New build - 1991 BornFree ford class B 7.3 diesel 4x4

bugwhacker

Observer
I am thinking of cable shifting it and putting my shifters in a more convenient place though I haven't worked out just where yet. Maybe on the left hand side of the drivers seat.

Can do this without transfer case mods too. Shift into 4lo but don't lock the hubs and you'll be in 2lo. Done this a lot spotting campers and launching boats.

If you want to twin stick it, go for it but for the reasons you've named I'd skip it. An extra shifter in the floor is just in the way in a van you'll be in for months or a small rig like a jeep. I had an M38A1 with t90, OE twin-sticked Spicer 18, and a warn OD. that's 4 shifters plus a floor mounted parking brake between the seats. Neat conversation piece but it took forever to teach anyone to drive and had no room to get comfortable with that jungle-gym between the seats.
 

bugwhacker

Observer
I went to the junkyard today with a tape measure this time and the answer is at least 1985 up until 2001 the spring perch width for the e250 - e350 vans is the same at 48 3/4" ish. So the 2000 disc brake axles will swap right over. I was too cold to check for ratios and what not today after I spent a half hour taking off a nice Hydra-boost unit from a 2000 E450 super duty bus. No power steering pump on that unit but I did find a twin return Saginaw pump on a ford truck that I will pull it when I go back next time. Its 15 degrees and snowing here today.

For anyone that has ever thought of doing Hydra-boost on their van I have spent some time in the junk yards looking for suitable donors that you don't have to modify the pedal linkage or build a big spacer for and none of them fit without extensive modifications/fabrications except the e-series hydra-boost units. Modifying the pedal linkage rod is a bad idea in general, it is in a peaned over socket connection that makes it difficult to remove/replace without proper tools and then you still need a replacement socket that also takes special tool. Yes, people do it and if I was just making a trail rig I might not care but since I am taking my unit out on the highway I am not risking it. The correct linkage size is so short that I am not even sure you could cut a super-duty truck or astro van linkage down and thread it then use a coupling nut to join it to an eye end. I paid $50 for my correct hydra-boost unit today with master cylinder/reservoir and all linkage rods, sensors for the cruise control and for brake trouble. You can find the correct ones just like mine on Ebay often for $100 - $150 used. As an added note the E-series hydra-boost has a slight downward tilt at the firewall mount that the f-series super duty doesn't have - it is mounted flat.

Not sure yet, it is supposed to be a direct bolt in but I haven't put a tape measure to it yet.

e450 hydraboost 1.jpg

e450 hydraboost 2.jpg

e450 hydraboost 3.jpg

e450 hydraboost 4.jpg

e450 hydraboost 5.jpg

I need to check but I think the brake pedal might be slightly different also since the hydra-boost unit is mounted at a downward angle and the vacuum booster is mounted flat. I believe that will make the actuator rod tipped up slightly on the hydra-boost unit resulting in a bad alignment of the rod. They really want to be perfectly in line and not at an angle. Back to the junk yard I go with the tape measure.
 
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Mwilliamshs

Explorer
Thanks!

After discussing 3rd gear, etc I reran the math

3.54, 31.8", 3rd gear, 55 mph, 2058 rpm. Probably as good as it gets.
 
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bugwhacker

Observer
That's the zone I am looking for. I am thinking I would like the 3.73 ratio a little better though to cruise closer to 50 and still have the power to get up to 75 before it runs out of lungs. I am seriously considering a turbo setup if I can find a nice used one for a van or I might work an extra weekend and buy the Hypermax setup.


I did a little more research and found some info on the 1999 - 2007 d60ff/disc axle's From the factory you could have 3 ratio's.

3.55 - 3.73 - 4.10 all with or without a trac-lock.

The BOM's are as follows


FORD Model 60/248 REAR E-350 VAN SRW - FULL FLOAT W/ABS

Bill of Material

1999

606109-1 STD 3.55
606109-2 T/L 3.55
606109-3 STD 3.73
606109-4 T/L 3.73
606109-5 STD 4.10
606109-6 T/L 4.10
606190-1 STD 3.55
606190-2 T/L 3.55
606190-3 STD 3.73
606190-4 T/L 3.73
606190-5 STD 4.10
606190-6 T/L 4.10
606209-1 STD 3.55
606209-2 T/L 3.55
606209-3 STD 3.73
606209-4 T/L 3.73
606209-5 STD 4.10
606209-6 T/L 4.10

1999.5

606232-1 STD 3.55
606232-2 T/L 3.55
606232-3 STD 3.73
606232-4 T/L 3.73
606232-5 STD 4.10
606232-6 T/L 4.10

2000.5

606314-1 STD 3.55
606314-2 T/L 3.55
606314-3 STD 3.73
606314-4 T/L 3.73
606314-5 STD 4.10
606314-6 T/L 4.10
606522-1 STD 3.55
606522-2 T/L 3.55
606522-3 STD 3.73
606522-4 T/L 3.73
606522-5 STD 4.10
606522-6 T/L 4.10

2001

606604-1 STD 3.55
606604-2 T/L 3.55
606604-3 STD 3.73
606604-4 T/L 3.73
606604-5 STD 4.10
606604-6 T/L 4.10

2004

607026-1 STD 3.55
607026-2 STD 3.73
607026-3 STD 4.10

2005

2002329-1 STD 3.55
2002329-2 T/L 3.55
2002329-3 STD 3.73
2002329-4 T/L 3.73
2002329-5 STD 4.10
2002329-6 T/L 4.10
2004457-1 STD 3.55
2004457-2 STD 3.73
2004457-3 STD 4.10

2007

2009200-1 STD 3.73

This is the list I am taking to the yard with me, these come from the Dana expert site and I am not sure if all of them have disc brakes or not but once you find a d60ff from these years with disc brakes you can search the bom on the list to find your ratio and hopefully a trac-loc limited slip to go with it.

There are also some d70ff listed on the site in the later years that came in the e350.

2008

2004198-1 STD 4.10
2004198-2 T/L 4.10
2011146-1 STD 4.10
2011146-2 T/L 4.10

2010

2013128-1 STD 3.73
2013128-2 T/L 3.73
2013128-3 STD 4.10
2013128-4 T/L 4.10
 
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bugwhacker

Observer
Hi-Ho Hi-Ho its off to the junk yard I go..

So today for $106 including tax and core charge I brought this home (U-pull it 40% off sale)

rearend.jpg 1999.5 e350 d60/disc brakes

rearend tag.jpg axle tag says its a 3.55 and open diff

wms - wms 67 inch.jpg WMS - WMS = 67"

inside springpad 46 inch.jpg Inside spring-pad width = 46"

spring center 49 inch.jpg Spring center = 49"

I have a d60 semi-floater with disc brakes that is a 3.73 with trac-loc for an e350 that I bought years ago to cut down for a drag car so I might use the locker out of it and maybe the gears. I still haven't decided if I want 3.55 or 3.73 for my ratio but I am leaning towards the 3.55. Maybe I can find someone to buy the 3.73 rear with locker for half the price of a real locker for my FF rear?
 
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bugwhacker

Observer
Pics of the inside of the Born-Free

Lots of room in this thing and it is wide and tall the full length but no wider on the outside than any econoline.

inside front.jpg

Inside rear.jpg

Blank slate, I have to open up the walls and see what there is for insulation and where they mounted the roll bars (supposedly only the camper company that uses roll bars?) So I can put the roof rack up for solar.
 

Mwilliamshs

Explorer
... (supposedly only the camper company that uses roll bars?)...[sic]

Funny was talking about it yesterday on Facebook, Winnebago Brave motorhomes (class A) got roll bars in 1974 I think, maybe 75.

Looks like a great start. Jealous of straight vertical walls!
 

bugwhacker

Observer
A fun place to mess around is the e-series van camper planner on http://sportsmobiledyo.com/dyo/

layout.jpg

This is basically what I am thinking with the bed that folds up into a couch ( The plan is a comfortable custom bed that folds into an okay bench seat for passengers. ), I couldn't figure out how to make it put the storage on the other side of the bed which is what I want.

I am making the bed an almost full bed size 50"x75"
 
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bdog1

Adventurer
Wheel hub patterns? 8x6/2". 8x170mm?

Swapping from 3:55 will require replacing diff. or a spacer behind the ring gear.


Sent from my iPhone using Tapatalk
 

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