Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 


Reply
 
Thread Tools Display Modes
 
Old 12-01-2009, 12:47 PM   #1
Junior Member
 
Join Date: Oct 2009
Posts: 3
Speedo Errors in 4 Low

My 2004, 6.0 4x4 SMB's Speedo does not register properly in 4 Lo. The speed is approximatley off by the gear ratio of the Atlas Transfer Case. Anyone figured out to how make the speed and I assume odometer work in 4 Low?

Tonka2004 is offline   Reply With Quote
Old 12-01-2009, 06:26 PM   #2
Senior Member
 
yvrr's Avatar
 
Join Date: Oct 2007
Location: Newark, CA
Posts: 795
Re: Speedo Errors in 4 Low

Use a GPS....
__________________
Jack
'01 Ford EB50p Quigley 4WD
yvrr is offline   Reply With Quote
Old 12-01-2009, 06:30 PM   #3
Senior Member
 
Ford_6L_E350's Avatar
 
Join Date: May 2007
Location: Washington - Ridgefield
Posts: 4,728
Re: Speedo Errors in 4 Low

It's not going to happen. The van doesn't have the software capability of knowing lo range and correcting the speedo for it.

One of the disadvantages of a non-factory conversion. I guess a non-factory conversion could be made to work if the factory had a true 4wd model that the software/hardware could be borrowed from, but they don't and you can't.

Ok, maybe you could. But I don't think any of us could afford the costs.

Mike
__________________
Alaska to Key West, Labrador and more
Prostate cancer survivor. See Thread Prostate cancer and Sportsmobiles
2015 VW GTI 2020 Fiat 124 Spider
2012 E250 Hitop camper
Ford_6L_E350 is offline   Reply With Quote
Old 12-01-2009, 11:00 PM   #4
Site Team
 
BroncoHauler's Avatar
 
Join Date: May 2007
Location: Southern New Mexico
Posts: 10,176
Re: Speedo Errors in 4 Low

IIRC, the speedo is driven off a speedo gear attached to the transfer case. So you can either have it be accurate in Hi or Low, but not both. And yes, it will throw off your odometer, so you can't trust the "bear left after 4.6 miles" directions you get from your friends.


Herb
__________________
SMB-less as of 02/04/2012. Our savings account is richer, but our adventures are poorer.
BroncoHauler is offline   Reply With Quote
Old 12-02-2009, 10:18 AM   #5
Senior Member
 
bitburger's Avatar
 
Join Date: Oct 2007
Location: Seattle-ish, WA
Posts: 269
Re: Speedo Errors in 4 Low

There is the same issue with the Quadvan conversion. I don't use the 4WD-LO very often so it hasn't been an issue for me. I use the GPS for distances.
__________________

2008 SMB EB-52, Quadvan 4x4, 6.0 PSD SOLD
2017 Ford Transit T250 148WB mid-roof w/ Quadvan 4x4
bitburger is offline   Reply With Quote
Old 12-02-2009, 10:35 AM   #6
Senior Member
 
geoffff's Avatar
 
Join Date: Apr 2007
Location: Seattle, WA
Posts: 1,061
Re: Speedo Errors in 4 Low

Anyone know offhand what the usual Atlas II transfer case ratio is in a Sportsmobile? The Sportsmobile website says either a 3.0:1 or 3.8:1 gear ratio.

-- Geoff
__________________
2004 Ford, SMB 4x4, RB-50
https://octopup.org/sportsmobile
geoffff is offline   Reply With Quote
Old 12-02-2009, 07:47 PM   #7
Senior Member
 
Join Date: Apr 2008
Location: Carmel Valley, CA
Posts: 634
Send a message via AIM to Skywagon
Re: Speedo Errors in 4 Low

I've had about 50 4WD vehicles, and I don't think I've ever had one that told the correct speed in 4 Low
Bill
__________________
2008 RB 50 Pueblo gold, Diesel, 4X4, Aluminess
NO2B
Skywagon is offline   Reply With Quote
Old 12-02-2009, 11:08 PM   #8
Senior Member
 
carringb's Avatar
 
Join Date: Jan 2009
Location: Corvallis, OR
Posts: 5,300
Re: Speedo Errors in 4 Low

QuadVan told me I can connect 4wd-low input under the hood (with the PTO/CTO wires) to the transfer case (will be electronic) and my speedo will be accurate in low range. Maybe diesels don't have that input?
__________________
2000 E450 dually V10 wagon
carringb is offline   Reply With Quote
Old 12-03-2009, 12:06 AM   #9
Senior Member
 
geoffff's Avatar
 
Join Date: Apr 2007
Location: Seattle, WA
Posts: 1,061
Re: Speedo Errors in 4 Low

Maybe I'll just have to go out and drive around in 4-low with my GPS to find my ratio for myself

-- Geoff
__________________
2004 Ford, SMB 4x4, RB-50
https://octopup.org/sportsmobile
geoffff is offline   Reply With Quote
Old 12-03-2009, 07:24 AM   #10
Senior Member
 
Join Date: Oct 2007
Location: Azusa, California
Posts: 1,092
Re: Speedo Errors in 4 Low

Geoff ,
That sounds like a great excuse for an Adventure ! Herb and Bill were both correct in that you will get a reading in Hi or Lo but not both , and the readings are never truly accurate .
Greggde
Greggd is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Sportsmobile SIP or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 02:11 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.