sandpuller2004

00 dodge ram with ctd and 6 speed, and 410 gears, what about putting a gear vendor over drive in their? might be able to lower my cruise rpm at 70 down to 15-1800 rpms and my gas milage up even more then 18mpg? any one heard of doing this on a diesel?

Mopar_Mudder

Read this, my thoughts and more:

http://www.turbodieselregister.com/f...threadid=95558

Bottom line, if you are just lookin for better milage it doesn't pay

RustyJC

We tow a 13,500 lb 5th wheel that puts us on the road at 21,180 GCW (21,500 GCWR). With the 4.10 gears, I've looked into the GearVendors and U.S. Gear overdrives.

One thing to be aware of is that the GearVendors unit is an update of the old Laycock overdrive as used on Austin Healeys, Triumphs, MGs, Volvos, etc. in the 60's thru 80's. It does not have the capability to handle significant reverse torque loads when engaged, and therefore is not recommended for use with an exhaust brake when engaged. Although there are workarounds (some people tie the e-brake solenoid into a relay so that the GearVendors unit disengages when the e-brake engages, or so the e-brake will not engage if the GearVendors unit is engaged), if I had either the NV4500 or NV5600, I'd personally look at the U.S. Gear unit.

JM2CW

Rusty

Haulin_in_Dixie

You will be ruining the truck if you go below 2000 at 70, you just do not want that.

bulabula

I've done the math before, and if you figure an approx cost of about $2000 for the unit, and a 1 or 2 mpg improvement, you'll have to drive your truck around 200,000+ miles before you just break even on your puchase/installation costs.

To me, taller tires (when the old ones wear out) make more sense.

But then again, I'm all for more toys....

Mopar_Mudder

Yep I figure the $2000-3000 for the overdrive would be much better spent on fuel injection for the 440 in my off-roader that gets used once or twice a month ya gotta have priorities on your toys ya know, even if they are screwed up, LOL