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69 AMX Trunnion Question |
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javsst
AMC Nut Joined: Jul/02/2007 Location: Lebanon, NJ Status: Offline Points: 435 |
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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 |
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5919 |
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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.
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javsst
AMC Nut Joined: Jul/02/2007 Location: Lebanon, NJ Status: Offline Points: 435 |
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So, it may be a good idea to take apart the upper trunnion and king pin apart to check the thrust bearing?
Thanks! Steve |
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5919 |
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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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javsst
AMC Nut Joined: Jul/02/2007 Location: Lebanon, NJ Status: Offline Points: 435 |
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Probably a real good idea, check for scoring and bearing wear.
Thanks again! Steve |
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19676 |
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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!! Edited by farna - Dec/17/2007 at 11:28am |
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Frank Swygert
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