Kicking around the idea of a 6.0/6speed conversion

[GMCwantsLS1]

<div class='quotetop'>QUOTE(6gear &#064; Oct 25 2006, 12&#58;39 PM) [snapback]71070[/snapback]</div>

My truck was orginally a 4.8 5 speed and I went to the LS1 with a 6 speed and it was a very easy conversion. You can use the hydraulic line from your current setup and it will plug into the slave cylinder on the 6 speed, you crossmember should fit perfect with no mods you will just need a shorter driveshaft and lower gears in the back.
[/b]

I&#39;m glad you did this. We&#39;ve (Allen and I) been thinking about that exact swap for years and figured it would be a real easy swap. I always figured you could pick up a base model truck with a 4.8 and 5 speed for a good price and make a screaming hotrod truck out of it. Nice job&#33;

[pnhigg]

<div class='quotetop'>QUOTE(SBTork &#064; Oct 23 2006, 11&#58;41 PM) [snapback]70881[/snapback]</div>

I&#39;ve got an 06 rclb and im thinking of doing a 6.0 6 speed conversion once the warranty is up. I think I have a good idea of the depth of the V6 to V8 swap, but I know nothing about putting a 6 speed in one. The truck right now has a 5 speed so all the pedals and lines are there, I&#39;m just not sure if everything will hook up the same. I know it&#39;ll be a hard task to overtake but if I do my homework in the next 2 1/2 years I think I can get a good handle on it. If anyone has done a 6 speed converion or a 6 liter swap, please chime in with any comments or suggestions.
[/b]

Put a T56 in it. They are a blast to drive,
I have a 5.3/T56 combo in a 92 fullsize.
You already have the hydraulics so that part is easy.
As stated above, Keisler makes a kit that will allow you to move the shifter forward and should make it possible to maintain a stock look on the inside.
I have their shifter relocation kit, and only had to trim about a 1/2 out of the original hole in the cab floor.

I agree, you will need lower rear gears. I have 4.56 in mine.

Good luck

[SBTork]

<div class='quotetop'>QUOTE(6gear &#064; Oct 25 2006, 12&#58;39 PM) [snapback]71070[/snapback]</div>

My truck was orginally a 4.8 5 speed and I went to the LS1 with a 6 speed and it was a very easy conversion. You can use the hydraulic line from your current setup and it will plug into the slave cylinder on the 6 speed, you crossmember should fit perfect with no mods you will just need a shorter driveshaft and lower gears in the back.
[/b]

That&#39;s the support I was looking for man, thanks for the info&#33;

<div class='quotetop'>QUOTE(pnhigg &#064; Oct 25 2006, 06&#58;19 PM) [snapback]71138[/snapback]</div>

Put a T56 in it. They are a blast to drive,
I have a 5.3/T56 combo in a 92 fullsize.
You already have the hydraulics so that part is easy.
As stated above, Keisler makes a kit that will allow you to move the shifter forward and should make it possible to maintain a stock look on the inside.
I have their shifter relocation kit, and only had to trim about a 1/2 out of the original hole in the cab floor.

I agree, you will need lower rear gears. I have 4.56 in mine.

Good luck
[/b]

Thanks again man, I figure ill have to do something to strengthen the rear end anyway, so gears will now be a must. How is your mileage with the 4.56&#39;s? I was thinking along the lines of a 3.90, or a 4.10.

[DBYRD]

<div class='quotetop'>QUOTE(SBTork &#064; Oct 25 2006, 11&#58;02 PM) [snapback]71203[/snapback]</div>

That&#39;s the support I was looking for man, thanks for the info&#33;
Thanks again man, I figure ill have to do something to strengthen the rear end anyway, so gears will now be a must. How is your mileage with the 4.56&#39;s? I was thinking along the lines of a 3.90, or a 4.10.
[/b]

im not sure ud lose that much, usually he most ud lose is 1-3 MPG on gear swaps. if u going with this setup, would gas mileage be a concern. i understand that everyone wants the best driveability possible, but for what u lose in gears u can make up for on other things(CAI, synthetics, etc...). i think ud definitely get around 16-20MPG easily. the way u drive will ultimately determine ur gas mileage, but thats a no brainer haha

[SBTork]

<div class='quotetop'>QUOTE(Allstar55566 &#064; Oct 26 2006, 12&#58;18 AM) [snapback]71210[/snapback]</div>

im not sure ud lose that much, usually he most ud lose is 1-3 MPG on gear swaps. if u going with this setup, would gas mileage be a concern. i understand that everyone wants the best driveability possible, but for what u lose in gears u can make up for on other things(CAI, synthetics, etc...). i think ud definitely get around 16-20MPG easily. the way u drive will ultimately determine ur gas mileage, but thats a no brainer haha
[/b]

very true, mileage is not the main concern, but it&#39;s still a concern. I like the fact that a GTO with a 6.0 gets 28 on the highway, power and mileage is the main driving force behind this idea. I did not know that the gears only hurt mileage that much, it may not be that big of a deal all said and done. Thanks man.

[DBYRD]

<div class='quotetop'>QUOTE(SBTork &#064; Oct 26 2006, 12&#58;41 AM) [snapback]71212[/snapback]</div>

very true, mileage is not the main concern, but it&#39;s still a concern. I like the fact that a GTO with a 6.0 gets 28 on the highway, power and mileage is the main driving force behind this idea. I did not know that the gears only hurt mileage that much, it may not be that big of a deal all said and done. Thanks man.
[/b]

yeah no problem, ill try to find some posts to back it up, but ur not gonna be pulling the MPG down too bad. like i said its more the way u drive it after the mods r done thats will affect that. a lot of people get mods done and stomp on it all the time cuz its intrguing, but then they complain about gas mileage. the parts dont causes that huge of a gap, ur not gonna go form 20mpg to like 13 just by doing gears. itd be more of a change in ur driving habit that would cause the change.

EDIT: tired of looking through posts haha theres info on it just have to search and find them. i did find some posts in the t56 just hit the search button up top and type keywords liek "T56" and "gears" and ull be fine.

[pnhigg]

Honestly I am not exactly sure what kind of milage I am getting right now.
My speedo is still not calibrated correctly, and haven&#39;t had time to change it.
Also my truck is not a daily driver, just a toy, so I didn&#39;t assemble it with efficiency in mind.
It has a mild cam, and a tune from Allen.
I had in mind going with 4.10 but found an Eaton posi unit with 4.56 gears on Ebay, and bought them to try.
I&#39;m glad I did.
For a daily driver, 4.10 would be fine, buy I would not go lower, just my opinion.

FYI I can run about 70mph in 6th at about 2000rpm with plenty of power left.

My original gears were 3.08 and when I switched to the 4.56 the seat of the pants difference was about as significant as changing from the original 4.3 to the 5.3.

Good luck

[6gear]

I am going to say don&#39;t even consider anything less than 4.56. I started out with factory 3.42 and then tried 4.11 but now have 4.56. With a 29" tire I can run about 80 at 2000 rpm&#39;s in 6th. I drove on a 750 mile trip one way and got 19.888 mpg running between 80 and 90 mph.

[SBTork]

excellent info guys, thanks

[Weird_guy]

<div class='quotetop'>QUOTE(pnhigg &#064; Oct 25 2006, 07&#58;19 PM) [snapback]71138[/snapback]</div>

I have a 5.3/T56 combo in a 92 fullsize.
[/b]

Is your truck a rcsb or an ecsb?

ps. Any pics of the interior?