727 Torque Flight trans 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 06-27-2006, 04:26 AM
Registered User
 
Last photo:
Join Date: Aug 2005
Location: Dandridge, TN
Posts: 77
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
727 Torque Flight trans problems

The other day after I got back from a short drive I pulled in the garage and put the trans in neutral and noticed that the car still wanted to move a little. Put the brake on and let the brake off and still wanted to move. Put her in park and it stopped moving. Ok heres the real kicker, I got in it yesterday and fired her up, let it warm up with the trans in neutral, put in reverse backed out of the garage, put in drive and she barely moved, major slipping, also in 2nd and 1st! Reverse is fine, but in drive, 2nd, and 1st she barely moves even when reving it up to about 1800-2000. I don't even have 50 miles on the trans since the rebuild. The trans was rebuilt and a Trans-go shift improver kit was also put in. I have a J&W 3400 stall converter. I also have a Gear Vendors overdrive unit on the car. One more thing, when I drove it this past weekend I kinda got on it a little bit and done about a 10 foot burnout and noticed something strange after I let up it didn't want to shift out of first until I lifted all the way out of the throttle then she shifted up the 2nd then drive. Trans fluid level is full. Any suggestions?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-28-2006, 11:18 PM
carnuck's Avatar
Member
 
Last photo:
Join Date: Dec 2003
Location: Seattle, WA
Age: 55
Posts: 31
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Sounds like the sprague wasn't holding good enough and first/reverse clutches fried together. I see a lot of that with '80 up Jeeps, which is why I manually shift to first gear. Other possibility is the band may have fried enough to not be gripping now.
Oooh! Just ahd a REAL bad thought! Someone may have installed the Sprague backwards so first gear wasn't getting any help from it. Most of the time when first/reverse clutches jam, reverse is what gets weak!
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-29-2006, 06:06 PM
scrot's Avatar
Registered User
 
Last photo:
Join Date: Apr 2006
Location: In front computer
Posts: 449
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
The overunning clutch is pinned in the case and is never removed unless it is damaged. Therefore it should not be backwards.
Other possibilities:
  • Overdrive unit is toast.
  • cross leak in valve body
  • valve body modifications [holes] sloppy
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-29-2006, 09:57 PM
carnuck's Avatar
Member
 
Last photo:
Join Date: Dec 2003
Location: Seattle, WA
Age: 55
Posts: 31
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
There is no overdrive in a 727, but the over running clutch, aka one way sprague has been removed and installed incorrectly by several shops in the past (usually when they bang the case and knock everything out but don't know which way it goes!) Messed up valve body is possible, but I just recalled another wild one. I had a Dodge van that went forwards just fine (drove it that way a long time) but in reverse it felt like the brakes were locked on.
Turned out to be the bearing in the tailstock had lost it's cage, which slid down over the rollers and locked it from rolling
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-29-2006, 10:49 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: 8,082
Wiki Edits: 1659

Thanks: 328
Thanked 99 Times in 95 Posts
fairly simple deal.....

the forward clutch pack has problems.

Since it backs up fine ( reverse) that indicates the direct clutch and rear band are working (hold power)... pump pressure is OK to operate the trans at this point.

In manual 1 gear selection on the shifter....... that over rides the rear roller clutch (sprag). So , if the sprag is in back wards or left completely out... the vehicle should move forward in manual 1 gear IF the forward clutch is working correctly, because the rear band will be applied in manual 1 gear position on the shifter.

If the vehicle wants to move forward in neutral or acts like it is in gear while in 'park' , the forward clutch may have welded/stuck it's self together for some reason.

__________________
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 06-30-2006, 04:11 AM
Registered User
 
Last photo:
Join Date: Aug 2005
Location: Dandridge, TN
Posts: 77
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Crosley....you hit the nail on the head. The fwd clutch pack is toast. I will be dropping the trans off today at a Mopar performance shop to let them go through it again.
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
dipstick problems with 350 trans merowe Transmission - Rearend 5 08-15-2006 03:42 PM
Trans Bolt On Problems martins69 Engine 4 11-19-2003 11:13 PM
727 reverse shift/tremor problems Gen3_with_455 Transmission - Rearend 1 11-09-2003 12:47 AM
Fine Metal in Trans (NEW) bigjoedo Transmission - Rearend 1 08-09-2003 01:23 PM
77 chevy malibu classic trans. problems crustytheclown87 Transmission - Rearend 1 08-13-2002 05:56 AM


All times are GMT -6. The time now is 10:55 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.