[bushpilot]

Looking for pricing & shipping (77377) -

2004 F350, ESOF 4x4, 5r110 Auto, with 3.73 rear.

 

[bushpilot]

Ordered ! should have it in 7-10 days - look for updates/install pictures and information here.

 

[bushpilot]

using the factory published gearing for the 5r110

I was able to use a spread sheet to calculate the RPM reduction of the
gearvendors dbl overdrive once my tire size & rear gearing was input -

 

[bushpilot]

Attaching the spreadsheet 'case anyone wants do their own calculations.

Just change the Fields that are hi-lighted in YELLOW to calculate for different tire sizes or rear gearing.

If anyone w/ a 2011+ 6r140 wants to do these calculation theyll need to change the gear ratio too.

 

[bushpilot]

forum wouldnt let me attach the '07 xlsx format so its been converted to an xls

ADMINS: feel free to merge the two posts.

 

[bushpilot]

Got shipping notice last night - the DBL Overdrive unit should be delivered thrusday.
I should be able to get the unit bolted up by friday worst case, measured and take
the drive shaft to be cut down sometime friday !

Hopefully I'll have it all back together saturday !

 

[wastedwagesracing]

Sounds good, I look froward to reading your post on the results of your mod.

 

[bushpilot]

PROGESS -

 

[robs97z28]

I thought the 6.0L already had a 6 speed. I have been eye balling the GV. i have heard great things about them. It is just hard to get over the price.

 

[bushpilot]

I thought the 6.0L already had a 6 speed. I have been eye balling the GV. i have heard great things about them. It is just hard to get over the price.

the 5r110 (2003-2009) uses a "6" speed tranny - only 5 gears are ever used.
there is an alternate gear/strategy that is used in COLD climates, and
when the tranny is still cold.

the new 6r140 (2010+) uses 6 gears and completely different ratios.

Ive posted gearing/ratios for both transmissions, along w/ an RPM chart
which shows a 500rpm drop (for a 5r110 w/ 3.73s). Trucks w/ 4.10s or
lower gearing will have a higher RPM drop (600RPM) compared to what
they currently run (w/out a GV Unit).

Im not interested in gear splitting (although you can, w/ the GV unit), theres
just not a tremendous benefit to be had from it.

Im interested in being able to run GOOD / Strong interstate speeds (75+) and
get better mpg...ive hi-lighted the current rpms (red) and what ill achieve w/
the GV unit installed (in green).

I considered re-gearing to 3.55's but that only gave me a 200 rpm drop, best
case - and for the 1800 bucks invested in re-gearing id be STUCK, unable
to tow & unable to ever get my $ back !

W/ the GV unit i keep the OE gearing, can tow w/ it on or off, and
i can always sell the gv unit and recoupe at least some of my money.

fuel prices are on the rise again, if id done this when the truck was new,
it would have paid for itself by now.

 

[robs97z28]

ok, your telling me we have 6 speeds, BUT the tranny only uses 5 of them. :wtf

 

[bushpilot]

ok, your telling me we have 6 speeds, BUT the tranny only uses 5 of them. :wtf

yup & at the end of the day whats it matter - your RPMs on the
interstate are STILL too high to 1) keep up w/ traffic and 2) get decent
mpg.

75mph at 1630rpm will be nice (im guessing thatll be close to 21mpg) !
but im really lookin' forward to runnin' 95mph @ 2000rpm

 

[Trip]

yup & at the end of the day whats it matter - your RPMs on the
interstate are STILL too high to 1) keep up w/ traffic and 2) get decent
mpg.

75mph at 1630rpm will be nice (im guessing thatll be close to 21mpg) !
but im really lookin' forward to runnin' 95mph @ 2000rpm

Subscribed to thread:happymugs

Are you on stock tires?? I am sitting darn close to where you are going to be, I have 3.73 rears and dont know how your 2-300rpms higher than me at same speed. My readings should be the same as a standard 4X4 as I havent recalibrated the dash for my tires, So when my truck is telling me I am pushing 1750rpm at 72mph I am really going closer to 76~79mph (LIDAR verified) or so and as long as I dont shut the motor down I see 20+mpg easy. It is the warm up cycle that kills my mpg, I know as I see a differance from 330miles per tank or 440

In other words I WANT MORE SPECS ON YOUR TRUCK pleaseopcorn

 

[Trip]

ok, your telling me we have 6 speeds, BUT the tranny only uses 5 of them. :wtf

Slight hijack, but what would be nice would be if you could get the trans rebuilt with (is it fourth that is the <5* gear?) The unused gear to be replaced with the next gear up, so 5th sits where 4th was 6th sits where 5 was and there is then a super overdrive installed where 6th was. then get the trans programed to run all 6 gears unless tow haul is activated then only the first 5 run, the standard set.
But I guess thats just wishful thinkingopcorn

 

[bushpilot]

Subscribed to thread:happymugs

Are you on stock tires?? I am sitting darn close to where you are going to be, I have 3.73 rears and dont know how your 2-300rpms higher than me at same speed. My readings should be the same as a standard 4X4 as I havent recalibrated the dash for my tires, So when my truck is telling me I am pushing 1750rpm at 72mph I am really going closer to 76~79mph (LIDAR verified) or so and as long as I dont shut the motor down I see 20+mpg easy. It is the warm up cycle that kills my mpg, I know as I see a differance from 330miles per tank or 440

In other words I WANT MORE SPECS ON YOUR TRUCK pleaseopcorn

16 inch wheels and stock tires put me at about 32 inches.
I suspect your larger tires / wheels are having a pretty big impact
on your rpm/speed.

your tank to tank range seems low, you must be short bed.

 

[bushpilot]

presents for me !

ive already ripped their UGLY switch box apart and confirmed i can use
matching switches of my own

the indication/operating mode lights also come outta their box - looks like i
can mount them in the dash, possibly near my in-dash radar detector display !

 

[bushpilot]

diagram -

 

[bushpilot]

considering where i can place these UGLY indicator lights -
they look like they were manufactured in the 60s !

Should be an easy modification (small 12v bulbs) - the wiring harness
on this set up is REALLY nice, just 3 wires thru the firewall & EVERYTHING
connects to a main control unit via rj11 (modular phone) jack.

 

[bushpilot]

more pictures - parts laid out -

 

[merlin5577]

Don, have you figured out the payback time frame yet? Or do you need to see the post install real world fuel economy numbers to figure that out? Just curious.