Willys 6-90A Clutch / Bellhousing.
This was new for 6-90A which has the shift lever protruding from transmission rather than the bellhousing as on Willys 98B, 98D, 97, 6-90.
Dimension A is 4 1/8", Dimension B is 6 1/4".
Dimension C Lower bolt centerline to input shaft centerline is 2 1/2". The hole for the transmission bearing retainer is 4 1/2" diameter.
Dimension D is 8 1/2".
Clutch throwout bearing is marked Nice, PA No 5094-1 but it appears as if this is no longer available.
Transmission is clearly marked T83-1 and then it has a date tag cast below showing 1932 as the year.
View of the seaparate Freewheel unit FW 01A. It has its own oil fill and drain plugs so don't forget these !
6 bolt Transmission shaft flange.
Note that the transmission bearing retainer is held on with 4 bolts. Later T86, T90 retainers were 3 bolts.
Input shaft is 1 1/8" diameter with 10 splines and protrudes 8 1/2 from transmission case with 2 1/2" of usable spline length.
Input shaft gear has 16 teeth. Next gear has 22 teeth.
1st/Rev gear has 29 teeth and slides on 6 splined shaft.
Brass sychronizer rings have 30 teeth.
I was unable to count the teeth on the countershaft gears.
Top cover bolts have 4 5/8" spacing for width, 7" spacing overall, 3 3/4" front bolts to center bolts.
Transmission case length is 8 5/16", then the separate freewheel unit adds 5 3/4" to universal joint flange.
