Complete front driveshaft for 2011-2014 F-150 3.5L EcoBoost and 3.7L V6 4WD with the 6R80, plus 2015-2017 Expedition and Navigator. Replaces BL3Z-4A376-B.
If your V6 F-150 clunks when you shift into 4-high, shakes only when four-wheel drive is engaged, or has a torn boot slinging grease across the skid plate, the front driveshaft is the part to look at. This is a complete, assembled front shaft that replaces Ford BL3Z-4A376-B and the BL34-4A376-AA, -AB and -AC service numbers, listed for 2011-2014 F-150 3.5L EcoBoost and 3.7L V6 4WD trucks with the 6R80 six-speed, and for 2015-2017 Expedition and Lincoln Navigator 3.5L.
The 6R80 sends power out its tail shaft into the transfer case. In 2WD the transfer case drives only the rear shaft. Select 4-high or 4-low and it starts turning its front output, and this shaft carries that torque forward to the front differential. On these trucks it is a short shaft, about 33.9 inches overall as listed, with a flanged joint at each end sealed under a rubber boot. Because a part-time system only loads the front shaft in 4WD, a worn joint can go unnoticed for months and then show up the first snowy morning or the first time you pull a boat up a wet ramp.
Not every clunk on these trucks is driveline. A hard engagement into gear, a harsh 1-2 shift or a sudden downshift is often the transmission controls, and Ford ran several recalls on the 6R80 lead frame in 2011-2017 F-150s. Our F-150 6R80 shift problems guide helps separate the two.
With the truck safely supported, the transfer case in 2WD and the wheels chocked, grab the shaft near each end and try to move it up, down and around. Any clunk or free play in a joint is wear. Turn it slowly through a full rotation and feel for roughness. Look hard at both boots; once water and grit get past a torn boot the joint wears quickly. Then drive the same road in 2WD and 4-high at the same speed. A vibration that only exists in 4WD points forward of the transfer case. If the shake is there in both modes, check the rear shaft, tires and the items in our F-150 6R80 common problems guide first.
Listed fitment is 2011-2014 Ford F-150 with the 3.5L EcoBoost or 3.7L V6, 4WD and the 6R80 automatic, plus 2015-2017 Ford Expedition and Lincoln Navigator 3.5L. Front shafts on these trucks change with engine, cab, bed and model year, and V8 trucks use a different shaft, so read the part number on your old shaft or its tag and match it before ordering. If the tag is gone, measure your old shaft flange to flange, or send us your year and VIN and we will check it. Transmission parts for the same trucks are in the 6R80 collection.
| Replaces | Ford BL3Z-4A376-B, BL34-4A376-AA, BL34-4A376-AB, BL34-4A376-AC |
| Listed fitment | 2011-2014 F-150 3.5L and 3.7L V6 4WD (6R80); 2015-2017 Expedition and Navigator 3.5L |
| Position | Front |
| Overall length | 33.9 in (approx.) |
| Weight | 17 lb |
It is listed for the 3.5L EcoBoost and 3.7L V6 4WD F-150 from 2011-2014. V8 trucks are not in the listed fitment. Match the part number on your old shaft, or send us your VIN to check.
On a part-time system the front shaft only carries torque when 4WD is engaged. A worn front joint or a bent front shaft usually shows up only in 4-high or 4-low, which makes it a good way to separate front driveline problems from the rear shaft and tires.
If the boot just split and the joint still feels smooth, a boot can work. Once water and grit have run the joint dry, it is usually notchy, and a complete shaft is the faster and more reliable fix.
Yes. It arrives as a complete assembly with both flange ends on the shaft, so there is nothing to press or balance before installing.
No programming is needed and the shaft does not affect wheel alignment. If the truck has been lifted or leveled, check the front driveline angle, since a steep angle wears the joints quickly.
