Duramax Diesels Forum Truck of the Week
  #1  
Old 08-23-2019, 05:56 PM
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Bdsankey Bdsankey is offline
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Default Best Clutches Per Pack on 1000hp+ Build

I’ve recently had a trans failure. I’m going to be tearing it apart soon (been busy with my wedding but will be getting the trans out in the next two weeks). Is there any “best” clutch to put into each pack in an allusion? I know the G3 seems to be the longest holding clutch but has been known to have a downshift “clunk” at lighter throttles.

Is it worth waiting until the g4 clutch comes out from alto? My current plan(if g4 is not dropping sometime over the winter) is g3 in every pack and deal with the clunk. I’ve got a guy here who is quite knowledgeable and has built tons of Allison’s in the north-western Wisconsin area and has offered to help me/show me how to build this for future rebuilds and has some pressure mods were going to do (trans currently only has one shim and an Orange spring for pressure on the pump side).
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Current Rides:
1) Toy: 2005 LLY ECSB, Leather, Sunroof
-1340hp/2200ft-lbs @ ATS Diesel (06/04/19)
-Tuned by Zach @ Starlite
-Built Motor, Forced Inductions Billet ETR Gen 4 S480/96/1.10 T6 w/V2 Race Cover, Modded Exergy 250% Injectors, Exergy 14mm Street Pump/LBZ CP3, Goerend Q Converter, Billet Trans, Fuelab Supply Pump/Reg, RCD & Beans Sumps, Front E-Locker, TrueTrac, Yukon 4340 Rear Shafts, Traction Bars, DHD Center Link Brace, DHD Lower Crossmember Support


2) DD/Tow Rig: 2002 LB7 CCSB, Leather, Loaded
-Tuned by Starlite
-Bosch NEW Injectors, FASS 150, 3" Downpipe, 4" Downpipe Back, RCD Sump, PPE Sleeves, DHD Centerlink Brace, DHD Lower Crossmember Support, Steering Wheel Radio Control Swap
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Old 08-23-2019, 06:28 PM
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How hurt was it this go around, you should have 325+psi now with the spring/shim you listed. Is the knock down taken care of already to?
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04 LB7 ECSB Built motor, Wagler billet narrowed Rods, Callies billet narrowed journal crank, Mahle Race Cast pistons, Randy's Girdle, Wagler/Callies Stage 1 alterfire cam, Exergy 100% SAC's, dual CP3's, Randy's race ported heads, Profab cast flow/up pipes, and Billet S480 over a DTS 67.7
2010 LMM CCLB-Tuning/Exhaust
2015 LML Cab and chassis- Tuning/Exhaust
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  #3  
Old 08-23-2019, 06:37 PM
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Quote:
Originally Posted by rcr1978 View Post
How hurt was it this go around, you should have 325+psi now with the spring/shim you listed. Is the knock down taken care of already to?
Park, reverse, neutral, and 1st are all transbrakes (truck starts stalling against the converter in any of them). I believe it cooked the c3 on a 4->3 downshift at full power sled pulling. Evan and Mike have told me I should be running 2 shims. I do understand it’s harder on the pump but it’s a price I’m willing to pay for holding capacity. Yes knock down has been taken care of according to the previous builder. The trans is all Defeo/Xcallibur billet with their 6 pinion p2. I doubt I heart hard parts other than clutch packs as the truck will move forward in a 3rd gear sled pull file only. No matter what I do there is no reverse and it is very difficult to move the truck in neutral with the engine running.



It isn’t apart yet to determine the exact damage. It will be apart in the next few weeks. As of now I’m planning on going over the pressure mods myself/with this trusted builder. I’m planning on ordering all new clutches and gaskets/seals. Bearings/bushings we will assess once I get into it since its only got ~500 miles on it.
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Current Rides:
1) Toy: 2005 LLY ECSB, Leather, Sunroof
-1340hp/2200ft-lbs @ ATS Diesel (06/04/19)
-Tuned by Zach @ Starlite
-Built Motor, Forced Inductions Billet ETR Gen 4 S480/96/1.10 T6 w/V2 Race Cover, Modded Exergy 250% Injectors, Exergy 14mm Street Pump/LBZ CP3, Goerend Q Converter, Billet Trans, Fuelab Supply Pump/Reg, RCD & Beans Sumps, Front E-Locker, TrueTrac, Yukon 4340 Rear Shafts, Traction Bars, DHD Center Link Brace, DHD Lower Crossmember Support


2) DD/Tow Rig: 2002 LB7 CCSB, Leather, Loaded
-Tuned by Starlite
-Bosch NEW Injectors, FASS 150, 3" Downpipe, 4" Downpipe Back, RCD Sump, PPE Sleeves, DHD Centerlink Brace, DHD Lower Crossmember Support, Steering Wheel Radio Control Swap

Last edited by Bdsankey; 08-23-2019 at 06:50 PM.
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Old 08-24-2019, 10:10 AM
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Post up some pics when you get it apart and congrats on your wedding and good luck.
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04 LB7 ECSB Built motor, Wagler billet narrowed Rods, Callies billet narrowed journal crank, Mahle Race Cast pistons, Randy's Girdle, Wagler/Callies Stage 1 alterfire cam, Exergy 100% SAC's, dual CP3's, Randy's race ported heads, Profab cast flow/up pipes, and Billet S480 over a DTS 67.7
2010 LMM CCLB-Tuning/Exhaust
2015 LML Cab and chassis- Tuning/Exhaust
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  #5  
Old 08-24-2019, 03:42 PM
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4-3 downshift while pulling

Sent from my SM-G960U using Tapatalk
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Old 08-24-2019, 07:57 PM
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Quote:
Originally Posted by ikeG View Post
4-3 downshift while pulling

Sent from my SM-G960U using Tapatalk
I had the wrong tcm tune loaded like an idiot. It ran up to 4900-5000 and it grabbed 4th. It then finally loaded up with converter lock and shift (it shifted right after I pushed lockup). It was too much drop at one time and it shifted back to 3rd.
__________________
Current Rides:
1) Toy: 2005 LLY ECSB, Leather, Sunroof
-1340hp/2200ft-lbs @ ATS Diesel (06/04/19)
-Tuned by Zach @ Starlite
-Built Motor, Forced Inductions Billet ETR Gen 4 S480/96/1.10 T6 w/V2 Race Cover, Modded Exergy 250% Injectors, Exergy 14mm Street Pump/LBZ CP3, Goerend Q Converter, Billet Trans, Fuelab Supply Pump/Reg, RCD & Beans Sumps, Front E-Locker, TrueTrac, Yukon 4340 Rear Shafts, Traction Bars, DHD Center Link Brace, DHD Lower Crossmember Support


2) DD/Tow Rig: 2002 LB7 CCSB, Leather, Loaded
-Tuned by Starlite
-Bosch NEW Injectors, FASS 150, 3" Downpipe, 4" Downpipe Back, RCD Sump, PPE Sleeves, DHD Centerlink Brace, DHD Lower Crossmember Support, Steering Wheel Radio Control Swap
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  #7  
Old 08-27-2019, 12:37 PM
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Bump
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Current Rides:
1) Toy: 2005 LLY ECSB, Leather, Sunroof
-1340hp/2200ft-lbs @ ATS Diesel (06/04/19)
-Tuned by Zach @ Starlite
-Built Motor, Forced Inductions Billet ETR Gen 4 S480/96/1.10 T6 w/V2 Race Cover, Modded Exergy 250% Injectors, Exergy 14mm Street Pump/LBZ CP3, Goerend Q Converter, Billet Trans, Fuelab Supply Pump/Reg, RCD & Beans Sumps, Front E-Locker, TrueTrac, Yukon 4340 Rear Shafts, Traction Bars, DHD Center Link Brace, DHD Lower Crossmember Support


2) DD/Tow Rig: 2002 LB7 CCSB, Leather, Loaded
-Tuned by Starlite
-Bosch NEW Injectors, FASS 150, 3" Downpipe, 4" Downpipe Back, RCD Sump, PPE Sleeves, DHD Centerlink Brace, DHD Lower Crossmember Support, Steering Wheel Radio Control Swap
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  #8  
Old 09-16-2019, 03:00 PM
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Well I scanned it and got a P0847 for "Tran Fluid Pres Sensor/Switch B Circ Lo". What is the best course to diagnose this, put a gauge in the test port and see what it does?
__________________
Current Rides:
1) Toy: 2005 LLY ECSB, Leather, Sunroof
-1340hp/2200ft-lbs @ ATS Diesel (06/04/19)
-Tuned by Zach @ Starlite
-Built Motor, Forced Inductions Billet ETR Gen 4 S480/96/1.10 T6 w/V2 Race Cover, Modded Exergy 250% Injectors, Exergy 14mm Street Pump/LBZ CP3, Goerend Q Converter, Billet Trans, Fuelab Supply Pump/Reg, RCD & Beans Sumps, Front E-Locker, TrueTrac, Yukon 4340 Rear Shafts, Traction Bars, DHD Center Link Brace, DHD Lower Crossmember Support


2) DD/Tow Rig: 2002 LB7 CCSB, Leather, Loaded
-Tuned by Starlite
-Bosch NEW Injectors, FASS 150, 3" Downpipe, 4" Downpipe Back, RCD Sump, PPE Sleeves, DHD Centerlink Brace, DHD Lower Crossmember Support, Steering Wheel Radio Control Swap
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  #9  
Old 09-16-2019, 03:07 PM
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The best course of diagnosis is to pull the trans and tear it down. Until you do that, everyone is just guessing at the problem.
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