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08-26-2020, 09:52 PM | #1 |
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Removing transmission 1947 Mercury
Has anyone actually done this according to the shop manual?
Hi kids, So I've had the engine and transmission (side loader BTW) out of my (basically stock) '47 Merc a few times. Each time, I did this by going out the front... once with engine and trans connected and twice with them separated. Other than some grunting and a few choice words, each procedure went fairly well. Now, I need to remove the transmission again. This is a running/driving car. Everything is neat and tidy in the engine compartment, so I thought I'd do what the shop manuals suggests and remove the torque tube, then remove the trans out the inside of the cabin. The torque tube came out easier than I expected. (How often does that happen?) Propping up the engine and disconnecting the trans bolts... no sweat. The rear saddle mount has been removed. Time to slide back the trans to clear the input shaft from the clutch... Problem! The trans housing/casting won't slide back far enough to clear the shaft... It hits the inside of the frame and/or top of the floorboard hump with the rear mount bosses. I need at least another 1/2 of rearward movement to clear... and it's just not there. I raised/lowered both the engine and trans numerous times and angles, and still can find the sweet spot where the trans can lift out? What am I missing? Has anyone actually done this successfully? (I assume 46-48 Ford is the same) Thanks. |
08-26-2020, 10:04 PM | #2 |
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Re: Removing transmission 1947 Mercury
I have done this many times on my 41 Ford. I think your car may have the same setup. Once you remove the floor cover for the transmission there is another small plate on the firewall just over the top housing of the transmission. Its about 6 long and has a few screws to hold it in place. This should give you the 1/2 your looking for. It might be hidden under the inside fire wall cover.
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08-26-2020, 10:06 PM | #3 |
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Re: Removing transmission 1947 Mercury
Hi Bursonaw, I forgot to mention that I have already removed that plate. It still didn't give me enough room.
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08-26-2020, 10:14 PM | #4 |
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Re: Removing transmission 1947 Mercury
I'll also add that I had a couple friends over at the time who also own, and have built flathead coupes, although older '34-'36. None had done this procedure as written in the shop manual and and none of us could figure this method out. We had people on top and underneath with bright LEDs blazing and the consensus was either fagetaboutit or start over and go out the front, or contact this forum.
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08-26-2020, 10:15 PM | #5 |
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Re: Removing transmission 1947 Mercury
The only thing I can think of and it sounds like you may have done this. I use a scissors jack under the oil pan and lift the engine up to where the transmission housing is almost touching the firewall before I slide it out. Ive loosened the front motor mounts as not to cause to much stress on the front engine mounts.
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08-26-2020, 10:20 PM | #6 |
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Re: Removing transmission 1947 Mercury
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08-26-2020, 10:22 PM | #7 |
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Re: Removing transmission 1947 Mercury
Good luck, if you find the magic formula I would be interested in the result. Sorry I could not be of further help.
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08-26-2020, 10:26 PM | #8 |
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Re: Removing transmission 1947 Mercury
Bursonaw, thanks for your attempt anyway. I appreciate it.
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08-26-2020, 10:27 PM | #9 |
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Removing transmission 1947 Mercury
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08-26-2020, 10:49 PM | #10 |
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Re: Removing transmission 1947 Mercury
well, i am not a 47 merc guy, but i wonder how you get the torque tube out with out moving the rear end back? and, if you only need a 1/2", cant you rotate the trans so the bottom sump area is not hitting the x member? , like, 90* to the right? never been there, just some thoughts
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08-26-2020, 10:52 PM | #11 |
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Re: Removing transmission 1947 Mercury
If its anything like my 35 pickup you have to install the rear mount [bearing retainer] after . But I think you've done that..??
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08-26-2020, 11:07 PM | #12 |
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Re: Removing transmission 1947 Mercury
After sliding the trans back,
You may have to twist the transmission to the right to clear the crossmember. Then you can remove the trans. |
08-26-2020, 11:21 PM | #13 |
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Re: Removing transmission 1947 Mercury
Slowforty, I think that might be it. I just came in from the garage after staring at this again... by myself... no other distractions, and I came to the same conclusion that if the engine/trans is jacked way up as far as it can go yet clear the firewall, then I pull back and rotate the trans housing (I'm thinking counter clockwise from inside the car to clear the side shift levers) that it could just work. So that's the next plan, when I can go work on it again.
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08-26-2020, 11:26 PM | #14 |
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Re: Removing transmission 1947 Mercury
cas3... YES, you have the right idea too! I'm going to try it hopefully tomorrow. The torque tube, dif, rear axle, springs, are all one unit. After disconnecting things like shocks, sway bar, brakes etc, then I placed a set of old rims on to protect the drums, unbolted the leaf springs and with a few tugs, it drops down and slides right back. I moved it about 8" which is more than enough to make room up front.
Last edited by justanotherguy; 08-26-2020 at 11:59 PM. |
08-27-2020, 10:12 AM | #15 |
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Re: Removing transmission 1947 Mercury
I'm probably not a ton of help here, but I took the transmission out of my '47 Ford through the top after I pulled the rear about fifteen years ago. I don't recall there really being any problem, maybe just need to come back fresh and keep wiggling it.
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08-27-2020, 03:39 PM | #16 |
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Re: Removing transmission 1947 Mercury
I had a 48 Merc back in 57 or 58, Those Cluster gears were a little fraggle so I had to replace my Trans a few times. If I remember right I took it out from the bottom and put it back the same way. I use to drop it, well not drop it, bring it down and rest it on my chest and belly, did the reverse putting one back in.. I supported the car up high enough to roll the rear end assy back. Reverse things to go back in. I sure couldn't do that today. It was cheaper to buy a complete used Trans than a new Cluster Gear. Think I was paying $12-$15 and the junk yard removed it.
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08-27-2020, 07:06 PM | #17 |
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Re: Removing transmission 1947 Mercury
AN UPDATE (but not what we wanted to hear)
So a few more hours were spent on this 10 minute job today. The consensus from all three knuckleheads in attendance, is that it can't be done according to the manual. Marvin/TN – In order to go out the bottom, the wishbone would need to be dropped, and even then it won't work on this old Merc. We managed to rotate the trans well over 90° both right and left which indeed gave us hope, but still we needed 1/4"-1/2" more travel to have the input shaft clear the pressure plate, at any angle... this is with the housing hitting the backside of the chassis and then some. Now, during the time I have my face smashed up against the trans housing from under the car... and attempting to peer into the gap between engine and trans with flashlights blazing in all directions (mostly in my eyes) I became aware of one possible cause for this snag. The clutch and pressure plate had been replaced previously. I'm wondering if the pressure plate from Fort Wayne Clutch is just "thicker" enough that the input shaft won't clear. Perhaps a stock '47 Ford part pressure plate is just thin enough that the shaft can squeeze out. This is speculation until I can call them tomorrow. And let me be clear... I have had nothing but great experience from Fort Wayne Clutch... those guys are awesome. So if it turns out to be the pressure plate, it's on me for not being able to predict the future. Stay tuned for a possible update. Unrelated: For Sale: 1947 Mercury, partially disassembled... new clutch and pressure plate from Fort Wayne Clutch... torque tube and several flash lights, sold separately. |
08-27-2020, 09:05 PM | #18 |
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Re: Removing transmission 1947 Mercury
The last time that I did this on a 1947 Mercury was in 1952, so I don't remember everything I did. The engine has to be jacked up enough to allow the back of the transmission to clear the floor pan hump for the torque tube. The back end of the trans has to be inside the car before the input shaft will clear the clutch.
Post some photos showing your problem areas if you cannot slide the trans back inside the car.
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08-28-2020, 12:08 PM | #19 |
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Re: Removing transmission 1947 Mercury
Mystery solved: I slept on it. Then I got up this morning, and with only one cup of coffee (it usually takes 3) went out to the garage to take some measurements. Taking measurements from another flathead block with stock clutch attached, that pressure plate protrudes 7/8 into the trans housing. The Pressure plate I got from Fort Wayne Clutch protrudes 1 1/4 into the trans housing. And that my friends, is the 3/8 difference that I needed to clear everything. Not an issue if everything comes out the front. Mystery solved. Now, where did I put my left handed radiator wrench?
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08-28-2020, 01:59 PM | #20 | |
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Re: Removing transmission 1947 Mercury
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