VSS Hack
Originally Posted by
TurboDiverArt
That's sort of my feeling. I really don't stomp on it much from a stand still so I don't expect to see much difference. For towing, based on the last rendezvous pull-off, the stock pickup with 3.42 gears pulled the heavy tow trailer in about the same times as a stock truck with lower stock gears so I don't think towing is too much effected.
When you have the 3.42's and the VSS hacked so speed is corrected, is the OD-converter lockup speed raised from 48 to 60 MPH? I guess I just assumed the lockup parameters would stay the same if the VSS were properly set.
Art.
Yes, hacking the VSSB only gives od/lockup @ 60+-.
I have hacked the signal to the vssb from the VSS and the shift points for the 4.10 gearset remained even though gears are now 3.42. However, I get some banging of gears on occasion, I'm thinking this is because I have a shift kit (transgo towing/off road), and the PCM is upgraded with shift mods too. It shifts fast when driven normal, holds gears a little longer when I stomp it.
Looking now at hacking vssb for 3.42 gearset, then modifing the signal from vss for tire changes, this will keep the od/lockup at 55 mph+-.
Keep in mind I have a full tilt 4L80e w/all updates so it may take more of a beating than say a tranny w/shift kit. So, proceed w/caution when hacking just the signal from vss to vssb.
99 GMC SUB, 2500, 4x4, 6.5 TD (F) #H32 enhanced blk, Phaser timing set, B&D IC, 3" ATS exh, K&N w/prefilter, 4WD NVG 246, 4L80E kevlar Transgo off road/tow mods/B&M supercooler, 14 FF MagTec w/locker 3.42:1, 9.25" IFS frt/diff 3.42:1 w/ARB locker, AutoMeter Boost & pre-turbo pyro meter, 12,000 lb hydro winch, Warn classic bumper w/brushguard & diesel scoop, Max E-torq Stage 3, hi pop inj, oil bypass sys, on board air comp for front ARB locker & tire inflation, DynaView driving/auto-cornering lts, DZ nerfs, A/T 285/75/16 SilentArmor 3750 lb rated on 3750 lb rated Alcoa, 3 IP drivers 2 r spares.