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69 AMX Trunnion Question

Printed From: TheAMCForum.com
Category: The Garage
Forum Name: Suspension, Steering, Brakes & Wheels
Forum Description: What makes it stop, turn, and smooths the ride
URL: https://theamcforum.com/forum/forum_posts.asp?TID=2176
Printed Date: Mar/28/2024 at 7:13am
Software Version: Web Wiz Forums 12.03 - http://www.webwizforums.com


Topic: 69 AMX Trunnion Question
Posted By: javsst
Subject: 69 AMX Trunnion Question
Date Posted: Dec/16/2007 at 1:51am
I've torn down the front suspension on the AMX to replace a number of the dry rotted bushings as well as clean up and paint.

Once question that I have is regarding the trunnions.  How do I tell if I need to disassemble the upper and lower halfs? (Upper trunnion and lower knuckle/shaft).   The car had about 70,000 miles on it.  There doesn't seem to be any up and down or lateral movement in the parts, and the rotation seems to be smooth.

Thanks!

Steve



Replies:
Posted By: PHAT69AMX
Date Posted: Dec/16/2007 at 11:02am
Understanding is if the trunnion is not sloppy on the king pin you should be good to go.
And as long as the thurst bearing under the trunnion on the king pin is good also.
 
Cool


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Link to a http://www.youtube.com/watch?v=MySiKQsmWxU" rel="nofollow - Short YouTube Burnout Video



Posted By: javsst
Date Posted: Dec/16/2007 at 2:27pm
So, it may be a good idea to take apart the upper trunnion and king pin apart to check the thrust bearing?

Thanks!

Steve


Posted By: PHAT69AMX
Date Posted: Dec/16/2007 at 2:36pm
Trunion Thrust bearing is below, seperate, and visible while assembled I believe.
May want to disassemble and inspect internal features, bore, king pin, etc.


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Link to a http://www.youtube.com/watch?v=MySiKQsmWxU" rel="nofollow - Short YouTube Burnout Video



Posted By: javsst
Date Posted: Dec/16/2007 at 10:56pm
Probably a real good idea, check for scoring and bearing wear.

Thanks again!

Steve


Posted By: farna
Date Posted: Dec/17/2007 at 11:28am
I'd disassemble and clean it, and add a little grease when reassembling. The big "rubber" bushing in the top turns inside the housing (it's supposed to!), and was intended to be replaced when worn, never greased. It also wasn't intended to last almost 40 years. A light coat of lithium (or other synthetic grease) shouldn't hurt it a bit. Many people drill and tap them for a grease fitting, another good idea while you have it off. With the new grease it should last a lot longer, at least with "normal" driving. If you intend to autocross or road race a bit I'd go ahead and get the urethane bushings to replace the originals and install a grease fitting.

That said, I've only messed with a couple of that type trunnion on 64-69 Americans, and it's been a while. Others here used to dealing with early Javelins and AMXs know a good deal more than I! Now ask me about the early type trunnions in the big cars and 58-63 Americans... I know them all to well!!


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Frank Swygert



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