Strange 96 4R70W problem - TCCoA Forums
 
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post #1 of 14 (permalink) Old 05-17-2005, 01:04 PM Thread Starter
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Strange 96 4R70W problem

My daughter's 96 4.6 bird did something strange lately and I was wondering if anyone could shed some light on the situation...

All was fine when she parked it one day last week. The next morning she pulled out of the driveway on her way shcool, but the transmission wouldn't shift into 3rd gear. Instead it would slip and wouldn't catch 3rd under any condition.

I know the 4R70W trannies have thier share of problems, and this tranny does have 160K on it, but I thought they pretty much worked out the bugs in the 96 and it was supposed to last just fine.

I was thinking it might be an old-style accumulator problem, but I thought the 96 models had the new accumulator pistons. It already has the deep sump.

Any hints, ideas, suggestions, low-dollar solutions?

Thanks...

Glen "RustyUL" Weldon

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post #2 of 14 (permalink) Old 05-17-2005, 03:49 PM
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slipping? if its slipping then the band sounds toast to me.
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post #3 of 14 (permalink) Old 05-17-2005, 04:10 PM
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Quote:
Originally Posted by FunktasticLucky
slipping? if its slipping then the band sounds toast to me.
Do a little more homework, there is no band for 3rd


As for your problem.......is it shifting, just not grabing enough to move?
Have you checked teh fluid level?
If you floor it in 2nd up to 45mph or faster, let off, will it go into OD? It should.

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post #4 of 14 (permalink) Old 05-17-2005, 05:19 PM Thread Starter
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Don't know what it will do. The car is 100 miles from me with my daughter. She has just described what the symptoms are. Thanks for the reply...

Glen "RustyUL" Weldon

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post #5 of 14 (permalink) Old 05-17-2005, 05:29 PM
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If no 3rd at all, it may be shift solenoid 2. If it shifts into 3rd and then actually slips, fried direct clutch.
Does it get overdrive, and if so does it slip there too?

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post #6 of 14 (permalink) Old 05-17-2005, 10:40 PM
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The 2-3 accumulator/spring could be damaged. This can cause a real late/missing shift. OR it could be shelled. Too bad you can't get to it easily...

Dad always said,"Knowledge is limited but stupidity knows no bounds."
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post #7 of 14 (permalink) Old 05-18-2005, 02:31 AM
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2-3 spring will not cause a late or missed shift

no 2-3 spring or half a spring will firm the shift up.. most of us don't have one

2-3 piston is really easy to get to
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post #8 of 14 (permalink) Old 05-18-2005, 07:28 AM Thread Starter
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I was thinking a fried 2-3 piston, but I was also thinking that the 96 models came with the stamped/bonded piston from the factory. Does anybody know for sure?

Glen "RustyUL" Weldon

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post #9 of 14 (permalink) Old 05-18-2005, 01:25 PM
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Quote:
Originally Posted by rustyul
I was thinking a fried 2-3 piston, but I was also thinking that the 96 models came with the stamped/bonded piston from the factory. Does anybody know for sure?
My car has a Ford Reman unit. The previous owner had it put in in 2000. I found the rebuild plate glued to the side of it and gave Dan a call with the numbers from the plate. He said it was a remaned 96 model.

When doing the j-mod, the 1-2 was updated, but the 2-3 was not.
So, my answer to your question is NO, not all 96+ trannies got the updated pistons.

Hope that helps,
Rob

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post #10 of 14 (permalink) Old 05-18-2005, 01:45 PM
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The accumulator pistons won't have anything to do with the late/missed shift - all they do is make the shift softer. Am i wrong? Can't you just remove the pisont completely and STILL run just fine? I know you can eliminate the spring.

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post #11 of 14 (permalink) Old 05-18-2005, 03:35 PM
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umm the Springs are what do the firmness... I believe you have to have the accumulators. But I'm just a nub so yeah LOL.
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post #12 of 14 (permalink) Old 05-18-2005, 03:37 PM
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piston is necessary.. spring is not... spring provides a sprung force to smooth out the shift

no piston, i believe it is just direct fluid flow.. that bad
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post #13 of 14 (permalink) Old 05-18-2005, 06:37 PM
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96 trannies ONLY got the deeper pan...no other "typical" upgrades other than a re-designed/improved valve body(over pre-96 models)

therefor, the 1-2 would have come with the old style piston, as well as the 2-3.

But, you need to disregard(forget about) the 2-3 piston for a while.

Use Jerry's scratch pad for more testing procedures. email your daughter some advice, translated into your own words, from this link.

http://www.tccoa.com/articles/tranny...on/page4.shtml

have her try the "test drive"...get the car up to 45 in manual second, and lift off the throttle.
then ask her if there is engine braking(slowing down) like a manual tranny would in the same situation.

You need more info... does it have 4th gear?

But foremost... ask her if she is 100% positive she was in DRIVE, not manual second. (very common)
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post #14 of 14 (permalink) Old 05-19-2005, 07:18 AM Thread Starter
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Thanks Blackicelsc for the post. I'm going to try to test drive the car on Saturday myself instead of trying to explain mechanical things to a young female. If the symptoms she explains are correct, looks like the direct and/or one way clutch are burnt up...replacement time.

Glen "RustyUL" Weldon

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