Bought my deceased best friend's Duramax. Need advice. - Chevy and GMC Duramax Diesel Forum
Performance Upgrades Discuss what Intakes,Exhaust,Fuel System,Programmers,Tuners,&Trans. are right for you.

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post #1 of 22 (permalink) Old 09-15-2019, 08:16 PM Thread Starter
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Bought my deceased best friend's Duramax. Need advice.

Hey guys, so about 10 years ago my best friend and me went out test driving new trucks. We went to a dodge dealership and test drove a 1500. loved the throttle response but wanted more. Went to Toyota dealership, Tundra, really liked their new 2007 body style, just not how the truck would be lazy for awhile before it downshifted. Hit the ford dealership and, well. He wasnt a ford guy anyway. We hit the Chevy Dealer, and similar thing to the Toyota, it was 50/50 chevy or toyota at this point, but before we left the sales guy told him he had to drive one more truck. He had never driven a diesel to this point and i think it was the first one i ever rode in too. I remember he punched it (damp day) and lit the tires up. SOLD. a few weeks later he got his truck he ordered from the dealership. He tragically died in a roll over accident awhile ago and when his wife decided it was time to sell his truck so i bought it. It feels to me like his truck lost alot of Jam it had when it was original. I could be wrong but i remember it squeezed me in my seat. I am not mechanically retarded, i know my way around a LS engine (to a degree) but since i got this truck, i started doing research on diesels and performance mods and well... my head hurts. The engine is hard for me to wrap my head around, i don't know any of the plumbing and well, honestly it looks like a nightmare to work on. Soooooo, i need advice. the last diesel i drove was my buddies 2011 LML, he had a DPF delete and a bullydog tuner on it but it sank me into the seat when i squeezed the go petal. I am looking for the same thing in my 08 LMM Truck. I would like to make as much as the new L5P (445hp~900tq) if possible. I watched Gale Banks on "Destroying the Duramax" in his youtube videos and i am unsure on how to achieve my goal. Should i get just a tune? EFi Live? Should i do a intake kit with a tune? Exhaust? I would like to go the route that would be the most reliable and get a EGR/DPF delete as well. I would like it to be Clean (no or very little smoke) and quiet if possible. Please, lay your wisdom down apon me, my budget is 1,000-4,000 canadian rubles
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post #2 of 22 (permalink) Old 09-16-2019, 05:59 AM
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You will need your budget just for a transmission that can take the torque. Or if you spend your whole budget on engine performance upgrades youíll have a dead transmission.
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post #3 of 22 (permalink) Old 09-16-2019, 06:09 AM
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That isnít necessarily true.

Many of us have mild tunes on stock trans with hundreds of thousands of miles recorded.

It depends on what you want to do with it. If you want to hot rod every time you go to the store then a trans upgrade will eventually be waiting for you. But if you want to clean it up and remove unnecessary emissions components and enjoy some pep-that can be had for around 1500-2000. This is also something you sound capable of doing yourself. If you decide to remove the egr yourself-fair warning sheís dug in there pretty tight. Other than that itís pretty straight forward and this community has a ton of write ups to help you along the way.



🤘 Kennedy fuel system support hardware, CCM front Diff Drop, some LEDs to make night into day, got some big ol 20's and wide ass tires and a nice display to show me what's up under the hood-

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post #4 of 22 (permalink) Old 09-16-2019, 07:27 AM Thread Starter
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How much would a trans build cost? and if i did go that route what would be the weak link? i would ideally like to keep the truck as stock as possible but i will pay for upgrades for weak links for maximum durability. however i have a 57 pontiac that i would like to build sitting in storage right now too, so id rather spend money there but i am down for all recommendations and cautions. i typically do not subscribe to the lead foot everywhere but im not gonna lie, i will occasionally hammer down maybe few times a week. i will be towing as well
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post #5 of 22 (permalink) Old 09-16-2019, 10:22 AM
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I donít think on an 08 lmm, that he can feed his stock transmission 445 hp and 900 ftlb of torque for very long till it belches really bad and vomits or gets a good case of diarrhea.
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post #6 of 22 (permalink) Old 09-16-2019, 04:37 PM Thread Starter
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Lets say i wanted a EGR/DPF delete and a mild tune with the capabilities to push it to 500-600hp at a later date. basically future proofing the parts i put on now. what would you guys recommened i look at?
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post #7 of 22 (permalink) Old 09-16-2019, 04:44 PM
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what would you guys recommened i look at?
Doing a Dmax swap into the '57 Star Chief.
There's enough acreage under the hood to fit.

2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
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post #8 of 22 (permalink) Old 09-16-2019, 04:59 PM Thread Starter
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what would you guys recommened i look at?
Doing a Dmax swap into the '57 Star Chief. <img src="http://www.mysmiley.net/imgs/smile//0039.gif" border="0" alt="" title="evil0039" class="inlineimg" />
There's enough acreage under the hood to fit.
Seriously considering. but a 6.0 and 4L80 from a junkyard is infinitely cheaper to make go fast since i can do a majority of the work myself. diesels? witchcraft. however stock Dmax would still be a blast in it.
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post #9 of 22 (permalink) Old 09-16-2019, 05:10 PM
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Inspiration Vid;


2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob
2008 LMM 3500WT DRW Crew Cab, 8 'Flat/GN, Workforce Alum Toolbox, Ride-Rite Air

Use-ta Haves 2006-6.0 3500 WT DRW ExCab Flatbed, 2005-LLY 3500 LS DRW Crew Cab, 2002-LB7 3500 LS DRW Crew Cab
I Live my life in such a way that when my feet hit the floor in the morning...Satan shudders & says "Oh shit, he's awake!"
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post #10 of 22 (permalink) Old 09-16-2019, 06:16 PM Thread Starter
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Originally Posted by Hook'em_Horns! View Post
Inspiration Vid;

Oh jesus, i came here lookin for suggestions and leave looking for motor mounts......
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