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How long will 4L70E Last?

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Old Jul 3, 2007 | 12:46 AM
  #1  
h20junkie's Avatar
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Default How long will 4L70E Last?

Hey everyone

I'm picking up a 07 VortecMax truck, extended cab, 4x4, 3.73 and am curious about how much abuse the tranny will take.

Since I don't want to dish out the cash to get a Denali, I'm planning to do a bunch of quick mods to the truck along the lines of:

GMPP intake
Corsa catback exhaust
Long tube headers
Computer Tune

This truck will never see any racing at the track, but I just want more get up and go since I'm switching over from an SRT8 Jeep (which is for sale, PM me if you're in Alberta and curious). With just street duty, abit of towing and some full throttle runs a few times a week how long until the transmission bites the dust?

Last edited by h20junkie; Jul 3, 2007 at 12:58 AM.
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Old Jul 3, 2007 | 01:49 PM
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Colby 04's Avatar
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That's like asking how long you'll live...

"I eat a few cheeseburgers a week, drink beer and smoke occassionally.....how long will I live?"

who knows
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Old Jul 3, 2007 | 02:02 PM
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.T.'s Avatar
.T.
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36k on the clock.
20k with mods in sig. 381hp at the wheels NA.
Still running and I wish it would die. But, like Colby said, there's no way to call it.
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Old Jul 3, 2007 | 02:04 PM
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tommorow
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Old Jul 3, 2007 | 02:08 PM
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h20junkie's Avatar
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Originally Posted by Colby 04
That's like asking how long you'll live...

"I eat a few cheeseburgers a week, drink beer and smoke occassionally.....how long will I live?"

who knows
Haha, I'm just curious based on peoples experience with modded/stock trucks. I'm seeing a few guys running around with FLT transmissions and a minimal level of modding so I'm figuring that the transmission is going to **** the bed pretty quickly.

The 4L60E in my 2005 Z71 was slipping from day one and left a bad taste in my mouth. My dealership said it was normal operation and wouldn't touch it.
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