I have been wanting to buy a gear vendors aux trani for my ford diesel. A local rv/mod shop sells them for 4k installed. The unit is an aux transmission that bolts to transfer case of 4wd's, and they cut the drive shaft to fit to it.

The trani is available for autos and standards. It offers a gear in between each factory gear, and one more on the top, which offers an additional overdrive gear. The trani can be turned on or off at any time, and the factory trani works like factory.

The trani allows you to tow better between gears, and on top end, drops rpm's as much as 400. For me, this would mean 80 mph would drop down closer to the optimum torque curve on the engine which should produce mpg's at the 55-60 mph range.

I think this should pay for itself in fuel savings in 40k miles. Not to mention the additional pulling power while towing the 382

Anyone tried this?

Ive heard very good things about their OD. If it puts your truck in the sweet spot while at cruise i cant see a negative. What trans do you have? Make sure if its an auto that you install a shift kit with better bands and servos. Manual would be fine.

very cool but 4k........ouch

I thought that was the doug nash? I have a friend with the nash in a ford dually he loves it, worth every penny.

I've owned 6 6.0 Fords, two right now plus a shop truck. None of them seem all that load-sensitive. I pulled a short 4500 lb trailer about a thousand miles and only saw about a 2mpg drop. I got a 7 mpg drop from pulling a tall 10K trailer from Florida to Ohio.

It would take you a long time to recoup that 4 grand. You'd have to tow almost daily.

how would this work for those F450 with those 4.88 gears.

Now there's an application for you.

A friend of mine has one on a 2005 Dodge 3500 that is putting out some serious HP, no problems at all as far as I am aware. This is the same vehicle that we used to pull our race trailer, so it has been worked very hard

Me too!! Me too!!!

I can't stand feeling like the truck forgot to shift cruising at 75!!!

http://forums.thedieselstop.com/foru...07#Post1409607


Jeff