yo Philly,
WELCOME!
Last time I was in South Philly, my 96 barely fit on a side street!
Take time to read through this by Ford;
Four Wheel Drive (4X4) General Information, Operation & Troubleshooting TSB 92-1-8 for Bronco, F Series & Ranger (COMPLETE); Includes Electric Shift On The Fly (ESOF) Troubleshooting & Hub Operation; same for 87-96; exc for that in 87; power from Fuse 6 (15 amp) to "ELECT SHIFT CONTROL MOD" WHT-PPL and CB 12 (30amp) to "ELECT SHIFT CONTROL MOD" BLK-WHT; SEE A7 and A8 in the 4x4 diagram, it shows those two wires BLK-WHT as BK/W from SHIFT MODULE to P1 BATTY and and WHT-PPL as W/P to P2 Source: by Ford via Chilton
Check wiring colors to see if your 88 is same as the 87 or the later years. Then go to town on it.
1356 Electric Shift Wiring Diagram in an 87; Source: by Ford via miesk5 at broncolinks.com
1356 Electric Shift Motor Troubleshooting & Repair (travel stops)
Source: by Richard C (Bigric, Money Pit) at
http://www.supermotors.net/clubs/superford/registry/4584/21843
If motor is shot;
1356 Electric Shift Motor Replacement in a 90 Source: by Casey.can.do at Ford Bronco Zone Forums
1356 Electric Shift Motor Connector, Missing Pins in a 95; "...I just went out and looked at mine. I have, at the Plug...10 wires total. Then, three of those wires go off to a seperate plug on the Tcase. The remaining 7 wires all go up in a bundle until they split and 4 go to the position selector, and three to the motor. So it looks to me like in Steves diagram, look in the lower right corner, you will see 10 numbered wires. #'s 1-3 are likely the ones that go to your motor. Check your wire colors. #'s 6-10 are position sensors, and 2 for the speed sensor, which are probably the ones that go into the tcase, so I would say you need those. wiring does not quite add up right, but the main point I think you need to check is that on your motor you got from JBG, at the connector, are there a total of 10 wires? If yes, then 3 of those will need to be spliced into your tcase 3 wires that you have..."
Source: by Shadofax (TheJuice, The Juice, Mark Z)
1356 Electric Shift Motor Connector, Missing Pins, Bronco & Ford; "...Carefully record wire pin positions. Using a suitable tool, release each sensor wire pin. NOTE: Some harnesses may have a center pin as shown in the sample graphic. If there is a center pin, it must also be transferred. Install wire pins in the replacement motor connector in the same position as in the original motor connector until they snap in place. Note that the sensor and harness wire colors must match. Verify pin placement, then replace red locking tab. This completes wire pin transfer. The white pins are the ones for the speed sensor that need to be transferred..."
Source: by CARDONE® cardone.com
============
Speedo as long as it isn't erratic,
have to replace gear in xfer case ext
Gear Change in a 90 (in Xfer Case Tail Housing) Source: by Keith L (TTB Blows, Bling-Bling) at SuperMotors.net
Gear Color Codes, 80 and up
Source: by JBG via Seabronc (Rosie, Fred W) at SuperMotors.net
If needed, Cable Lubrication; This is for a Stang, but similar Cable & Speedometer Head "... Speedometers get into trouble when cables bind or magnetic heads cease due to the absence of lubrication. Like the humble car clock, speedometers need periodic maintenance, too. The spinning speedometer head needs occasional lubrication (speedometer-head lubricant). Pull the cluster out, disconnect the cable, and feed modest doses of lubricant into the head once a year. Don't overdo it. While you're at it, pull the speedometer cable out and bathe it in white grease and a low-viscosity engine oil. This combination will keep it happy for thousands of miles..." MIESK5 NOTE; Some Speedo ends (at Speedo) are held on by a plastic clip: place Index finger on Metal Tube & thumb on plastic ring flat surface; Press Flat Surface of clip & Pull Cable from Speedo (Ford calls the speedo end the Head; or screwed on:Turn the cable end counterclockwise to disconnect. You may need an open end wrench. This is by Chilton for an 85 Bronco; 1.Remove the instrument cluster as previously described. Remove the lens and the mask from the cluster. 3.Disconnect the speedometer cable. 4.Remove the speedometer attaching screws and remove the unit. To install: 5.Position the speedometer to the pack plate and install the two attaching screws. 6.Examine the square drive hole for sufficient lubrication. If required, apply a 3/16 inch dab of lubricant (B5AZ-19581-A or equivalent) in the drive hole. 7.Reconnect the speedometer cable. Total Cable replacement; 1.Reach up behind the cluster and disconnect the cable by depressing the quick disconnect tab and pulling the cable away. 2.Remove the cable from the casing. If the cable is broken, raise the vehicle on a hoist and disconnect the cable from the transmission. 3.Remove the cable from the casing. 4.To remove the casing from the vehicle, pull it through the floor pan. 5.To replace the cable, slide the new cable into the casing and connect it at the transmission. 6.Route the cable through the floor pan and position the grommet in its groove in the floor. 7.Push the cable onto the speedometer head..."
Source: by Jim SS at
http://www.mustangmonthly.com/howto/mump_1008_1968_ford_mustang_speedometer_cable_replacement/index.html