What are the torque specs for the Borg-Warner 13-56 transfer case?

Key values listed: 4WD indicator switch 25-35 ft-lb, yoke nuts-to-transfer case 120-150 ft-lb, drain and fill plugs 7-17 ft-lb, transfer case-to-transmission adapter 25-43 ft-lb, heat shield upper bolt 40-45 and lower bolt 11-16 ft-lb, skid plate-to-frame 15-20 ft-lb, and for electronic shift models, shift motor to transfer case 6-8 ft-lb and rear bearing (extension) housing 22-36 ft-lb.

Which transfer cases were used on Ford F-series and Bronco vehicles?

Early vehicles may contain either a New Process 208 or a Borg-Warner 13-45 manual shift transfer case; later year vehicles use the Borg-Warner 13-56 manual shift transfer case, with the 13-56 electronic shift version optional on F150s and Broncos with automatic transmissions.

How do I remove the transfer case?

Raise and support the vehicle on jackstands, drain the fluid if disassembly is needed, disconnect the 4WD indicator switch connector (manual shift) or shift motor harness (electronic shift), remove the speedometer cable (through-1991 models), disconnect the vent hose and shift rod link, remove the skid plate and heat shield, disconnect both driveshafts, support the case with a transmission jack, unbolt it from the transmission adapter, and move it rearward until the input shaft clears the adapter.

Do 1992 and later models use a speedometer cable?

No — the manual notes that 1992 and later models do not use a mechanical speedometer cable.

Is it safe to flat-tow a 4WD without precautions?

The manual warns to consult your owners manual before towing any 4WD, as there are speed and distance restrictions that vary from vehicle to vehicle. The transfer case oil pump is driven from the rear output shaft and maintains pressure anytime the rear driveshaft rotates.

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Ford Bronco/F-Series Transfer Case Removal, Torque Specs & NP208 Exploded View

Open Haynes repair manual spread with specification text and driveline component figures

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Open repair-manual spread showing specification text and exploded driveline component figures.

AI caption July 2017 · Photo 141 of 604

This is a two-page spread (pages 7C-2 and 7C-3) from a Haynes-style repair manual, Chapter 7 Part C, covering the transfer case on Ford F-series trucks and Broncos. Page 7C-2 lists torque specifications (in ft-lb) for the Borg-Warner 13-56 transfer case, including yoke nuts (120-150 ft-lb), drain/fill plugs (7-17 ft-lb), transfer case-to-transmission adapter (25-43 ft-lb), heat shield bolts, skid plate, shift linkage fasteners, and electronic-shift-only items such as the shift motor (6-8 ft-lb). It also provides general information explaining that early vehicles used a New Process 208 or Borg-Warner 13-45 manual shift transfer case, while later vehicles use the Borg-Warner 13-56, with the electronic-shift 13-56 optional on F150s and Broncos with automatic transmissions, plus an explanation of 2WD/4WD/4WD-low power flow. Section 2 gives a step-by-step transfer case removal procedure (jackstands, fluid draining, disconnecting the 4WD indicator switch or shift motor connector, speedometer cable on through-1991 models, vent hose, shift linkage, skid plate, heat shield, driveshafts) and installation notes. Page 7C-3 contains a detailed exploded-view diagram (3.1a) of the New Process NP208 transfer case with dozens of labeled components, and begins Section 3 on transfer case overhaul. Illustration 2.11 shows typical transfer case to transmission mounting details.

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Frequently asked questions

What are the torque specs for the Borg-Warner 13-56 transfer case?: Key values listed: 4WD indicator switch 25-35 ft-lb, yoke nuts-to-transfer case 120-150 ft-lb, drain and fill plugs 7-17 ft-lb, transfer case-to-transmission adapter 25-43 ft-lb, heat shield upper bolt 40-45 and lower bolt 11-16 ft-lb, skid plate-to-frame 15-20 ft-lb, and for electronic shift models, shift motor to transfer case 6-8 ft-lb and rear bearing (extension) housing 22-36 ft-lb.
Which transfer cases were used on Ford F-series and Bronco vehicles?: Early vehicles may contain either a New Process 208 or a Borg-Warner 13-45 manual shift transfer case; later year vehicles use the Borg-Warner 13-56 manual shift transfer case, with the 13-56 electronic shift version optional on F150s and Broncos with automatic transmissions.
How do I remove the transfer case?: Raise and support the vehicle on jackstands, drain the fluid if disassembly is needed, disconnect the 4WD indicator switch connector (manual shift) or shift motor harness (electronic shift), remove the speedometer cable (through-1991 models), disconnect the vent hose and shift rod link, remove the skid plate and heat shield, disconnect both driveshafts, support the case with a transmission jack, unbolt it from the transmission adapter, and move it rearward until the input shaft clears the adapter.
Do 1992 and later models use a speedometer cable?: No — the manual notes that 1992 and later models do not use a mechanical speedometer cable.
Is it safe to flat-tow a 4WD without precautions?: The manual warns to consult your owners manual before towing any 4WD, as there are speed and distance restrictions that vary from vehicle to vehicle. The transfer case oil pump is driven from the rear output shaft and maintains pressure anytime the rear driveshaft rotates.