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Old 04-16-2017, 08:52 AM   #1
bugjam1999
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Default Calling Captain bondo - m90 gearbox mount

Hi - I'm working towards an m90 swap, one of the last pieces of the puzzle is the gearbox mount. I've seen two styles in pictures, a 940 gearbox mount welded into the top of an m47 gearbox crossmember and the so called captain bondo style mount which bolts onto the m47 gearbox cross member without modifying it.

Is the captain bondo style mount available to buy? Or if not are the specs/measurements of it available?

Thanks
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Old 04-16-2017, 10:40 AM   #2
Wagner
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Hello.

Where in the world are you?
Can you weld regular steel?
Are you at all interested in a do-it-yourself -solution, if the parts were pre-made?







It would not be free, but it would not be expensive either. Postage might be though.
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Old 04-16-2017, 10:41 AM   #3
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^^ That is really cool.

Last edited by Tfrasca; 04-17-2017 at 10:21 AM..
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Old 04-16-2017, 10:49 AM   #4
bugjam1999
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That is very cool and I'd be very interested.

I'm in the U.K., but my girlfriend is visiting her parents in Chicago from the 26th to the 30th of this month and I'm sure she'd just love to bring something volvo related back with her. Alternatively flat rate ups boxes aren't that bad.

Do you have those kits ready to go?

Cheers
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Old 04-16-2017, 11:52 AM   #5
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I'm in Europe as well. I'll send you a PM when i get home.
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Old 04-17-2017, 05:15 AM   #6
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Assuming this is for a 240, there are three ways I’ve seen this done:

1) Use the M90 bracket and rubber mount with the 240 cross-member modified to take the rubber mount. This is not the best solution as the engine mounts on a 240 are angled which puts a lot of shear force on the m90 rubber mount that it was not designed for.

2) Use a rectangular box section to space out the rear of the M90 gearbox to use the 240 angled bracket and rubber mount. The difference in length between a M47 and a M90 is ~45mm. This is probably the simplest to make, but bulky and finding the material in the right dimensions is remarkably difficult.

3) Fabricate an angled bracket to take the 240 rubber mount directly. I was just designing one of these myself to be laser cut, but I see that Wagner has done a much better job than I could have. Good work. This is definitely the best way to do the job.
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Old 04-17-2017, 10:28 AM   #7
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Quote:
Originally Posted by crogthomas View Post
The difference in length between a M47 and a M90 is ~45mm..
For what it's worth, the difference in lenght is 50mm between M47 and M90. Just correcting it if someone sometime in the future googles for that.
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Old 04-17-2017, 10:49 AM   #8
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http://www.retroturbo.com/?product=e...for-200-series
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Old 04-17-2017, 10:49 AM   #9
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http://www.retroturbo.com/?product=v...lvo-200-series
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Old 04-17-2017, 10:49 AM   #10
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look at both of those.
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Old 04-17-2017, 04:13 PM   #11
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Quote:
Originally Posted by Wagner View Post
For what it's worth, the difference in lenght is 50mm between M47 and M90. Just correcting it if someone sometime in the future googles for that.
Sort of.

The difference in length to the output flange of the box is 50mm. The M90 is shorter. So this is the length you need to add to your 240/M47 propshaft to make it reach the gearbox. The spacer linked by Idealgaslaw is the simple way of doing that.

The difference in length to the mounting face for the mount bracket is ~45mm. The M90 is 438mm from bellhousing face to bracket poistion, the M47 484mm. This is the length you need to add to the rear of the M90 to allow you to fit the standard 240/M47 gearbox rubber mount and bracket. Or just shrug your shoulders and use the closest available stock size (50mm).

That said, your solution is much more elegant.
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Old 04-17-2017, 05:29 PM   #12
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Thanks all- I've been in contact with Wagner and have purchased one of his diy mount kits which looks great. As detailed above, this seems to be the best design of solution.

I'm not keen on the spacer idea, I'm going to have the propshaft lengthened and rebalanced- this is relatively simple and helped by me not needing the car daily, so I can measure and then send the propshaft off to be modified etc.

Cheers
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Old 04-18-2017, 12:13 PM   #13
Wagner
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Quote:
Originally Posted by crogthomas View Post
Sort of.

The difference in length to the output flange of the box is 50mm. The M90 is shorter. So this is the length you need to add to your 240/M47 propshaft to make it reach the gearbox. The spacer linked by Idealgaslaw is the simple way of doing that.

The difference in length to the mounting face for the mount bracket is ~45mm. The M90 is 438mm from bellhousing face to bracket poistion, the M47 484mm. This is the length you need to add to the rear of the M90 to allow you to fit the standard 240/M47 gearbox rubber mount and bracket. Or just shrug your shoulders and use the closest available stock size (50mm).

That said, your solution is much more elegant.
Oh, ok. Didn't know that. Never looked into the box section thing. Just saw the length difference mentioned.

Hot tip for those using the M90: replace the Volvo guibo with a BMW E34 M5 guibo (flex disc). It is 5mm thicker and supposedly stronger than the original one. Bolt circle is the same. With that one you naturally extend the driveshaft less than with the stock one, 45mm.

Part number is 26112226527. Price for an OEM one is around 100 euros.

Apparently also used in BMW E46 M3 and in the BMW Z3M -cars.
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