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| 06-07.5 LBZ & LLY Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect |
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05-10-2007, 03:33 PM
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eBay Motors
#1 (permalink)
| | Senior Member
Join Date: Mar 2007 Location: norcal
Posts: 231
| tranny
What is the most hp you can throw at a 6spd alli, if you have done some up grades to it. TqCrvrter, vlv bdy, possible shift kit. Thanks | 
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05-10-2007, 05:14 PM
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eBay Motors
#2 (permalink)
| | Gear Jammer...
Join Date: May 2006 Location: Mt. Pleasant PA
Posts: 1,888
| Tq converter ,transgo JR Kit,will hold low 400's IIRC. Mike L will know for sure!
__________________ 05 Chevy 2500HD dark blue reg cab ZF-6 speed/W South Bend Clutch ,Power by EFI Live W/Dsp2 , PPE GT4094R, ATS CP3x2, Modified Volant intake, MBRP front pipe, 4" side pipe, Holley Blue lift pump, Isspro gauges,Cognito Braces, SD Centerlink, Caltracs, ATS Tie Rod Sleeves Best ET 12.53@ 109 mph 04.5 Chevy 2500HD, silverbirch, D/A, CC/SB , EFI live, SCIV w/ATS 5Star converter,McRat shim mod, Wicked Diesels modded FPR, Kennedy dual lift pump, Modified Volant intake, Cognito Braces,CUD tie rod Sleeves, EGR BLocker,Diamond eye Down pipe, 4" dual exhaust, Elocker, MA Tcase Fix, B&W GN Hitch Best ET 13.53 @ 101mph | |
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05-11-2007, 12:07 AM
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eBay Motors
#3 (permalink)
| | Super Man Moderator
Join Date: Oct 2006 Location: Irwin PA
Posts: 2,634
| Im not sure. I know the rule of thumb for the 5 speed is adding 85hp. I've heard with the extra gear the 6 speed can handle more. 
__________________ Jason 2006 Silverado Shortbed Crew Cab LBZ Escalade handles, Line-x, Painted bumpers and towing mirrors, Tinted Front Windows & Tail lights 2 MTX 10in Subs & Punch 250amp in a custom box. Autometer Ultralite II Pyro & EGT gauges with pillar pod MBRP Turbo Back stainless exhaust (Straight piped), AFE Stage II Intake, PPE Hot+2 265/75/16 Nitto Terra Grapplers on Gear Alloy wheels Lost Kitty Reward if found!! 1999 Ford F-550 Powerstroke Tow Truck-Wrecker **Jerr-Dan Bed, S&B Intake  | |
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05-11-2007, 04:45 AM
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eBay Motors
#4 (permalink)
| | Duramax Forum Moderator
Join Date: Feb 2007 Location: Barnesville OH
Posts: 3,208
| i've been runnin an extra 100hp on my 06 LBZ and the tranny seems to hold up real well..
__________________ James 
05 LLY Chevy LS E/C L/B DRW my older brothers truck now
2006 LBZ GMC SLE C/C S/B,sold the truck to my dad for a business truck
My Truck now,1987 Chevy 2500 350 tweaked,6" SuperLift,350 V8 bored 60 over,Elderbrock headers Cam and Titanium Rockers,750 Twin Pumped Holley Carb and some other goodies.crank dynos over 400HP. | |
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05-11-2007, 06:35 PM
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eBay Motors
#5 (permalink)
| | Senior Member
Join Date: Mar 2007 Location: norcal
Posts: 231
| trans
Thanks for the replies. The extra hp is that factory 360hp plus what ever bolt on to equal the low 400s. Or is an additional 100 or so hp? I ask this because I want to get as much hp and tq I can with out doing a trans swap. I have already done a mbrp 5'' turbo back(soon to be straight pipe). Diablo predator set at 85hp/170tq. I have not dynoed my truck, but assuming current hp is around 460, and tq about 820. Is it possible with 6spd alli to get into 600hp, 1000tq if doing some mods to the trans? | |
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05-11-2007, 06:37 PM
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eBay Motors
#6 (permalink)
| | Senior Member
Join Date: Mar 2007 Location: norcal
Posts: 231
| tyreboyz demaxin, how much was the shift kit, and torque converter? | |
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05-12-2007, 08:35 AM
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eBay Motors
#7 (permalink)
| | Duramax Forum Moderator
Join Date: Feb 2007 Location: Barnesville OH
Posts: 3,208
| i paid to much,but it was alot less then most trannys i have seen..i say this,it is awesome to have a built tranny,shifts smooth and yet is very firm..
__________________ James
05 LLY Chevy LS E/C L/B DRW my older brothers truck now
2006 LBZ GMC SLE C/C S/B,sold the truck to my dad for a business truck
My Truck now,1987 Chevy 2500 350 tweaked,6" SuperLift,350 V8 bored 60 over,Elderbrock headers Cam and Titanium Rockers,750 Twin Pumped Holley Carb and some other goodies.crank dynos over 400HP. | |
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05-12-2007, 09:35 AM
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eBay Motors
#8 (permalink)
| | Member
Join Date: May 2006
Posts: 61
| There is no set rule on how much extra hp you can hold with these mods. I would think low 400s IF the C3s were not damaged previously. Remember the C3 gets beat up even more in the 6 speed than it did with the 5 speed Alli.
__________________
'04 Chevy Duramax CCSB 4X4 | |
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05-12-2007, 07:32 PM
|
eBay Motors
#9 (permalink)
| | Member
Join Date: Apr 2007 Location: Harper, Tx
Posts: 84
|  That's why i replaced mine! In my opinion, it's all about how your using or going to use the truck. If your just going to tool around town, you might be fine. If you plan on pounding the crap out of the truck, upgrade the trans. No matter how much power you think you have or might have later. I plan on keeping my truck for well over 200k, i didn't want to have to open it up later, because i fed it too much power now.
__________________
James-
06 2500 HD SC 4x4 Duramax/Allison
4" turbo back silverline
AFE Magnum intake
Edge Juice w/ attitude
ATS 5 star torque converter, C-3 Clutch pack, Converter lock- up controller
285 bfg all terrains
Ranchhand bumpers front and rear | |
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