Go Back   Ford Truck Enthusiasts Forums > Misc. > Clutch, Transmission, Differential, Axle & Transfer Case
Sign in using an external account
Register Forgot Password?


Clutch, Transmission, Differential, Axle & Transfer Case SPONSORED BY:

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 02-16-2011, 08:31 PM
bradleyj bradleyj is offline
Junior User
 
Join Date: Apr 2003
Posts: 61
bradleyj is starting off with a positive reputation.
4R100 Slipping & Shuddering in Reverse

I just drove my '02 7.3L Excursion home after having a new triple disk torque converter and Sonnax pressure regulator valve installed in the 4R100 tranny and when I was parking it at home I noticed that the transmission now slips and shudders in reverse. It was perfect before the install. No problems at all in forward. Fluid level is good. I shifted from forward to reverse like 20 times hoping that maybe some fluid circuits just needed to be filled, but it didn't help. I'm going to bring it back to the shop tomorrow, but anyone have any ideas of what might be going on here?
Reply With Quote
  #2 (permalink)  
Old 02-17-2011, 05:39 AM
Mark Kovalsky's Avatar
Mark Kovalsky Mark Kovalsky is offline
Post Fiend
 
Join Date: Aug 1999
Location: SE Florida
Posts: 10,783
Mark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputationMark Kovalsky has a superb reputation
Fluid circuits will totally fill the first time it's put in reverse. Something probably went wrong with the install.
__________________
Mark
Former Ford Automatic Transmission Engineer

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
Reply With Quote
  #3 (permalink)  
Old 02-17-2011, 06:27 AM
bradleyj bradleyj is offline
Junior User
 
Join Date: Apr 2003
Posts: 61
bradleyj is starting off with a positive reputation.
What could go wrong with a TC and PRV replacement that could affect only reverse? I would think that any problems associated with replacing these parts would be evident in all gears.
Reply With Quote
  #4 (permalink)  
Old 02-17-2011, 04:17 PM
jk080's Avatar
jk080 jk080 is online now
Gear Head
 
Join Date: Jul 2008
Location: North Georgia
Posts: 1,145
jk080 has a very good reputation on FTE.jk080 has a very good reputation on FTE.jk080 has a very good reputation on FTE.
Reverse requires a lot more line pressure to operate than the forward gears, if the pressure regulator valve train was improperly installed or has a problem it may not be able to produce the line pressure needed for reverse to work properly. The use of a pressure gauge will tell if the line pressure is sufficient or not.

Reverse line pressure at idle - 75-99 / stall - 240-265

Drive line pressure at idle - 55-65 / stall - 156 - 174
__________________
~~James~~

Master Certified Transmission Rebuilder of 27 years of all Makes and Models
Transmission Shop Owner and Operator
Reply With Quote
Old 02-17-2011, 04:17 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Misc. > Clutch, Transmission, Differential, Axle & Transfer Case

Tags
2006, 4r100, 96, f150, f350, forward, gears, problems, reverse, shudder, shuddering, slip, slips, transmission, truck, v10

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 08:31 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup