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C5 tranny reliability??

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Old Dec 17, 2014 | 07:43 PM
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Default C5 tranny reliability??

Been looking ata lotta early C5s and was leaning towards a stick, but lately am also considering an auto. question is what is the reliability of an automatic and how well do that hold up, thanx
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Old Dec 17, 2014 | 08:46 PM
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Originally Posted by riversidedan1
Been looking ata lotta early C5s and was leaning towards a stick, but lately am also considering an auto. question is what is the reliability of an automatic and how well do that hold up, thanx
The automatic on my 2003 had to be rebuilt at about 85,000 km (52,000 miles). People are telling me that is unusual. The transmission shop had no real explanation other than "bad luck". I am the third owner and the car seemed well cared for but you never know how previous owners treat them I guess.
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Old Dec 17, 2014 | 09:09 PM
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IMO, a lot depends on how well the car is maintained and the driving habits of the owner. Constant harsh treatment, as with anything mechanical, can cause premature wear and breakage.
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Old Dec 17, 2014 | 09:27 PM
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They're all terrible. Prepare to spend $$$
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Old Dec 17, 2014 | 10:30 PM
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Originally Posted by wolf8218
They're all terrible. Prepare to spend $$$
Not true.
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Old Dec 18, 2014 | 12:56 AM
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Originally Posted by Mr.Bill
Not true.
maybe you can tell us why
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Old Dec 18, 2014 | 02:14 AM
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Originally Posted by riversidedan1
maybe you can tell us why
There are a lot of A4 trans that are still going with out any issues what's so ever. Unless you race your car and the 6 speed also can have issues.
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Old Dec 18, 2014 | 07:40 AM
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Originally Posted by Vetteman Jack
IMO, a lot depends on how well the car is maintained and the driving habits of the owner. Constant harsh treatment, as with anything mechanical, can cause premature wear and breakage.


it is a function of how much abuse they have had
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Old Dec 18, 2014 | 09:29 AM
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4L60s always go to an early grave.

T56s seem fairly reliable but have some issues here and there as well.
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Old Dec 18, 2014 | 01:33 PM
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Originally Posted by Black 02
4L60s always go to an early grave.
I'm guessing that you're using rather non-standard definitions for "always" and "early".
The large number of high-mileage C5s still on their original un-rebuilt transmission makes your statement either sarcastic or silly.
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Old Dec 18, 2014 | 01:43 PM
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For me anyway, transmissions seem to be the only part that doesn't fail in any of the cars and trucks that I've owned over the years.

The TH350 I had in my C10 truck lasted over 100K miles and I expect my A4 to last just as long.
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Old Dec 18, 2014 | 01:59 PM
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Originally Posted by Lee DeRaud
I'm guessing that you're using rather non-standard definitions for "always" and "early".
The large number of high-mileage C5s still on their original un-rebuilt transmission makes your statement either sarcastic or silly.
I'm leaning towards stoooopid
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Old Dec 18, 2014 | 01:59 PM
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Originally Posted by Lee DeRaud
I'm guessing that you're using rather non-standard definitions for "always" and "early".
The large number of high-mileage C5s still on their original un-rebuilt transmission makes your statement either sarcastic or silly.
Usually they die around 100k miles give or take. My 2005 Sierra is on its third 4L60 and the second one was "built" by a local performance shop. Granted that truck is heavy and probably harder on a transmission than a 3200 pound corvette, but I come from the truck world where the 4l60 is regarded as junk.

The amount of torque management GM has to add to protect them during their 100k power train warranty says everything you need to know about the transmission. For what it is worth, my truck has 0% torque management.
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Old Dec 18, 2014 | 02:57 PM
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Mine has been very reliable, close to 160,000 miles on it now, and it has been going to the track for over 6 years... hundreds and hundreds of track passes ( and it has stretched it's legs on the street for almost 10 years). No problems so far
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Old Dec 18, 2014 | 05:34 PM
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Originally Posted by vettestream
Mine has been very reliable, close to 160,000 miles on it now, and it has been going to the track for over 6 years... hundreds and hundreds of track passes ( and it has stretched it's legs on the street for almost 10 years). No problems so far
How many times have you changed the fluid?
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Old Dec 18, 2014 | 05:45 PM
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Originally Posted by jjaaam
How many times have you changed the fluid?
I've changed the fluid twice
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Old Dec 18, 2014 | 07:07 PM
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My A4 got it's first fluid change at 74,000 miles when I bought the car.

Now at 97,000 miles, I've done 9 road course track days, over 700 miles at WOT or hard on the brakes.

I drive sedately on the street "most" of the time.

But I run Redline fluid and change it and filter every two years because of track use.

Because the A4 is challenging to keep cool on a road course track, I also have an extra capacity B&M finned aluminum transmission pan, a DeWitts aluminum radiator with integral trans cooler and an auxiliary transmission cooler with fluid thermostat.

It is fine so far.
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Old Dec 18, 2014 | 10:18 PM
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I had 130,000 on mine and had it rebuilt, guy said it probably had another 10,000 in it, but since it was already out I had it taken care of.
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Old Dec 18, 2014 | 11:17 PM
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I ran 600 HP through mine for several years until I went with an RPM level V. I drove it the way the car was meant to be driven and it never missed a beat. I only did the level V because I was in there doing a converter and 3:42. The trans looked like new and probably would have gone several more years.
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