How reliable is a 4.8L? - Chevrolet Forum - Chevy Enthusiasts Forums

How reliable is a 4.8L?


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Join Date: Nov 2010
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February 5th, 2012, 11:12 AM   #1  
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How reliable is a 4.8L?

I own four 5.3l trucks, all reliable, running like champs. However, I was looking to buy another, and it comes at a steal. 2003 Silverado Extended (Quadrasteer), with a 4.8l V8. The truck has 271,000 miles, but at the price, I'm willing to replace engine (w/ a 5.3) & transmission. Has anyone seen how far these things will go?

 
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Highlands

February 5th, 2012, 12:42 PM   #2  
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4.8s are just as reliable as a 5.3. Taken care of they last forever, the trans will go out before motor will

 
Join Date: Dec 2011
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Rhode Island

February 5th, 2012, 3:12 PM   #3  
CF Junior Member
'09
From the perspective of a preventative viewpoint, what type of repairs or upgrade or mod's could one have done on a 4.8L TRANSMISSION, BEFORE it breaks down or starts to act up.
Does one buy a new transmission for that engine. As I've stated before, I eventually want to replace my 4.8L with the Cadillac 6.0L..In the interim, I am thinking of a mod on my tranny. Any ideas on replacing my stock tranny on the 4.8 L with a newer, more powerful tranny which will eventually be ok for the 6.0 L.
Let's pretend that the costs for the tranny and labor are free !! What tranny would YOU select for my Silverado.
Thanks

 
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February 5th, 2012, 5:13 PM   #4  
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4L60e is what you have now, you could either get a built unit with servos, clutch packs, shift kit, and what not or get a 4L80e with come behind a 6.0 stock. Although the 4L60e is behind a buddy of mines built 6.0 pushin prolly 380 hp and his tranny is all stock besides a vette servo and is holdin up very well so some tranny's are freaks and last to any abuse to put it too, some break down at the press of a gas pedal

 
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Rhode Island

February 6th, 2012, 9:35 AM   #5  
CF Junior Member
4L80E sounds like a logical choice for me since I may eventually go to the 6.0L.
Thanks for this info..as usual you really know your stuff.
S

 
Join Date: Dec 2011
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Rhode Island

February 6th, 2012, 9:36 AM   #6  
CF Junior Member
Any idea what a new 4L80E would cost..a new one just the unit not the labor?

 
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Highlands

February 6th, 2012, 10:07 AM   #7  
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Eh possibly 1k or so depending on the area you're in

 
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