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pulling/installing driveline |
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lucky me 
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Joined: February-21-2007 Status: Offline Points: 1 |
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 Topic: pulling/installing drivelinePosted: February-22-2007 at 12:01am |
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have a 65 mustang with a 302 ford/velvet drive. transmisson needs replacing. can anyone tell me what is involved with or how to go about aligning driveshaft/tranny/motor,when i am putting boat back together. anywhere to find a manual on this subject. thanks!
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: February-22-2007 at 9:53am |
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Lucky, The alignment is pretty simple. I have never see any pictures of someone using a feeler gauge between the coupling halves. The following is the written instructions out of a marine engine manual. I recommend that you take the shaft to a shop that can use a dial indicator to check its straightness and also install a new cutless (strut) bearing. Someone else may have some pictures.
"The engine must be adjusted into alignment with the propeller shaft coupling. The faces of the coupling halves should be brought into contact and so aligned that a .003 inch gauge can not be inserted at any point around the periphery of the joint." Most of our guys will try for less than the .003". It can be frustrating bumping the engine from port to starboard or raising and or lowering the front or rear. The closer you get it the less vibration you will have as well as better rear trans bearing life. |
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SkiBum
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Joined: November-17-2006 Location: United States Status: Offline Points: 587 |
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Posted: February-22-2007 at 7:17pm |
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If you are in alignment before removal then after you put it back together you should not be very far out of alignment. Slide the flange of the driveshaft toward the flange on the transmission as close as possible without touching. Then, spin the driveshaft and observe the space between the flanges. If the gap remains constant during the entire revolution then the shaft is okay.
There would likely be a larger gap on one side or the other, maybe the top or bottom. The adjustments are made by adjusting the engine and transmission mounts. Height adjustments are easiest. You just loosen the retaining nut on the bottom of the engine mount then turn the stud trunion to raise or lower the engine/transmission. Lateral adjustments are made by loosening the bolt that secures the lateral trunion on all four mounts. Then you must leverage the engine/transmission to the left or right until it is positioned properly. I think that is more difficult than the vertical adjustments because you can just turn the trunion stud with a wrench for vertical adjustments. Lateral adjustments require easing the engine/tranny into the right position. You constantly check and recheck the gap between the flanges using the naked eye and perhaps a thick feeler guage. Once you are very close, slide the driveshaft until the two flanges just touch. That is where the feeler guage .003" is used. Patience is the key to success. |
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eric lavine
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Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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Posted: February-23-2007 at 8:08pm |
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I see some plagerism in those last 2 posts,
lol Eric |
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"the things you own will start to own you"
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SkiBum
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Joined: November-17-2006 Location: United States Status: Offline Points: 587 |
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Posted: February-23-2007 at 8:52pm |
You have taught us well...Master Eric! |
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graybee
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Joined: July-11-2007 Location: United States Status: Offline Points: 7 |
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Posted: August-11-2007 at 11:33pm |
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To LuckyMe,
I am starting a tranny removal - to get at the flywheel (some broken teeth on ring gear). I am trying to do this by just removing the tranny, and not the whole engine. Sounds like you might have some useful experience. When you removed the tranny at the mounts, did you do this by removing the screws that hold the mounts to the stringers? How did you get to the bottom bolts that hold the tranny to the bell housing? How is the tranny attached to the shaft out of the back of the engine? Sorry for what may sound like dumb questions - first time I've ever tackled anything this serious. |
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1979 Southwind 18 PCM351
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eric lavine wrote: