Strange knocking in 1st gear - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 11-07-2002, 11:12 AM Thread Starter
 
Join Date: Jul 2002
Posts: 35
Thanks: 0
Thanked 0 Times in 0 Posts
 
Strange knocking in 1st gear

Good afternoon, all. Recently, I've noticed a knocking or tapping sound in my 81 CJ7 (304, T-176). It sounds sorta like spark knock or a valve tap, but heavier, if that makes sense. Also, the sound seems to come from lower in the engine & ONLY when starting off in 1st gear. I have bad 1st/2nd synchros in the tranny .. could this noise be related (or something else tranny related)? Thanks in advance for your thoughts.
ff0758 is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 11-07-2002, 05:57 PM
Old Hand
 
Skellator's Avatar
 
Join Date: Aug 2000
Location: Conowingo, Md.
Posts: 1,124
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Strange knocking in 1st gear

My brother bought an old Chevelle a few years ago that had a knock so he got it cheap.. He took it to his shop, put it on the lift and tightened the bell housing bolts (tranny slapping the block) and traded the Chevelle for a sweet Cuda. [img]images/graemlins/grin.gif[/img]
My Jeep has a knock when I take off but I found it today and didn't have time to mess with it but it's the exhaust hitting the skid plate. [img]images/graemlins/crazy.gif[/img]
You might have to enlist the help of a friend or relative to help you track it down, but hopefully it's something simple. [img]images/graemlins/smile.gif[/img]
Skellator is offline  
post #3 of (permalink) Old 11-07-2002, 06:35 PM
 
Join Date: Dec 1999
Posts: 5,140
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Strange knocking in 1st gear

might also check the engine mounts, a loose rubber coupler could allow it lift under load then drop, makeing a tap down low on engine.

ozarkjeep is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 11-08-2002, 12:03 AM
I Might Just Know What I'm Talking About
 
Join Date: Oct 2000
Location: C-ville, VA
Posts: 1,586
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Strange knocking in 1st gear

....or you could open it up like I did a few nights back and find bearing scraps in the oil pickup!!!! [img]images/graemlins/frown.gif[/img]

I had a tapping, but it was at the top end since my oil pressure was less than the atmosperic pressure!

Fritz
ExtinctJeep is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
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:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not 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

 
For the best viewing experience please update your browser to Google Chrome