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  1. thunder550

    2006 Allison converter housing leak, stumped. Ideas?

    Been chasing a leak from the converter housing area in the 2006 LBZ truck I bought in Sept 2020. Trans has been out 4 times, and still leaking. Leak presents externally by dripping out the small round inspection cover hole on the bottom of the converter housing. When I stick my borescope up...
  2. thunder550

    LBZ low boost? 18psi.

    Reading the ECM with a OBDLink MX bluetooth dongle connected to my phone, running Torque Pro app. App tells me I'm peaking around 17.5-18 psi. From a quick google search, it seems like I should be making around 22psi stock. Truck is 100% stock, down to the intake and exhaust. No black smoke on...
  3. thunder550

    Upper oil pan leak, or other leaks?

    Morning everyone. I'm chasing what I thought was an upper oil pan leak on my LBZ truck, but now that I have everything (except the oil pans) out of the way and can see better, I'm not so sure that's what it is. This started with the lower pan being wet. I pulled that last weekend and resealed...
  4. thunder550

    Dowty (bonded seal) washers vs copper washers - converter housing bolts

    I'm chasing a trans fluid leak coming from the converter housing-to-transmission bolts. I pulled the top of the trans apart already, replaced the two stator/pump plate gaskets, new pump o-ring, new seals on the 10 pump bolts, new copper washers on the bottom two converter housing bolts. Put it...
  5. thunder550

    2006 Allison 6 spd: Trans pump bolt gaskets and copper washers?

    Hey all, long time no talk. Recently bought a 2006 LBZ truck with 253k miles, all stock. Got a trans fluid leak coming from the small round inspection cover at the bottom of the bellhousing, just a few drips overnight. Converter is dry, stuck a borescope up there and it looks like it's either...
  6. thunder550

    Ben, I need your return address....

    Hey Ben, I've had the original lockup box you sent me boxed up and ready to return to you for a couple weeks now. Sent you a couple of PMs to try and get a good shipping address to send it back to you haven't heard back. Can you message me with instructions on what to do with this thing?
  7. thunder550

    LML exhaust drone with Corsa muffler

    I installed a Corsa dB 8004000 muffler on my LML when I did the full 4" exhaust. Still drones pretty good around 1300-1500 RPM. Anyone have a similar experience? I figured the Corsa muffler would still work well for the LML even though it's listed for 01-10 Duramax. Any good solutions for...
  8. thunder550

    LLY ECM and TCM pinouts

    Anyone have diagrams of the ECM and TCM pinouts for a 2005 LLY? I am trying to diagnose a couple of codes...wanting to check continuity from the VSS and the accelerator pedal to the ECM and/or TCM.
  9. thunder550

    Allison 5sp: Hit lockup switch lock button, loud bang, limp mode, codes, strange noises....

    Hit lockup switch lock button, loud bang, P0776, strange noise.... I was testing a new BT lockup switch in my LLY that I got from Ben this afternoon to make sure everything was working correctly. Left a parking lot, got on it probably 50-60% throttle, hit the Lock button when I was going...
  10. thunder550

    LML Coolant levels in tank?

    I drained and refilled the cooling system on my LML last week when doing my EGR delete. I have been having problems since then with it pushing coolant out from around the cap. The passenger side of the tank is about half full, and I had sucked coolant out of the driver side until it was just...
  11. thunder550

    Possible to relocate factory EGT probe?

    I noticed on my LML that there are several EGT probes in the exhaust stream. I am wondering on a deleted truck if it's possible to relocate one of the ones that's being removed (like the one that goes in the up pipe EGR riser) and use that as a pre-turbo EGT gauge that can be monitored through a...
  12. thunder550

    2011 Yukon autoride suspension

    Anyone know anything about the Z55 Autoride package on a 2011 Yukon Denali? We bought my wife's Yukon used and I had no idea they had this. I started checking things out because our Yukon rides really firm. My dad has the exact same vehicle and his is significantly softer than ours is. I crawled...
  13. thunder550

    LML Passenger side up pipe removal

    I'm working on swapping my stock up pipe for a non-emission LB7 up pipe on my 2011 LML. Downpipe is out already. Got all 3 of the up pipe bolts off at the manifold, and 2 of the 3 at the turbo. The 3rd one is behind the coolant pipe that goes from the EGR cooler (I think) to the trans...
  14. thunder550

    Which tune level for stock LML with stock trans?

    Ordered delete parts for my LML. Going to order tuning from Ridge Runner, can't decide which power level to go with. Truck has stock trans that I would like to keep stock for a long time. Looking for recommendations for power levels for two scenarios: 1 - no lift pump, no line pressure...
  15. thunder550

    BT LML line pressure controller

    I just ordered parts to do a full delete on my LML. Trans is stock, and I'd like to keep it that way. Going to have the tuning done by ridgerunner. Looking at the BT line pressure controller. How much does this help? Does it allow higher power levels through the stock trans?
  16. thunder550

    CTS video quality

    Will the CTS screen provide good quality video when hooked up to a decent camera? My factory backup camera is useless for hooking up a trailer, if the sun is behind the truck it washes everything out and if it's in front of the truck the contrast is so poor that the hitch ball disappears in the...
  17. thunder550

    Question on BT Lockup Box installation for 5 speed

    Just got my new lockup controller from Ben, working on installation. I am wondering if I received the correct harness for this box. First, there's a green wire and an orange wire in the gray harness that goes to the TCM controller, both are terminated with female PCM pins. There is no...
  18. thunder550

    LML Bumper gap

    Can anyone measure the gap between their bumper and fender/headlights on their LML truck? I replaced my bumper awhile back and I think my gap is too small, the rubber flap that goes between them keeps squishing out the front.
  19. thunder550

    LML Downpipe/EGR questions

    I'm about done with the upgrades to my 1/2 ton, and thinking about giving my LML some love next. It's 100% stock right now. I'm really familiar with earlier models, but I am LML-dumb. EGR deletes - I think I understand how the EGR system functions on the LML. Looks pretty simple to make some...
  20. thunder550

    Accelerator pedal drops out occasionally, P2133 P2139 P2140

    2005 LLY - I've had an occasional problem that's left me on the side of the road twice where the accelerator pedal stops responding. I have my V2 hooked up, and when this happens the throttle position reads 0% regardless of pedal position. I scanned the ECM and have the following codes...
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