00silverado17

Hey y’all, this is my second post on this forum. I just picked up a 2000 Chevy. 5.3 4l60e (I know shocking) and the guy claimed to have put a rebuilt trans in the truck, well then he claimed it was the second one he put in, in just a couple months. My guess is bad mechanic. Anyways. The trans shifts fine when it’s cold. All gears work perfect (which is when I test drove it) well when the truck warms up (roughly 150-190 when it starts) the trans slips in all gears, UNLESS it’s between 2500-3700 rpm. It grabs good then. I noticed it because I’ll start going from a red light, it’ll slip a bit and I’ll have to put more gas into it, and then it hits about 2500 rpm and it’ll grab and take off then when it hits about 3700 rpm it’ll start slipping again. It does this in every gear. At first I was thinking the trans pump thinking it wasn’t getting enough lubrication to all the parts. But then I thought it was low on fluid, well it’s fine on fluid. Then I thought maybe it was the converter because it’s the same one from the first rebuilt trans (supposedly). I’ll drop it off at a shop in a few days. But I’m sure I’m looking at a rebuild? I’m wanting to swap in a 6.0 over the summer, so I’m guessing I should go ahead and have a built one dropped in? Shift kit with vette servos? That’s what I keep hearing to do. Or should I just deal with it for now and wait for it to blow completely and do the whole engine and trans swap at the same time? Sadly I’ll have to pay someone to do it all for me cause I don’t have the tools or space to do it. But this 5.3 is also having “worn out” issues with oil pressure, as it’s the original with 262k on it (with a gasket rebuild on it supposedly). Thanks for the input in advance!!

Ok, I had heard that 04+ would be better because of the aluminum heads and shorter crank snout to clear the oem radiator? And ok so it would be better to just wait and save up the money to swap the gear ratio and add a limited slip rather than just swap a whole axle right now? Thanks for the input

Hey y'all, I know this has been talked about a bunch but I just for some reason can't find the info I'm after. I have a 2000 Chevy Silverado 1500, with the 5.3 and 4l60e, its a non z71 but with the same gear ratio I believe. Now I have a couple questions. 1. I want to swap to a 6.0 (maybe with some mods like a small cam, headers, maybe an intake), the 5.3 in the truck has been rebuilt but was used as a work truck and is "tired" so to say. I know a lot of people have said that to make the simplest "plug-and-play" setup to grab a 6.0 from 04-06(07 classic?) and it will run on the stock 5.3 tune (but recommend getting it retuned) I know that you can use the stock 4l60e but put some money into it to make it be able to hold the power and torque of a 6.0. I also know that to swap to a 4l80e trans it would require a crossmember and wiring at least, along with a different driveshaft, and since its 4x4, possible a different transfer case? So answering my own question with confirmation from someone, I could use a 04-06(07 classic?) 6.0 and just do a slight build on the stock 4l60e (which is currently slipping hoping just torque converter)? So on to my next question, I want to swap a z71 axle under the truck rather than the stock open diff. Would it be easier to swap out just the diff or to swap the whole axle? Is there any wiring for the limited slip/locking diff in the z71 axle? And is there a difference in the front diff? Also the truck currently is on 33" tires, and I plan to go to 35"s so should I just wait and have the truck regeared with an aftermarket limited slip or locker? And one final question for the interior guys out there. I hate the 99-02 steering wheel. I wanna swap to a 03-06 steering wheel. I know that the airbag itself will fit if I grab it off a 03-04 HD truck because its single stage, but what about the splines on the steering shaft? are those the same as the 99-02 1500 trucks? Or do I still have to swap that out for a newer steering shaft? Also how bad is it to run heated leather seats in these trucks that didn't have them from factory? I'm doing a mini restobuild on the truck but still need it to be a daily driver. Thanks for any input guys!!!