jaluhn83
Full Access Member
That's a 2wd unit. The 4wd would have a flange on the rear similar to the rear of a 4wd trans for the t-case to mount.
The 4wd unit goes between the trans and t-case, not aft of it. GV ODs do mount aft of the t-case but not the USG/DNE.
The basic unit will bolt onto a 4wd trans, but there's an adapter that's needed - nothing but a clocking plate really and probably not all that hard to fab. Towcat has the specs but you'd have to talk to him about getting them.
IMHO, these units are better than the GV unit, but it depends a lot on what you're doing. The USG/DNE box works like a 2 speed axle and works well to split gears on a manual trans. On the flip side, there's a bit of learning curve to driving it smoothly and you don't get a high of an overdrive. (0.8). The GV works like an automatic trans - smooth & automatic shift, but not as strong (IMHO) and not as useful to split gears.
The GV is derived from British sport car transmission overdrives - originally that style of unit was used to give a higher 5th gear for high performance cars. The USG/DNE unit was designed to replicate the performance of a medium duty 2 speed rear or range shifter on a heavy duty trans in an add on box. So that gives each it's particular strengths - GV is good for a highway rig where you just want a better od and want it smooth and easy to use. They can handle hauling, but it's not what they're really designed for. USG/DNE is bottom line designed for towing and heavy use - they work well for highway use as well, but bottom line is they're setup for heavy duty towing and such.
The 4wd unit goes between the trans and t-case, not aft of it. GV ODs do mount aft of the t-case but not the USG/DNE.
The basic unit will bolt onto a 4wd trans, but there's an adapter that's needed - nothing but a clocking plate really and probably not all that hard to fab. Towcat has the specs but you'd have to talk to him about getting them.
IMHO, these units are better than the GV unit, but it depends a lot on what you're doing. The USG/DNE box works like a 2 speed axle and works well to split gears on a manual trans. On the flip side, there's a bit of learning curve to driving it smoothly and you don't get a high of an overdrive. (0.8). The GV works like an automatic trans - smooth & automatic shift, but not as strong (IMHO) and not as useful to split gears.
The GV is derived from British sport car transmission overdrives - originally that style of unit was used to give a higher 5th gear for high performance cars. The USG/DNE unit was designed to replicate the performance of a medium duty 2 speed rear or range shifter on a heavy duty trans in an add on box. So that gives each it's particular strengths - GV is good for a highway rig where you just want a better od and want it smooth and easy to use. They can handle hauling, but it's not what they're really designed for. USG/DNE is bottom line designed for towing and heavy use - they work well for highway use as well, but bottom line is they're setup for heavy duty towing and such.
