psd 4x4 low range
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psd 4x4 low range
a friend of mine has a 06 psd 4x4 f350 dullie and it will not go into 4 wheel low.He has put the tranny in nutral and the switch on the dash to 4 low but it dosen't engage.is this a warranty problem or is he not doing something right?
Postmaster
Joined: Dec 2003
Posts: 4,196
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From: Arizona
grumpy16,
Welcome to FTE lots of good people and info around here
To engage 4x4 low the flowing steps must ocurr.
1) Transmission in neutral
2) Foot on brake.
3) Forward speed less than 3mph (preferably stopped)
4) Select 4x4 Low.
Hope this helps
Welcome to FTE lots of good people and info around here
To engage 4x4 low the flowing steps must ocurr.
1) Transmission in neutral
2) Foot on brake.
3) Forward speed less than 3mph (preferably stopped)
4) Select 4x4 Low.
Hope this helps
Freshman User
Joined: Aug 2005
Posts: 49
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From: Windsor Ontario Canada
Originally Posted by 99 SD Snowbuster
Dont forget the hubs have to be in the lock position, not auto for 4 lo to work also...
But do exactly as blackhat620 says and it should work.
Senior User
Joined: Sep 2005
Posts: 157
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From: New Orleans
Originally Posted by 99 SD Snowbuster
Dont forget the hubs have to be in the lock position, not auto for 4 lo to work also...
My process:
1. Roll along in D about 5 mph.
2. Select 4hi, let it engage.
3. Stop, put trans in N.
4. Select 4lo.
5. Place in D.
You'll know it's engaged when you put it in D. It will try to overpower the brakes.
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 10
From: Arizona
sonicblue2003,
Yes diesels use a seperate vacuum pump to operate all vacuum controlled components on the truck.
Hope this helps
Yes diesels use a seperate vacuum pump to operate all vacuum controlled components on the truck.
Hope this helps
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Postmaster
Joined: Dec 2003
Posts: 4,196
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From: Arizona
2002f2507.3LPS
Well on the 6.0 PSD it is on the Passenger side fender.
I don't remember the location on the 7.3L i will have to look and post back.
If you look under your hood you should be able to spot the hard plastic vacuum line and trace it back to the pump. The line usually T's after the pump with a line running through the firewall into the interior of the cab and a line running over around the engine compartment etc.
Hope this helps
Well on the 6.0 PSD it is on the Passenger side fender.
I don't remember the location on the 7.3L i will have to look and post back.
If you look under your hood you should be able to spot the hard plastic vacuum line and trace it back to the pump. The line usually T's after the pump with a line running through the firewall into the interior of the cab and a line running over around the engine compartment etc.
Hope this helps
Freshman User
Joined: Aug 2005
Posts: 49
Likes: 0
From: Windsor Ontario Canada
Originally Posted by blackhat620
sonicblue2003,
Yes diesels use a seperate vacuum pump to operate all vacuum controlled components on the truck.
Hope this helps
Yes diesels use a seperate vacuum pump to operate all vacuum controlled components on the truck.
Hope this helps
I had an idea that they did to control the HVAC stuff but I wasn't sure.
Junior User
Joined: Jun 2004
Posts: 57
Likes: 0
From: Washington Coast
Originally Posted by booker250
Nope. It will go into 4lo on "auto".
My process:
1. Roll along in D about 5 mph.
2. Select 4hi, let it engage.
3. Stop, put trans in N.
4. Select 4lo.
5. Place in D.
You'll know it's engaged when you put it in D. It will try to overpower the brakes.
My process:
1. Roll along in D about 5 mph.
2. Select 4hi, let it engage.
3. Stop, put trans in N.
4. Select 4lo.
5. Place in D.
You'll know it's engaged when you put it in D. It will try to overpower the brakes.
Senior User
Joined: Oct 2006
Posts: 320
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From: Salem, OR
i always have had the manuel lever for this reson, but the trick i have seen is shift to 4lo while in D going around 3-5mph put into N and slightly press break to more coast to a stop, then if it dont go in stick it in R and back up, put in N, hit break and roll to a stop. just kind of rock it like that till it works. dont be afraid to let it sit in N at a stop before trying the R...this is also how i have seen to get it to shift out. also is he going strait or turning?