Turbo 400 help? Klunking - 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
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 05-31-2007, 07:22 AM
daveh's Avatar
Last photo:
Join Date: Jun 2003
Location: Florida
Posts: 396
Wiki Edits: 0

Thanks: 1
Thanked 3 Times in 3 Posts
Turbo 400 help? Klunking

Hey guys,

About a year ago I purchased a 70 Monte Carlo it needs to be restored but still runs. It is a 350 auto car with a turbo 400 and a 12 bolt. The engine runs great it just when I go to put it in gear it will "klunk" it will "klunk" really hard when I put it in reverse. Can anyone point me into the right direction as to why it does this? What do you think it is?

Thanks Dave


Last edited by daveh; 05-31-2007 at 08:38 AM.
Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 05-31-2007, 10:53 AM
gator412's Avatar
1955 2nd series Chevy Pick Up

Last journal entry: Body work and U bolts
Last photo:
Join Date: Feb 2005
Location: Santa Maria, Taxifornia
Age: 57
Posts: 282
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Sounds like bad u-joints to me.....buts lets see what the experts have to say.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-31-2007, 02:16 PM
STRKD89FB's Avatar
408 Stroker
Last photo:
Join Date: Apr 2006
Location: KC Kansas
Age: 47
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
U-joints are the first thing that come to mind for me also.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-01-2007, 07:31 AM
Registered User
Join Date: Jul 2006
Location: Missouri
Posts: 20
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
When I first got my '55, it did the same thing. I replaced u-joints, then tail shaft bushing, then finally rebuilt the rear end. Still had clunking! Turns out it was wore out (gone!) leaf spring bushings. Just an idea, you might look at before you go through all the steps I did.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-03-2007, 11:10 PM
Last photo:
Join Date: May 2003
Location: Shreveport LA
Age: 67
Posts: 5,106
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
I've seen a few cars from that period that had a lot of drive train slack, even when brand new. The Chevy dealer told me mine was "perfectly normal". I figured it was BS, but it lasted a long time and never made any noise, other than the clunk.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-04-2007, 01:07 PM
Augusto's Avatar
From the middle of the world
Last wiki edit: How to rebuild an engine Last photo:
Join Date: Mar 2006
Location: Ecuador, South America
Age: 54
Posts: 1,363
Wiki Edits: 6

Thanks: 5
Thanked 6 Times in 6 Posts
TH400's have a locating dovel under the valve body, if it is worn it will clunk hard, you should have your tranny serviced inmediatelly.

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
Turbo vs Supercharger - Write up!! FastChevyTruck Engine 107 02-16-2011 12:18 PM
Turbo 400 help, Need to know what I did wrong MAD BOWTIE Transmission - Rearend 8 12-28-2005 08:39 AM
Turbo 400 yoke question...? Bumpstick Transmission - Rearend 8 12-25-2005 02:41 PM
turbo 400 with transfer case to 700-r4 razzle Transmission - Rearend 3 11-04-2002 06:12 PM
7ooR4 vs 400 turbo? WBhunter Hotrodders' Lounge 4 04-25-2002 01:54 PM

All times are GMT -6. The time now is 08:42 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 Hotrodders.com 1999 - 2012. All Rights Reserved.