Which mount keeps breaking?
If I recall all three transmission mounts/brackets are different (if I recall) from GT 5speed to GT auto to N/A 5speed...
Rear transmission mounts -all 3 are different
Upper Transmission mounts -all 3 are different
Front transmission mount -N/A + GT 5speed use the same motor mount (Not sure about the transmission mount bracket it bolts to) Automatic mounts are different.
Rear 5speed GT mount(2piece):
Notice the the bracket is welded to the edge of the mount, it sits closest to the drivers wheel, this allows it to fit the larger GT transmission.
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Rear auto GT mount:
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Upper auto GT mount (Similar to the 5speedGT but sorter, wider and the offset bolt hole is higher then the GT 5speed):
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Upper N/A 5speed mount (small bracket, flat base, offset mount bolt hole):
Beware Rockauto has the Westar EM8088 N/A 5speed transmission mount listed in the GT section listed as Standard transmission rear but it's not a GT standard transmission mount.
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Upper 5speed GT mount:
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Front auto GT mount (notice the angle of the bottom or the offset between the center hole and bolts, it sits closer to the engine then the 5speed mount hole) :
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Front 5speed GT mount (rockauto list the same part numbers for both GT5speed and N/A5speed):
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For the Rear mount the 5speed N/A mount is also 2 piece and looks like the GT mount but the arms are longer and the bracket is welded to the center of the mount to fit the smaller N/A transmission:
(This one is in the GT 5speed transmission section of Rock auto but the picture looks like an N/A 5speed mount but that could just be the way it's designed):
Look at the GT 5speed mount pictures, you can see how close the dip in the bracket between the two bolt holes is to the mount, the N/A dip sits farther from the mount, also in the last pic it looks like the bracket sits in the middle of the mount not the edge, but it could just be an N/A mount pic with a GT part number?
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The other half of the mounts, the piece the long mount bolt goes to.
Rear lower, this bolts to the crossmember and that part is all the same (maybe not on the AWD N/A's sold abroad). 100%
Upper transmission mount, I am 99.9% sure this bracket is universal, the 4 M10 14mm bolts that mount it to the frame are always the same and I would say (because of the different distances to the bolt holes from the mount N/A,GT, GT auto) that the hole for the mount bolt is in the same location on all brackets.
Front transmission mount bracket, this one I cant remember but there is a chance the bracket for the N/A 5speed has a larger distance between the mount hole and the transmission bolt holes then the GT because it's a smaller transmission (n/a).
-I am going to say you have the right upper transmission mount, I don't think the auto or N/A 5speed would fit without stretching the engine and transmission.
-For the rear mount, after the upper transmission mount and engine mount are bolted the N/A 5speed mount would meet the transmission and not the edge, you would have to bind the mount towards the drivers wheel and the bolt holes would sit at an angle and line up with the diff housing and not the holes on the edge of the transmission. However if the 5speed N/A mount was installed first then it would bind the upped and engine mounts and be hard to position the front mount, if all three could be bolted up the front and rear mount would both force against each other.
-If you have a autoGT front mount it could push the transmission back onto the rear mount and put most of the torque and load on the upper and rear transmission mount.
-If the front bracket for an N/A 5speed is different then the GT and you where running that it would have the same effect as the auto front mount on the upper and rear mounts.