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Old 06-13-2018, 11:54 AM   #1
chronicrhythm
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Default M46 bearing identification help

I have an m46 that when I bought it, it didn't have a bellhousing on it and it was missing the bearing that sat behind the bellhousing. It is the one that sits below the main input shaft. Looking on rockauto it looks like the countershaft bearing is what I need but I haven't been able to find anything online about it and my haynes manuals don't mention the countershaft bearing from what I've read. The bearing sits on the circle cutout of the right bellhousing in the picture. There is also a rear and center countershaft bearing. Would the one I need be the center?

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Old 06-13-2018, 01:13 PM   #2
hiperfauto
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Set 4 (A4) is the one you want.

Make sure you put the shim for the input shaft bearing back in.
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Old 06-13-2018, 01:38 PM   #3
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There is no more than two bearings supporting the countershaft in an M45/M46. If its not an early type, both front and rear countershaft bearings are standard size 44649-610 ones. Dont forget to properly setup the clearances/preload down there, it differs between the iron and alu housings.
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Old 06-13-2018, 10:26 PM   #4
chronicrhythm
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Quote:
Originally Posted by hiperfauto View Post
Set 4 (A4) is the one you want.

Make sure you put the shim for the input shaft bearing back in.
Is there any where to get the shims? I don’t think it was there since the bell housing wasn’t on the transmission. I was reading about shimming in the Haynes guide. There is a local Volvo shop to me that I could probably check to see if he has them. And the National A4 is the one I want for the bearing?

Last edited by chronicrhythm; 06-13-2018 at 10:33 PM..
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Old 06-13-2018, 11:03 PM   #5
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I like Timken and I believe that's what they came with but either will work.

You need to measure the depth of the recess in the bell housing and the amount the bearing protrudes from the case. Add the gasket thickness to the depth of the recess, then subtract bearing protrusion to determine the shim needed. All 4 shims sizes are still available from the dealer.

.6 mm = 948008
.75 mm = 948009
.9 mm = 948010
1.0 mm = 948011

Last edited by hiperfauto; 06-13-2018 at 11:14 PM..
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Old 06-14-2018, 12:08 AM   #6
chronicrhythm
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Quote:
Originally Posted by hiperfauto View Post
I like Timken and I believe that's what they came with but either will work.

You need to measure the depth of the recess in the bell housing and the amount the bearing protrudes from the case. Add the gasket thickness to the depth of the recess, then subtract bearing protrusion to determine the shim needed. All 4 shims sizes are still available from the dealer.

.6 mm = 948008
.75 mm = 948009
.9 mm = 948010
1.0 mm = 948011
Awesome info! Thanks so much
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Old 06-14-2018, 12:30 AM   #7
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Do you have the correct front gasket? I had to wait months to get the front gasket for an early M45/M46 from Volvo, the only source for them, later M45/M46 use a different gasket.

And I have both in stock in case Volvo is on back order again or if you don't want to make your own gasket.
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Old 06-14-2018, 01:34 AM   #8
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Whoops, SKF is the original bearing manufacturer, not Timken.
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Old 06-14-2018, 10:20 PM   #9
chronicrhythm
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Quote:
Originally Posted by planetman View Post
Do you have the correct front gasket? I had to wait months to get the front gasket for an early M45/M46 from Volvo, the only source for them, later M45/M46 use a different gasket.

And I have both in stock in case Volvo is on back order again or if you don't want to make your own gasket.
I am going to try the gasket kit from eeuroparts. Actually looking at the vehicle fitment guide it says it isn't for a 240 so maybe the bellhousing gasket won't be correct and I'll have to contact you. I guess I could call them and see what the thickness is. Do you know off hand how thick it should be?
https://www.eeuroparts.com/Parts/406...-M46-41431574/
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Old 06-15-2018, 12:22 AM   #10
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Before you buy that set, make sure you have the later M46.

You can tell by the splines on the input shaft, coarse, 10 splines or fine, 22 splines
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