Well beings I have obviously too much time on my hands while I try and find a wiring diagram for a Ford radio. Here are my thoughts for what a truck should be:

Model LT 35
3,500 GVWR
Full Time AWD Only
10F/2R
1st 6.50:1
2nd 5.90:1
3rd 5.40:1
4rth 5.00:1
5th 4.60:1

Low Range 1:1
High Range .50:1

This truck is an attempt to crack into the off road market. It is availiable in a short box, regular cab configuraton only. Engine is a 346 C.I. Straight 6. This model comes with 5.00 gear ratio in the diff. Lockers are standard.
------------------
Model 500
5,000 GVWR
4X2 only
4F/1R

1st 2.20:1
2nd 1:50:1
3rd 1.15:1
OD 0.60:1


This truck is a strip down model with no frills. It is offered as a cheaper alternative for those looking to buy a new truck. Engine is a 298 C.I. Straight 6. This model comes with 3.50:1 Gear ratio in the diff.
----------------
Model 600
6,000 GVWR
4X2 or 4X4
6F/1R
1st 5.25:1
2nd 3.00:1
3rd 2.60:1
4rth 2.20:1
5th 1.80:1
6th 1.30:1
This package comes with 5.00:1 Gear ratio in the diff. ( 3.50:1 optional)


This is just a basic truck. Not realy much to say.
--------------
Model 600 HD
7,000 GVWR
4X2 or 4X4
6F/1R
Low 5.00:1
1st 2.50:1
2nd 2.05:1
3rd 1.60:1
4rth 1.00:1
OD 0.80:1
This package comes with 5.00:1 Gear ratio in the diff. ( 3.50:1 optional)

This truck is designed as a heavier version of the Model 600
------------------------
Model 800
7,500 or 8,000 GVWR
4X2 or 4X4
7F/1R
Low 6.70:1
1st 3.80:1
2nd 3.50:1
3rd 2.90:1
4rth 2.30:1
5th 1.50:1
6th 1:1
This package comes with 5.00:1 Gear ratio in the diff. ( 4.10:1 optional)

This truck is designed as a truck for those who do alot of hauling or pulling.
---------------------
Model 800 Ag Special
7,500 or 8,000 GVWR
4X4 Only
12F/1R
1st 7.50:1
2nd 7.10:1
3rd 6.70:1
4rth 6.30:1
5th 6.00:1
6th 5.60:1
Low Range 1:1
High Range 0.25:1
Reverse locks out in High Range.

This package comes with 5.00:1 gear ratio in the diff. (6.75:1 Optional)
This truck marketed towards farmers, and indutrial customers. On board hydraulics are standard. 540RPM PTO is optional.
-----------
Model 800 Heavy Ag
8,500 GVWR
28F/2R
1st 8.50:1
2nd 8.10:1
3rd 7.80:1
4rth 7.30:1
5th 6.75:1
6th 6.30:1
High 5.70:1

A Range 2.50:1
B Range 2.00:1
C Range 1.50:1
D Range 1:1
Reverse locks out in C and D ranges
This package comes with 6.75:1 Gear ratio in the diff.

This truck is a heavier version of the Ag Special. On board 3 channel hydrualics and 540 PTO is standard. 1000 PTO is optional. Aux. lighting is standard. 325/65R18 tires are standard. Creeper range is also an option.
----
Model 1200
12,000 GVWR
6X4 or 6X6
21F/2R
1st 8.25:1
2nd 7.75:1
3rd 7.15:1
4rth 6.80:1
5th 6.35:1
6th 6.10:1
High 5.40:1

A Range 2:1
B Range 1:1
C Range .50:1
Reverse locks out in C range
This package comes with 6.75:1 gear ratio in the diff. (5.00:1 ratio optional)

Designed as as a heavy duty truck for use by fire departments, US Military, Goverments or other applications requiring a heavy duty truck with a high degree of manuveribility
---------------------------
Model 1500
15,000 GVWR
6X4 only
28F/2R
1st 8.50:1
2nd 8.10:1
3rd 7.80:1
4rth 7.30:1
5th 6.75:1
6th 6.30:1
High 5.70:1

A Range 2.50:1
B Range 2.00:1
C Range 1.50:1
D Range 1:1
Reverse locks out in C and D ranges
This package comes with 6.75:1 Gear ratio in the diff.

Designed as heavy duty truck suitable for heavy duty commercial applications ranging from service, towing and recovery to light mine work.

 

One more thing the Model 800 Heavy Ag is my pet idea. Imagine a 8.50:1 first gear, a 2.50:1 first range and a 6.75:1 gear ratio in the diff. on a truck the that only has a GVWR of 8,500Lbs. That sucker would be just about unstoppable. Hey Ford management are you listening?