Duramax Diesels Forum Truck of the Week
  #61  
Old 09-13-2018, 08:42 AM
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Chevy1925 Chevy1925 is offline
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Originally Posted by DMAXchris View Post
I played with slip limit a lot and I still never had it lock on its own below 4th gear, even in T/H.
yeah there were some tables missing for the newer stuff and even the older stuff that made adjusting lock ineffective. IIRC EFi live added a few more but the LLY were still hit or miss due to a miss mapped table i think.

But regardless, the fact it wouldnt lock till 4th means the slip was so great the tcm would not lock it. my old Precision was this way, i saw 2200rpm slip difference in 2nd gear on the tow tune. terrible. never would break the tires loose unless i was locked. different story with this G.
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  #62  
Old 09-13-2018, 01:54 PM
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S Phinney S Phinney is offline
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Tuning has a tremendous impact on how your tranny feels. I havenít experienced these complaints with LMM trucks.


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  #63  
Old 09-13-2018, 06:56 PM
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Quote:
Originally Posted by Chevy1925 View Post
I have 0 issues with getting my G to lock when it should and running the big tune (around 900rwhp). Even turning the slip limit down in the tune to stock it was still locking (found this out when we did the 6 speed swap). The problem here is the G will not work for everyone either. Its all about getting the right combo of parts to work with each other. 37's need gears or you load the engine harder making it easier to blow through the converter. the G is tight/low stall to get the great coupling so large valley turbos wont like it. i have pulled my 5th wheel with the converter unlocked due to an electrical issue and at 26k gross it was pulling along at 55-60 up rolling hills without flying through the converter. that was in 5th gear as well. saw about 6-700rpm slip from what lock up would have been and about 40psi of boost under about 3/4 throttle.
I imagine the old 1057 is close to the G, I still have mine that I bought in 06 thatís in good shape. I guess I could throw it in if Iím not happy with the R just wanted something a little looser than the 1057 that thing was so tight it would spin the tires in the dirt just from going to drive or reverse from a stop without touching the gas, it was real bad in the snow you definitely had to use the brakes. Great towing converter though and thatís what the truck is mostly used for anyways.p
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  #64  
Old 09-14-2018, 07:12 AM
N2BRK N2BRK is offline
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Originally Posted by Chevy1925 View Post
yeah there were some tables missing for the newer stuff and even the older stuff that made adjusting lock ineffective. .
There was a guy in 2013 that figured this out and then I never heard anything more. It was a thread on the efilive forum. I'd feel happier if I could fix the TCM tuning slip limit and ditch my lockup box.
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  #65  
Old 09-22-2018, 09:01 AM
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3794 stg2 with DK converter...... When I floor it, tires shred. No blow through on this converter. Next is the 68stg2r and the R converter.
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  #66  
Old 09-25-2018, 09:36 AM
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Fellas, is there a write up somewhere for doing the tcm TC lock up control ?I can t cure my flare in my 2nd to 3rd shift. I think it's because it's trying to lock and shift starts the same time but can't make up it's mind
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New and improved! 2007 classis lbz LS ec/sb

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  #67  
Old 09-28-2018, 03:31 AM
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Just got done with the 68stg2 R.

This truck has 60 overs as well and stock pump and has the R converter in the trans. Converter works great and as should. Truck does run good! I understand now why others like Evan state that the 1078 might be a fuzz better option vs the R converter because I feel the truck does need a higher flash point to get up on the rpm a little faster for the 68 stg2 R to really get going. It takes almost all of first gear to get going .

Pretty cool too as I did a back to back comparison of the 68stg2 R and the stg2 3794.

Super happy I went with the 3794 as it really is alot more responsive then it's big brother. I asked alot of questions with dozerboy and James! Thanks again fellas.


As far as back to back R vs Dk converter. They are very very close to eachother. I can still mine out to 1900 ish where as the R converter can be stalled to 2200rpm. They both lock up smooth. The R does flash decently higher then the DK. Both couple fluid like a sob. On wet roads, you don't even have to be locked for the tires to lose traction, just give it a little extra thottle and rpms sweep right with speedo. It's frican awesome! Thanks for the suggestions on that too!

If you guys want, I can do a pretty detailed write up on the difference between driveability of the 68stg2R and the 3794 stg2 with Danville vanes if you'd like.
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2003 2500 hd cc/sb (leftovers) MPS 63.5 ihi, built trans, airdog 150, 30 overs..... Sold


New and improved! 2007 classis lbz LS ec/sb

Egr delete, pcv re-route, PIPED, airdog 4g 165,

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  #68  
Old 09-28-2018, 05:38 AM
N2BRK N2BRK is offline
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cool! Great info. FWIW, if at all possible, make the drive to Mark for the in-person tuning. It woke my turbo up like mad. Super pleased!
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  #69  
Old 09-28-2018, 08:33 AM
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When we get a new pump installed on the 60 over truck. Probably will go ahead and do that as it seems he's pretty good at tuning them to keep them alive lol.
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2003 2500 hd cc/sb (leftovers) MPS 63.5 ihi, built trans, airdog 150, 30 overs..... Sold


New and improved! 2007 classis lbz LS ec/sb

Egr delete, pcv re-route, PIPED, airdog 4g 165,

Danville performance tunes.
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  #70  
Old 09-28-2018, 08:41 AM
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Chevy1925 Chevy1925 is offline
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seriously, having him tune that in person will probably loose 90% of that lag you feel.
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Originally Posted by JoshH View Post
Mike L is my role model. I want to be like him when I grow up.
James

02 LL7 2500HD CC/LB dmax/alli "The Limo"

BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
Tailgate Crew Member #4
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  #71  
Old 09-28-2018, 09:18 AM
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Quote:
Originally Posted by Yngdmax92 View Post






As far as back to back R vs Dk converter. They are very very close to eachother. I can still mine out to 1900 ish where as the R converter can be stalled to 2200rpm. They both lock up smooth. The R does flash decently higher then the DK. Both couple fluid like a sob. On wet roads, you don't even have to be locked for the tires to lose traction, just give it a little extra thottle and rpms sweep right with speedo. It's frican awesome! Thanks for the suggestions on that too!
Great coparo of these converters. I agree.
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