confused again here...if the transmission is a t-39, then it's a standard shift. Atf service is done only on an automatic transmission.
Are we talking two separate units here?
A manual transmission in an ihc-produced vehicle "should" have a metallic tag mounted under some bolt head that will have the part number stamped in place.
The numbers which are cast into the actual transmission housing components are a part number only for that part and would be the manufacturer's number, not an ihc number.
I May be confused but I am basing the t-39 being an auto off information I found on the net about what came standard in the 71, here it is copied and pasted from the site:
1971. First production 4/19/71. Grille shell painted body color (pre-production units were dark gray) and had 3 horizontal slots. 4-196, 6-232, 6-258, v-304, and v-345 engines, t13/14 3speed, t44/45 4speed,
t-39 warner gear automatic transmissions. Fa-13 Dana model 30, fa-44 Dana model 44 front axles, ra-18 standard and ra-28 trac-loc Dana model 44 rear axles. 3.31, 3.73, and 4.27 ratios available. Spring ratings 2200# and 2400# front, 2000#, 2000#hd, and 2500# progressive rear. Black vinyl upholstery and dash standard, blue, sage, black, and red nylon optional.
The sii is an auto so if it is not a t-39 what tranny could it be. Is the metalic tag on a bolt head on the oil pan or somewhere else?
Just found and uncovered the original lineset ticket and found the code which is 13049. I did a search and have not found any matches yet but the t-39 13039 so that is obviously not a match.