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3886 Posts in 1208 Topics- by 2247 Members - Latest Member: Steve Ahmann

May 22, 2012, 04:24:05 AM
Maintenance IssuesTR4 RangeTransmission installation
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Author Topic: Transmission installation  (Read 609 times)
motomadness1947
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Posts: 19


« on: February 16, 2011, 09:45:24 AM »

I removed my transmission as per the manual without pulling the engine.  It was a bear to say the least.  Can anyone give me a hint on how to reinstall.  The manual had me tilt the unit to so the clutch action arm will clear the floor on the left side. That was a real problem.  to reinstall they just say reverse what you did when you took it out.  There has got to be something better.
I did have to remove the drive shaft in order to get the clearance to move the unit back far enough to clear stuff.  Also, this is a overdrive trans.  If anyone could give me a 1, 2, 3 proceedure that would help before i start.  At this point I do not know if I push the unit (insert the input shaft) before I tilt the engine to clear the clutch or tilt the engine and then push the unit so the input shaft enters the clutch disc and input shaft bearing.   If it would be easier then posting here, please give me a call 615-294-4238

Thanks
Bruce Fahnestock
Motomadness1947
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TR3driver
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Posts: 245



« Reply #1 on: February 16, 2011, 12:20:42 PM »

You can't (or shouldn't) try to mate the engine and gearbox until they are nearly perfectly lined up.  That means you will have to jack/tilt the engine first, so the gearbox will line up as you move it into place.  However, you can rotate the gearbox at first if necessary, so the clutch linkage will clear.  Of course you'll have to rotate it back to slip over the studs when it gets that close.

Put it in 4th gear before you start, so you can turn the output flange to help line up the clutch splines.  You'll probably also have to wiggle the gearbox around to get everything lined up inside.  The splines have to fit into the clutch plate at the same time the tip slides into the pilot bearing.

It's best to have help; if you are doing it yourself you may need to add boards or something to help support the gearbox during the mating process.  ISTR I used a small floor jack under the gearbox last time (on my TR3).  Try not to let it hang on the input shaft.  Once it's over a stud, you can start a nut and then let that support the gearbox while you put in the rest of the bolts & nuts.

Obviously, make sure the studs and locating pins are in place before you start.  Sometimes I have had to tie the clutch lever forward with string or wire, to keep the TOB from sliding out.

HTH
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Randall
58 TR3A TS39781LO :(now totaled Sad
56 TR3  TS13571L daily driver
71 Stag LE1473L waiting for engine rebuild
71 Stag LE2014LBW waiting for 4-speed rebuild
motomadness1947
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Posts: 19


« Reply #2 on: February 16, 2011, 01:40:19 PM »

Thank you HHT that is good advice.  Yes I will have someone helping me. 
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motomadness1947
Newbie
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Posts: 19


« Reply #3 on: February 16, 2011, 01:42:31 PM »

To get the clutch through the notch is it best to rotate the transmission top to the left or right?
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TR3driver
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« Reply #4 on: February 16, 2011, 02:40:19 PM »

On my TR3, it works best to rotate the top to the left, so the clutch lever hangs down below the floorboards.  I assume a TR4 is similar, but I've never actually put a TR4 back together Smiley
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Randall
58 TR3A TS39781LO :(now totaled Sad
56 TR3  TS13571L daily driver
71 Stag LE1473L waiting for engine rebuild
71 Stag LE2014LBW waiting for 4-speed rebuild
motomadness1947
Newbie
*
Posts: 19


« Reply #5 on: February 17, 2011, 06:01:03 PM »

We were able to reunite the engine and transmission today.  It went very smoothly considering the close quarters.  One suggestion.  Once we got the transmission to a point where the input shaft was just making contact with the clutch  I inserted two four inch bolts into the bell housing holes and threaded them into the engine block.  I did this at about 10 and 2 oclock on the housing.  The purpose was not to draw the bell housing and engine together but rather to give a great reference point on how straight things were lining up.  with the help of a jack and a friend we were able to line everything up, turn the transmission out put as we levered with a 2 by 2 piece of hard wood against the tunnel and the out put shaft. A little leverage and she slide all the way home. 

Thanks for the input

Bruce Fahnestock
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