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Do stock diesels (Duramax) have turbo whistle?

shady

shady

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I've been trying to contemplate/plan engine possibilities for my crew cab. And I really really want to go diesel. But all the vids I watch on them have that damn whistle. Drives me nuts. All the tuned cars with turbos have flutter and whistle too. Is this just a fact of turbos? Or do stock vehicles not have it?

I hate it enough to steer me to gas if it came to that. After towing with my 5.3/6l80e Silverado I'm not really worried that a gasser wouldn't be fine.

I just have always been a diesel fan.
 
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I love the sound of a diesel semi... That's what got me into them. And I just never heard it in the big trucks.

Then my 87 6.2 burb didn't have a diesel. So I just haven't had much experience with a modern one.

I'd like an lly or lbz in stock form with a manual. Pretty much just because I hear the Allison has issues and it'd kill a 4l80 or 6l80.
 
you can get a 4l80-e in stock form behind a d-max from a van . there rare .

as to allisons have problems ? ? only real problems is electric on some or stupid power in them stock no mods . atleast i have seen .

my old work has lots of them in c5500 trucks with 8.1 gas or d-max . the 1 truck has almost 300k miles and only just recently had a trans controller go bad . otherwise trans is fine .

and if you dont like the whine dont get a deuce and a half with whistler turbo . :rotfl::ears:
 
Allison just seem to come up with the limp mode thing a lot when I search. I'm guessing modded trucks. And I know the 4l80 came behind some, but the Dmax in front of them is detuned down to under 500ftlbs of torque.
 
I'd like a manual my self, but I'd like for the wife to be able to drive it in emergency situations. Which is why I keep thinking auto.

If the Allison is fine behind a stock engine I'd be cool with that lol
 
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From what I've been able to tell by my searches, the lly and lbz are the same thing with a different tune pretty much :dunno:.
 
I know the lbz is what everyone wants though.
 
The whistle gets shut down by the intake not the exhaust. You’re going to need to use the factory intake. They have baffled and resonating chambers specifically designed to hush the whistle.

Which is why they’re the first thing in the trash when I get a diesel.
 
bmxbryant9 said:
My LML is the same
Click to expand...
If I have the windows down and the sunroof open I can hear my lml whistle in the parking garages. Other than that can't hear it. After owning a loud diesel for 10 years, I like my quite truck that cruises down the free way at 85 smooth as can be.
 
shady said:
From what I've been able to tell by my searches, the lly and lbz are the same thing with a different tune pretty much :dunno:.
Click to expand...

I have an 04 Duramax LLY that I bought brand new and have always had over heating issues. For some reason mine got an LLY early, they built them for a year and a half. From the first trip towing our camper it over heated, I put an auxiliary radiator in it and it’s not as bad. If you search LLY over heating issue you will find never ending info on this problem. It only has 108,000 miles on it now, I’ve learned how to drive it to try and avoid having issues.
 
Huh.. I'll have to read more lol.
 
04.5-06 is the problem child LLY. They are good engines overall, but the cooling system is inadequate. In 06.5 the LLY was mechanically identical to the LBZ, but had less power entirely due to the tuning. You can tell the difference between the two as the early LLY has a 5 speed transmission and the late LLY has a 6 speed transmission. You can fix the early LLY cooling system by swapping out the original cooling system with an entire LBZ cooling system (including the pump and thermostat housings, fan, rad, larger hoses etc) and it will no longer overheat. The early LLY also has injector issues, but they are not as prevalent as in the earlier LB7 trucks. I'm running an early LLY in my caddy and while it needs injectors, it serves me well. You could get a ZF-6 behind the late LLY, but not the LBZ. You can take the tune from a late LLY and update the engine tune to make a proper manual trans LBZ as they both use the same PCM.

The Allison is one of the best automatic transmissions available on the market. They are beefy and hold up extremely well when run in a stock application. You'll find the limits of them pretty quick when you are putting out a lot of power though. Limping the transmission is caused by slipping the bands. A limped transmission is a damaged transmission and it will limp under less load in the future after it has happened once. 5 or 6 speed alike, you'll be very happy with one. The ZF6 is a smooth shifting and fun to drive transmission, but you will need to spend a good lump of cash on a solid flywheel and dual disk clutch assembly to hold up to more than a very mild tune. The ZF6 also has a bad habit of breaking input shafts as well. I find that low speed driving suffers with the ZF6 as the engine tends to get into a harmonic with the transmission which cases it to rev up / down rapidly and the whole vehicle to shudder. They also have a lot of gear chatter without a dual mass flywheel and are quite noisy in general. The ZF6 is also a rare transmission and finding replacement parts isn't easy when you do break them. I love em and run one in my caddy, but they are not the end all / be all of transmission options. The Allison is a much smoother transmission to run and they are always in the right gear.
 
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