mossheg

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?

country_09

4.8s are just as reliable as a 5.3. Taken care of they last forever, the trans will go out before motor will

slepley

'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

country_09

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

slepley

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

slepley

Any idea what a new 4L80E would cost..a new one just the unit not the labor?

country_09

Eh possibly 1k or so depending on the area you're in