Bearings for Trans

[SHOkid13]

I finally got my trans apart, and I have a few things I want to run over...

Everything looks great except for a few small things:

5th synchro and gear are showing a fair amount of wear, while the blocking ring is almost untouched. Weird… Has anyone seen that before? You can view the pictures here: http://home.earthlink.net/~shokid13/id11.html (Can't figure out how to post pics here yet...) The inside of the blocking ring is perfect, no wear at all. When I put the gear on the blocking ring and the synchro, the gear spins freely... Is that normal? All of the other gears lock up under their own weight.

I want to replace the input shaft bearings due to some minor wear patterns. Based on what I have read, these are hard to get. So, I did a little searching around and found some that seem to be the same thing. I found the front bearing/race (LM67048/LM67010) for $5.95/$3.55. Also, for the rear bearing/race (LM48548/LM48510) for $4.95/$2.75. Maybe I am missing something here… if so, please let me know. I found these at: www.etrailer.com. Just use the search function on the left hand side to find the bearings. Both seem to be a fairly common bearing in wheel hubs...

Like I said, everything else is perfect, so I guess I got a good one!

Thanks for your help!

Matt

 

[SHOkid13]

One other comment: The shim for the input shaft has a step in it about .002" deep from where the bearing race sits. Is that too much wear to hold the bearings with enough pre-load?

And, is anyone able to answer on my previous post? I am in a bind here, my trans is apart and waiting to go back together...

Thanks!

 

[TYSHO]

5th gear spinning freely = normal

All other gears should do the same, too. To test this simply hold one of the synchros, 1/2 or 3/4, in place, then spin any gear on that shaft. If it doesn't, your input shaft splines can be worn and the gear is stuck. If the gear is taken off, the synchro will be a PITA to take off and/or put on. This problem is caused by the tranny being ran without fluid...even a short period of time can cause this as I experienced it in a blown diff trans.

The synchro/gear issue is hard to tell without close examining. To find out if the blocking ring has wear on the teeth, take it off and flip it over. Feel the bottom side, under the teeth, which is facing the actual gear when installed, and see if it has a ridge on the back side from the synchro wearing down the brass. Like an icecicle hanging from a roof. If not, the ring is fairly new and someone has replaced it.

 

[SHOkid13]

5th gear spinning freely = normal

All other gears should do the same, too. To test this simply hold one of the synchros, 1/2 or 3/4, in place, then spin any gear on that shaft. If it doesn't, your input shaft splines can be worn and the gear is stuck. If the gear is taken off, the synchro will be a PITA to take off and/or put on. This problem is caused by the tranny being ran without fluid...even a short period of time can cause this as I experienced it in a blown diff trans.

I guess I didn't explain it correctly... Let me try again: If I hold the 5th blocking ring in my hand, then mate 5th gear and the blocking ring (not attached to the shaft), and try to spin the gear, it spins freely. All of the other gears won't spin on the blocking rings, only 5th. I think it is due to the material on the inside of the blocking rings but, not sure if that makes sense for it to spin easily... doesn't seem like it would be serving it's purpose. Even if I put a lot of pressure on the gear and blocking ring, they spin like a bearing.

The synchro/gear issue is hard to tell without close examining. To find out if the blocking ring has wear on the teeth, take it off and flip it over. Feel the bottom side, under the teeth, which is facing the actual gear when installed, and see if it has a ridge on the back side from the synchro wearing down the brass. Like an icecicle hanging from a roof. If not, the ring is fairly new and someone has replaced it.

The blocking ring does have some wear on the back side, like you described. But, I was expecting to see some wear on the top side of the blocking ring, rather than wearing the synchro and gear which is showed in the pics on my site. I've got the kit from Josh with all blocking rings, etc included, so I'll have new ones.

Anyone have any input on the bearings??

Thanks,

Matt

 

[TYSHO]

I guess I didn't explain it correctly... Let me try again: If I hold the 5th blocking ring in my hand, then mate 5th gear and the blocking ring (not attached to the shaft), and try to spin the gear, it spins freely. All of the other gears won't spin on the blocking rings, only 5th. I think it is due to the material on the inside of the blocking rings but, not sure if that makes sense for it to spin easily... doesn't seem like it would be serving it's purpose. Even if I put a lot of pressure on the gear and blocking ring, they spin like a bearing.

When everything is assembled, the blocking ring will not spin freely with the actual gear. The 3 insert hubs, held in place by spring clips, or whatever, in the syncho assembly will hold the blocking ring in place, as it has 3 grooves for each hub to fit in.

If you have not actually removed the gears, 1-4, than that would be why it doesn't spin with the gear.

The blocking rings, for gears 1-4, have fiber lining, as 5th has brass. In 89, and maybe 90, all of the blocking rings were brass only, like 5th gear in all SHO's.

Edit: IIRC, when you buy new bearings they should come with the shim(s).

 

[SHOkid13]

When everything is assembled, the blocking ring will not spin freely with the actual gear. The 3 insert hubs, held in place by spring clips, or whatever, in the syncho assembly will hold the blocking ring in place, as it has 3 grooves for each hub to fit in.

If you have not actually removed the gears, 1-4, than that would be why it doesn't spin with the gear.

All of the gears are removed, and the blocking ring isn't spinning on the synchro, the gear spins freely on the blocking ring. In contrast, all other gears and blocking rings don't spin freely between themselves... Anywho...

What I am trying to find out about the bearings is if the bearings listed above are useable, or are they alltogether different?

 

[TYSHO]

I don't know, but it'd be great to find another source for bearings. There's bound to be indentical ones out there than the specified ones.

Anyhow...put fluid between the ring and gear and it should spin. If not, it will anyways when it's assembled. Nothing to worry about.

 

[SHOkid13]

I don't know, but it'd be great to find another source for bearings. There's bound to be indentical ones out there than the specified ones.

Anyhow...put fluid between the ring and gear and it should spin. If not, it will anyways when it's assembled. Nothing to worry about.

Thanks for the help!

 

[SHOkid13]

Getting desperate!...

I need to know if the bearings specified in my first post will work. If anyone has any reference numbers that can cross over, or any other information, I'd appreciate it... as would several other owners who need bearings.

Thanks!

Matt

 

[TYSHO]

If you can't get any help, I'd try contacting Bizzy(Beth) and see if she has the bearings that you'll need. Then you'd know you have parts coming in that will work and don't have to wait anymore. Or, maybe she can help you out on the answer. Sorry that I can't help you on this part, but as long as the measurements are the same as OEM, I'd think they'd work.