gear vendors

[DieselChemist]

Other than a gear vendors, nv4500, ranger, and zf5 overdrive or changing rear ends. Is there any way of adapting somekind of a divorced unit behind the transfer case to these trucks to lower my rpms. I am really looking for somekind of a divorced unit to use as a two speed high/low.
Bill

 

[apextrans]

If I'm not mistaken, gear vendors has or had a divorced mount setup. I think Mel has one of his trucks set up that way.

 

[Camarogenius]

Actually, you'd want it between the tranny and the transfer case, that way both driveshafts turn at the same rate. If you put it after the transfer case, then the front driveshaft will turn faster than the rear.

 

[hugeredford]

i've realy been thinking of putting an np205 divorced t case in backwards turning the low range into a super high range over 1.75 to 1 i think. its the most possible homemade unit i can see but it will be very dogish

 

[DieselChemist]

If I only use the high gear in 2wd I can put it behind the transfer case

 

[Camarogenius]

For the money and knuckle busting fun you're describing, you could find a ZF-5, bolt it in, and call it done.
I've got a ZF-5 and 3.55 gears, it pulls whatever I need to pull, and rolls down the highway at 24 mpg. (Well, it did before this ULSD crap showed up everywhere).

 

[DieselChemist]

I would bolt in a zf 5 but a rebuilt one is $1200, plus I would need to change the flywheel and clutch because I have a 6.9. It would turn out to be about $2000 for me to the job. All you need to install a divorced unit is the transfer case or other unit, cut the drive shafts to length (essentially make 2, one in one out), run a shifter and fabricate a crossmember. I also like my t19 with 4:10 ratio in 1-3 but would like a overdrive for the expressway.



Has anybody seen a np205 put on backwards and will it work?

 

[Full Monte]

I have a GV unit on one truck and a USGear on the other. The GV unit can be used on a 4WD vehicle, but not while in 4WD. It is locked out in a way that doesn't allow it to work in 4WD, preventing you from destroying the running gear. The USGear unit can be engaged in 4WD because it sits between the tranny and transfer case. It's pretty common knowledge that the GV is very smooth shifting, but the USGear is bullet-proof and rated to tow 30,000 lbs. I like the idea of zf5, but have no experience with one.

 

[Agnem]

The difference between a ZF 5 and a Gearvendors unit is about 4 gears. If a GV or US Gear is an option, it's a definite upgrade over whatever trans you could throw in it. As I see it, the GV unit is easier to install, and depending on what wheelbase you have, potentially much easier. I've never needed OD in 4 wheel drive, so I don't think the US Gear has a significant advantage over the GV. As for being more bullet proof, I'm not sure about that. I think they are both very good. Don't forget to add the cost of modifying 2 driveshafts when thinking US Gear.

 

[tractorman86]

hugeredford, if my memory serves me right the 205s are a 2.75 to 1 ratio. so turning it backwards would make for an insanly high gear ratio . gitRdone!!!

 

[Camarogenius]

205's are 1.96 to 1.

 

[DieselChemist]

What kind of fuel mileage increase do you guys see with a gear vendors?

 

[tractorman86]

205's are 1.96 to 1.

oh ok, maybe i was thinking the np231 then. thanks

 

[zigg]

What kind of fuel mileage increase do you guys see with a gear vendors?

I've got a "Ranger" overdrive on my T-19 with 3.55 rear, and it cruises on the hwy a55mph at 1500rpm, and 65mph at around 1700rpm.

If I do the 55 mph(pretty hard) I can steadily get over 23mpg(Can. gallon) and if I do the 65 mph with cruise on I average about 21 depending on hills.

On the flat I can tow my 6500lb. TT in OD, but any kind of hills and it lugs down pretty easy. I don't like to tow too fast either, so rarely go over 60mph, and the truck is just much more happy in 4th at 55 with the load on, and my fuel economy drops to about 17/18 when towing.

The Ranger isn't really all that easy to put in, but allows manual splitting of all gears in hi 4wd and low range(not that you really every do) I got mine off ebay for $700, and had to modify one driveshaft. It is definately one of the best mods I have done to my truck, bar none.

It's not really about the fuel though, it just makes the hwy so much nicer and the truck is so much more driveable. I have no idea how you guys with the 4.10's or higher drive on the hwy for any length of time...

Zigg

 

[The Warden]

It's not really about the fuel though, it just makes the hwy so much nicer and the truck is so much more driveable. I have no idea how you guys with the 4.10's or higher drive on the hwy for any length of time...

Ear plugs!!

Seriously, IMHO a ZF5 and an OD unit together would be the best of both worlds...double-overdrive and if you have 4.10's to begin with, you won't lose any low-end grunt either. I've had the ZF5 in my truck for a little over a year, and it was like night and day compared to the T-19...I would recommend it for anyone. Even still, I want an OD unit...I do enough empty freeway cruising that I want to get my RPM's down, but tow enough that I don't want to sacrifice anything. So, 10 forward gears sounds great to me