I am buying a 98 Silverado Z-71 4x4 with 160K on the body & tranny, I think the original engine was the 5.3, or possibly the 4.8 - In either case, should I worry about the transmission handling the 350 ft/lb or torque versus the 305-335 ft/lb of it's original engine? Your input is appreciated, thanks!
Ok, so lets say it was either of the smaller options... probably the 5.0, is the extra torque from the 5.7 going to be a problem on the tranny, or did they use the same tranny on both to begin with?
hello the 5.7L had 4 o2 sensors and the 5.0L had 3 o2 sensors on the exhaust. This also was my debate on when i put a engine on my truck if the 5.7 would work but i think you would have to change the 02 senzors for the computers to make the truck run right
Ok, so lets say it was either of the smaller options... probably the 5.0, is the extra torque from the 5.7 going to be a problem on the tranny, or did they use the same tranny on both to begin with?
There is a RPO Label in the glove box with the original engine and trans codes, look for anything beginning with an L for the engine codes, L05 for instance. Trans code begin with M, axle codes begin with a G.
Thank you for the answer to my question Z15! The new engine is already in the truck and working very well, just wanted to make sure it wasn't a long term strain on the tranny, thanks y'all!
It might be the original engine size, but the guy I'm getting it from put a new engine in it built by a local engine/machine shop. I just assumed he went the biggest he could and I also thought the 1500 only went up to the 5.3 so I guess i'm way off but either way I think it's gonna be a great truck! If all goes to plan I'll be picking it up on Saturday.
So yeah it is originally the 5.7 and was rebuilt bottom to top with all brand new parts, crank, bearings, heads, pistons, etc. and was bored out so it's a little bigger now. So why isn't there a sub-forum here for the 5700 engine?
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