Case 450 Crawler Torque Converters Explained
3 Types of converters
Date: 4-11-11 Rb.

Early torque converter
D35012
Twin Disc 6-F-1108.
Spec #. N98328
This torque has a 12 bolt steel -ring gear that bolts right to the torque converter. No inner teeth on the ring gear.  The outer teeth go inside the flywheel.  The flywheel has teeth inside as well as the outer starter flywheel ring gear. Outer torque converter ring gear measures 12 ¼” outside diameter.  This torque uses Flywheel part number A36594.  Flywheel is the same for torque D35012 and  torque converter D45565. You can convert the D35012 Torque to D52422 late style.

Middle torque converter
D45565
Twin Disc X-209547-E
Spec # N60623
 Use’s a fiber-ring gear.  The fiber ring has teeth inside and out.  It connects the inside teeth to a 10 ¼ ring gear on the front of the torque converter and the outer teeth on the fiber gear go inside the flywheel A36594.  Twin Disc manufactured this torque.   You can sub this torque to the D52422 as long as you change the flywheel A39213, 6 outer bolts part number 28-520, 4 inner bolts part number 121-300 and 4 washers  part number A30013.  Flywheel A36594 can be used on either  D35012 torque converter and D45565 torque converter.

Late torque converter
 D52422
Twin Disc X-209547-F
Spec # 61896
 Late style uses a flex steel plate D52483, no ring gear.  Use flywheel A39213 for this torque. This torque converter has 6 outer bolts and 4 inner bolts to support the flex plate.

I hope this helps clear the air on these torque converters.

Thanks for visiting Bob’s  corner

Bob Baumgras
bobscorner@owossotractorparts.com

www.owossotractorparts.com