what is intaller (tool)8408?

its for an oil slinger in the rear of a 242 tcase. Is there a "at home" tool I can use?

can I replace the oil slinger w/out it?

(step 10)
Thanks,

Tom

page 21-401 (page 1309)

(8) Slide seal onto Seal Protector 6992 (Fig. 89).
Slide seal protector and seal onto output shaft.
(9) Slide Installer C-4076-B onto seal protector
with the recessed side of the tool toward the seal.
Drive seal into rear bearing retainer with Installer
C-4076-B and Handle MD-998323 (Fig. 90).
(10) Install rear slinger with Installer 8408.
(11) Install boot on output shaft slinger and crimp
retaining clamp with tool C-4975-A (Fig. 91).

I just checked the FSM for a 96 and it does not call for a special tool to install the oil slinger,I THINK that a section of pipe the correct diameter could be used to drive the slinger into position.
Wayne

pipe did the trick, thanks