Zf-6??
Freshman User
Joined: Jun 2006
Posts: 28
Likes: 0
Originally Posted by F350JOHN
Where is this truck compaired to your location? That sounds like a heck of a drive.
Maybe you should wait and see, because it always works out that when you buy one across the country, one will pop up just down the block from you!
Maybe you should wait and see, because it always works out that when you buy one across the country, one will pop up just down the block from you!
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
There are ratio calculators for the transmission ratios on the gear vendors and us gear sites.
The Gear Vendors has a lockout that prevents the unit from engaging overdrive when the transfer case is in either low or high 4x4 to prevent driveline damage. Yes you could bypass or override it, but it would only take one mistake to cost a lot of money to fix the damage if you forgot to check the front hubs.
The Gear Vendors has a lockout that prevents the unit from engaging overdrive when the transfer case is in either low or high 4x4 to prevent driveline damage. Yes you could bypass or override it, but it would only take one mistake to cost a lot of money to fix the damage if you forgot to check the front hubs.
Freshman User
Joined: Jun 2006
Posts: 28
Likes: 0
My truck does'nt have locking hubs. Right now the number I'm getting to rebuild mine, rather to fix what's wrong, is $2,200. I only drive the truck about once a month, though if it were righteous, I would use it more often. People here talk about a off road tranny builder over in Ar. Does anyone remember who that is? Btw, this problem is happening when I have the truck in 2wd. I don't put it in 4wd 'cause I don't want to mess it up more. I do drive over curbs and median strips between buisnesses to bypass the roads when I feel like it!
Elder User
Joined: Apr 2006
Posts: 894
Likes: 0
From: South Dakota
I have a 1991 F250 XLT 2wd with a ZF5 trans and 4.10 gears. Would it be easier and/or cheaper to buy a ZF6 or to invest in a Gearvendors unit? I see GV units around every once in a while for $3000 down to $1000. On the other hand there are ZF6's online for around the same price or cheaper, problem is they are for years 99 and up. Would they bolt up even with the vast year difference? if they do, then what would have to be done between the tranny and the rear axle to make it work?
Fleet Mechanic
Joined: Sep 2005
Posts: 1,509
Likes: 3
From: Ladner, British Columbia
Unless you get a deal on the ZF6 or GV unit, by the time its installed the cost would probably be about the same.
The GV unit behind your ZF5 would give you a double overdrive, the ZF6 only give you an extra gear with approximately the same OD ration as you already have.
You need to stick with the GV unit that was designed for your transfer case (1356 I believe)
The GV unit behind your ZF5 would give you a double overdrive, the ZF6 only give you an extra gear with approximately the same OD ration as you already have.
You need to stick with the GV unit that was designed for your transfer case (1356 I believe)
More Turbo
Joined: Feb 2006
Posts: 601
Likes: 86
From: Colorado Springs, CO
As stated earlier, the speedometer hookup/location is totally different on the ZF-6. I believe the 1999-200X ZF-6 equipped trucks have the speedometer reading run off the rear end instead of the ZF-5 which has that little plug at the transmission.
More Turbo
Joined: Feb 2006
Posts: 601
Likes: 86
From: Colorado Springs, CO
On a 7.3L diesel the bolt pattern is the same, so it would bolt right up, but between the speedometer hookup being different as mentioned above, and the slave cylinder is totally different, its one of those internal slave/throughout berring combos, which would require all new fluid pipeing and fittings, the crossmember is different too.
So I don't think it would be worth it.
However, it has been done before...........
So I don't think it would be worth it.
However, it has been done before...........
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Laughing Gas
Joined: Mar 2006
Posts: 1,083
Likes: 1
From: Fitzpatrick Alabama
Originally Posted by Hamberger
Unless you get a deal on the ZF6 or GV unit, by the time its installed the cost would probably be about the same.
The GV unit behind your ZF5 would give you a double overdrive, the ZF6 only give you an extra gear with approximately the same OD ration as you already have.
You need to stick with the GV unit that was designed for your transfer case (1356 I believe)
The GV unit behind your ZF5 would give you a double overdrive, the ZF6 only give you an extra gear with approximately the same OD ration as you already have.
You need to stick with the GV unit that was designed for your transfer case (1356 I believe)
Elder User
Joined: Apr 2006
Posts: 894
Likes: 0
From: South Dakota
I am now considering buying a US gear auxilary overdirve considering that it can be used at any time. Just my choice really because having a double overdrive would be great for interstate speeds.
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