But, the 904 is a 3-speed. It might work well for a trailered rig, but for someone who also drives on the highway the rpms you're turning at speed are gonna suck. You gotta pick axle gears that are gonna work well either on the trail or the road.

If you do both, I think you really need a t-case doubler or some low t-case gears. Pick your axle gears for the highway and use dual t-case for trail gearing.

Bolting to a D300, it must be a 23 spline output right? Maybe a simple DIY adapter plate can be made to go to Toyota? Or maybe a 203 doubler? A single D300 with 4:1 gears would work well too. Either way, the "adapterless" 904 will only really work well for trail-only use without some other add-ons.

So, 904 with adapters and a doubler or lower t-case gears. 4L60 with it's lower 1st gear and an OD with a single t-case, possibly with an adapter? Cost is starting to look like a wash either way. Compare the gear ratios, your current axle ratio, engine, veristility and your particular needs and take your pick <img src="/forums/images/graemlins/smile.gif" alt="" />

--Dan