4R100 wont engage Drive unless reved every time - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old 11-19-2009, 07:34 PM Thread Starter
PSN Newb
 
Join Date: Nov 2009
Posts: 9
4R100 wont engage Drive unless reved every time

2002 F450. The 4r100 trans has been doing this for 20k miles. Does not matter if warm or cold. Can drive it 400 miles and it will do it instantly. The issue is if you put the trans in Drive (or 1st) it does not engage and needs reved to 1,500- 2,000 RPM and then engages. From then on as long as you donít shift out of Drive it stays engaged. If you shift to R and back it needs reved. I have pulled 15,000 lb. loads 800 miles miltiple times and hauled 20-30 cars behind this truck over the past few years with it this way. It has not changed. Also, Reverse engages instantly even when cold. Any ideas? I know if I take it to a trans shop they are going to say it needs rebuilt and it will be $4,000.
PCweber is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 11-19-2009, 07:38 PM
PSN Veteran
 
Join Date: Oct 2009
Location: arizona
Posts: 782
Re: 4R100 wont engage Drive unless reved every time

Quote:
Originally Posted by PCweber View Post
2002 F450. The 4r100 trans has been doing this for 20k miles. Does not matter if warm or cold. Can drive it 400 miles and it will do it instantly. The issue is if you put the trans in Drive (or 1st) it does not engage and needs reved to 1,500- 2,000 RPM and then engages. From then on as long as you donít shift out of Drive it stays engaged. If you shift to R and back it needs reved. I have pulled 15,000 lb. loads 800 miles miltiple times and hauled 20-30 cars behind this truck over the past few years with it this way. It has not changed. Also, Reverse engages instantly even when cold. Any ideas? I know if I take it to a trans shop they are going to say it needs rebuilt and it will be $4,000.
STUPID QUESTION BUT HAVE YOU CHECKED THE FLUID LEVEL?

01 c/c sb 8 inch lift 39.5 swampers (ON THE ROAD AGAIN)
00 F450 (SOLD)
newest addition 06 F150 (STOCK)SSHHHHHH don't tell her its a work truck!

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
hold my beer & watch this sh1t!!
8inchstroker is offline  
post #3 of 7 (permalink) Old 11-20-2009, 08:12 PM Thread Starter
PSN Newb
 
Join Date: Nov 2009
Posts: 9
Re: 4R100 wont engage Drive unless reved every time

Affirmative. It is a tad over full even.
PCweber is offline  
 
post #4 of 7 (permalink) Old 11-20-2009, 08:19 PM
PSN Veteran
 
woodduck97's Avatar
 
Join Date: Nov 2008
Location: Maryland
Posts: 2,552
Re: 4R100 wont engage Drive unless reved every time

I dont have any idea on what is going on but if you plan on getting a trannsmisson give BTS transmisson a call or John Woods. They will fix you.

1997 Ford F-250 Sleeper Edition
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
woodduck97 is offline  
post #5 of 7 (permalink) Old 11-26-2009, 02:09 PM
PSN Newb
 
Join Date: Nov 2009
Posts: 3
Re: 4R100 wont engage Drive unless reved every time

check vacum pump
whit7452 is offline  
post #6 of 7 (permalink) Old 11-26-2009, 03:58 PM
Former Ford Trans Engr.
 
Mark Kovalsky's Avatar
 
Join Date: Aug 2007
Location: SE Florida
Posts: 3,025
Re: 4R100 wont engage Drive unless reved every time

Now you got me curious. How could the vacuum pump be related to the transmission?
Mark Kovalsky is offline  
post #7 of 7 (permalink) Old 11-26-2009, 04:03 PM
FREE THINKER
 
Chip's Avatar
 
Join Date: Mar 2008
Location: Galveston TX.
Posts: 703
Re: 4R100 wont engage Drive unless reved every time

Quote:
Originally Posted by Mark Kovalsky View Post
Now you got me curious. How could the vacuum pump be related to the transmission?
also curious.

1999 7.3, 2wd ,auto
Chip is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the PowerStrokeNation : Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome