Rebuilt transmission life expectancy? - Dodge Cummins Diesel Forum

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post #1 of 6 (permalink) Old 01-01-2010, 09:43 AM Thread Starter
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Rebuilt transmission life expectancy?

Hey, wanted to get some ideas of what to expect. I have a 97 2500 4x4 with a nv4500. I bought it with 325K and the tranny was pretty trashed, mainly because of low/bad oil.

How long can you expect a rebuild to last? Are they less reliable than factory, about the same, or better?

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post #2 of 6 (permalink) Old 01-01-2010, 09:46 AM
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Mine has 320k and its fine. If your taking care of it now, you should never have a problem again.

1990 F250 7.3 IDI NA auto 4x4 250k
1997 2500 12V Cummins 5spd 2wd 322k miles #100 plate, SB Con O, 26.6MPG-55mph
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post #3 of 6 (permalink) Old 01-01-2010, 03:59 PM
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Quote:
Originally Posted by illflem View Post
A factory tranny would be a waste of money.
Get a built up tranny and it will last much longer than one from the factory.
Check here Goerend Transmission Incorporated
He's not talking about an auto, he's talking NV4500.

I guess my thoughts are.. if you keep the fluids clean, it should last forever. If you plan on not checking or changing the fluid, then you should also plan on trashing another tranny. Sounds like there was nothing wrong with the trans.. the operator was at fault.

The NV4500's are built to last. AFAIK, the stock clutch and the 5th gear nut are the only weakpoints.

98' 12v QCLB 4x4 216k, S363/68/.83 + S478/87/1.1, Steed T4 manifold + JGS gate, Levi's Blankets, A1 studs, Goerend, 5x18 SAC, 042DV, 2095, 4GSK, TerraG 295/17's on 4thGen 6-spokes
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post #4 of 6 (permalink) Old 01-01-2010, 04:12 PM
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It sounds like a person as SMART as you would realize nothing last forever even with proper service...
But it sure can extend the life of alot of things.....
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post #5 of 6 (permalink) Old 01-01-2010, 05:15 PM
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Originally Posted by jr1187 View Post
It sounds like a person as SMART as you would realize nothing last forever even with proper service...
But it sure can extend the life of alot of things.....
Okay smart-a$$... as if I meant "forever" literally.
It's a figure of speech for a very long time.
I'm by no means a know-it-all. Never said I was.

If Howard Clayton managed to get 1.4 million miles out of one NV5600, and it still works perfect... then I would consider that "forever" enough to call it forever.

Once you fix the 5th gear nut on a NV4500, it shouldn't live any shorter a life than an NV5600.

Even with proper service, there are things you shouldn't do while driving... things that will damage an NV4500... like repeatedly using your clutch to slow you down. Or pulling a 20,000Lb trailer up a hill in 5th gear at WOT.

And just because your O/D bearing went out doesn't mean you need a new NV4500. So you R&R it and your tranny is back in business. It's not like you need a replacement!

In Phantom's original post, he said his tranny was "trashed" after 325K miles. That would lead one to believe he needs a replacement, not a rebuild.

325K would be a lot of miles on a stock 47re/rh automatic, but that's quite a short life for a NV4500.

98' 12v QCLB 4x4 216k, S363/68/.83 + S478/87/1.1, Steed T4 manifold + JGS gate, Levi's Blankets, A1 studs, Goerend, 5x18 SAC, 042DV, 2095, 4GSK, TerraG 295/17's on 4thGen 6-spokes

Last edited by Algae Eater; 01-01-2010 at 05:19 PM.
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post #6 of 6 (permalink) Old 01-01-2010, 06:31 PM
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I can tell you are alot smarter then most people here so I will let you win this waste of an argument.
Hava a great New Year...
And FOREVER means FOREVER to some.
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