truck shaking in 4th gear? - 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> Engine
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 10-27-2010, 07:27 AM
Registered User
Join Date: Oct 2010
Location: colorado
Posts: 8
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
truck shaking in 4th gear?

Hello, I have a 78 400m when I shift into 4th gear the truck kinda shakes in the motor. especially underload. 1st and 2nd gear no problem but when I get into 3rd going into 4th the shaking starts. It only happens when I first go into the gear after that it smooths out. Kinda fells like when you shift into a gear to early then smooths out. Thanks for the help

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 10-27-2010, 05:10 PM
Registered User
Join Date: Feb 2010
Location: Lake Charles, LA.
Age: 38
Posts: 57
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
check your motor mounts and transmission tail mount at the cross member.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-27-2010, 05:16 PM
eloc431962's Avatar
Evil Wicked Mean And Nasty
Last wiki edit: Pilot bearing and bushings
Last journal entry: roof repair
Last photo:
Join Date: Nov 2008
Location: back in the garage.
Posts: 13,767
Wiki Edits: 37

Thanks: 50
Thanked 31 Times in 26 Posts
Could be the clutch/pressure plate also.

Reply With Quote Quick reply to this message

Recent Engine 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
T-400 Speedometer gear changes Torque454 Transmission - Rearend 2 08-09-2010 11:45 AM
truck "diesels" when i shut if off while in gear???? badk5 Engine 4 09-11-2005 12:48 AM
Towing in 3rd with a 4th gear lock up kit in 700r4 wed68 Transmission - Rearend 4 03-25-2005 12:34 PM
Truck 12 bolt gear ratios SAATR Transmission - Rearend 4 01-15-2004 11:52 AM
1978 chevy truck rear end gear ratio? gpeak Transmission - Rearend 2 11-25-2003 11:54 PM

All times are GMT -6. The time now is 11:28 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright 1999 - 2012. All Rights Reserved.