Duramax 2001 - 2005 Six Speed Conversion 

This is what I need my lb7. The transmission has been going to limp mode. I'm pushing like 400 plus hp with efl live tuner

Can't wait to get this ..guess I need to be calling James!

Would've been interesting to have this in my 2004.5 LLY. Thought when I got my 2012 Cummins, newer truck, 6 gears, I'd get better mileage. Nope! Worse. Love both trucks though. Cummins has Calibrated Power tunes from these guys with trans tune for about a year now. Works great.

Just wondering if i could put a valve body and TCM from a 6 speed and put it in my 04 5 speed. looking the cost diff from new to used ?

I have an 02 HD Silverado with the 1000 5 speed. At my mechanics request I recently had my TCM replaced, shortly after I began to have trouble with my shift selector light, the square indicator light that shows which gear you have selected. It comes and goes with no regularity upon start up. Sometimes things work better if you start the truck in neutral. Once it does light there is no problem until you restart the truck. I have had a new shift lever installed along with a new key cylinder, new ignition switch, a new internal trans harness. I trust my mechanic but cannot continue with trial and error. I failed to mention that upon installing the new TCM one of the prongs on the harness misaligned, the vehicle was sent to the dealership to be programed and according to my mechanic no flags were raised. The vehicle did not shift properly and they ended up pulling the TCM out and discovered the problem and reinstalled the TCM. I have been told that the wiring harness that fits into the TCM is very sensitive so I am curious if this is a possibilty or could there be no connection to the shift indicator.

H hi, just wanted to say thanks for the video. I wouldn't consider myself a diesel guy I'm more of a big-block gas you know like 8.1 L type of guy but I've had a power stroke I had to elwise back in the day but didn't have them long enough to really start to play with the one thing I didn't notice was it seemed like the power with an edge tuner was not consistent

What has to be done? What is the average cost? These are things we need to know

Question begging to be asked is "Why did GM not opt for the 6th gear?" Does anyone know that information?

How would that do pulling a 12k lbs 5th wheel?

I have the opportunity to pick up a truck with an LLY very cheap, so whether that motor stays in that particular truck or goes into another one your input is greatly appreciated because before adding power I would like let's say bulletproof it, endured make it more efficient and 100% before anything else

i like the 6th gear i get in my ZF6.

Ty

Hey I have a 04 lb7 it’s a 5 speed. It’s got a built trans. Would that affect anything if it is already tuned and I put in a new tcm?

How reliable has this been? Planning for years of trouble free a good plan?

Can I use my stock tcm and just reprogram it?

does this work with the Banks Sixgun tuner?

Would this work for my 01 with the 8.1l big block and 5 speed Allison

This is sweet 💯👍🏻

I am 17,770 sub lol 😂 you guys are great 👍🏻

So I recently dropped my transmission to change the torque converter on my built trans and now the dang thing won't shift into reverse and sometimes will shift into drive but drops out after a few seconds. As far as I can tell seems like the trim solenoid F is Shot, that or the wiring. My trans builder is insisting it's the wiring and said he'd send the parts but I'd pay the labor to have some one else redo my shift solenoids and wiring so I decided to order this conversion instead and a new nsbu switch directly from Allison. I have a fleece tap shifter as well. Hoping I might get a call from you guys on Monday so we can discuss further my setup and needs. Hoping this resolves my range shift issues and as far as trouble codes I get a p0743 and sometimes a p0848. You guys are the gurus and I'm tired of getting treated like an after thought by the people who built my transmission. Hope to hear back from guys, you always are so helpful! Thanks in advance!

Will this work with the Banks Sixgun tuner? Have a 2004 LB7.

The $1300 core charge makes this cost over the top, No one including me buys it because of that. I just actually canceled my order for one after they added this charge on after I thought I bought the kit. You can get the cores for under $600 on eBay all day why they shoot themselves in the foot to add that much is why they sell so few of these kits!

Any reason you couldn’t add a 7th speed by getting it to engage C2 and C5? So you could run a shorter final drive and narrow the (large) RPM gap between 4th and 5th?

One thing he didn't mention is the price. Why don't they ever tell you how much it wil cost? I don't want to waste my time calling. Just tell me the price and I will decide if it is worth buying. Thanks.

not sure where lbz guys get off, have you ever seen a lbz get better mpg than a 5 speed lb7? on highway trips with my 03 its common to see 20-22 if i run at 65

Duramaxtuner love your vids, wondering if this is possible on an 01 with the 8.1/Allison?

I have a 2001 but I want to put the dash from a 2006 in my truck so I can have the manual shift option with the button on the shifter. "Tap shift"

Have a 03 motor home, 8.1 with allison 5 speed. Can this be installed and tuned to allow for better fuel mileage? already have full banks system, when sitting at 65 another gear could be used to mellow it out.

Can this be add on to a a motorhome with a 5.9L cummins. Allison 1000 5 speeds? I get 65 right at 2000 rpm. Will be nice to keep speed and drops rpms.

Can i install this kit on a chevy 2005 c4500 medium duty truck.???

Nick, what external spin on filter do you recommend for the Allison 1000?

Yay I was the 300th guy to like this vid

I need this on my 7.3 powerstroke probably not possible

can I put this conversion kit in the transmission and built the transmission

Never ever did see an approximate cost on in fact any price range

awesome would this work in my 2005 kodiac c4500

So I have read before that a built trans and 6spd conversion don't go together. Is this the case with this set up? I have contemplated 3.42 gears to be able to have a built trans and lower rpms.

Did u find it helps with slip shifting and hanging up in gears? What i was told was typical 5 speed problems? Thanks

Hey guys, I've got a built 5 speed in my LLY. Will this conversion work if i've already got a built 5 speed?

I have an 01 would I be able to buy this and install a tap shifter and use it without going to the the dealer to update it? Is this a drop in unit where I wouldn’t have to go the dealer to calibrate the tcm? I also have a PPE stage 5 trans, when you say upgraded valve body would it already be able to support my trans with the higher pressures? Lastly, I do have your tuning (the spade king) with the trans tuning already on my truck would I have to reflash it?

Duramaxtuner. If a person does this kit and then wants to do a shift kit would they use the 6 speed shift kit or do they still have to pull the trans to do the shift kit?

So whats up for the 8.1 gasser guys

I would like to buy a 6spd conversion for my 98 Ford Escort, which is currently 5 spd. Do you know if there is availability of the conversion I'm looking for?.

will my added tap shifter still function...thanks

i wanna convert my Allison 1000 to 6 speed and run it behind a 12v Cummins in my 70 Suburban. can you guys do a TCM that will work with the Cummins?

Can a Banks Six Gun tuner still be used after the kit is installed?

So this is able to be added into a built trans and have the TCM tuned accordingly to the truck build? Unlike the locked suncoast?

Awesome, how hard the installation process? Looking at the video it looked pretty much straight forward.

My 2004.5 lly has 172,000 miles would it be worth the $2,000+ add on would I benefit I don’t pull much more like an lawn ornament I get 16.6 mph so far had it a few months now no long trips to see if it gets better mpg would it hurt the tranny to drain the fluid never did this yet

Hi I have an 02 sierra duramax can I put an 06 allison transmission??

Is this a simple plug and play or does a computer need flashed?

Maybe a dumb question but since that 6th gear hasn’t been used will it be seized? Or just like new

Will this help make the trans last longer than it would without, or just help with mileage and sound?

Will this work with a tap shifter ?

If I already have EFI Live tuning done and choose to purchase this conversion, would I have to get my EFI Live re-tuned?

Does this conversion get rid of the limp mode issue???

Tried looking on the site for this but couldnt find it

Will this conversion work with trucks that have the 8.1L vortec?

Price?

Good news... shod be done 1980... :)

You guys do more on 1500 ram ecodiesel please

Will my BD Tap Shift still work?

I've heard pump is different in 6 speeds than 5 speeds.

Any Canadian dealers?

Can you maybe give estimate cost? On a 04.5 lly?

I need 2004 LlY

Will ecm tuning need updated as well and does this kit run a higher line pressure?

Might have been a good idea to show a truck that didn't drone worse in 6th:)

How much?

Guy records himself breaking the law lol

Way too EXPENSIVE

How much does this conversion cost???

Does this valve body come with an upgraded shift kit such as transgo jr ?

Would this kit work on the c4500?

Does this work with the 8.1l that has the allison 1000?