yo Mac,
I must apologize to you for mis-reading the main issue. I kept thinking of can't shift in park because of some reason.
Look @ MLPS/NSS again.
Section 07-14A: Transmission Range (TR) Sensor
REMOVAL AND INSTALLATION
Transmission Range (TR) Sensor
Transmission Range (TR) Sensor (MLPS) Alignment Tool T92P-70010-AH
Removal
1.Disconnect battery ground cable (14301).
2.Raise and support the vehicle.
3.Remove the shift cable and bracket (7E395)from themanual control lever (7A256).
4.Place the manual control lever in neutral.
5.Disconnect electrical harness from TR sensor.
6.Remove two retaining bolts.
7.Remove transmission range (TR) sensor.
Installation
1.Ensure manual control lever is in the NEUTRAL position.
2.Install TR sensor and loosely install two retaining bolts.
3.Align TR sensor slots using Transmission Range (TR) Sensor (MLPS) Alignment Tool T92P-70010-AH.
4.Tighten retaining bolts to 6-8 Nm (55-75 lb-in) for E4OD and to 7-10 Nm (62-89 lb-in) for 4R70W and remove tool.
5.Connect electrical harness to TR sensor.
6.Install nut retaining manual control lever to TR sensor. Tighten to 27-39 Nm (20-29 lb-ft) for E4OD and to 30-35 Nm (22-26 lb-ft) for 4R70W.
7.Install theshift cable and bracket on themanual control lever.
8.Lower the vehicle.
9.Connect battery ground cable.
10.Check for proper operation with parking brake engaged. The engine should start only in park or neutral.
http://www.thedieselstop.com/faq/9497faq/maint/stj/stj7ea06.htm
Manual Lever Position Sensor (MLPS) Adjustment Info; "...back-probe the MLP line with a volt meter while in Park, and set it to between 4.277 and 4.736 volts (ideally at 4.5065V, right in the middle of the two limits). As a "double-check" afterward, pull the lever down to 1st gear, and again test the MLP voltage; it should be between 0.293 and 1.167 volts, ideally in the middle at 0.73V..."
Source: by SigEpBlue (Steve)
http://www.revbase.com/BBBMOTOR/Wd/DownloadPdf?id=4903