speedometer driven gear

[spinyard]

I have a jdm a340e out off a cressida. with a supra extension housing. 4.3 lsd
my question is, did they change the gear on the out put shaft or did they change the driven gear? and can i put any gear into the tranny (regardless if it reads right or not)?

thanks

 

[Moy]

If your rear end, for example, is a 3.91, and the driven gear in the tranny is for 4.30, you would need the driven gear for an A340E, geared for 3.91 (all turbo auto models IIRC). If you have a 3.73 then a 3.91 driven gear would give you the closest speedometer reading

 

[spinyard]

so your saying, that all the gears on the out put shaft are the same and that the speedo gears themselves change? i know i need a 4.3 gear as that whats in the diff. i just want to know if it will work with a jdm tranny out put shaft


the reason im asking is because i drove on this tranny for less than three hours and the gears seems to have striped. I checked all the cables, there good, i checked the gauge it self its good as well. i also dropped the tranny oil and ran it through a filter, tiny plastic pieces. i jacked up the back end and while looking at the gear, i spun the tires and the gear didn't turn. i presently cant get the gear out (no space to work on it till next weekend).

 

[spinyard]

i think im going to simplify the question a little.......
are all out put shafts the same on supra/ cressida auto trannys? usdm and jdm the same as well?
anyone?