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Do stock diesels (Duramax) have turbo whistle?

I had a 05' with a pretty healthy amount of tuning, head studs, custom 4" intake, 4" exhaust, down pipe, boost fooler and more I'm not thinking of right now.

I limped the transmission 2X because I was not paying attention. The reset is a power cycle of the key, the second time I did it I never even stopped, just cycled the key and kept on going. The real trick to them is good transmission fluid, Dex iV with some amsoil slick shift 1QT to each gallon of GM (old ford type F) mixed in made the fluid sticky enough I could tow in Colorado on 80hp tuning without issues. In the Allison 4th gear is the magical gear with over drive locked, in that gear the transmission is really strong and you won't hurt it. I would take a Allison over the ZF6 any day.

The overheating thing is real, I have had a few minor issues with it but it's not been a big deal. Slow speed roads killed mine, 25mph with a heavy load was a killer, 65mph up Vail and Eisenhower passes here in Colorado with a 10,000lb load, no over heating. There are legitimate fixes but it's an airflow issue more than anything.

LLY and Allison is a great combo
 
I was thinking 06 was last year for lbz... I'm reading chit in the wrong places it sounds like lol. I've checked out a couple Duramax/Silverado forums but I pretty much can't stand any forums but this one... Hence why I asked in here :D

I'll have to suffer through some more I guess and do more research.

So lbz+Allison in stock or very near stock form sounds like what I should shoot for.

I wonder how hard it would be to get the stock airbox stuff to all work in a squarebody :thinking:. Shouldn't be too hard

And can the lbz be run fine without all the emissions BS and still maintain a near stock tune?

I've seen some lbz Allison trucks around here for about $6k average. That'd get motor,trans, computer, intake, rear axle, master cylinder, etc. So would be well worth it in the long run I think. A gas setup in what I want gas wise wouldn't be much cheaper.
 
shady said:
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.
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Don't base your decisions off of the internet! People don't start a post with "just wanted to let everybody know I've had no issues with my Allison transmission".........but they will in a heartbeat if they have any issues at all and often they get way exaggerated and blown out of the water. This means that the millions of Allison owners with no issues never start a post, but the few that do have problems will start posts on multiple different forums. Of course they often forget to mention some of the other factors like they are running a 200 HP tune and have 300k miles on the truck! Seriously, I have seen stuff like this in person several times. A cousin of mine bought a used Duramax with 150k miles on the odometer and immediately put the "biggest" programmer he could find on it with no other supporting mods, turned the dial to the highest setting, and then ran the snot out of for a few days before blowing the engine......of course he immediately took it back to the GM dealer he bought it from and started raising hell with them and told everybody how much the Duramax sucks.
 
I seen a few things on them while I was searching diesels. But I've seen a bunch on Craigslist with diesel, and the 8.1 that say the trans keeps going to limp mode. And the 8.1 isn't really a readily modable engine. Maybe a tuner :dunno: but pretty expensive any other way really. So I just assumed they had issues
 
lbz for 6 k? Lbz is the most desired engine and everyone I see for sale seems to want 20k with 200 k on clock.
 
Yeah. There's a few around here.

Probably flogged as h3ll. But they're around here
 
Smokinthehippies said:
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.
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Is this with the Duramax, or all diesels? Cause I have the stock intake, and once I put new exhaust on I could hear my turbo more. But it was silent with the factory exhaust.
 
Smokinthehippies said:
It’s with all diesels. Take your intake off and then talk to me.
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Yep, we like to mess around with the tractors doing that. Greg is just a puppy dog in front of a bowl of food. He just wants to hear the turbo rip. So anything that might- he'll perceive to make the 6.5 turdbo diesel sounds faster, he'll take it.
:haha:
JK Greg.
 
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I think I'm hosed maybe on forced induction with aftermarket goodies lol... Between turbo whistle and supercharger whine I'm screwed..:doah:

High pitches drive me frickin batty. Like a dog or something lol. I'll have to use a factory air box, dynomat, good muffler, and a KICKIN stereo :haha:
 
shady said:
I think I'm hosed maybe on forced induction with aftermarket goodies lol... Between turbo whistle and supercharger whine I'm screwed..:doah:

High pitches drive me frickin batty. Like a dog or something lol. I'll have to use a factory air box, dynomat, good muffler, and a KICKIN stereo :haha:
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Time for a big block with cam. And some bullet muffers. You will be fine.
 
Already have that lol. But flowmaster 50s instead of bullets.
 
The motor in the Bee does. Which will end up in the crew for a while.

Not major but bigger than stock. And 50s because of neighbors.... :cry:. Oh, and the wife :rolleyes2:.
Had drag bullets on it when I got it, hence the name RUMBLE bee lol.

If I go gas instead of diesel in the crew, it's final setup will be 6.2/6l80 with a mild tune and a few basic supporting goodies.

My 5.3/6l80 combo towed 8600lbs as fast as I wanted to go, up some steep (up to 10%) grades, with no issue. And that's pretty close to as heavy as I'll ever tow. That's why I say a stock Dmax would be fine.

The cost of diesel vs the premium a 6.2 needs is a wash really. But I like the smell and sound of the internals of a diesel. And hate the smell of gas. That's why I want to cover all the a questions now so I buy once and mod once lol
 
The lbz went till mid year 07 in the old body style 07.5 and up new body got new motor.
 
Thats interesting, but i would think that require ECM tuning as well . If the ECM and TCM don't talk the truck doesn't move. I know this after a mouse ate through the tcm to ecm wires.
 
GWeakland620 said:
I’m completely aware that intake effects the noise too, but you said exhaust had nothing to do with that and with my truck that was not the case.
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I didn’t say you can’t hear whistle out the exhaust. I said the intake is what makes it quiet.
If you do an intake before exhaust the noise difference is enough to be loud on its own. Then when you do the exhaust you don’t hear t as much because the exhaust is louder than the sucking of the intake, however the whistle is still loud and audible. Like a sweet lullaby.
 
Or like the wicked witch dragging her nails across a chalk board..... How ever you look at it lol
 
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