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What are the differences between IPB 9231 and 9135?
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What are the differences between IPB 9231 and 9135?
I was looking at a couple of old inner primary bearings that I had sitting on a workbench. One of them is a 9231 and the other is a 9135.
I know the following:
9231 For 6-Speed transmissions (in general, there are exceptions)
9135 For 5-Speed transmissions
Looking at the two bearings, they appear to be the same size both ID and OD and have the same number of rollers (13).
I see the construction of them is a bit different but are there any other differences?
From a pricing point of view, the 9231 is almost 1/2 the price of the 9135.
Could one use a 9231 in a 5-Speed?
There is an oil groove cut into the outer race of the 9231 bearing. Otherwise, dimensionally the same. I assume the oil groove coincides with the oiling hole in the primary case that was added.
There is an oil groove cut into the outer race of the 9231 bearing. Otherwise, dimensionally the same. I assume the oil groove coincides with the oiling hole in the primary case that was added.
Are you referring to the groove that's visible on the outside of the bearing in the picture or do I need to take the bearing apart to see this groove?
If it's the groove on the outside of the bearing, what is that oil groove actually doing? I don't think oil can get into the bearing from that groove.
Attached updated picture with bearing part numbers
Originally Posted by RANGER73
The one on the left looks like the bearings protrude farther, What this MIGHT permit is better oil circulation between the bearings.
I should have labeled the bearings in the picture I attached. The bearing on the left is the 9135, the bearing on the right is the 9231.
Still not seeing any oil groove on the 9231 bearing.
Last edited by LQQK_OUT; Mar 18, 2019 at 11:16 AM.
Reason: Attached updated picture with bearing part numbers
first, BT's are not my forte'.
i will throw this out and see if it sticks.
the 5sp case was pretty much open, seal, snap ring, bearing, snap ring. the lubrication was mainly wash from primary oil running down the inner cover. the bearing needed to be open to max out lubrication.
the 6sp case is diff as it was seal, snap ring, bearing and inner cover (as back stop). since the case impeded oil wash, they added an oiler hole to the case. now this posed a problem so the newer bearing uses a shield as an oil retainer. this was important to retain oil pool regardless of driving conditions that effect oil wash, stands to reason, less speed = less wash.
could you use either, hummm, well i would stick to the design.
I do see what you are pointing to, but I'm not sure that is an oil groove. Looking at it through a magnifying glass, I don't see how any oil would get into the bearing through that groove. I think that groove is there due to the way the bearing is manufactured, and the ring is just pressed into the bearing keeping the caged rollers in place and the groove is just the outside of the pressed in ring.
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What are the differences between IPB 9231 and 9135?
