '95 4R70W going out?

I have read dozens of transmission threads and haven't found anyone that has posted with this situation.
I know, I have an original '95 4R and it is probably going to give out soon since I have an Explorer motor, j-mod and SCT tune. But here's the catch.
It shifts hard and fast like it is supposed to without slipping, but I think that the 6 month old Marauder torque converter is acting strange. If I have it in any gear under ~2K and I give it gas there is a rattling sound. No shudder, no slipping, just the noise. Once I get the RPMs up, the noise goes away. Two more things that are strange:
  1. If I come to a complete stop with the shifter in "2" the engine will be pulled down. Sometimes it will die.
  2. If I come to a complete stop with the shifter in "D" the engine will bog down for a second in 2nd gear, then will shift into 1st and then the car idles fine.
I don't know much about transmissions but my wild guess is the TCC solenoid keeping the torque converter locked when it shouldn't be? Am I close?
One other thing: the SCT tune is for 3.73's which haven't been installed yet. It still has 3.08's. I thought about flashing the EEC back to stock just to see. Do I have to wire my stock MAF back in or will it run well enough to test it?
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post #2 of 5 (permalink) Old 08-02-2005, 12:11 AM
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when you reflash the stock tune back into it, unplug your maf sensor connector so it goes into safe mode(limp mode???) and try it. it will run rich but it is safe, good for testing short period of time.

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post #3 of 5 (permalink) Old 08-02-2005, 09:00 PM Thread Starter
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Thanks Casper. The two problems with the transmission dragging the motor down went away when I returned the EEC to stock, so I guess that is just the problem with having 3.08 gears when programmed for 3.73s.
Unfortunately, the noise is still there so the problem isn't the tune. I took the converter cover off and made sure all the bolts are tight. That was the only other thing that I could think of. Anyone else have any thoughts?
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post #4 of 5 (permalink) Old 08-04-2005, 04:48 PM Thread Starter
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Today on the drive home, the sound almost completely dissappeared. I don't know whether to be happy or worried...
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post #5 of 5 (permalink) Old 04-25-2006, 04:53 PM Thread Starter
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Thread resurrection time!
My car has been running great since the last post. However, this weekend it started making the rattling noise again. I crawled under it today and banged on the cats with my fists and they rattled like mad. I guess it is time to lose the cats. (The 2nd O2's are already programmed out.)
It is weird because it really sounds like a nut or bolt being flung around inside the bellhousing. I am just relieved that it isn't the tranny, even though I already have a 99GT 4R to go in its place.
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