How to clean a valve body? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 04-06-2005, 08:17 PM
Member
 
Last wiki edit: Calculating tire size
Last journal entry: Changes...
Last photo:
Join Date: Oct 2003
Location: Montreal
Age: 29
Posts: 532
Wiki Edits: 2

Thanks: 0
Thanked 2 Times in 2 Posts
How to clean a valve body?

I just installed a ford AOD transmssion in a '88 t-bird behind a 5.0, and it won't come out of first gear. It worked last fall when I pulled it off another car. It had 110,000 miles on the original fluid. The transmission sat sideways for a few days before I installed it. I'm thinking maybe something got disturbed and a valve is sticking or something? I have a spare burnt out transmission so I took out the valve body and governor, and I want to clean them up and swap them in to try and fix this problem. Should I take apart the valve body to clean it, or should I just leave it together and soak it in something? If I take the top off the valve body will springs and balls fly out and make it impossible to put back?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 04-06-2005, 08:48 PM
Member
 
Last photo:
Join Date: Oct 2003
Location: Gordonville MO
Age: 67
Posts: 307
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Did you check the throttle valve pressure? Go to the TCI trans website
for instructions. The gauge block they talk about is .396" to .400" thick.
You can cut a short chunk of 7/16" bolt and saw a narrow slot in in
lengthwise part way thru just wide enuf to fit over the cable when
you pull the grommet out of the housing at the throttle arm.
I just use a good quality 50 or 100 psi oil pressure gauge with a wide
sweep so you can get an accurate reading.

Is the return spring on the tv cable at the trans inside of the rubber
sleeve connected so it forces the tv cable back to "zero" when you
let off the throttle?

If you've adjusted the idle, you need to readjust the tv pressure.

Or your governor could be sticking, it's inside the tailshaft housing.

Or your valve body (most likely) is sticking.

The only things that have springs behind them are two tiny
valves near one end of the valve body. Set the valve body
on a bench with the thin plate up. Loosen the bolts on the
round plates and remove them slowly, you'll feel a little spring
pressure pushing the thin plate upwards. You'll see the little
balls after you remove the thin (separator) plate. They won't
fall out unless you tilt the valve body. But you need to make
sure you remember where they go.

send me your email, I can send you a scan of the factory
manual, the part about taking the valves out and cleaning
them. There's lots of little parts, but if you lay them out
in sequence and be very careful not to disturb them and then
put them back in the exact same way they came out, it's
not that big of a deal. Just takes awhile. The schematic
shows each little part and how it goes. After you get
the parts out, soak it good with carb spray and blow out
with comp air. If you have some small soft bristle brushes
that are round, you could go in the bores and do some
cleaning. You can use very fine crocus or emery cloth
and gently polish the valves. Just be sure to rinse
very thoroughly with carb spray and blow dry a couple
times to get all tiny particles out.

macxx1@excite.com

Also, AOD's have a couple valves that like to wear out.
See the Sonnax web site for better quality replacements.
They're the throttle valve, and the combination main
regulator and pressure boost valves.


When you reassemble, be sure to get new gaskets
and torque the bolts to specs with a good inch lb
torque wrench. 80 to 100 inch lbs.
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
TH350 Manual Valve Question Pantload Transmission - Rearend 6 02-19-2006 01:48 PM
Manuel Valve Body danarmstrong Transmission - Rearend 2 11-07-2004 08:19 AM
GM fast burn heads batman09 Engine 1 10-26-2004 09:32 AM
oil being sucked threw the pcv valve on my 350 sb.. Robbie Engine 23 05-08-2004 09:12 AM
Stock eliminator 78 monte Engine 5 01-02-2003 05:10 AM


All times are GMT -6. The time now is 01:40 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.