L-o-n-g story but in a nutshell, the GV kicks out of OD when it wants, it's a fault in it's module that GV's is supposedly fixing. I'm waiting on a replacement module, which GVs are making to fix this fault. Also, it's basically the whole system, I don't even use the gear splitting as IMO it's a complete waste of time. A stock TF-727 is quicker shifting. The shifts for the GV take anywhere from 2-5 seconds depending on rpm speed etc and how "it feels" so very sloppy and inconsistent. I only use OD (6th/4th) when I really have to, highway use and even then I have to use a custom button to hold it in so it won't kick out by itself. It's
the worst mod or part I have ever purchased and given the chance I would buy a Keisler 5-Speed or adapt the A518 to suit the slap-stik linkage which won't be too hard and worth the hassle.
The GVs is an easy install, 2 days comfortably, a little banging to clear 1-1/2" underneath the tunnel and that's it, just the electric side. This is the autoshift sequencer unit the "new" one. The stock one is fine but you have to manually shift into and out of OD which takes practise and even then can not be smooth and perfect, something which GVs themselves fully admit and is the sole reason to making the autoshift unit, to rid this annoying lag. I was expecting NHRA style 6 short ratios and I guess I was hoping for too much because it's far from it. Basically it's a $2,500 extra OD gear....pretty expensive if you ask me. Gear splitting is just a gimmick, nothing more.
Sorry for the hi-jack Dad.