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Tapered differential bearings to ball bearings - which shims to use?

Old 03-30-2009, 09:43 PM
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Default Tapered differential bearings to ball bearings - which shims to use?

I am putting a type r lsd with ball bearings into my GSR tranny which previously had a differential with tapered bearings in it. I know that I will need to check the clearance after I install the differential and and may need to adjust it using different shims. My question is, do I first start off with using all three of the shims that were being used with my original differential? The reason I ask is that my manual shows the differential for a B18B1 (which uses ball bearings) only having one shim where as my differential for my B18C1 (which used tapered bearings) had three shims. Also, I removed both of the races for the tapered bearings. Was this the correct thing to do? Thanks a lot!
Old 03-31-2009, 01:04 AM
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Default Re: Tapered differential bearings to ball bearings - which shims to use?

are you using 19.5 or 18.0mm wide bearings on each side?
Old 03-31-2009, 02:26 PM
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Default Re: Tapered differential bearings to ball bearings - which shims to use?

They are 18mm thick
Old 03-31-2009, 05:58 PM
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Default Re: Tapered differential bearings to ball bearings - which shims to use?

Get rid of it all and use just one 80mm shim in the appropriate thickness.
Old 03-31-2009, 06:02 PM
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Default Re: Tapered differential bearings to ball bearings - which shims to use?

I think I just found my answer in this thread - https://honda-tech.com/forums/acura-integra-6/tranny-overhaul-jdm-itr-final-drive-lsd-install-56k-not-so-much-795700/

This is a quote from IN VTEC's write up - "Since we switched to the enclosed ball bearings, we will no longer use a 79.5mm shim. Instead, we'll only be using a single 80mm diameter shim on the gear housing and no shims on the clutch housing side."
Old 03-31-2009, 06:02 PM
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Default Re: Tapered differential bearings to ball bearings - which shims to use?

Originally Posted by IN VTEC
Get rid of it all and use just one 80mm shim in the appropriate thickness.
ha ha, thanks
Old 03-31-2009, 09:31 PM
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Default Re: Tapered differential bearings to ball bearings - which shims to use?

nevermind

Last edited by TB123; 03-31-2009 at 09:55 PM. Reason: stupid question
Old 04-10-2009, 11:44 PM
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Default Re: Tapered differential bearings to ball bearings - which shims to use?

I checked the clearance and purchased the 1.95mm (V) shim, which is that thickest one that Honda sells. After installing the shim and replacing the casing, I checked the clearance again. I am still able to fit a .356mm feeler gauge between the bearing and the shim. The clearance is supposed to be within 0 and 0.1mm. Because I purchased the largest shim available, the only way that I can think of to get the clearance between 0-0.1mm would be to purchase two more shims which together would be about 2.3mm thick. Is it okay to use two shims together? Should I do this, or should I just leave it how it is and not worry about it? Thanks
Old 04-11-2009, 03:42 PM
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Default Re: Tapered differential bearings to ball bearings - which shims to use?

Need a spacer under the bearings, or switch to the thicker bearings.
Old 04-11-2009, 06:36 PM
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Default Re: Tapered differential bearings to ball bearings - which shims to use?

Originally Posted by Aquafina
Need a spacer under the bearings, or switch to the thicker bearings.
What other size bearings are there? 19.5mm? Those would be too thick. Are there supposed to be spacers between the bearings? There weren't any on there before. Would if cause any problems to use two shims together?
Old 04-12-2009, 10:33 PM
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Default Re: Tapered differential bearings to ball bearings - which shims to use?

GSR trannys that went from tapered bearings to normal setup used 19.5mm inner races.

yes, It was a headache, but no complaints yet.
Old 04-12-2009, 11:06 PM
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Default Re: Tapered differential bearings to ball bearings - which shims to use?

Originally Posted by Mista Bone
GSR trannys that went from tapered bearings to normal setup used 19.5mm inner races.

yes, It was a headache, but no complaints yet.
Are you saying that I should use 19.5mm bearings? I think that those would be too thick and I would have negative clearance.

I guess I am still confused as to whether or not I am doing this correctly. Right now, I have only one 80mm shim (1.95mm thick, the thickest one Honda makes) on the gear housing side. I am not using any other spacers or shims, and I have removed the races for the original bearings.

Even with the 1.95mm thick shim, I am still about 0.3mm away from being within the acceptable clearance. Is it okay for me to put two shims together?
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