TT differential to a T defferential
 

I am wondering if I can replace my TT differential with a regular T differential? I'm not hauling any load but would like more road speed. Any ideas?

Re: TT differential to a T defferential
 

No. Different mounting, different wheel base, different springs and spring mounts. Couple of choices; spend between 1000 and 2000 for the high speed ring gears or get an add on aftermarket transmission with overdrive.

Re: TT differential to a T defferential
 

Most TT's come from the factory with 7:1 rear. That equals 17 mph.

5:1 gears will give an easy 25 mph, and if you run high rpm will give you 35.

5:1 gears are scarce and relatively expensive. But you need either 5:1 gears or an auxiliary transmission with over drive to run a TT at over 17 mph as recommended by Ford if you have 7:1 gears.

I have a set of used, but serviceable 5:1 gears for a TT. Let me know via pm if you are interested...

Re: TT differential to a T defferential
 

I think a regular T rear axle would be too light. However I have seen two TT trucks with Model A car axles, one with a later V8 axle, and one with a modern Ford (maybe Explorer) axle. You have to do your own fabrication for spring and radius arm location.

Re: TT differential to a T defferential
 

Here is a link to the Warford over-under gearbox:
http://www.mtfca.com/discus/messages...tml?1440509219

There were others including the Tiger gearbox that bolted to the rear axle input and the Ruxtell 2-speed rear axle. While none of them are common in this day and age, there are likely still repairable examples of these units still out there.

Re: TT differential to a T defferential
 

Lane Machine the KC Warford folks, makes a new aux. transmission that will let a TT cruise with the cars.