PD-4104 Shift Linkage

[mung]

Should there be any bushings or anything like that on the shift arms at the transmission where the pin goes in for the linkage?  I looked at the parts book and don't see them listed, but there is a LOT of slop in that linkage.  One would think that you wouldn't want all of that movement in that linkage and the bus did have some issues with getting stuck in 2nd.

Thanks,
Vern

[eagle19952]

can you fit over sized pins ?

[mung]

I will have to check, but I would say yes; however, if there is supposed to be some kind of bushing there, then that probably helps with the slight rotation of the pins while dampening side to side and up and down movement. 

[gus]

I can't remember for sure about those arms, but all the other linkage arms have bushings and are very prone to wear.

I spent many hours replacing all mine plus the pins at the trans, but don't remember any bushings.

The parts book should show this, maybe in the common hardware section.

[chessie4905]

   Is the slop at the trans arm or at the rod tower at bulkhead center at rear of engine. You should remove the tower assy and replace/repair/rebuild it. The little arms on the tower have bearings in them. The tower transfers movement of rods in coach tunnel to rods to trans. Mark position of the rods so you don't mix them up. I don't know what parts are still available for that tower, but fix it once and be done with it. It also has a grease fitting at bottom. Fix it first and then grease it regularly. We put all new in our 4104 several years ago and eliminated all slop in the linkage.

[luvrbus]

If no grease zerk it won't have bushing

[mung]

I am talking about these linkage connectors.  See how much slop there is in the back one?  That can't help shifting at all.

[luvrbus]

The yokes look ok just drill the levers out to a standard size self lubing composite bushing or a blunting bearing and yokes are easy to find if wore out

[chessie4905]

   Is that just side to side slop or is the arm or yoke egg shaped? The side to side can be tightened up with appropriate sized washers.

[mung]

Don't look egg shaped, just look like at one time there was some kind of bushing in there that is no longer there.

[gus]

As I remember there are about six of those yokes and pins on each linkage, maybe more.

I replaced every one of those for clutch and shifter. Also the arms of the Al bellcrank on the firewall were severely worn, bushings were completely missing from some of them and they are very hard to find.

A little slop at each one of those results in a lot of slop at the trans/clutch end.

[mung]

I will have to see what I can find that will work in place of the bushings if I can't find the real ones.  There has to be something that will work.

[luvrbus]

All mill supply will have some type bushing any yoke is available from MSC Industrial Supply in NY so are the bell cranks I buy the composite self lubing with a flange on 1 end and drive it in with the flange side then use a 4 inch grinder to remove the flange if needed   

Composite bushing are easy to work with, easy to ream for a fit the self lubing is a plus then they last a long time just don't waste your time with nylon bushings from Ace Hardware BTDT     

[eagle19952]

http://www.graphalloy.com/html/type_317.html

[mung]

Thanks, now I just need to find the right size.