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4.8 swap to 6.2, some help!

Old 11-23-2015, 08:58 PM
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Exclamation 4.8 swap to 6.2, some help!

Whats up everyone.
I already have a 2008 Silverado single cab with 4.8 engine 4L60, RWD . It's just has a corsa exhaust . I want to swap for 6.2 Corvette engine.
What should I change to can use my car everyday and anytime?
also I have another problem. When I drive my car it has a whine in the diff.
So I wanna fix it but I don't know what the problem. It's happen only while moving from 40 to 80 mile . It goes away when I let up on the gas.
Sorry if my language is not perfect enough But I hope you understand me
If anyone can help me I appreciate it.

And also one more question. If I put a 4.10 truetrac posi in the diff, it will solve the problem or no ? and thanks !

Last edited by walidmurad; 11-24-2015 at 03:55 PM.
Old 11-23-2015, 10:17 PM
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Which corvette engine are you planning to put in?

As for the noise in the rear end, i would try to isolate the noise, before swapping anything into it, the best way would be to lift the rear tires off the ground block the front wheels, put the truck in gear and accelerate and use a mechanics stethoscope to try to pinpoint the noise..... The spot that is the loudest will be where the noise is originating from... Also check the u joints.....
Old 11-23-2015, 10:34 PM
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Originally Posted by Wolftrk99
Which corvette engine are you planning to put in?

As for the noise in the rear end, i would try to isolate the noise, before swapping anything into it, the best way would be to lift the rear tires off the ground block the front wheels, put the truck in gear and accelerate and use a mechanics stethoscope to try to pinpoint the noise..... The spot that is the loudest will be where the noise is originating from... Also check the u joints.....
I will put the 2009 corvette engine which is 430 Horse Power.
about the diff, I want to fix it here in US. Because I want to rebuild it and no one in my country know's how to fix it.
Old 11-23-2015, 10:52 PM
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What designation is the engine ls3 ls2, ls7???

Need to figure out exactly where noise comes from to be able to fix the rear diff
Old 11-23-2015, 11:01 PM
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Originally Posted by Wolftrk99
What designation is the engine ls3 ls2, ls7???

Need to figure out exactly where noise comes from to be able to fix the rear diff
It's Ls3 engine.
So you said I can not solve it 'till I find the problem.
If I put the new engine, the diff will break ?
And what about the transmission ?

Last edited by walidmurad; 11-24-2015 at 03:56 PM.
Old 11-23-2015, 11:55 PM
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Cant say it will without knowing the problem... Trans i would at least modify.... Which trans do you have??
Old 11-24-2015, 06:03 AM
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Originally Posted by Wolftrk99
Cant say it will without knowing the problem... Trans i would at least modify.... Which trans do you have??
I have the stock trans which it is 4L60.
Old 11-24-2015, 08:15 AM
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Originally Posted by walidmurad
[/COLOR]. [/B]When I drive my car it has a whine in the diff.
So I wanna fix it but I don't know what the problem. It's happen only while moving from 40 to 80 mile . It goes away when I let up on the gas.
Sorry if my language is not perfect enough But I hope you understand me
If anyone can help me I will appreciate it.

And also one more question. If I put a 4.10 truetrac posi in the diff, it will solve the problem or no ? and thanks !
[/CENTER]
Sounds exactly like mine a few years ago when all of the bearings went at about the same time. I was told most of that whine was the pinion but, it acted just like that. especially on the highway on and off throttle. ended up doing every bearing, ring and pinion (chipped bad from the play), and both shafts.
Old 11-24-2015, 08:29 AM
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Originally Posted by mikeyjm1
Sounds exactly like mine a few years ago when all of the bearings went at about the same time. I was told most of that whine was the pinion but, it acted just like that. especially on the highway on and off throttle. ended up doing every bearing, ring and pinion (chipped bad from the play), and both shafts.
When I turn the music on , I can not hear the whine. But I wanna fix it before the whine get up.
I wanna put the 4.10 truetrac posi but I'm thinknig about the whine.
Old 11-24-2015, 01:15 PM
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If it is rear end bearing noise plan to replace all the bearings anyway and you shoukd be fine

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