Lower trunion sleeves

[Andy69]

Making some repairs to the lower frame, I have the opportunity to replace the trunnion sleeves.  Originals aren’t bad but are 30 years old.  They are steel, 11/16 OD 5/8 ID and 1 1/4” length.  Closest I can find are either 5/8 or 3/4 OD.  Any issues using either one or would I be better off just using the originals?

[jbcollier]

What are you calling trunnion sleeves?  These?

 

They are wear items.  Change if there is play.  Care fully check the trunnions for play when mounted onto the uprights.

[IamScotticus]

@Andy69 which oil will you be using for the trunnions?

[Andy69]

7 hours ago, jbcollier said:

What are you calling trunnion sleeves?  These?

 

They are wear items.  Change if there is play.  Care fully check the trunnions for play when mounted onto the uprights.

Thats what I’ve been calling them, maybe it’s not the right term in this context.  I’m talking about the mounting sleeves for the lower wishbones.  They are brazed in place, and while they still seem fine as far as play, they are worn slightly oblong, like just barely noticeable to the eye.  I haven’t measured it exactly.  I don’t know if there is a spec for what’s acceptable wear.  This is on a 1992 Supersprint

 

Originals are 1/2” ID, 11/16 OD and 1 1/4” long.  I can only find 5/8 and  3/4 OD in steel.  Im afraid the smaller won’t be strong enough and the latter would weaken the 1” tube frame at that point by reducing the material in the tube.  I could use bronze but that might wear faster, plus I have zero experience working with bronze.

 

 

 

[jbcollier]

Can you post a photo?  Or reference an online photo?  Just want to make sure I understand exactly which part you are referencing.

[jbcollier]

Here's a typical chassis:

 

 

The lower arm mounts onto a pin at the front and the rear bush is bolted to a chassis member.  What part are you referring to?

[Andy69]

The sleeve that’s inside the frame upright.

 

The originals are 1/2” ID and 11/16” OD.  I can only find  steel sleeves that are either 5/8” or 3/4” OD. I can reuse the old ones but I’d like to replace if I can given the inside is slightly oblong due to wear.  
 

Edit: I just discovered that the inside bushing sleeves in the wishbones are exactly the same, and since I’m upgrading to a wide track kit I’ll be able to use one from the old lowers.

[jbcollier]

The only way those sleeves can wear is if the suspension arm bolt and nut are loose.

[MV8]

The sleeve should be sticking out from the frame when tight. You need enough washer/shim or longer sleeves. I'd use a washer the same id as the sleeve and not worry about a little wear to the sleeve end from being loose.

Edited Friday at 07:12 PM by MV8