Posted by Dwight in S. Ft.Worth on Tuesday, March 11, 2003 at 5:49PM :
In Reply to: Overdrive question (Mac?)... posted by Dana on Tuesday, March 11, 2003 at 1:48PM :
Mac's overdrive(dennan sp?) is a stand alone unit that mounts behind the transfercase. It is a planetary/sun gear type set-up like a lenco transmission. It is not tied to the tranny in any way.
On a side note, it made a world of difference on road speed and engine speed. The only drawback was a loss of ground clearance near the center of the truck(front to rear). Otherwise a very nice product and very clean installation. I would recommend this o.d. to anyone wanting more road speed and not very concerned with extreme offroading.
Dwight