6.0 RPM ?

THABULL · June 18, 2012

Just wondering what is the safe maximum RPM on a 2006 6.0? When towing out on the high way with the cruise set at 65mph it will gear down and tach around 4500-5000 RPM , sounds like it is about to explode.

markw8 · June 18, 2012

When I had my 6.0, I found it best to disengage the cruise on grades I thought it would down shift. I seemed to work better all around. Sometimes it's better to slow a bit on the grades but they will rev higher than older engines without problems.

Mark

doverarjim · June 18, 2012

I could not remember but my 99 did not have a "red line" so I figured it should go to the end of the tack at 6 grand and it did a time or two but around 5500 it was pretty tight!!

SWDoodle · June 18, 2012

Just wondering what is the safe maximum RPM on a 2006 6.0? When towing out on the high way with the cruise set at 65mph it will gear down and tach around 4500-5000 RPM , sounds like it is about to explode.

It won't "hurt" the engine if it's just doing it when clilmbing hills, but it it's pretty much stuck in 2nd gear running 4500 rpm all the time, it will definately shorten the lifetime of the powertrain plus use lots of gas. When I towed heavy loads with my old 6.0 I'd leave it third and not use cruise so I could control the throttle more. Now that I have a duramax I just put it in OD and cruise and don't worry about anything. Problem with a gasser and towing heavy is that the max torque is at 4400 rpm whereas the diesel is around 1600. Big difference.

Prokopchuk_9 · June 21, 2012

dont worry about revvin a little, vortecs will bounce off rev limiter at 5500 aaaalllll day. trust me.

alaska511 · June 28, 2012

You'll be fine. I have mine tuned at 6K.

They will run in the range you mentioned all day, fully loaded.

THABULL · June 28, 2012

Cool thanks for all the replies. I bought the truck used a yr. ago and don't have a owners manual and didn't want to hurt the engine.

Prokopchuk_9 · June 28, 2012

I was fishing with mine last week, went down to a lake about 1 hour down a dirt road off the highway that's 45 minutes from where I live. Off of the dirt road you have to take a single track donkey trail for about 25 miles, had 12' boat in the box of my truck loaded with everything (mostly beer lol) got stuck on the way in and out. Both times I was shifting from 2nd to reverse with my foot to the floor in 4 low. Bouncing off the limiter bangin into gear rockin the truck ahahahah....done that on many occasions. She still shifts perfect!!! 140k kms!!! Tough trucks...I can't kill mine. I've been tryin for almost 5 years lol.

THABULL · June 29, 2012

I was fishing with mine last week, went down to a lake about 1 hour down a dirt road off the highway that's 45 minutes from where I live. Off of the dirt road you have to take a single track donkey trail for about 25 miles, had 12' boat in the box of my truck loaded with everything (mostly beer lol) got stuck on the way in and out. Both times I was shifting from 2nd to reverse with my foot to the floor in 4 low. Bouncing off the limiter bangin into gear rockin the truck ahahahah....done that on many occasions. She still shifts perfect!!! 140k kms!!! Tough trucks...I can't kill mine. I've been tryin for almost 5 years lol.

That's good to know because we both pretty much have the same truck 06 1500HD!

00Silverado4x4 · June 29, 2012

Take a look see...

http://archives.medi...a/index LD.html

Your max torque is at 4000rpm, max horsepower is 4400-5200 rpm and max eng speed of 5600 rpm. Let her rip and enjoy the power my friend.

Oh and get a hold of Ryan, he had a thread with a link to original owners manuals in pdf format. I've tried to find it but it's taking longer than expected.

becker87 · June 30, 2012

For work Ive got two 07 one tons with the 6.0. Done a few long trips in the last few weeks through some pretty good hills, trucks would hit 4500 rpms frequently. They are still running fine, I wouldn't worry about it.