th350 fairbanks kit down shift problems - 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 07-30-2011, 10:23 PM
Registered User
 
Join Date: Jul 2011
Location: ohio
Posts: 10
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
th350 fairbanks kit down shift problems

im having problems with a fairbanks shift kit . i installed as per the instruction and made it full man valve body as per instructions. problem is it shifts great up shifting but will not manually shift back into first untill im almost at a dead stop. this is in a mud bog truck and i really need it to down shift under full throttle when needed. any suggestions?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 07-31-2011, 08:57 AM
Crosley's Avatar
Hotrodders.com Moderator
 
Last wiki edit: T-350 rebuild tech
Last journal entry: Bar under the dash
Last photo:
Join Date: Nov 2002
Location: ... USA
Posts: 8,081
Wiki Edits: 1659

Thanks: 328
Thanked 99 Times in 95 Posts
Quote:
Originally Posted by bink32
im having problems with a fairbanks shift kit . i installed as per the instruction and made it full man valve body as per instructions. problem is it shifts great up shifting but will not manually shift back into first untill im almost at a dead stop. this is in a mud bog truck and i really need it to down shift under full throttle when needed. any suggestions?

Since I do not know how the Fairbanks kit is designed... and I doubt the kit is too different from a TransGo kit.

Is the governor used in the Fairbanks kit? Or is it eliminated?

Vacuum modulator used or removed?

My guess is the governor circuit is flooded and the trans will not bump back to first like it should. This happens in a TransGo kit install about 2 out of 10 times.

A hole is drilled into the governor circuit may help. About .065 size hole is a good size to start. Valve body removal is needed. Drill the hole in the circuit at the rear of the v-body is easiest
__________________
Some people are like Slinkies... Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.

Last edited by Crosley; 07-31-2011 at 09:11 AM.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-31-2011, 09:10 AM
Registered User
 
Join Date: Jul 2011
Location: ohio
Posts: 10
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Crosley
Since I do not know how the Fairbanks kit is designed... and I doubt the kit is too different from a TransGo kit.

Is the governor used in the Fairbanks kit? Or is it eliminated?

Vacuum modulator used or removed?

My guess is the governor circuit is flooded and the trans will not bump back to first like it should. This happens in a TransGo kit install about 2 out of 10 times.

A holes drilled into the governor circuit may help. About .065 size hole is a good size to start. Valve body removal is needed. Drill the hole in the circuit at the rear of the v-body is easiest
governor is used with springs to hold wide open the modulator is there but no vac to it . the instruction say to leave modulator in but not use vac to it. however it does give an option to remove it and use a plud to hold the valve.,but the instruction say not to use the plug if using the manual valve body option
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 07-31-2011, 09:14 AM
Crosley's Avatar
Hotrodders.com Moderator
 
Last wiki edit: T-350 rebuild tech
Last journal entry: Bar under the dash
Last photo:
Join Date: Nov 2002
Location: ... USA
Posts: 8,081
Wiki Edits: 1659

Thanks: 328
Thanked 99 Times in 95 Posts
Quote:
Originally Posted by bink32
governor is used with springs to hold wide open the modulator is there but no vac to it . the instruction say to leave modulator in but not use vac to it. however it does give an option to remove it and use a plud to hold the valve.,but the instruction say not to use the plug if using the manual valve body option

Vacuum modulator is there to blow off pressure in reverse. Reverse pressure can go over 300 if a aluminum plug is installed in place of the vacuum modulaotor

Sounds like this kit is similar to TransGo. The hole in the governor circuit should fix the problem. The hole plows off some pressure to allow the down shift to first
__________________
Some people are like Slinkies... Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 07-31-2011, 09:32 AM
Registered User
 
Join Date: Jul 2011
Location: ohio
Posts: 10
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Crosley
Vacuum modulator is there to blow off pressure in reverse. Reverse pressure can go over 300 if a aluminum plug is installed in place of the vacuum modulaotor

Sounds like this kit is similar to TransGo. The hole in the governor circuit should fix the problem. The hole plows off some pressure to allow the down shift to first
thank you ill give it a try!!!
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 07-31-2011, 10:12 AM
Registered User
 
Join Date: Jul 2011
Location: ohio
Posts: 10
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Crosley
Vacuum modulator is there to blow off pressure in reverse. Reverse pressure can go over 300 if a aluminum plug is installed in place of the vacuum modulaotor

Sounds like this kit is similar to TransGo. The hole in the governor circuit should fix the problem. The hole plows off some pressure to allow the down shift to first
i just want to be correct drill a hole in the governer circuit anywhere at the rear of the case correct? i just dont want to put it in the wrong place. if you had a diagram that would be great again just dont want to put it in wrong place.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 07-31-2011, 10:27 AM
Registered User
 
Join Date: Feb 2011
Location: 10312
Posts: 135
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
fairbanks

its exactly the same as a transgo system try what crosley sugested,those kits are made by superior they put a fairbanks logo on them(fairbanks have not been in business in years )
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 07-31-2011, 10:41 AM
Registered User
 
Join Date: Jul 2011
Location: ohio
Posts: 10
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by anglia427
its exactly the same as a transgo system try what crosley sugested,those kits are made by superior they put a fairbanks logo on them(fairbanks have not been in business in years )
im not sure i totaly understand where to drill the hole at? drill it in the case ? where will the excess fluid go just dont want to mess it up
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 07-31-2011, 11:03 AM
Crosley's Avatar
Hotrodders.com Moderator
 
Last wiki edit: T-350 rebuild tech
Last journal entry: Bar under the dash
Last photo:
Join Date: Nov 2002
Location: ... USA
Posts: 8,081
Wiki Edits: 1659

Thanks: 328
Thanked 99 Times in 95 Posts
Remove the valve body and drill the hole in the valve body. In the governor circuit at the rear of the valve body.

You installed the kit, I figure you know a little about the transmission?
__________________
Some people are like Slinkies... Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 07-31-2011, 11:15 AM
Registered User
 
Join Date: Jul 2011
Location: ohio
Posts: 10
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Crosley
Remove the valve body and drill the hole in the valve body. In the governor circuit at the rear of the valve body.

You installed the kit, I figure you know a little about the transmission?
ok got thanks i thought that just wanted to be sure it was there and not the case side thanks
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 07-31-2011, 01:01 PM
Registered User
 
Join Date: Jul 2011
Location: ohio
Posts: 10
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Crosley
Since I do not know how the Fairbanks kit is designed... and I doubt the kit is too different from a TransGo kit.

Is the governor used in the Fairbanks kit? Or is it eliminated?

Vacuum modulator used or removed?

My guess is the governor circuit is flooded and the trans will not bump back to first like it should. This happens in a TransGo kit install about 2 out of 10 times.

A hole is drilled into the governor circuit may help. About .065 size hole is a good size to start. Valve body removal is needed. Drill the hole in the circuit at the rear of the v-body is easiest
thank you again works like a champ !!!!!
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 shift problems razzygirl Transmission - Rearend 1 05-15-2011 11:43 AM
th350 shift kit jgh64pkup Transmission - Rearend 16 12-10-2009 08:50 PM
th350 won't shift out of first tilyn62 Transmission - Rearend 3 09-19-2007 09:27 PM
What will a TH350 Handle? Many Th350 Quetions, Shift kits? Warrant Transmission - Rearend 2 12-18-2005 09:46 PM
TH350 won't shift down to first conestogaman Transmission - Rearend 2 12-15-2004 10:27 AM


All times are GMT -6. The time now is 05:53 AM.


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.