T-400 full manual conversion - 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 03-06-2003, 02:23 PM
New Member
 
Join Date: Mar 2003
Location: U.K
Posts: 20
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
T-400 full manual conversion

Hi, does anyone know how to convert a TH400 to full manual only operation (no auto shift) without using a kit or aftermarket valve body,i.e a home made conversion.
Hi Crosley,you sound like you know a bit about auto trans,perhaps you can help? I've already done most of the heavy duty mods cheaply,I'd like to be able to hold 1st and 2nd gears 'til I want to shift,for better dragstrip performance.
I also would like the same info on the TH350 box if anyone has it .Thanks.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 03-06-2003, 04:29 PM
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: 7,977
Wiki Edits: 1659

Thanks: 257
Thanked 85 Times in 82 Posts
You are talking about two different things.

************************************
__________________
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; 01-07-2009 at 07:20 PM.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 03-07-2003, 01:05 PM
New Member
 
Join Date: Mar 2003
Location: U.K
Posts: 20
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Crosley, I need a full manual shift for drag racing,I don't need any automatic features.Thanks.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 03-07-2003, 02:41 PM
roys63's Avatar
Member
 
Last photo:
Join Date: Dec 2001
Location: Nc
Age: 63
Posts: 907
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Thats right!
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 03-07-2003, 04:27 PM
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: 7,977
Wiki Edits: 1659

Thanks: 257
Thanked 85 Times in 82 Posts
Cool

this will require some photos emailed around the world.

I have the photos of the 1-2 shifts mods already.

There is a hole in the valve body to drill. This loops the governor oil after you do the following:

The govermor tubes between the valve body and case should be removed and tapped with a 3/8X16 tap and threaded plugs installed. Obviously the governor can now be removed.

Leave the vacuum off the modualator. Line pressure will go up, this is fine in drag racing. In 3rd gear the line pressure will drop a bit to around 110 - 120 psi and actually help the top end charge towards the traps of the drag strip.

Or you can install a common aluminum plug in place of the vacuum modualtor and then you must remove the boost valve and PR assembly for modifications to avoid SKY high pressures in reverse.

Let me know
__________________
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
  #6 (permalink)  
Old 03-08-2003, 05:27 PM
Where's my Sawzall?
 
Last wiki edit: Window removal and installation
Last journal entry: More progress...
Last photo:
Join Date: Jan 2003
Location: Chesterton, IN.
Age: 46
Posts: 194
Wiki Edits: 2

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Hey Tony, I'd be interested in seeing these mods myself. Been thinking of converting the TH-400 in the '28 toa full manual setup for the trail, once I get the '54 up and running for a driver...

My Email is drchop@hotmail.com or drchop@lycos.com and I usually check both eveery couple of days...

Thanks

Doc
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 03-23-2003, 01:07 PM
New Member
 
Join Date: Mar 2003
Location: U.K
Posts: 20
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Crosley,the instructions you gave me worked fine,I now have a full manual TH400,thanks. Is it possible to convert the TH350 trans. to full manual in a similar way,without a kit?
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 03-23-2003, 03:18 PM
Member
 
Join Date: Nov 2002
Location: Cocoa, Florida
Posts: 47
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Talking

Hey Crosley, could you also email me those mods. I would appreciate it. thanks
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 03-23-2003, 05:47 PM
Member
 
Join Date: Jan 2003
Location: Southern Ohio
Posts: 106
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Crosley, could you please post this info in the knowlege base for all, thanks.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 03-22-2005, 10:11 AM
Steve
 
Last photo:
Join Date: Feb 2005
Location: Illinois
Age: 52
Posts: 8
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Hi all, I am new here and found this old thread while searching.
Crosley is it possible to still get this information on converting a stock valve body to full manual?
I just installed a self built TH400 in my 98 TA. It shifts very nice but I would like to convert it to a forward manual valve body using the stock valve body for budget reasons.
Any information would be greatly appreciated.

Steve
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 03-22-2005, 07:07 PM
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: 7,977
Wiki Edits: 1659

Thanks: 257
Thanked 85 Times in 82 Posts
t*****************************


Quote:
Originally Posted by kihco
Hi all, I am new here and found this old thread while searching.
Crosley is it possible to still get this information on converting a stock valve body to full manual?
I just installed a self built TH400 in my 98 TA. It shifts very nice but I would like to convert it to a forward manual valve body using the stock valve body for budget reasons.
Any information would be greatly appreciated.

Steve
__________________
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; 01-07-2009 at 07:19 PM.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 03-23-2005, 07:06 AM
Steve
 
Last photo:
Join Date: Feb 2005
Location: Illinois
Age: 52
Posts: 8
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
That would be great!!
My e-mail is turned on but for some reason doesn't seem to be available on the forum right now. It is, Kihco@juno.com

As for current trans mods I have done the following,
It's a 71 trans with a CR code tag.
drilled 2nd and 3rd clutch feeds in the spacer plate to 3/16",
ground a flat on the 1-2 shift valve,
plugged bleed off hole in back of valve body with 3/16" set screw,
disabled the 2-3 accumulator by blocking feed with steel ball,
shimmed front servo return spring with 1/8" spacer in case,
3 check balls,
removed center lip seal from direct clutch piston,
removed 2nd seal ring from top on center support,
forward clutch springs in direct clutch pack,
.055" pack clearance on forward and direct,.075" on intermediate.
Alto reds and kolene steels,
stronger pressure reg spring.
34 element sprag.
I'm running a 4000 9.5" stall and this is a supercharged ls1 motor.
It shifts great. But I really don't need any auto function and also would like 2nd gear starts for burnouts.
Will doing the conversion give any increased holding power in 3rd over the auto setup?
Steve

Last edited by kihco; 03-23-2005 at 07:12 AM.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 03-24-2005, 06:52 PM
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: 7,977
Wiki Edits: 1659

Thanks: 257
Thanked 85 Times in 82 Posts
Did you plug the suggested hole in the separator plate or are you using an aftermarket plate. This is needed when the middle seal of the direct clutch piston is removed.

Instead of drilling a large hole for 2nd gear , leave the check ball out when a 34 elemet sprag is used.

Some separator plates have a small hole near the coasting band servo the fluid passes through for 3rd gear apply.... if it over looked the shift quality will suffer some.

I do not like kolene steels... simply a personal thing


Quote:
Originally Posted by kihco
That would be great!!
My e-mail is turned on but for some reason doesn't seem to be available on the forum right now. It is, Kihco@juno.com

As for current trans mods I have done the following,
It's a 71 trans with a CR code tag.
drilled 2nd and 3rd clutch feeds in the spacer plate to 3/16",
ground a flat on the 1-2 shift valve,
plugged bleed off hole in back of valve body with 3/16" set screw,
disabled the 2-3 accumulator by blocking feed with steel ball,
shimmed front servo return spring with 1/8" spacer in case,
3 check balls,
removed center lip seal from direct clutch piston,
removed 2nd seal ring from top on center support,
forward clutch springs in direct clutch pack,
.055" pack clearance on forward and direct,.075" on intermediate.
Alto reds and kolene steels,
stronger pressure reg spring.
34 element sprag.
I'm running a 4000 9.5" stall and this is a supercharged ls1 motor.
It shifts great. But I really don't need any auto function and also would like 2nd gear starts for burnouts.
Will doing the conversion give any increased holding power in 3rd over the auto setup?
Steve
__________________
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
  #14 (permalink)  
Old 03-25-2005, 08:42 AM
Steve
 
Last photo:
Join Date: Feb 2005
Location: Illinois
Age: 52
Posts: 8
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Did you plug the suggested hole in the separator plate or are you using an aftermarket plate. This is needed when the middle seal of the direct clutch piston is removed.

Instead of drilling a large hole for 2nd gear , leave the check ball out when a 34 elemet sprag is used.

Some separator plates have a small hole near the coasting band servo the fluid passes through for 3rd gear apply.... if it over looked the shift quality will suffer some.

I do not like kolene steels... simply a personal thing

yes I installed a cup plug in the reverse passage near the center support bolt and am using a stock separator plate.
I attached a pic of the check ball locations and of a spacer plate showing the holes I drilled. I am using a check ball in locations 1,5 and 6. Do you recommend I remove the one in location 5?

I am not sure what you mean about the other small hole in the spacer plate that you mention. Can you point out which hole in the spacer plate pic and how I should modify it?

I am no expert on transmissions. I am just trying to learn as much as I can, so I am curious why you do not like the Kolene steels?

Thanks a ton for your help Crosley!
Steve
Attached Thumbnails
Click image for larger version

Name:	checkball.jpg
Views:	1154
Size:	83.0 KB
ID:	4377   Click image for larger version

Name:	spacer plate.jpg
Views:	839
Size:	37.3 KB
ID:	4378  
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 03-25-2005, 12:31 PM
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: 7,977
Wiki Edits: 1659

Thanks: 257
Thanked 85 Times in 82 Posts
a cup plug in tyhe case takes care of the hole I was talking about.

#5 check ball in your photo is the 2nd gear one.
__________________
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

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: 5 (0 members and 5 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
Convert T-400 to a FULL manual valve body fordss Transmission - Rearend 5 04-28-2012 10:01 AM
Full Manual Turbo 400 Undo? leftyfork Transmission - Rearend 8 04-22-2011 05:54 PM
need a manual instruction for a fairbanks manual no tranbreak valve bodie th-400 betobotes Transmission - Rearend 1 09-20-2008 02:05 PM
making a full manual Big86inthestixx Transmission - Rearend 1 12-15-2003 07:18 PM
Full Manual Valve Body TH-400 Chezelle Transmission - Rearend 3 06-13-2003 06:47 PM


All times are GMT -6. The time now is 08:28 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.