94-95 vs. 90-93 Midshaft

[Bobert540]

I was wondering if a midshaft from a 92 Sn will fit in a 94 Sn? I remembering reading they were different but don't remember how/why. Thanks!

 

[DirtyJ]

The mid-shaft in the 94-95 were a larger hub design, just like the RN SJ's.

 

[Bobert540]

Excuse my incompetence on this subject but will it still work or do I need to find a 94+ Midshaft?

 

[DirtyJ]

Excuse my incompetence on this subject but will it still work or do I need to find a 94+ Midshaft?

Your excused
It will not work, you will have to find/buy one with a larger hub.

 

[Bobert540]

Lol thanks. I appreciate the help!

 

[Big Kahuna]

for some reason I thought it was just the houseing that was different, not the shaft itself.

 

[DirtyJ]

for some reason I thought it was just the houseing that was different, not the shaft itself.

Now that Im not sure of, anyone else know if the guts and the shaft are the same?

 

[Bobert540]

Hmm maybe I should wait to put up a WTB ad since i already have the shaft.

 

[Big Kahuna]

Part numbers are different.

 

[Waternut]

Pretty sure all SJ pumps are interchangeable so the shaft between a 90-93 and 94+ would have to be the same at least on the back side. Now the engine side I believe has different threads for the coupler.

 

[ridethelip]

for some reason I thought it was just the houseing that was different, not the shaft itself.

The shaft is the same and can be pressed into early or late model sj intermediate bearing carriers (housing).I took a 1990 mid shaft assembly (small housing) and pressed the tshaft out and pressed it into a 1995 intermediate bearing assembly (large housing).

 

[Midlake Crisis]

The motor side coupler is the same on all of them because the cranks are the same.
The 90-93 has a different thread size on the shaft and (obviously) the shaft side coupler.

 

[ATS_Aaron]

for some reason I thought it was just the houseing that was different, not the shaft itself.

Mostly true.

The thread size where the coupler goes on the shaft is smaller on the early SN mid shafts. So if you have a coupler they will interchange. Most aftermarket couplers like the Kawi style will fit only the newer larger midshaft threads.

Edit - looks like Midlake crisis beat me on this by a few seconds.

Aaron