Question to all RWD.

This summer I plan to change the clutch on 92 240. I was thinking of swapping the M47 trans as well. It is starting to whine a bit (180kmiles) and is shifting heavy. About two years ago a changed the oil to Redline MTL with great results, before it was sometimes impossible to shift. I guess the syncros are worn.

I will have some time to find a proper unit with low miles (in Europe there are plenty around, just have to find the right one).

Came accross some junkyard damaged 940's with B230F, M47 and little miles. Can I fit a 7xx/9xx M47 in a 240? Naturally I have all the shift linkage etc. I need to know if there were any production differences or is an M47 an M47 regardless of car?

Many thanks,


Jorn, Oslo Norway 92 240 B200F M47 180kmiles UK spec.

The synchros should not be shot at "only" 180k miles. Difficulty shifting can be caused by an improperly adjusted or worn clutch that is not disengaging completely.

If you are going to replace the transmission anyway, you might want to consider a low mileage (or rebuilt) M46. The M46 benefits from superior lubrication and generally seems to be more robust than the M47. It is a four speed gearbox with an electrohydraulic Laycock de Normanville overdrive. The overdrive can be somewhat problematic, but most of its problems are electrical in nature and easily remedied. M46's should be plentiful at a salvage yard near you, and the overwhelming majority of them are still serviceable.

Remember to replace the rear main seal when you do the clutch. Also check your u-joints and center carrier bearing for play.

Thanks.

The clutch seems to be disenganging properly, I never have grinding when putting in reverse (unless 0.5 second after clutching out)

A M46 IS a good alternative, I had a 84 which in fact suffered the electic OD failure, fixed in 10 min!. They are great and the OD is a better cruising ratio as well. I am looking for feather light shifts now, so I will include low mileage M46 in my search with new oil naturally.

Rear main seal, fly wheel skimming, pilot bearing, driveshaft check and startermotor clean and grease IS included.. I have weeks to plan this as the clutch is still working fine and I would be struggling changing it over in Winter. This will be one of those jobs done right!

Reg,

Jorn

make sure you change the pilot bearing (in the flywheel hoiusing) This can cause all sorts of whining & vibration problems as I recall from a "cheap" clutch job back in 1986.

Volvo clutch...175 000 km Cheaper clutch...35000 km. Lots of noise & Vibration (because of now really rooted pilot not being changed)
Same driver!!

I learnt

Yeah, better do it yourself is my experience. The pilot bearing should not make much of a difference when clutch is engaged, it does not rotate then, unless there are alignment issues. Anyhow, I will do the whole wack incl pilot bearing!

Thanks,

Jorn

Hi,
You will have to make sure the clutch works the same way. In other words the
trans itself is the same but you may have to change over the bell housing
as well as the shift linkage. The US models have a hydraulic clutch at least
the manual turbos in the US do. So that's why I was saying change the bell
housing also.


Dave 82 242ti

So you are saying the box is the same, the bits around it I might need to swap? That be OK.

My car is UK, with steering wheel on wrong side etc. ALL UK volvo's have hydraulic clutch. Easier to root a hydraulic line to the otherside than a cluth cable. Lot nicer than cable I think, self adjusting etc. I will have to swap some parts there, the Norwegian/Swedish cars ALL have clutch cable (poor guys!)

Thanks will report how things went.

Reg,

Jorn

Are you saying dlot that all M47s are identical, or just that they will fit?
Are all the ratios the same?