Mack E7 and fuller trans fit Mack E6 ?

[johnbor]

I have a Mack E6 motor with a Mack 6 Speed 2 stick transmission. I am going to pull off the Mack transmission an replace it with a Fuller 7 speed transmission that came off a Mack E7 motor.
I know the bolt holes line up but will it fit the input shaft on the transmission and is the bell housing the same length or anything else . The E6 motor had a 14” clutch and the E7 had a 15” clutch ?

[Pigpen 2869]

It should be no problem. A 8LL is a excellent choice to replace the 6 speed. The low will be as good or better we have swapped several.

[johnbor]

(06-16-2025 )Pigpen 2869 Wrote:  It should be no problem. A 8LL is a excellent choice to replace the 6 speed. The low will be as good or better we have swapped several.

Did you have to change a input shaft? mine is not releasing the clutch all the way keepin git in gear . Adjusted clutch and linkage but still will not release. can adjust anymore because its up against he clutch brake.

[Pigpen 2869]

Nopt. Pulled the 6 speed out slammed the roaranger in hackked up a driveshaft. And sent the missle out the door.