A lot of the gen 3 Allison internals are quite different it’s not only just a changed valve body. But to be honestly the gen 2 set up is probably the strongest with the gen 3 being the most efficient. Now most of the gen 2 stuff will back service to the gen 1 units they just increased the TQ capacity as the trucks out put more power. In turn they had to make sure the hard parts got stronger as well. But if you do some research you will find a lot of internal parts from gen 3 won’t back service with the gen 1 and 2.
LB7 LML Allison 1000 conversion & swap
- Thread starter Lost0187
- Start date
Truck actually left again last night for another Florida trip it has never left my little brother stranded and has been just an extremely reliable vehicle. The last 2 weeks have been busy trying to build his new farrier rig since STONE WELL didn’t have any available. Here are some pics was built from scratch he left in a hurry last night but I’ll have him send some of the more finished pics. The set up will be paint to match once he come back up to North Ga. All in all turned out great seeming as these rigs cost 30k but it’s nice when you can build them your self to your spec and needs.
Attachments
So with the trans also you don’t have to run a blocker my little brother wanted to you would basically modulate it like the 04-10 do with the G solenoid the only difference and one pointed out the 11 and up is a variable resistance solenoid meaning you can open and close it with PWM vs the 04-10 being a simple on off solenoid basically the same as the SSC-E. In the older trucks the G was added to reduce line at Idle and also on shifts so it wants so noisy (on L18) cause let’s face it with a Duramax you can’t hear pump noise over the engine at idle.
Here is the TCM installed in the truck we moved it to behind the fuse box no changes needed wire harness moved perfectly. As you’ll notice under the hood the extra relay box against the battery this truck has a true Escalade ESV platinum swap from harness to interior. We integrated it to the a 2004 LB7 engine / transmission harness. Everything functions tire pressures etc. the one thing I’m not sure if we will ever get around to is the traction control provisions we are using the 05 esv abs module installed to the K2500 with the independent wheel speeds. There was some playing to get it all correct but truck has been great. Was bought a 2002 but has been updated to a 2003-2006 setup. Also I have the dual fans from the 05 Escalade donor eventually I will install them and wire them up I’ll either use a PWM from derale or a similar controller.
Attachments
Last edited:
Here are some pics of the 2011 LML vs the 2002 gen 1 Allison 1000 the LML is on the bench the LB7 is on the stand in the first few pics then on the pallet after. Notice the case on the LML has some extra webbing with the valve body removed vs the smooth cast from the gen 1. Also there is webbing behind the PTO covers. Not sure if the gen 2 had the extra webbing or the smooth cast can’t remember the last time I went into one. Also originally I was running my 6 speed conversion in the LB7 unit but the trans was very tired and C4 was starting to fail prior so we thought why not just see if we could use the LML unit and we made it work.
Attachments
What wiring did you have to do, swapping the pigtails for A trim/B trim/TCC? Or possibly repin the 06-10 harness?
If I recall correctly the resistance values of the trim solenoids or the TCC solenoid is different than the 01-05 unit.