Allison 5 to 6 speed conversion
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- เผยแพร่เมื่อ 26 ส.ค. 2024
- I have an 04.5 Duramax with the Allison 5spd. I was tired of my mileage dropping and temperatures rising if I went 75mph or more.
I couldn't find any good videos of the install or results other than 3 from Duramax Tuner themselves and one random guy in his garage. So I did this video to hopefully answer any questions others might have about the install or visible results from someone else.
So I installed Duramax Tuners 6spd conversion kit. Very easy install, about 2hrs, and so far a lot nicer ride
Thanks for watching and don't forget to subscribe.
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Yeah ok video most grateful for showing us the differences between the 5 and 6 speed valve body.
Kudos for the guts to do this video!
great video, explain everything well!!
I was blown away with your info ! never knew you could do this!!!! first for me!!
I'm going to leave my trans alone thou, if it's not broken don't fix it!! lol
Thanks for the feed back! Ya, I totally get the "leave it alone if it's not broke", but sometimes I just gotta tinker with something. 👍🏻
From what I heard is that the 01-05 they had the 6 speed in them but gm never put the valvebody for it until the lbz and up
That's exactly what I heard also. Transmission is the same, valve body is all that's different. Wish they would have done the 6pd from the start.
I thought hard about this a couple years ago for my 02. By the time I figured up any fuel $ savings vs cost I don’t see a break even point.
I drive all over the country towing a TT, and it just doesn’t show me a savings or gain. After doing the math, I would be better served with a newer truck with a 6 already in it. Or an engine/trans swap to newer, lower mileage when the time comes.
Each to their own though I say.
The math I did showed about a 2 cent per mile savings. That means I'd have to drive my 02 LB7 for about 100k miles in 6th gear just to break even.
I admit my mpg didn't change much, and of course this all depends on day to day conditions. But it is nicer to drive at the lower rims at highway speeds.
@@360plussynthetics nicer to drive on highway isn’t worth 2k+ in my opinion😂
awesome video, thanks
Thank you very much. I hope to do a follow up one of these days.
That’s mind blowing, how do you make a 6 speed transmission but only let it run 5 speeds from the factory?
My thoughts exactly. Why not do it from the start..
They didn’t have the HP from the factory on the first LB7s to tow in double OD. After they upped the HP past a certain number , they then changed the TCM and 6th was available. The early LB7s didn’t have the OD lockout either until 03.
Same idea with the first Harley 6 speeds, they weren’t available in the 88ci but when they went to 96ci they had six speeds.
The 88 would lug too much in an OD, and everyone want OD, so they had to bump the HP to make it usable.
Ya most automatic transmissions use more than 1 set of clutches to make each ratio so it engages 2 different sets to ad another overdrive gear I don't know if they figured it out later or what but it would have been cool if they did from the get go
How much did it cost
Awesome!😍👍
Cool video bro thx
is there a different wiring harness internally?
Nothing that we need to change. Just what comes with the valve body already installed. Everything is plug and play.
I have a ‘03 GMC Duramax
Lucky to find a truck with 49,000 original miles . I’m interested in conversion .
Who supplied your kit ?
See those rpm ‘s drop was something .
Currently at 2000 I’m running at 65
Duramax tuner supplies it just look it up and another thing that doesn’t help your current situation is your gear ratio and tire size. Depending on what those are contributes to either the higher or lower rpm’s at highway speeds.
Great video. Have you towed or added power back yet, will it stay in sixth while slightly loaded. I assume LLY Engine temps rising is the head issue? Not normal in my LB7, only time is climbing mountain at 70mph with 8,000 horse trailer in tow. Climbs to 210 degrees and holds up till the top which is 1500ft rise in a few miles.
I have not towed with it yet. I am back up on my high performance tune though and it feels great. Excellent speed pick up when trying to pass from 65 to 80mph smooth and quick. And yes, temperatures, rpm, and general engine noise were the main reasons for me installing the kit. For me, anything over 70mph and 2100rpm, my temperatures would rise and not come back down. Now I can do 78mph and still be at 1900rpm.
@@360plussynthetics did you replace your turbo mouthpiece?
@@perryp2405 Yes I did. I have a Banks intake and AFE mouthpiece.
So now that you've had this for awhile do you still like it? Still shifting and holding 6th well?
I like it. Still drives good, rpms are down. I haven't done much towing but that was also good. I understand the cost might be a little much to some people but it was worth it to me. 👍🏻
I’ve seen a few of these videos but no one wants to actually film the installation. I’m curious why that wasn’t shown.
Ah, sorry about that. I didn't think about it at the time. It is pretty straight forward though. Unbold the one and put the new one back in its place. The two valve bodies are identical in bolt patterns and such. There's no extra gasket or other check balls . The only difference is the position of that one solenoid. Thanks for watching and the interest.
Douse it still down shift in tow Hall and down shift again if you hold tow Hall for a long time until the overdrive light comes on
Yes it does.
So.i know Duramax tuner has this its very pricey. Why can’t u just install a valve body from a 6 speed and the tcm? Just curious
If you have them available, you might be able to. The valve body is straight forward as far as I know. The only question I'd have is if the TCM has to be programmed to match VIN numbers with the rest of the computers. I dont know enough about programming and how the computers communicate.
I was wondering the same cause there is no way I can pay for that 🤣🤣
I know it's and old but all you need is a new tcm and a new vb. tcm programming is needed. That's it.
why the shakes?
So your telling me all I have to do is change the these two pieces and boom 6speed trans
U happen to have any issues in regards to the cluster im having it read my transmission temp at 305 degrees but i know for a fact its not, is this part of the learning process
I had no issues with the temperature reading any different than originally. Unless something got dislodged during the install and is causing a flow and cooling problem, I don't know what it might be. Hope you get it figured out.
@@360plussynthetics hopefully its part of relearning we had to disconnect the batteries to do some work on the truck and when we went to test it again it drove sooo smooth but then the codes came up and we erased them and thats when everything started acting up again, going to do more key cycles ill see how it goes thanks for replying
@@MehIlvin hope thats all it is.
Just wondering have you had any problems with this conversion kit in your transmission? And what fluid did u use
I have not had any problems. They recommended using dex6 fluid, so I used AMSOIL ATL, which is their equivalent fuel efficient formula to dex6.
@@360plussynthetics can u share a link so I can buy it thanks
The conversion kit? I just went to duramaxtuner website and search for your spacific application. For the AMSOIL go here www.amsoil.com/c/transmission-fluid/19/?zo=1382872
Yes for amsoil
I appreciate your time and interest in the video. www.amsoil.com/guides/?zo=1382872
Here's a link to find spacific products for your vehicle.
How much did it cost????Ty
Are you still happy with the upgrade?
Yes I am. I just got done with a 1200mi trip. The truck is so much nicer to drive on long distance. Sounds quieter, feels smoother, and temperatures don't rise as high even when doing 75 for long distances. I was in south Texas and temperatures were in the 70s. Only thing I'm not impressed with is my mpgs only were in the 18s. I was totally expecting 19-20s. I'm wondering if its because its winter temps/fuel or my tunes from ATP are set up for a 5spd for fueling etc and isnt expecting a 6th gear. I'm going to call #duramaxtuner and see what they think.
@@360plussynthetics Did you get the mpg figured out?
What was the valve body brand or name of kit you used?
I got the kit from duramaxtuner.
@@360plussynthetics thanks
Would I be able to do this to stock allison 5 speed?
Yes. Mine was stock when I did it. All that's needed is the valve body and new programed tcm.
Are those replacement parts Allison? If not, who makes them?
As for as I know, they are stock allison parts that duramaxtuner has gone through and made sure are good to go. Best bet would be to call duramaxtuner and ask them. 👍🏻
Will this kit work with a 5 speed Allison bolted to the 8.1 gas engine?
If it's the ame as the one put in the diesel, then I'm sure it would. You'd have to check with duramaxtuner to get the correct tcm programming. Which will come with the kit.
No
How much fluid did you need to put back in? Does Amsoil have an approved fluid for this?
I honestly don't remember exactly how much I put back in. I believe it was around 11-12qts. But I do have the PPE deep pan also. Yes, AMSOIL does have approved fluid for the Allison. Depending on your model year and what it calls for, we have the regular ATF, which is like dex3. The fuel efficient ATF is dex6. And torqdrive is a reverse engineered Transynd(TES-295). Here's a link to the trans fluids. www.amsoil.com/c/automatic-transmission-fluid/20/?zo=1382872
Also. It doesn't take any more or less fluid due to the valve body being changed. The valve body is the same between the two. It just has an extra solenoid to port the fluid differently. So if you have a stock pan, it'll take the same amount of fluid as before.
does this work with my added tap shifter,it goes on the red tcm connector,just curious
I don't see why it wouldn't. But I don't know. Best would be to call or email Duramaxtuner for the correct answer.
Where did you buy the kit from?? Also what is your new MPGs?
Bought it from duramaxtuner. I haven't done a full tank of only highway driving yet, but with about 50/50 of city/highway, I'm getting about 1.5mpg better. So far I am very pleased with the kit and am anxious to take a longer trip for a good report on new mpgs.
Which allison transmissions can you do this to?
The 5spd Allison used prior to 2006. After that, they started using the 6spd Allison.
How was 5th to 6th gear shift for you initially? Mine seemed a little harsh at first...
It was harsh for the first couple hundred miles. I didn't hotdog it until it started smoothing out. The transmission and computer are new programs and need to relearn the transmission for your driving habits. Mine is smooth but firm now.
@@360plussynthetics Mine smoothed out on stock tune, then I switched to the second to last tune to learn the higher torque. Mine gets into 6th about 60mph. One thing I don't like is when you step on it in 5th or 6th dropping into 4th is harsh. Hopefully that smooths out. I also did the Fleece tap shifter upgrade.👍
@@2015_Rubicnn I ran stock until it smoothed out, then next, etc. Tried to do one tank of fuel on each tune. What I don't like is sometimes it'll up shift and bog down sooner than I think it should. Then a poof of smoke until it catches up. Over all I'm liking it though. Definitely nicer to drive keeping the rpms below 2k.
What is your gear ratio and tire size? Great video.
Thanks for watching and compliment. Gears are stock, 3.73 I believe. Tires are Nitto Terra Graplers 265/75R16. One size over stock.
What was the MPG increase?
I honestly didn't notice any or negligible. If I maintained 65mph everywhere, I probably would, but this has enabled me to do 75 with a lot more ease and comfort in the drivability. RPMs stay just below 2k at that speed.
Thanks, I was thinking of doing it, Since you haven’t seen a big improvement I won’t bother.
So, after a few months now - whats your latest conclusion on mpg savings on long highway trips?
Honestly, I gained maybe 1mpg. I was averaging in the 18s and last trip I got 19.3. I'm actually heading out for a short trip now, same route as before, and will be about check it again. The best thing about the 6spd I've found is the lower rpms, temperatures, and driveability.
Thanks for the info
Price?
Need to check duramaxtuner website. I think they just raised a couple prices. I paid $1600 when I got my kit.
Whoah... was just on their site--$2225 now? In 6 months it’s so much better?? LoL!
😯 Damn! Thats crazy now. Glad I got mine when I did.
Does it work on the Allisons in the school buses
Probably call @duramaxtuner to make sure, but I'm sure if it's the Allison 5spd transmission, it probably would work. But call to make sure.
Seems cheaper to by a wrecked 06, with 6 speed already built
It probably is. My only concern would be swapping the TCM and if it needs to be reprogrammed for the truck VIN to recognize and communicate with it. I don't know enough about that part of it. They also have raised the price the kit about $4-500 since I purchased it, so that doesn't help.
@@360plussynthetics how much is the kit?
@@thomasgriffith3747 you'll have to check the duramaxtuner website. I know its gone up since I did it.
How much did the kit cost?
$1600 plus $350 core charge for the TCM.
I have a 8.1l. Vortec Allison and it feels like it needs another gear. Was the change big enough for the 2k cost?
I have the Duramax, so not sure how the power is in the 8.1. But I do feel itll definitely be worth the extra gear for trips. Gears 1-5 are the same so there's no gain for city driving where you don't get into 6th for extended periods. Cost being worth it is subjective. Before with my 5spd, I couldn't go over 70 without engine temps rising, 3200rpms, mpgs dropping, and more noise. Now the rpms stay around 1800 at 75mph and everything else sounds better.
Thanks so much for the video and info!
My pleasure. I couldn't find any good videos about actual install or before and after info, so I wanted to make one. Hope it helps you and others make an informed decision, either way.
Go Trump
L1.000. NO SERVICE FAST LEARN BRO??????
Lick the video putting it in to my truck to
Thank you. It's an easy install.