Go Back   Ford F150 Forum - Community of Ford Truck Fans > Ford F150 Forums > Off-Road Section
Sign in using an external account
Register Forgot Password?


Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 07-30-2014, 07:30 PM   #1
Junior Member
 
Join Date: Jul 2014
Posts: 6
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Question 4x4 low range shift points

When in 4x4 low, in drive, my truck revs to 3500-4000 rpm before it shifts to the next gear.
This can't be right ?
Anyone with same problem ?
MIKE173 is offline   Reply With Quote
Old 08-04-2014, 08:21 PM   #2
Member
 
Join Date: Jul 2014
Posts: 30
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Mine dies the same thing. Its cause the gearing is so low. Four low is only for very low speed uses.
m.i.k.e. is offline   Reply With Quote
Old 08-05-2014, 03:25 PM   #3
Junior Member
 
Join Date: Jul 2014
Posts: 6
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default low

thanks,
i understand low range is for going real slow.
what i don't get is why it revs so high before shifting.
rear gear(3.73) should have nothing to do with how high the motor revs.
before it shifts to the next higher gear.
i need more explaining.

thanks again
MIKE173 is offline   Reply With Quote
Old 08-05-2014, 03:33 PM   #4
Member
 
Join Date: Jul 2014
Posts: 30
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Not the gears in your diff the gearing inside the transfer case is very high
m.i.k.e. is offline   Reply With Quote
Old 08-05-2014, 03:41 PM   #5
Member
 
Join Date: Jul 2014
Posts: 30
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Plus if I remember right from my ford training it changes the shift points in the transmission to keep it in low gears like first and second. It does that so like if your crawling thru rocks or whatever you don't really want it shifting up at like 2500 rpm so it keeps it in that gear for longer.
m.i.k.e. is offline   Reply With Quote
Old 08-06-2014, 08:04 AM   #6
Mark
5 Year Member
 
techrep's Avatar
 
Join Date: Jan 2009
Location: Va. Beach, VA.
Posts: 17,722
Mentioned: 8 Post(s)
Thanked 392 Times in 344 Posts
Feedback Score: 1 reviews
Default

Quote:
Originally Posted by MIKE173 View Post
When in 4x4 low, in drive, my truck revs to 3500-4000 rpm before it shifts to the next gear.
This can't be right ?
Anyone with same problem ?
This is Normal operation for 4LO
__________________
08 FX4... Flowmaster Exhaust, line-X, Sky Jacker leveling kit. 295/65/20 Nitto trails mounted on 20 X 9 Carol Shelby wheels. AIRAID CAI. Harley headlamps and LED Tails & 3rd brake lights,custom upper and lower Grill. Edge Evolution. Interior/Exterior LED lighting, NFAB step bars.
techrep is offline   Reply With Quote
Old 08-06-2014, 11:15 AM   #7
Junior Member
 
Join Date: Jul 2014
Posts: 6
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default 4x4 low

thanks for the help.
i guess i'm ok.
just seems like overkill to me.
i would think it should work close to the same as it does when in high range, shifting at the current load or throttle setting.
then if you need it to rev higher, then move the trans to "m",
& then you can rev it to whatever.

thanks much
mike
MIKE173 is offline   Reply With Quote
Old 08-06-2014, 01:06 PM   #8
Member
 
Join Date: Jul 2014
Posts: 30
Mentioned: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Default

Yeah I'm not sure what the thinking was on it. Probably so no one blows up the gears in the transfer case from trying to go to fast
m.i.k.e. is offline   Reply With Quote
Old 08-06-2014, 01:47 PM   #9
Mark
5 Year Member
 
techrep's Avatar
 
Join Date: Jan 2009
Location: Va. Beach, VA.
Posts: 17,722
Mentioned: 8 Post(s)
Thanked 392 Times in 344 Posts
Feedback Score: 1 reviews
Default

it shifts well before the red line...it wont blow up...lol
__________________
08 FX4... Flowmaster Exhaust, line-X, Sky Jacker leveling kit. 295/65/20 Nitto trails mounted on 20 X 9 Carol Shelby wheels. AIRAID CAI. Harley headlamps and LED Tails & 3rd brake lights,custom upper and lower Grill. Edge Evolution. Interior/Exterior LED lighting, NFAB step bars.
techrep is offline   Reply With Quote
Old 08-06-2014, 02:31 PM   #10
Senior Member
 
Join Date: Nov 2013
Location: Euless, Tx
Posts: 563
Mentioned: 3 Post(s)
Thanked 54 Times in 45 Posts
Feedback Score: 0 reviews
Default

They probably changed the shift points so you can descend slowly without having to brake. You may be able to use the M mode on the shifter to control your shifting.
__________________
2011 F150 4X4, 5.0, Scab, Lbed, HD Payload Package, Blue Flame Metallic, ARE Shell, Kappa 602.11cfX4, Dually reverse lights, Dually high beams, DD3, Kenwood DNX890 with Maestro, NVX MVPA4 and MVPA1, JL Audio 10TW3 subwooofer in custom cabinet, Billnvic HIDs, RCI Metalworks skidplates.
Feathermerchant is online now   Reply With Quote
Old 08-06-2014, 02:31 PM
 
 
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Join F150 Forum

 

The Mustang Source
All times are GMT -4. The time now is 11:04 PM.


Copyright 2006 - 20011 F150forum.com
This site is in no way affiliated with the Ford Motor Company.