EDIT: SOLVED. See edit at the below.
I have researched this thoroughly and found conflicting info. Not that I have a strong desire to do it but I'd like to know if it is an option. I will be building my FJ40 soon and running an LM7, NV4500, to the FJ40 T-case.
Have a 93 GM NV4500 4wd with roached input drive gear and counter shaft driven gear, so both need to be replaced. Counter shaft gear should be separate and replaceable for this transmission. If I replace it with a 38t 4th gear I should be able to use a 22t input later GM shaft, as someone else has done with a Dodge shaft. I've read so many statements that it can't be done. but it seems like it has been done in this thread. (Although this swap was early GM with HD Dodge input shafts. But, if that was possible, then going to the 5.61 GM shaft should be even easier)
I understand if I swap the whole counter shaft, I'd be looking at a myriad of gear issues, so we don't need to discuss that.
Am I missing something?
The thread where someone has "done" it. Early GM MT4 NV4500 Behind a Cummins
EDIT: I contacted staff at Torque King and they verified my deduction. Here's a quote, "Most of these cases are the same as far as how the gears go in. So as long as you match the gears that mesh together with each other it will swap. People do this all the time."
I have researched this thoroughly and found conflicting info. Not that I have a strong desire to do it but I'd like to know if it is an option. I will be building my FJ40 soon and running an LM7, NV4500, to the FJ40 T-case.
Have a 93 GM NV4500 4wd with roached input drive gear and counter shaft driven gear, so both need to be replaced. Counter shaft gear should be separate and replaceable for this transmission. If I replace it with a 38t 4th gear I should be able to use a 22t input later GM shaft, as someone else has done with a Dodge shaft. I've read so many statements that it can't be done. but it seems like it has been done in this thread. (Although this swap was early GM with HD Dodge input shafts. But, if that was possible, then going to the 5.61 GM shaft should be even easier)
I understand if I swap the whole counter shaft, I'd be looking at a myriad of gear issues, so we don't need to discuss that.
Am I missing something?
The thread where someone has "done" it. Early GM MT4 NV4500 Behind a Cummins
EDIT: I contacted staff at Torque King and they verified my deduction. Here's a quote, "Most of these cases are the same as far as how the gears go in. So as long as you match the gears that mesh together with each other it will swap. People do this all the time."
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