interoir is nicer more driver friendly,
handling a load. the new one can barely hold a candle to the red one.. IMO
red frame height over axle is 32"
green frame height over axle is 36"
4500lb pin weight squats
new one ~5".
old one ~2.5"
spring length is another big difference old/new 56"/64"
wheels/tires 235/85/16 vs 225/70/19.5 while the 19.5 ride little rougher they make up big time in stability and steering response.
brakes system..
old ~14" disc F/R with dual 66mm piston calipers F/R
new ~13" disc F/R with dual 40mm? piston calipers f/r
4l85 and 4.63 gears
allison and 3.73 gears
on a 5% grade the new one dropped to 4th (1:1) to pull it at 60mph with traffic on hills with no traffic i ran 65 in 5th with no signs of lugging 6th is just toooo tall to run hills at 24,000lb
old 4th(OD) and 4.63 is basically mechanically the same as 4th and 3.73 in the alison.
new one is little faster most likely to the extra ~60hp
off line they are roughly the same till about 55 till the longer legs of the new starts walking away
allison and air ride in the rear on the red truck, and i'll park the new one.
when it comes to loaded handling, steering, brakeing, the GMT800 cannot do it nearly as soundly confidently as the GMT455 platform can..
if you plan on DDing more than towing dont get a 455.. it will be the shit out of you lol
i'm not liking the IBC on the 07.5 either made a vent/wtf is is working right?!?! thread about it..
I can believe the handling for sure. We had 3/4 & 1 ton 1990 - 1998's at the farm and it didn't matter how much weight you put on them, they wouldn't move. Not to mention that 1976 3/4 we had with a service bed full of tools and 1000 gallon diesel tank in it. Fill that tank up, throw some extra tools in the back for spring planting or fall harvest and the pickup didn't look like there was anything in there.
I can believe the LMM squatting that much, I'm surprised its not more actually.
Looks like you'll have to swap the wheel's/tires over to the old one being it has much better brakes. I can't believe they've gone backwards on the brakes, it doesn't make sense.
My 03 has terrible brakes & I've flushed the blake fluid & power steering fluid twice. My next steep is to put DOT4 in the brake system, synthetic power steering fluid, and put a cooler on power steering system. Also look into the LMM hydro boost being some people are saying they're larger, need to do some research; may also look into a new power steering pump from PSC, red neck, etc.
I've always wondered how the IBC work on the newer pickups. I just like how they're built into the dash, but your other thread doesn't make me want a newer pickup just for that by any means.
I've been looking at putting air ride on my cab and rear suspension as well, along with all the other things I want to do.
Yellowchevy