6.0 Upgrade

DrummerDude70 · Aug 17, 2017

Ok, again, I know I'm late to this subject, but I have a question... I know the engines that everyone uses are the '01-up because of the change to the aft end of the crankshaft from the '99-00. So, here's my question: Is there a way to use the '99-00 blocks and main caps with the newer crank? Can you machine the additional .400" off the aft end of the '99-00 cranks to make them viable? I just see a lot of the '99-00 blocks and/or engines for much less money that the newer versions. Thanks!

DrummerDude70 · Aug 21, 2017

No takers?

iamdub · Aug 21, 2017

I'm not sure what you're wanting to machine off. If it's what I think you're talking about, just get the appropriate OEM flexplate that has the offset built into it.

DrummerDude70 · Aug 21, 2017

From the research I've been doing, the older cranks are .400" longer than the '01-up. That, and I've read that if you do use the "older" engines, that you have to use the old transmission.

iamdub · Aug 21, 2017

The older cranks are .4" longer. The newer ones have a spacer either built into the flexplate or separate but bolted on to make up for the .4" shorter crank. You would put the spacer before or after the flexplate depending on what trans you have. There are different felxplates as well- flat and offset. You could use a newer trans with an older engine and vice-versa, you'll just have to get the appropriate torque converter and flexplate and/or spacer configuration.

Let's try to clean this up- what exactly are you trying to do and with what parts? Do you already have a trans? What motor are you looking for?

DrummerDude70 · Aug 31, 2017

Ok. Well, like I said, from what I had read, I was under the impression that the older engines wouldn't work with the newer trans. I have an '02 Tahoe that I'm wanting to do the 6.0 conversion. I've passed on several older 6.0 engines for the aforementioned reason. Sorry for the delay in responding! Any info provided will be helpful!

bottomline2000 · Sep 2, 2017

DrummerDude70 said:
Ok. Well, like I said, from what I had read, I was under the impression that the older engines wouldn't work with the newer trans. I have an '02 Tahoe that I'm wanting to do the 6.0 conversion. I've passed on several older 6.0 engines for the aforementioned reason. Sorry for the delay in responding! Any info provided will be helpful!

I would say stay with the newer engines. The older 6.0 had iron heads I believe and the newer one are definitely aluminum.. I'm running a 6.0 with 4l80 in my Tahoe and I am using a 4l60 flex plate. I had the aftermarket converter built to match the plate. I also have the stock 4l80 flex plate with spacer if I chose to go that route. The difference is the stock 4l80 plate is flat and the 4l60 is dished. The spacer makes up the difference in the 2. My aftermarket converter is much lighter than the factory 80e converter and it frees up a lot of power. There's a few different ways to skin this cat.

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DrummerDude70 · Sep 6, 2017

Am planning on an aftermarket stall converter. What stall are you running?

bottomline2000 · Sep 6, 2017

DrummerDude70 said:
Am planning on an aftermarket stall converter. What stall are you running?

I'm running a 3k vigilante stall converter. It spools up pretty high because of the 80e 1st gear and my 3.42 gears. I'm going to regear to 4.10 and it should better all around. I ran a circle d 26-2800 stall with my 4l60 and it was a nice combo.

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DrummerDude70 · Sep 8, 2017

Cool! Mine has 3.73, so I was thinking a 26-2800 would be a good match.

6.0 Upgrade

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