The "X" in
ty752xh1aa and in
ty752xgbaa stand for Dual Range.
If the dual range reduction ration is slightly different, then this should not matter for a replacement.
The reduction is on the input and will affect the total gearbox equally.
The issue will be the final drive ratio.
The ty752xh1aa was stated to come from a Forester (in one of the links provided to you, above)
Should this be true, then according to my Factory Workshop Manual library, an early model 2.0litre N/A Forester had a 1.447 low range reduction gearing and a 4.111 final drive ratio.
Also the transfer reduction gearing was 1.000 (or 1.0 to 1.0, with no reduction)
Your mission is to determine
(a) whether this is true for the ty752xh1aa gearbox and what is the story for the original ty752xgbaa?
(b) what is the final drive ratio in your present vehicle.
Here I will apologise upfront. I am an Engineer and I will expect that everyone else will keep up with me.
If your present vehicle is still rolling, here is what you could do.
You need about 3 metres of clear level ground.
With all four wheels on the ground, and with the car in neutral mark a 12 O'clock position on both front tyres. Use a white paint marking pen or the like.
Under the car, mark a position on the tail shaft with the white paint pen (This may be easier said than done, you may need to remove heat shields and the like and find a suitable visible position to make the mark)
Roll the car (backward or forward) in a straight line until the front tyres have rotated through one full revolution and the paint mark is back at the 12 O'clock position.
While rolling the car, have an accomplice monitor the number of revolutions of the tail shaft.
Almost forgot to add, do not run over your accomplice in the process!
The available Subaru ratios are
3.700 (highly unlikely) The tailshaft will have rotated through closes to, but under, 3 and 3/4 revolutions
3.900 (unlikely but possible) The tailshaft will have rotated through closes to, but under, 4 revolutions
4.111 (likely) The tailshaft will have rotated through between 4 to 4 and 1/4 revolutions
4.444 (unlikely) The tailshaft will have rotated through more than 4 and 1/4 revolutions and just short of 4 and 1/2 revolutions.
This should allow you to determine your final drive ratio.
Go here to where a link to a 1995 Liberty Factory Workshop Manual is identified.
viewtopic.php?f=45&t=31478Within this data should also be what is within your present car?
Once you have determined that it is compatible (the same) as that of the replacement box, you may be good to go!