Gear vendors overdrive - Ford Powerstroke Diesel Forum

 
LinkBack Thread Tools Display Modes
post #1 of 5 Old 11-17-2012, 10:28 PM Thread Starter
Compression Ignition Addict
 
Join Date: Mar 2011
Posts: 990
Thanks: 0
Thanked 9 Times in 8 Posts
Mentioned: 0 Post(s)
Quoted: 12 Post(s)
Feedback Score: 0 reviews
Gear vendors overdrive

Im looking for opinions on putting a gear vendors overdrive unit in my 2000 f350 dually 4x4 with the zf6. Does it really return the mileage they say it will? How is it for strength? Is it able to stand up to some engine mods? Ive seen 16.5mpg on the highway at 65mph with the truck. It has the stock 4.10 gears in it and stock 235-85R16 tires.

Last edited by ttyR2; 11-17-2012 at 10:37 PM.
ttyR2 is offline  
post #2 of 5 Old 11-20-2012, 06:40 AM
Member
 
Join Date: Mar 2010
Location: Newport,WA
Posts: 49
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I have one on a 2000 f250 ccsb 6sp with 3.73 gears. It works great, with my gearing it works best for towing having more gears. The 6th over work best at 75mph or more when empty. With your 4.10 and 235s it should help with mileage. If you install it your self have you driveline redone by a quality drive line shop. I had some problems with mine until I contacted Driveline specialist of Texas. They are very good, my truck is smoother than stock now.
arcticatdan is offline  
post #3 of 5 Old 12-01-2012, 07:07 PM Thread Starter
Compression Ignition Addict
 
Join Date: Mar 2011
Posts: 990
Thanks: 0
Thanked 9 Times in 8 Posts
Mentioned: 0 Post(s)
Quoted: 12 Post(s)
Feedback Score: 0 reviews
Using the info from Speed versus RPM calculator and Gear Vendors Under/Overdrive Ford 4-Wheel Drive Manual Transmissions., I calculated that with 235/85-R16 tires, the engine would spin 2200RPM in 6th, and 1700RPM in 6 over. 1700rpm is getting a bit low to pull the truck efficiently at 70mph, isn't it? Speed limit in Oregon is 65 (tho most folks do 72 or so).
ttyR2 is offline  
post #4 of 5 Old 12-02-2012, 05:22 PM Thread Starter
Compression Ignition Addict
 
Join Date: Mar 2011
Posts: 990
Thanks: 0
Thanked 9 Times in 8 Posts
Mentioned: 0 Post(s)
Quoted: 12 Post(s)
Feedback Score: 0 reviews
Hrm...ran into a conundrum. It looks like there are issues with the GV unit. Needs relatively frequent maintenance (frequent for drive train components), and doesn't like back-torque (especially from an exhaust brake).

The US Gear units seem to be a LOT better, and run between the transmission and transfer case, so allowing use in 4WD. Alas, they are no longer in production. So...might be one of those deals where I'll have to search for a while and find a good used one out of a wrecked truck or something.
ttyR2 is offline  
post #5 of 5 Old 12-02-2012, 07:10 PM
Member
 
Join Date: Mar 2010
Location: Newport,WA
Posts: 49
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
When you use your exhaust brake DO NOT have your overdrive engaged. I have not seen any US gear units for sale in a long time. I also do not know how hard repair parts would be to get. I change the oil in mine everytime I change engine oil, about every 5000 miles.
arcticatdan is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome