well i rebuilt (tore apart) 2 L52s last night to make one that worked.
most of these picts u can compare to yours for taking stuff apart.
first off the L52 is the first 5 speed they put into their us trucks. the L50 is basically the same but only a 4 speed.
-there are 2 different sized input bearing used in these trannies. butt the input/output/lower counter shafts are the same. but the housings, front bearing retainer and bearing are different and not interchangeable.
-some things i would like to point out are get a medium brass hammer and punch (u can hit the gears and they will not get messed up). snap ring pliers.
here are the pages from the fsm for the L52
i took these picts in reverse once i figured out how to take one apart.
i will try to do this in removal order from a complete tranny.
top view of transmission with the cover case/shift lever retainer removed
input shaft with bearing retainer on
-front bearing retainer off.
-you do not have to remove the snap rings on the in upper input shaft unless you are changing the bearing etc behind it.
-remove the lower 2 on the lower counter shaft end (the one below the input shaft with the splines).
-tail end of output shaft up top and lower counter shaft below with the shift fork.
-remove 4x4 sleeve off of upper output shaft. NOTE!!! when reinstalling this sleeve you MUST put it on with the line towards the front just like in this picture. if not your output splines will strip off and you will be screwed and need a new output shaft. notice in the last picture below you can see the splines that have been stripped off. someone else s screw up and my clean up.
-sleeve removed and the snap ring removed that was infront of it.
-also remove the other snap ring infront of the one that is removed. it is touching the 5th gear on the same shaft (output shaft) as the sleeve.
-with the sleeve and both snap rings removed from the output shaft. you do not have to remove these snap rings if you are not removing the bearing/gears.
-with counter shaft retaining nut removed and gear spline no. 5 and synch ring removed. also 1/2 of the bearing slid out (only for the picture).
-drive dowel pin out of the 5th gear shift fork/shaft
-shift fork and counter 5th gear assy off.
-thrust washer and detent ball still on shaft, remove them.
-remove thrust washer and detent ball.
-remove the 4, 12mm (head size) bolts with torx in the head, that secure the rear bearing retainer and remove bearing retainer.
-remove upper retaining ring off of output shaft bearing outer edge.
-remove counter center bearing off of the lower counter shaft output.
-also remove center front bearing and snap rings.
-with these bearings removed from the lower counter shaft drop it down in the housing like in the picture. with the front of the counter shaft dropped down this will allow for you to seporate the input shaft/bearing/gears from the output shaft.
-with the lower counter shaft dropped down this is the input shaft assy.pulled out only like 1 inch. you can see the snap ring (to the left of the brass synchro ring, on the splines down in there) that is pictured 2 pictures down, the one with the screwdriver pointing at it.
-pull input shaft out through the bellhousing side.
-top view with input shaft assy. removed
-front snap ring on output shaft. remove
-removing clutch hub keys (there are 3 total) on clutch hub assy. no.2
-clutch gear removal
-clutch slider removed up through top opening.
-third gear assy., bearing and synch ring sliding off through the bellhousing hole.
-third gear assy/clutch hub no. 2 held inline removed from output shaft.
-here is how the rings on the inside of the clutch hub have to line up. note how each keyway has the ring covering the gap. the 2 ends stop just past each of the keyways. if the rings are not installed like this on both sides the little keys will not be supported.make sure they are pushed all the way against the hub wall. like in the picture
-slide the output shaft towards the front and stick the front of the output shaft out the input shaft bearing hole into the bellhousing. then lift up the output- output splined end up and out.
-input and output shafts removed
-lower counter shaft in bottom and reverse gear on lower shaft in upper left of housing. above that the 5th gear shift lever with the ball and pin coming up out of it above the reverse shaft.
-outside of the housing on the bottom is the output shaft with the bad output splines from having the 4x4 sleeve put on backwards.
-removal of counter shaft. slide out back side bearing hole and lift out the top cover hole.
-counter shaft out and reverse gear slider/shaft and 5th gearshaft
take your time and label everything. once the counter shaft and input/output shafts are back in put the rear bearing retainer on before you put back onthe counter 5th gear assy. good luck and if i forgot anything please chime in. or message me, because i know i forgot a bunch of stuff