Are there any overdrive units available for 7.3 zf6 combo? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 23 (permalink) Old 05-28-2010, 03:13 AM Thread Starter
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Are there any overdrive units available for 7.3 zf6 combo?

When I looked into this several years ago, there were two manufacturers and I can't remember much abou them. Are these things still around and how much do they cost and what kind of mpg can I expect to gain. I currently get a consistent 18.5 stock and 19-19.5 with my chip. Thanks.

2002 f-350 PSD, 4x4, cc short bed, 6spd, ccv mod, airdog, AIS filter, isspro ev and scangauges, detroit TT, ITP boost annihalator, ITP RR, bellowed up-pipes, ats housing, turbomaster, 3.5 dp magnaflow, very happy with ultra smooth and linear PHP 50t, 80DD and "whisper" tunes.
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post #2 of 23 (permalink) Old 05-28-2010, 03:00 PM
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Re: Are there any overdrive units available for 7.3 zf6 combo?

Idk, but maybe Gear Vendors have something.

One of them truckless bastards.
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post #3 of 23 (permalink) Old 05-28-2010, 04:45 PM
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Re: Are there any overdrive units available for 7.3 zf6 combo?

Yes, gear vendors should have one. I think it would be the kind that hangs off the end of the tcase though, not sure.

Dan
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post #4 of 23 (permalink) Old 05-28-2010, 11:14 PM
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Re: Are there any overdrive units available for 7.3 zf6 combo?

Gear Vendors makes a OD for both 4x4 and 4x2.

I'm putting one in now. I should have results by midsummer.

2000 F-350 SC 4x2 6 speed
3.08 gears Gear Vendor Overdrive
Slammed 4"
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post #5 of 23 (permalink) Old 05-29-2010, 06:44 AM
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Re: Are there any overdrive units available for 7.3 zf6 combo?


can't wait to hear how it does

Dan
96 Powerstroke: 6637, downpipe to dump exhaust, 140v IDM and a shift kit.

84 Honda Sabre V65 1100: pipes, jet kit and new tires. Faster than I think I'll ever need.
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post #6 of 23 (permalink) Old 05-29-2010, 01:19 PM
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Re: Are there any overdrive units available for 7.3 zf6 combo?

So, with a double overdrive and a 3.73 gear is see about 1575rpm at 70.
With the 3.08 and double overdrive, I see about 1200 rpm at 70.
Right or wrong!!!!!!!!!!

JonFord

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post #7 of 23 (permalink) Old 05-29-2010, 01:50 PM Thread Starter
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Re: Are there any overdrive units available for 7.3 zf6 combo?

What would be involved to hook this up to a 4x4?

2002 f-350 PSD, 4x4, cc short bed, 6spd, ccv mod, airdog, AIS filter, isspro ev and scangauges, detroit TT, ITP boost annihalator, ITP RR, bellowed up-pipes, ats housing, turbomaster, 3.5 dp magnaflow, very happy with ultra smooth and linear PHP 50t, 80DD and "whisper" tunes.
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post #8 of 23 (permalink) Old 05-29-2010, 07:52 PM
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Re: Are there any overdrive units available for 7.3 zf6 combo?

I'm looking for 1225 RPM @ 70 MPH.

The 4x4 version is more common and less expensive. The 4x4 version has a switch that disengages the overdrive when you engage the 4x4.

Should be operational next week.

2000 F-350 SC 4x2 6 speed
3.08 gears Gear Vendor Overdrive
Slammed 4"
Rugged Air Dam
315,000 miles
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post #9 of 23 (permalink) Old 05-30-2010, 12:53 AM
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Re: Are there any overdrive units available for 7.3 zf6 combo?

Quote:
Originally Posted by clydesdale View Post
What would be involved to hook this up to a 4x4?
Bolt it in and wire it up. Pretty simple had a hand in one. Guy took a six speed with a brown lite out.

97 crew cab shorty-4x4 Lots of mods .
Tuned by T Wildman
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post #10 of 23 (permalink) Old 05-30-2010, 04:38 AM Thread Starter
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Re: Are there any overdrive units available for 7.3 zf6 combo?

What do you mean by "Guy took a six speed with a brown lite out"? Do these things work all the time or can they be disengaged to to run the stock gearing? Sorry, I obviously know squat about these, but like the concept. Will they hold up to towing? I remember years ago, on TDS, there was a guy that towed quite heavy and he felt these were not up to the task.

2002 f-350 PSD, 4x4, cc short bed, 6spd, ccv mod, airdog, AIS filter, isspro ev and scangauges, detroit TT, ITP boost annihalator, ITP RR, bellowed up-pipes, ats housing, turbomaster, 3.5 dp magnaflow, very happy with ultra smooth and linear PHP 50t, 80DD and "whisper" tunes.
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