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tntatro

Need help with 8 speed transmission

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gwest_ca

If the bearing is an open style (a shaft would go through the bearing if the bearing was out) something you can try.

Find a solid shaft that will fit into the bearing with as little clearance as possible and expect the shaft to get damaged.

Half to 3/4 fill the bearing with grease.

Place gear/bearing assembly vertical on a solid surface.

Insert shaft in bearing.

Drive the shaft into the grease as hard as you can with a big hammer.

The hydraulic pressure created on the grease may force the bearing out.

If the bearing moves add more grease and repeat.

 

Garry

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stevasaurus

I destroy the bearing by getting the needles to come out...then take a small, sharp screw driver and hammer in between the race and shaft.  It will rip and then fall out.  The picture you have of that bearing looked fine, I would not have replaced it.  :think:

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tntatro
6 hours ago, stevasaurus said:

The picture you have of that bearing looked fine, I would not have replaced it.

I decided to replace all the bearings since there was one 1533 damaged and I could tell the difference after replacing it and comparing the new one with the other side. Most of the needle bearings that I removed seemed to be fine except maybe one or two sounded loose when I shook them.

The bearings in the gear pictured seem to be the least likely to fail because they ride about even with the rest of the shaft. I may leave them but I'm not sure about the damage to the gear. I counted 17 cogs and 11 of them were crushed a little. The damage is just in the area where third gear sits. A new one is $165 so I don't think I'll go that direction but I may be able to find one on ebay or I have another 8 speed that I can take apart and swap all the best gears to this one.

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stevasaurus

I would check with one of our vendors...like A-Z for that gear.  Check our vendor's list on the main page.  a good used gear like that is going for around $20 from one of our guys.  :)

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tntatro

I finally got my transmission together. I actually did two. One has new bearings and a new circular spring and the other I just put a limited slip and new seals.

I haven't had a chance to run the one with new bearings and spring yet but the other does have much better traction than the regular 8 pinion but it still doesn't want to climb this one steep trail on the property where a root sticks out into the path. One tire will spin on the root while the other looks like it wants to spin but doesn't. Is this because the circular spring is worn out or is it likely that I'm pushing it beyond its limit? I tried in 1st and 2nd and it wouldn't climb but it did go up if I used 3rd and got some speed. I didn't think to try the low gears.

 

The other transmission is on a mower at a different property so I can't drive up the same hill for comparison.

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pfrederi

It is a limited slip not a locking differential you may have a weak spring or it may be just too much.  In some circumstances my 10 pinions will s[pin one wheel...

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oliver2-44

Most auto supplies rent tools and they dhould have what you need to pull those needle bearings out, which is a slide hammer puller.  It comes with several different sizes of adjustable jaws which grab the bearing   Harbor Freight also sells a set that works 

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