jomac0321

2011 Silverado z71 when I put it in 4x4 I get some type of binding either the front end is locking up causing the rear to spin and hop or something is locking/hopping in the rear. I thought maybe it had mismatched gears because the rearend had junkyard stamps on it but I pulled the cover today and counted the teeth on ring and pinion and it has the same ratio that the rpo says it’s supposed to have 3.42. I’m not sure how I could check the front without dropping the whole diff and splitting it open. Also when this happens the traction control light is flashing the whole time even when I press and hold and turn it and stabiltrak off. Same tire size front and back with only 3 week old tires. It does have a 3” lift but the cv angles don’t look bad at all. There are no tccm codes coming up either.Any help on anyone who has experienced something like this would be appreciated or if anyone knows of a stamp on the front diff anywhere so I could verify it’s the same ratio as the rear. Thanks

Has anyone out there used the Bully Dog GT, and if so how well does it work with the 07-13 Silverado/seirras? I know that HP Diablew and BB are the best, but this is what my fiancé got me for a anniversary present so I'm just wondering if anyone has expiernce with them good or bad, and if they can do any damage to the eco/tcm, whether or not they will reduce torque management, and if you can get a good custom tune with one, I know the website says it will hold 10 custom tunes, but I read online that bulldog stopped supporting custom tunes, any information on them would be greatly appreciated it will be going on a 2011 Silverado 5.3

It does kinda feel like it is transmission related, but im hoping it can be tuned and the shift patterns be changed or tweaked a little and fix it because I can put it in tow haul where the patterns change and it runs great for the most part there’s still a partial engine stutter but that’s rare and it always shifts smooth as can be no flares or hard shifts or any clunking, and I crawled up under and looked at everything and honestly compared to the rest of the undercarriage the transmission looks new, but idk. I figured I’d call the shop that done the transmission service and see if they can pull up records on why they don’t what they did.

And I just changed the oil with dexos rated castrol high mileage

There’s no lifter noise or anything like that, the truck has 211,000 on it. Right before I got it the carfax shows the transmission fluid was changed filter changed and then about a month later shows the transmission cooler being flushed. It runs better in manuel mode, and it run perfect like it should in tow/haul mode, accept it will downshift to soon and it will jerk the truck back some and shoot the rpm’s up real high, but upshifts perfect. It did show a misfire on #8 once but went away on its own as soon as it came but I replaced the plugs anyway with pregapped ac delco ones. And the only other code it’s ever showed was for map sensor and I replaced that but it didn’t change anything

And no it was a paper oil filter

It showed a code for map sensor when I got it, but I replaced it with a new map sensor the next day and it didn’t help and I cleaned the maf sensor, that didn’t help much, a little but not much, and I changed the spark plugs as soon as I got it with ac delco pre gapped plugs all wires are on good, but I got a code once for a miss fire on 8 but it went away as soon as it came and that was before I changed plugs and it hasn’t came back since

I just bought a 2011 Silverado 1500 LT 5.3L z71 it has the 3.42 gears. When ever I try to take off from a low speed/rpm’s the engine hesitates and just feels like it’s being held back til it hits over 2500rpms if I try to turn slow and go up a hill it will bog all the way up the hill unless I put it in Manuel mode and drop a gear to raise my rpms, it almost feels like it’s just in to high of a gear but there is still a hesitation when taking off its like the rpm’s get stuck for a second at a certain spot then it catches another thing idk if it’s related is when I put it in gear and let off the brake it will slowly accelerate on its own. When I bought it it showed code for map sensor replaced that no change, I updated driver side valve cover for new pcv design cause after first time I drove it home when I cranked back next morning it blew smoke and could smell oil, new cover fixed that though. Everything on live data looks good and no codes except when it hesitates/bogs the spark advance is I’ll drop to between -1 and -6.5. Thought maybe cats stopped up so I removed them with no change. Anyone that can help give insight please let me know

I just bought a 2011 Silverado 1500 LT 5.3L z71 it has the 3.42 gears. When ever I try to take off from a low speed/rpm’s the engine hesitates and just feels like it’s being held back til it hits over 2500rpms if I try to turn slow and go up a hill it will bog all the way up the hill unless I put it in Manuel mode and drop a gear to raise my rpms, it almost feels like it’s just in to high of a gear but there is still a hesitation when taking off its like the rpm’s get stuck for a second at a certain spot then it catches another thing idk if it’s related is when I put it in gear and let off the brake it will slowly accelerate on its own. When I bought it it showed code for map sensor replaced that no change, I updated driver side valve cover for new pcv design cause after first time I drove it home when I cranked back next morning it blew smoke and could smell oil, new cover fixed that though. Everything on live data looks good and no codes except when it hesitates/bogs the spark advance is I’ll drop to between -1 and -6.5. Thought maybe cats stopped up so I removed them with no change. Anyone that can help give insight please let me know

I just bought a 2011 Silverado 1500 LT 5.3L z71 it has the 3.42 gears. When ever I try to take off from a low speed/rpm’s the engine hesitates and just feels like it’s being held back til it hits over 2500rpms if I try to turn slow and go up a hill it will bog all the way up the hill unless I put it in Manuel mode and drop a gear to raise my rpms, it almost feels like it’s just in to high of a gear but there is still a hesitation when taking off its like the rpm’s get stuck for a second at a certain spot then it catches another thing idk if it’s related is when I put it in gear and let off the brake it will slowly accelerate on its own. When I bought it it showed code for map sensor replaced that no change, I updated driver side valve cover for new pcv design cause after first time I drove it home when I cranked back next morning it blew smoke and could smell oil, new cover fixed that though. Everything on live data looks good and no codes except when it hesitates/bogs the spark advance is I’ll drop to between -1 and -6.5. Thought maybe cats stopped up so I removed them with no change. Anyone that can help give insight please let me know