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Selecting a clutch with Penta B230 and M45

Zev Fisher

Member
Joined
Oct 17, 2020
Location
Boston, MA
Hi All!

So here's an interesting one. The previous owner of my 1975 245DL installed a B230 penta motor (specifically an AQ151) which is mated to an M45 transmission (and j type OD). :roll:

I have to replace the rear main seal on the motor so I figure I might as well do the clutch while I'm in there, but I'm not sure how to determine what clutch / pressure plate / flywheel I need. Should I look for one that is specific to an M45 or are all redblock clutches the same regardless of what transmission is mated? I called IPD and they suggested this but I wanted to throw it out there to the crew before I pull the trigger.

https://www.ipdusa.com/products/5649/Clutch-Kit-for-Volvo-Sachs-KF24201-271263-101585

Many thanks!
 
Do you know the year of the transmission? Early ones (-'78) used the same course spline clutch disc as the the M40/M41 transmissions that is in the link from IPD. Since your car would have come with a B20 engine the trans must have been swapped but it may be a later one with a fine spline disc. Look at the shifter cage and you can tell which one you have.

Early transmissions with a course spline input have this shifter.

GR-49267.jpg


Late transmissions with fine spline input have this one.

GR-40436.jpg


This is the clutch kit for fine spline input.

https://www.ipdusa.com/products/5650/Clutch-Kit-1979-1984-240-740-B21F-B23F-Non-Turbo-for-Volvo-Sachs-KF24204-271266-101586

This all assumes that you have a flat flywheel. If you have a dog dish flywheel it will definitely be a fine spline transmission and it will use this clutch kit. It comes with 2 T/O bearings because Volvo changed the shift fork and it could use either one.

https://www.ipdusa.com/products/5655/Clutch-Kit-for-Volvo-Sachs-4K1010-104603
 
Last edited:
Do you know the year of the transmission? Early ones (-'78) used the same course spline clutch disc as the the M40/M41 transmissions that is in the link from IPD. Since your car would have come with a B20 engine the trans must have been swapped but it may be a later one with a fine spline disc. Look at the shifter cage and you can tell which one you have.

Early transmissions with a course spline input have this shifter.

GR-49267.jpg


Late transmissions with fine spline input have this one.

GR-65581.jpg


This is the clutch kit for fine spline input.

https://www.ipdusa.com/products/5650/Clutch-Kit-1979-1984-240-740-B21F-B23F-Non-Turbo-for-Volvo-Sachs-KF24204-271266-101586

This all assumes that you have a flat flywheel. If you have a dog dish flywheel it will definitely be a fine spline transmission and it will use this clutch kit. It comes with 2 T/O bearings because Volvo changed the shift fork and it could use either one.

https://www.ipdusa.com/products/5655/Clutch-Kit-for-Volvo-Sachs-4K1010-104603


Hiper, you always swoop in and save the day. THANK YOU so much for this info...I really appreciate it!! I don't know the year but there is a white paper tag on the bottom of the tranny that says:

M45 NR 1208140
And then on the next line it says...
FABR NR 219248

This doesn't seem like a date code though so I will take a look at the shifter linkage as you said.
 
Last edited:
Someone really mixed and matched parts on your car. An M45 trans doesn't use overdrive. That would be an M46. Of course if they changed the output shaft on your M45 they can add the overdrive. I think your best course of action is to get it apart. Then you'll be able to see what clutch and flywheel setup is in there. It could have either flat or dished flywheel and you can't tell till you get it apart.
 
Hey Hiper, any chance you could post or send those reference pictures for which shifter cage goes with which clutch / flywheel type again? I went back to this post and they disappeared, and the links no longer work. Thanks!!
 
Do you know the year of the transmission? Early ones (-'78) used the same course spline clutch disc as the the M40/M41 transmissions that is in the link from IPD. Since your car would have come with a B20 engine the trans must have been swapped but it may be a later one with a fine spline disc. Look at the shifter cage and you can tell which one you have.

Early transmissions with a course spline input have this shifter.

GR-49267.jpg


Late transmissions with fine spline input have this one.

GR-65581.jpg


This is the clutch kit for fine spline input.

https://www.ipdusa.com/products/5650/Clutch-Kit-1979-1984-240-740-B21F-B23F-Non-Turbo-for-Volvo-Sachs-KF24204-271266-101586

This all assumes that you have a flat flywheel. If you have a dog dish flywheel it will definitely be a fine spline transmission and it will use this clutch kit. It comes with 2 T/O bearings because Volvo changed the shift fork and it could use either one.

https://www.ipdusa.com/products/5655/Clutch-Kit-for-Volvo-Sachs-4K1010-104603

Hey Hiper, any chance you could post or send those reference pictures for which shifter cage goes with which clutch / flywheel type again? I went back to this post and they disappeared, and the links no longer work. Thanks!!
 
Do you know the year of the transmission? Early ones (-'78) used the same course spline clutch disc as the the M40/M41 transmissions that is in the link from IPD. Since your car would have come with a B20 engine the trans must have been swapped but it may be a later one with a fine spline disc. Look at the shifter cage and you can tell which one you have.

Early transmissions with a course spline input have this shifter.

GR-49267.jpg


Late transmissions with fine spline input have this one.

GR-40436.jpg


This is the clutch kit for fine spline input.

https://www.ipdusa.com/products/565...n-Turbo-for-Volvo-Sachs-KF24204-271266-101586

This all assumes that you have a flat flywheel. If you have a dog dish flywheel it will definitely be a fine spline transmission and it will use this clutch kit. It comes with 2 T/O bearings because Volvo changed the shift fork and it could use either one.

https://www.ipdusa.com/products/5655/Clutch-Kit-for-Volvo-Sachs-4K1010-104603
Hey Hiper, so it turns out the tranny is an m46. Would the above clutch kits / part numbers still apply for an m46 vs an m45?

Thanks
 
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