Tripod Bearing popping out - I'm stumped! - Saab 900 Bulletin Board - Saabnet.com
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Tripod Bearing popping out - I'm stumped!
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Posted by SaabRobAz [Email] (more from SaabRobAz) on Mon, 9 Jan 2023 20:48:17 Share Post by Email
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Fellow SAABers,
I just rebuilt my 1989 SPG engine with some great mods for speed and efficiency - a build that was 9 years in the making, and the engine is a thing of beauty, purrs like a kitten mostly, with only a few hours on the clock.

The real issue here is that I first ordered a "trackmotive" aftermarket front axle set, and the drivers side bearing popped out even before I could get on the main drive coming out of my neighbourhoud. It appears that with the driver's side axle in and with all the other components of the hubs installed and tightened, there is a bit more than 5/8 inch amount of movement of the end of the axle in and out of the hub! and.. With the axle nut tightened, the tripod bearing is only about 1/2 way into the cup from the edge (!) whilst looking uderneath. Obviously it is too short. But how? The passenger side appears to go in and has resonable amount of movement, but is fully seated in the middle of the race surface in the driver cup.

I ordered a new set of remanned axles, and they are both a little bit longer, but still the driver's side is looking the same - about to pop out - tripod bearing only half-way in. I was able to save the the inner driver cup and only minior damage was done last time, but if this happens again, i'm sure I'll have to replace it.

Anyhow, the rebuilt engine was placed atop a rebuilt trans that I had successfully used for maybe 2k miles in my old '87 SPG, so I assume different hubs there compared to my '89, but both were of the vented brake disc variety.

At this point, I am losing my mind and am not sure what is going on. Everything else lines up perfectly in the engine bay, and the driver cups look good too as far as alignment in the engine-bay, but the drivers side axle shaft appears to be too short! I feel like such a noob even after building such a great sounding engine. I still have the olds shafts and the old engine/trans in my shop and the drivers side axles match up in length between old and new with the remanned axles.

HELP is very much appreciated folks!
Where do I start?

Rob
-and-
Ashe: Edwardian Gray 1989 SPG @280k

posted by 64.98.23...

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