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locked tranny

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fmichaels

fmichaels

Jedi Knight
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as part of my 67 ah rebuild, i recently inspected the transmission. the reason i stopped driving the car 20 years ago was inpart due to a locked tranny. it happened at least 2-3 times and was a concern. now that i have the time to inspect and repair the transmission, i know very little about the condition. as i understand it, this is not uncommon for these 4 speed beasts. all the gears look fine and there are no pieces of metal on the gearbox. the shifting rods are all locked. i cannot figure out what to do next. taking it apart seems scary and i was wondering if there is any reference that can be used to ensure i am not left with extra parts? thanks in advance
 
Hello FM,
the shifting rods you say are locked, but these are kept in position by spring loaded balls into an indent on the rod. They should move if you use a small drift and a hammer. Try and set all rods to the neutral position, this is where all three rods have the fork end that the gear lever engages into in a line from three to nine o'clock looking into where the gear lever locates. You should be able to turn both the input and output shafts in this position. You should also be able to turn both shafts at the same time in either direction, i.e. there is no gear engaged. If this is OK, then it is probably a gear selection problem. You don't say what car it is precisely, and I know some BMC (as was) models have shifting mechanism on the side of the gearbox.
I strongly suspect that the cause is a gear selector one and careful examination is required of that mechanism.

Alec
 
thanks for the response. i will try moving rods like you said and follow up.
 
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