_zebra

iTrader: (5)

functionally, yes.
mathematically and potentially structurally, they're different.
(37 ÷ 9) ≠ (41 ÷ 10)

i ain't measured both sets, but if the dimensions of the rings & pinions are the same, then that means the teeth on the 4.11s are thicker (which implies stronger if made of the same material by the same process).

does the difference amount to a hill of beans? likely not.

arthursc2

iTrader: (5)

makes a difference to the bean counters if they can use less material to build the same thing lol

MikeGyver

iTrader: (5)

I have a 2000 2500 regular cab long bed with a 4l80e and a 5.3, but I put the 5.3 in.
Anyway, any time I look up parts for my truck, after I click Sierra 2500 and the other choices, I'm always asked if it has a 6.0 or 5.3. So according to the parts houses, 2500s with 5.3s were made in 2000.

strutaeng

Some of the early 2500 Light Duty (non-HD) did come with the 5.3, but all of the ones I've seen had the 4L80e. I think they were RCLB or ECLB. The 2wd were also front coils, unlike the HDs with torsion bars.

My my knowledge, everything GMT800 with 8 lugs got the 4L80e (based on GVWR, 8600 lbs +.) The only exception was the H2.

One of my neighbors has a CCSB (6.5' bed) non-HD 2500 CatEye. That's definitely a rare truck, I think.

That door tag/RPO code post by @1FastBrick ...um 🧐🤔 never seen that one! Interesante!

1FastBrick

iTrader: (17)

It was 2000 RCLB 2500 that was in the wrecking yard. I thought some one pulled the 6.0L/4L80E so I looked at the RPO code and found it was built that way. I have seen a few truck like this and I didn't know it was an option. This was a US market truck.

I have never seen a 5.3L paired to a 4L80E or a Manual transmission from the factory. And thus far, No one has ever posted Evidence of such combinations.

In Mexico, The 2500's came with the Old fuel injected 5.7 and 6 lug axles. But it's not a standard 10 bolt like we have here its some other strange axle that has no aftermarket support.

_zebra

iTrader: (5)

how many times over the last decade have i mentioned that my uncle never could find the VIN of the '99 he specifically ordered with a 5.3 & stick (and that i've personally seen GM electrical diagrams pulled up by a dealership service manager that were labeled as a manual configuration for 4.8/5.3 1999 models)?

as for the 5.7, GM sold them in the US through 2002 in the C3500 (which was also the only GMT400 with a factory 8.1 big block option). cross-over years used to produce some weird combos... even the Mexican Suburbans eventually got the cat-eye Silverado facelift.

my memory might be a little fuzzy, but i also seem to remember some US 2500LDs with 6lug axles... could be mistaken, though
edit: nope... the 99-00 NBS 2500s look to be 8lug here

1FastBrick

iTrader: (17)

Not in the GMT 800. The GMT400 had a light duty 2500 6 lug 14 bolt.

Mexico has different regulations. There was a drug siezed GMT 800 Suburban from Mexico in the wrecking yard. It was a 2500 with 6 lug axles and 5.7L I started asking around about the configuration and come to find out it had something to do with the regulations there.

As for the 5.3L Manual Trans, You have mentioned it several times but have never posted any proof.
Here is the thing about that. Only the 4.8L and 6.0L had a long crank in 1999-2000 But Not the 5.3L

adriver

iTrader: (1)

I know they didn't make a factory 5spd 1500 with a 5.3, but wasn't there an extended cab 1500 that someone was selling on one of these boards a few years back, (a white one). Am I completely wrong, but I'm questioning whether that one was a 5.3.

_zebra

iTrader: (5)

yep - already fixed the 6lug comment before your reply loaded

and i've asked him a number of times over the years - he never had that VIN wrote down (or cared enough to dig as hard as i would if it was my old truck).
as for the schematics, obviously, the dealer wasn't going to hand those over... but i do specifically remember the manager looking it over with me (i think it might've been the engine harness diagram) and saying, "how about that? i always thought they never did a 5.3 with a stick, but it says so right here." we also pulled up the same for MY2000, which was only labeled 4.8

either way - trust me; i'm well aware of the crank length differences, given i had to piecemeal the clutch & hydraulic setup to put an '01 LM7 into my '99 v6 stick truck. through that, i also learned about the piece that magically debuted as standard equipment for all '01+ 4L80 6.0s (short crank engines): a spacer (12563532) that uses the standard LS crank bolt pattern & conveniently makes up the .4" difference that prevented having to redesign the 4L80 flexplate. "prototyping" that part on a handful of manual 5.3 applications a couple years prior starts to at least sound within the realm of plausibility, don't it?

additionally, the whole nv3500 input rating being "too low" for the 5.3 is hot garbage (besides, the '99 LM7s were also less powerful than the 2000+s with the slight cam update). i say that because i personally had a 30min telephone conversation with one of the Joe Gibbs techs who did the factory-option blower packages and told me they had no qualms warranting the 5speed trucks on the stock transmission, flywheel, & clutch.



wait... so how'd we get this far down a weird rabbit hole again?

_zebra

iTrader: (5)

i've personally seen, ridden in, and found on autotrader a number of 4.3 and 4.8 ECSBs with the nv3500 from 99-00 (the three-door models). that changed to regular cab 1500 (or any HD cab) in 01.