The 727 became the 36RH, I believe the last year was 2003.
All the cases had the same diameter dipstick tube hole, but later models went to a rubber sleeve that fit the reduced diameter tube, and that sleeve replaced the typical o ring design.
That’s being said, you can use any tube you want.
You just have to qualify the dipstick to reflect the correct fluid level.
Don’t focus on how much stick protrudes past the end of the tube, focus on the relationship of the full mark to the end of the tube. It’s been a while since I ran the fluid curves but if memory serves me the full mark should be at the top of the case opening for the tube so measure up from the end of the tube installed to the case ledge for the tube.
With a deep pan you can run it a tad lower if you like. Some people have a theory that the fluid should always be higher than the valve body to case flange and while that is ok, all the fluid level testing included driving the vehicle with angles that always uncovered this flange.
Last edited by Transman; 12/14/18 12:53 AM.