I wasn't saying cut and dry just through motor in there and be done with it! Apparently I was miss informed about your axles and transmissions! Most of the people on the colorado/canyon board, look to your trucks for heaver duty axels transmissions etc.. I figured yours were heavy enough to support I mild V8 swap. I was told the H3 use 8.6" ring gears, same as the colorado 09-10 V8, and some 1/2 ton pickups. Most of the colorado/canyons use the 8" ring gear rear axle, and the G80 locker is known to break even with the I5!

Also being the first person other than mallet to adapt a LSX motor to the Aisin MA5/Ar5 series transmission. I did alot of research on it and the H3 Ma5 has carbon sychros on some of the gears, and hardened gears as well. So it might be up to the task of a mild V8, that doesn't Hot rod, and go hardcore off roading!

I am by no means a auto trans "guy" I have mostly owned and rebuilt manual transmission vehicles. I thought you guys had the 4L65E, and was under the impression this is loosely based of the 4L60E. I was under the impression they shared the same case, and in-order to make it bolt up to a V8 you would just change the input shaft, bell-housing front plate, and torque converter. Maybe install a corvette servo, and a performance rebuild. This would save the aggravation of mating a V8 tranny to your "T" case!

Again somebody miss informed me about the LH8 pan. Here is what I know/heard.. perhaps completely wrong! I thought the LH8 refereed to the 5.3 aluminum block Gen IV motor used in the 2008 Hummer H3 Alpha, and the 2009 Colorado.. the Colorado might have been referred to as the LH9.

I thought LH8 pan has a integral mount for the oil filter and has a major "kick" in for 4 wheel drive colorado V8s. I thought this also cleared the Hummer H3 diff. Apparently not!

No idea what "T" case you guys have, other than the fact hat I heard guys wanting to swap them into colorado/canyons because they are supposedly stronger.

Again was just trying to help, didn't mean to push any of my "wares" or knowledge, on anyone.. even though it sure looks that way!

Hey I have stumbled across this post and have some questions regarding the installation of a 5.3 v8 from an Alpha into my 06 H3. My ex-wife recently blew the motor and trans in her H3 that I bought for her 2 years ago and decided I could have it back (Yes I know so generous of her). So I'm stuck with a complete mess and I would like to consider putting a 5.3 from an Alpha into it. I can order the motor, trans, computer, intake, wiring harness and some other crap I was told I needed from my local dealership. I was wondering if it would be possible to order everything for a H3 Alpha and just swap into my 06 H3? Or would I have to do some serious modifications? Just curious to if this might be possible since I have to go the route of a complete replace of the internals anyways. Let me know what you guys think and possible scenarios of going about this.

Sounds like the perfect candidate for a Mash Motors 6.0 conversion! mmm, torque! :)

Torque that is equal to the cost of buying another Hummer:rolleyes:

As much money, time, and effort it would take to do a Alpha conversion...It would be easier to just fix the 06 and trade-in for another Hummer

Before you order a complete engine and crap from the stealership.... PM thebroken and ask him if he currently has anything. The savings might be HUGE....

If I were going to do an engine swap, it wouldn't be a V8. I'd be more interested in a diesel swap.

So he spends $6k or more, fixes the 06 and sells it for around 16-17k and buys an alpha for 30-34k. The difference in what it costs to fix the motor/tranny and spend buying the Alpha could be put to use on a professionally installed 6.0 Vortech/4L60 and fulltime or selectable transfer case that starts with 325 HP and easilly hotrodded for more. Plus (and this is a biggie! ) NO CODES! With a blown motor and transmission this is the perfect time for a trip to Witchita, especially if he was thinking of making a swap for a stock V8 anyway.

Of course price figures into it and I don't know if he's got bills falling out of his pockets or if the 06 is paid for but if you have to spend the $$ for a new V8, tranny, computer, etc. then you already know it's not going to be cheap going in.

Don't get me wrong, Mash Motors would be an awesome way to go. I have been there and talked to them personally. BUT, who has $18,500 laying around for the conversion? And that's the starting price. For that amount of money, there are plenty of cheaper options. Hell, for that amount you could throw in another I5 and add all kinds of accessories.

Yeah, that's my problem- I could keep my 07 and buy another for that price, but if I ever grenade my driveline I think I'm gonna have to sell a kidney or two for one of these!

Yea I paid cash when I bought her the H3 so I don't have any payments. I make decent cash so I am really thinking about investing in the 6.0. As a lot of good points were made as the pro installation, no codes, and the starting HP there are a lot of good benefits to that. The only draw back is the 18,500 start price, it is a little steep but as far as going the route of a new motor, trans and T-Case plus the cost of a pro install it equals out to around the same price give or take a few grand.

Like Songman said the thought of a diesel swap made me go make love to my wife for a few hours but I haven't really seen a lot on them. I know someone mentioned somewhere about a 6.6 Duramax install but when I read on the article it was way out of my price range with all the custom wiring and fab to make it fit and work. Yes good HP numbers and all the torque you could shake a stick at but a lot headache trying to find someone who knows what their doing and could attempt it again.

$18,500 isn't such a bad price because she is paid for, my interior is still in extremely good shape and the body in really good condition.

Has anyone on here had a 6.0 install and would like to comment on how it runs now after the install? Just curious I would like to hear some good things before I spend that kind of money.