Is the M66 Rebuildable?

[Quickone4u]

I'd be in for a group buy.

I'll revisit this thread before I put a group buy thread together in the coming months.

Count me in for a group by as well. I'd rather have a rebuild kit and not need it then the other way around!

[martynunya]

Count me in for a group by as well. I'd rather have a rebuild kit and not need it then the other way around!

Same here regarding the group buy. Thanks for doing the research on this!

Sent from nunya

[Panzer25]

In for the possible group buy.
Jim


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[ImportService]

We're in for the group buy..Potentially for 3.

[TristanScott]

Also in for GB. Nice research. It's a shame about 1-2 synchro availability.

[BrotherMatt]

I connected with Miyel(reply #26) on this and hope to have details settled some time this week.

[kTaLgsTo]

I connected with Miyel(reply #26) on this and hope to have details settled some time this week.

Keep us updated!! Thanks.

[Hounddogger]

In for group buy if it occurs. 1-2 syncro assembly not being available is a bummer. From my experience in other transmissions, its the first two to go, because they are the most used

Doesn't the tech manual for the M66 state its the same synchro across just with a different number of plates... Volvo even mentions changing going from single to double... Would it be that bad to go from triple to double? 1-2 happens so quickly in this car... there's no load really.


https://www.volvoclub.org.uk/tech/2004r/R5-M66.pdf

[TristanScott]

Doesn't the tech manual for the M66 state its the same synchro across just with a different number of plates... Volvo even mentions changing going from single to double... Would it be that bad to go from triple to double? 1-2 happens so quickly in this car... there's no load really.


https://www.volvoclub.org.uk/tech/2004r/R5-M66.pdf

Just from looking at the diagram and reading that, looks like you could at the very least swap out the middle section of the synchro with one from the third gear assembly or the 4-6 assembly. I think the left most part looks specific to the gearset having different shaped tabs on the inner portion so that would have to be reused. Talking out of my @$$, never had this transmission apart.

[lookforjoe]

Cool that they have some of the synchos (Synchro Assy.). If the Volvo supplied M66 pdf is to be believed, the double synchros for 3rd can be used for upgrading 4-5-6







EDIT - $300 seems a little steep for the bearing kit. Most bearings are $10-20 MAX - there's only 10 altogether.

The first post doesn't list synchro assy pricing, I would be hesitant to replace just the friction ring, assuming that is what what is being referenced.

[BaltotheRolf]

I would like to know about rebuilding options as well... My 1-2 and 2-3 is quite crunchy... Subbed.

[TristanScott]

Any progress on this? I'm dropping the transmission today or tomorrow.

[kTaLgsTo]

Bumping to see if there was ever progress here...
Seems to have died

[bgrove]

I sure hope not... My M66 will be getting inspected shortly too and while I don't think anything is borked, it does have 246k on it....

[lilbuj]

Any update on this? In need of the third gear syncro.

[BrotherMatt]

My apologies to all. Not long after getting into this, along came an avalanche of critical personal items that needed my attention. I'm putting the last of the fires out this month and will be back at this. I know I am not the only one wants to feel a factory smooth M66.
Expect an update after the new year.

[TristanScott]

No worries, glad to know it's still a possibility to get these parts. I'm still interested. Really wish they could get the 1 and 2 gear synchros.

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[doru]

No problems with the gears yet, knock on wood, just the output axle going out (new diff acquired), but being able to rebuilt it is something very important. My first transmission went out due to 1-2 syncro, luckily for me under warranty.

I wish I could rebuilt the angle gear to. Mine is going out due to the splines wear and a reman one is $1500. So far could not find a used one with good splines. Looks like the definition of "good" varies a lot and many people that are selling them call good one that is 40% or more worn out.

Anyway let us know what you find. Any additional info is a progress.

[Skybred]

Does anyone know if Ganzeboom also has synchros for a M56 gearbox or where to get them? My 3rd gear synchro needs to be replaced

[MvI_S60R]

Interested.

I have the guts of an M66 sitting in a tub full of oil in the garage, I'd like to rebuild them and have an extra set ready

[VolvoRIGLT]

Any update?

[Octane Overdrive]

I would love to be able to get in on any group buy of parts. Just picked up a C30 T5 that needs some lovin'.