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TR4/4A Can't get the TR4 tranny and OD to mate up
- Thread starter Jerry
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trrdster2000
Luke Skywalker
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Jerry, the last gear or gears are moving on you. We have used a light smear of grease on them with a long screwdriver, just push it into the space between gears and see if that will work.
Wayne
Wayne
trrdster2000
Luke Skywalker
Offline
Well done Titanic, that does come into play. Didn't we use a wire to pull that back long enough to get the pieces together. Been a while.
Wayne
Wayne
You must align the splines in the sun wheel with the final splines of the clutch.Shine a light down into the OD and look at the two sets.
They have to be spot on when you lower the tranny down onto the unit. Save the beer for latter on this one .....
takes a few tries .....
MD(mad dog)
They have to be spot on when you lower the tranny down onto the unit. Save the beer for latter on this one .....
takes a few tries .....
MD(mad dog)
pump is wired down. burned up a flashlight staring down that hole to make sure the splines are lined up. We have tried about 6 times now and no luck. Gets to 1/2 inch and is too hard to go further. I have done this on Healey transmissions without so much trouble. I just can't see the problem.
Jerry
Jerry
Is it possible that the resistance is from the compression of the clutch springs? If the splines are lined up and the pump plunger wired down, I can't think of anything that would prevent mating. On the other hand, I wouldn't want to crank on the nuts with enough force to damage the adapter plate. I presume that od is vertical, bolted to a stand, and the clutch springs haven't come out of place as you lower the trans over the od.
Berry
Berry
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Jerry, I just did this last year. Twice! So, one would think I could tell you exactly what the problem may be. I'll try with some guesses.
First, I used a makeshift dummy mainshaft to line up those splines. You must have the sun gear and clutch gears both aligned, of course, not just the sun gear. Mine got a little out of line but that wasn't my problem in the end.
Next, no matter how careful you were, step back and ask yourself if you have the elliptical cam upside down. I eyeballed mine after knocking at about 1/2 inch apart, and that was the problem precisely.
OK, now if the cam is correctly in place, the other tricky part is getting the splines to slide into the cam. My cam wouldn't hug tight to the transmission mainshaft, no matter how much grease I tried as the manual suggested. It kept sliding down and out of place as I lowered the transmission toward the OD, and I had to use a 90 degree pick to reach in and pull the cam into alignment. It was tricky, but I got it. And that happened twice.
If you have all of this correct, and the pump is wired down, then be sure your wires aren't infringing upon the casing, and that the dowels are aligning properly.
Finally, if the end of the mainshaft isn't perfectly aimed down into the tail of the annulus, that could be the problem. A slight rock in each direction may help.
I'm suspecting the cam in one of the scenarios above, but it could be the splines or the end nipple of the mainshaft.
Good luck.
First, I used a makeshift dummy mainshaft to line up those splines. You must have the sun gear and clutch gears both aligned, of course, not just the sun gear. Mine got a little out of line but that wasn't my problem in the end.
Next, no matter how careful you were, step back and ask yourself if you have the elliptical cam upside down. I eyeballed mine after knocking at about 1/2 inch apart, and that was the problem precisely.
OK, now if the cam is correctly in place, the other tricky part is getting the splines to slide into the cam. My cam wouldn't hug tight to the transmission mainshaft, no matter how much grease I tried as the manual suggested. It kept sliding down and out of place as I lowered the transmission toward the OD, and I had to use a 90 degree pick to reach in and pull the cam into alignment. It was tricky, but I got it. And that happened twice.
If you have all of this correct, and the pump is wired down, then be sure your wires aren't infringing upon the casing, and that the dowels are aligning properly.
Finally, if the end of the mainshaft isn't perfectly aimed down into the tail of the annulus, that could be the problem. A slight rock in each direction may help.
I'm suspecting the cam in one of the scenarios above, but it could be the splines or the end nipple of the mainshaft.
Good luck.
alanjohnturner
Jedi Trainee
Offline
I did this quite easily without any dummy mainshaft. But I stood the gbox on its bell end and lowered the OD onto the shaft. As soon as I got engagement I tipped it horizontal and wenon from there.
Does not sound like you are trying to do it this way.
Al.
Does not sound like you are trying to do it this way.
Al.
The transmission and OD are mated. I don't know if this actually fixed it but we took apart the OD again and readjusted the sunwheel. I had originally set it with all the Ns pointing in. This time it was done with the dot pointing in and the system when together. Thanks for all the ideas.
Jerry
Jerry