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post #1 of 11 (permalink) Old 05-06-2010, 04:48 PM Thread Starter
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Question Transmission work?

How long (mileage please) are most of your transmissions lasting before needing major work or overhaul done ?

I'm almost at 115k and the tranny does the job but it does have some issues.

1996 Thunderbird LX
3.8L V6
Stock
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post #2 of 11 (permalink) Old 05-06-2010, 05:20 PM
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It's all relative to how regular the maintenance was, how cool the fluid was kept, and how much abuse it takes. I've seen 4R70Ws go for 250k+ miles and I've seen them die at less than 60k miles.

--Chris

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1996 Thunderbird LX
Awaiting some tender deconstruction...
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post #3 of 11 (permalink) Old 05-06-2010, 07:47 PM
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1994 - 77k miles, too many neutral drops, went out with a BANG

1995 - 55k miles, ran low on fluid then overfilled ( not me ) = roller clutch blown

1997 - 155k miles, lasted a good while and started slipping then lost 3rd gear completely .. driving on the freeway in 2nd gear after that
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post #4 of 11 (permalink) Old 05-06-2010, 09:23 PM
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165,000 before losing all gears one at a time with a 90 AOD
210,000 on a 91 AOD that is fine other than not shifting past second
180,000 on a j-modded 96 4R that hasn't shuddered even once yet
215,000 on an unmodded 94 4R that shifts slower than it should but otherwise acts fine

Needs more stall.
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post #5 of 11 (permalink) Old 05-07-2010, 02:36 AM Thread Starter
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Thanks all !
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post #6 of 11 (permalink) Old 05-08-2010, 10:31 AM
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A guy on the Lincoln forum had all service records from a salesman's town car that he bought with very high miles. It was serviced at 30K intervals with mercon V, large cooler, and all the minor issues were taken care of. The trans lasted until 500K! The engine is still stock fully stock except for new valve seals. This would be the same drivetrain as a 95 bird.

Last edited by tbirdguy; 04-07-2012 at 12:15 PM.
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post #7 of 11 (permalink) Old 05-08-2010, 07:39 PM
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1996 4r70w just switched to Mercon V, no major issues to report at 153K miles(knock on wood!!).

John
1996 TBird LX 4.6
2001 Sable Wagon 3.0 Duratec
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post #8 of 11 (permalink) Old 05-08-2010, 07:53 PM
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the 3.8s had 4R70Ws? I was unaware.

-John

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post #9 of 11 (permalink) Old 05-08-2010, 10:34 PM
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135k mi. and still barking tires because I can't keep my foot out of it. J-modded four years ago, no cooler.
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post #10 of 11 (permalink) Old 05-09-2010, 09:12 AM
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Quote:
Originally Posted by 94MN1246 View Post
the 3.8s had 4R70Ws? I was unaware.

-John
Yes they did, but I believe they differ from the V8 units by less clutch discs in the pack.

Last edited by tbirdguy; 04-07-2012 at 12:15 PM.
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post #11 of 11 (permalink) Old 05-09-2010, 01:35 PM
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170K before it lost 2nd gear. It was fun driving the car for a week holding first gear out so that it would "skip" into 3rd.
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