B&M Shiftplus Electronice shift improver
Will that allow me to tow in overdrive? Sounds pretty easy. What kind of mileage increase have people see from the cold air intake in these trucks?
Yes your can drive the Suburban in OD and actually better for your Torque Converter. The system helps keep the heat down produced by locking up the torque converter clutch faster.
"ShiftPlus simply recalibrates your transmission's hydraulic system electronically. The ShiftPlus shift firmness not only makes driving more fun and pleasurable, but slippage and heat are reduced - extending the life of your transmission! Anyone can install a B&M ShiftPlus in minutes with a few simple hand tools. This design allows you to improve the transmission's shifting performance without removing the transmission pan or valve body. The B&M ShiftPlus electronically enhances shift quality and is adjustable. A simple flip of the switch allows the transmission to operate in the performance mode. Flip it back and you are back to stock!"
Two two wires piggyback into the Pressure Solenoid wire, and the ISS Sensor wire in your transmission. This modifies the signal to your TCM about the line pressure, which the TCM, in turn, boosts to a higher lever. This shortens the time between the changing of gears. The B&M has three positions on the switch (Stock, Stage 1, Stage 2) Stock is stock line pressure, stage 1 is slightly increased pressure, and stage 2 is extremely high pressure.
Stage 2 will completely remove the downtime between gearshift and will probably even cause your tires to chirp between 1-2 and 2-3 upshifts.
For GM rear wheel drive and 4wd trans code MT1 or M30 (RPO code found on sticker in glove box) '93-'98 Suburban, Tahoe, Blazer (C/K, S/T), pickup (C&K) 1500, 2500, 3500, Impala, Camaro, Firebird & '94-'98.
You can install the Shiftpluse on later transmission 1999 and newer, the only thing is, if your have a factory tow button. It does the same thing so you don't have to install one, if you don't you can install one. I have installed on in my wifes 03 Montana to help with the transmission shift pattern, too soft causing the 4T65E in the Montana's to only last just over 150,000 miles. (A GM PCM nightmare, there program to slip until the engine and transmission reaches it's operation temperature.)
On 1999 and new cars and trucks, or even on some 1998. Your going to have to turn the engine off to have the ECM reset so you can turn the Shifterplus back to stock again, you can go up on the stage from stock to stage 2 but you can only go from stage 2 to 1 but will not go back to stock until you trunt your engine off and restart.
Hope this helps answer a few question.
