5R110W Input Drum, remanufactured and ready to install. Fits the 5R110W. Ships fast from the USA.
This listing is filed under the 5R110W input drum name, but the part you receive is the rear of the transmission: a refurbished 4x4 extension tail housing adapter for the Ford 5R110W TorqShift, 2003 and later, with the output shaft already installed. It is the piece a four-wheel-drive F-250, F-350, F-450, F-550 or Excursion owner goes looking for after a cracked adapter, a chewed-up output shaft, or a leak between the transmission and the transfer case that a seal alone will not cure. The housing has been cleaned and painted, a new extension seal is installed, and the extension gasket is in the box.
On a four-wheel-drive TorqShift the extension housing is the adapter that ties the transmission case to the transfer case. It supports the rear of the output shaft, and the output shaft carries power from the planetary gearsets straight into the transfer case input. The housing also carries a sensor the computer depends on: Transmission Digest's TorqShift overview places the output shaft speed (OSS) sensor on the extension housing, a Hall-effect sensor that reads a dedicated set of teeth next to the park gear. The PCM uses that signal for vehicle speed and shift decisions, so a damaged sensor bore or a shaft with worn teeth affects more than just a leak.
Clean the area and find where the fluid is really coming from; a transfer case input seal leak and a transmission extension leak look alike from under the truck. Check the fluid type on the drip: TorqShift fluid is red Mercon SP. With the transfer case off, rock the output shaft and look at both spline sets for twisting or step wear. If you also have shift or speed complaints, read the OSS and turbine speed values on a scan tool before blaming the housing. Our 5R110 TorqShift service guide covers the sensor layout and service points, and the 5R110 rebuild wear points guide is worth reading if the rear of the unit shows heat or debris.
This assembly is for 2003-and-later 5R110W TorqShift transmissions in four-wheel-drive trucks. It does not fit a two-wheel-drive truck, which uses a different rear housing for a driveshaft yoke instead of a transfer case. The shaft in this assembly has 25 splines on the input end and 34 splines on the output end; count the splines on your old shaft and compare the bolt pattern and overall shape of your housing with the photos before ordering. If you are not certain, send us your year and VIN and we will help match it. Browse everything we carry for this transmission on the 5R110W TorqShift parts page.
Support the transmission and remove the transfer case first. Unplug and remove the OSS sensor before pulling the old housing, inspect its O-ring, and reinstall it in the new housing with the connector routed as it was. Clean both mating faces completely, use the supplied extension gasket, and torque the housing bolts evenly to the factory specification. Lubricate the new extension seal lip before sliding the transfer case on, and replace the transfer case input seal while it is apart. Top off with Mercon SP and check the level hot using the TorqShift procedure, since fluid is lost when the housing comes off. If the unit is out for a full overhaul, the 5R110W overhaul kit and the ATSG 5R110W rebuild manual belong on the same order, and a fresh TorqShift filter kit is cheap insurance on any repair that opens the unit.
| Fits | 5R110W |
| Part type | Input Drum |
| Condition | Remanufactured |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. Despite the listing name, this is a refurbished 4x4 extension tail housing adapter with the output shaft installed, a new extension seal installed and the extension gasket included. If you need clutch drum parts for a rebuild, look at the drum listings on our 5R110W parts page instead.
No. It is the four-wheel-drive adapter that mates the 5R110W to a transfer case. Two-wheel-drive trucks use a different rear housing that accepts a driveshaft yoke.
The shaft has 25 input splines and 34 output splines. Count the splines on your original shaft and compare your housing with the photos. If anything looks different, send us your year and VIN before ordering.
Yes. The OSS sensor mounts in the extension housing. Remove it from the old housing, check its O-ring, and install it in this one. A damaged sensor or O-ring should be replaced at the same time.
The TorqShift uses Mercon SP. Top it off after the housing is installed and check the level at operating temperature, because some fluid drains out when the rear housing comes off.
