Transgo th350 1&2 Reprograming Kit - Hot Rod Forum : Hotrodders Bulletin Board -- 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
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 11-11-2010, 11:12 AM
Registered User
Last photo:
Join Date: May 2010
Location: Victorville CA
Posts: 40
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Transgo th350 1&2 Reprograming Kit

I'm planing to install this kit in the next couple of days and wanted to if anyone has any advice or opinions before I start.The instructions that came with kit is only a single piece of paper but I have watched the video from the transgo website and is seems to be pretty straight forward.The written instructions mentions a couple of things the video didn't cover,the gold spring on the modulator valve and the different springs used on the governor for customizing shifts.I thought I could use an adjustable modulator valve to make shifts earlier or later.Also maybe nothing the picture on the printed page shows the new spring in the detent lever going one way with the coiled end over the support plate and video shows it installed the opposite way.I have the trans out of the car which is 1970 El Camino with a 383,this just a street car the probably new see track.Thanks in advance for your thoughts.

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 11-11-2010, 11:28 AM
6426yy's Avatar
Last photo:
Join Date: Nov 2003
Location: Macomb Il.
Age: 37
Posts: 618
Wiki Edits: 0

Thanks: 4
Thanked 6 Times in 6 Posts
Are you rebuilding the trans? It would be wise to install a hardened intermediate race and new sprags IMO. TransGo makes a good kit the govorner springs and weights are for your full throttle shifts, modulator adjustments are for cruising shifts. Just some pointers, make sure your work area is clean and scrub the hell outta the valve body, rinse it with brakes parts cleaner air(compressor?) dry and your good 2 go. I installed my detent spring like the paper shows IDK if it makes any differance.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-11-2010, 12:41 PM
Registered User
Last photo:
Join Date: May 2010
Location: Victorville CA
Posts: 40
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the info.Yes Im rebuilding the trans and I bought a new heavy duty sprag and race.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-13-2010, 05:43 AM
Crosley's Avatar
Global Moderator
Last wiki edit: T-350 rebuild tech
Last journal entry: 1962 Morris Minor 1000
Last photo:
Join Date: Nov 2002
Location: ... USA
Posts: 9,280
Wiki Edits: 1659

Thanks: 965
Thanked 302 Times in 266 Posts
I would suggest you not change the governor springs or add the spring on the modulator valve till you test drive.

The modulator spring will make shifts earlier - softer

Stiffer springs in the governor make shifts earlier and the springs have more effect on light to mid range throttle application.

The adjustable vacuum modulator will alter the shift points under light throttle , generally about 5 - 8 mph. This is dependent on your engine - gear ratio setup. More cam = less vacuum = later shifts usually
Dont worry how old you are... it is the mileage on your body that adds up.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 11-13-2010, 05:31 PM
spinn's Avatar
Registered User

Last journal entry: This makes a huge difference
Last photo:
Join Date: Oct 2004
Location: here
Posts: 2,553
Wiki Edits: 0

Thanks: 14
Thanked 88 Times in 85 Posts
The $40 goverbor kit from TCi works great for shift points. Personally, no shift kits. Similar firmness can be aquired with an adjustable modulator.

Some results to get you closer to where you want to be.

he governor's springs and weights are what sets the in drive shift points. B&M has a kit #20248 for $37 to recal it for any rpm you want.

B&M governor calibration kit for WOT.....THIS IS JUST AN APPROXIMATION!!
GM#24202127 = 4400 rpm
Blue&Yellow 2 & 3 = 4900 rpm C10 tried good torque jump to 2nd at 4300
GM#24202117 = 5000 rpm
Blue & Yellow 4 & 3 = 5100 rpm
GM#24202122 = 5200 rpm
Blue & Yellow 2 & 5 = 5300 rpm C10 tried revs out till done at 4700
Blue & Yellow 5 & 3 = 5500 rpm
Blue & Green 4 & 5 = 5600 rpm
Blue & Green 3 & 5 = 5600 to 5700 rpm

Also If you have a lockup transission unit. Use a window switch to manually lockup converter 300rpm bfeore the end of each gear. This is where the engine is at peak hp, and locking TCC lowers the climbing rpm, holding very close ratio to the previous gear. Turns a wide 3 speed into a very limited use semi - 6 gear automatic.
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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
homemade T-350 shift kit th350mark Transmission - Rearend 17 07-28-2003 10:02 AM
Transgo re-program kit or tips & tricks Torque Monster Transmission - Rearend 2 02-19-2003 01:13 PM
TH350 B&M Shift Kit bizkit075 Transmission - Rearend 0 02-01-2003 10:34 PM
transgo shift kit swoodard23 Transmission - Rearend 1 01-18-2003 08:22 PM
TH350 shift kit mustang66maniac Transmission - Rearend 1 11-15-2002 11:19 AM

All times are GMT -6. The time now is 04:14 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.