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Swapping in a newer style M41 for an older style M41 1800 1967

Hi Everyone

I have a '67 1800s and I'm having problems with the O/D unit. It's not holding pressure so there's likely some internal o-rings that're not holding. There's oil leaking out the end of the O/D solenoid where the wire connects so that tells me the O-rings on the solenoid rod need to be replaced. This may also be why the O/D occasionaly tries to engage by itself even though it's turned off.

My car has an older style Laycock "D" type O/D unit and I had hoped that I could pull the solenoid and change the o-rings, etc. without having to take the whole tranny out but it appears that's not true and I'll have to take the whole darn tranny out just to service the stupid solenoid. What a drag. :(

Of course, it's quite possible that the problem with the O/D has to do with more than just the solenoid o-rings and if that's the case, getting parts for that old unit will be difficult and expensive.

If I have to go to all the trouble and expense of taking out the whole tranny then I have some other options to consider. I happen to have a used M41 which was taken out of a 70 or 71E sitting in my garage. I'm not real sure how good it is but I think it's ok. It has the later style "J" type O/D on it. I'm told those were a bit stronger than the "D" type Laycocks. The solenoid just screws on that one so it'd be easier to service than mine (mine bolts on) .

Option 1 may be to keep on using my current transmission but swap the overdrives. Does anyone know if it's possible to swap a J type Laycock for a D type ? I have a feeling there may be some incompatibility with the oil pumps so this may not even be an option for me.

Option 2 would be to swap the entire transmission. As far as I can see there are at least two technical issues involved with doing that. One is that my car has a hydraulic clutch and my spare tranny is set up for a cable clutch. I assume then I'd just have to bolt the bell-housing from my car onto this other transmission and I'd be good to go. Am I Right ?

The other issue is the shifter. My '67 has a different remote and the short little gearshift lever and this other tranny has the longer gearshift lever. The reverse light switches are in different locations too but I don't know if that's much of an issue. I'd prefer to keep my original shifter. My assumption is that I could just swap the remotes from one tranny to the other but that's just a guess. Does anybody know if it can actually be done ?

Are there any other issues in swapping an older style M41 w/ D type O/D for a newer style M41 with a J type O/D ?

Thanks in advance,

Roj






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New Swapping in a newer style M41 for an older style M41 [1800][1967]
posted by  someone claiming to be Roj  on Mon Oct 27 12:35 CST 2003 >


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