- Tue May 31, 2011 6:50 pm
#24015
(Edit 4/28/2016) Clarification of #7 vs #7r gearboxes - Thank You Taz!
The newest 7Rs are coming through with white gears. The best way to tell at a glance would be the plastic clips that hold the case together. The #7 has clips and screws, the 7R just has screws. Also, the #7 driver has flat spots inside it and the 7R has a driver that is round on the OD and ID.
The #7and 7R have the same gears inside(Ratio) for all pinions however there are 4 different types of gears depending on production date. The 7R gears only work in 7R boxes. The #7 gears came in 3 versions. The newest had blue colored center gears and they will only work in boxes with blue gears. The all white gears in the #7 come in two versions: New (coarse tooth) and old (Fine tooth) They are all interchangeable as long as they are changed as a set. The final ratios in ALL cases are the same. Ratios are changed by the pinion count only.
PHEW!
.......easy right?

********************************
The truth of the matter is, there is NO info on the 7R gearboxes in the gearbox thread. We,as a group, know very little about them.
It just so happened that I came across a 16t 7R today!
THE 16T PINIONS ARE THE SAME! 32p. The difference seems to be the plastic collar that centers the motor. It has a different diameter.
The case is similar but does not have the plastic latches. Thay are not numbered anymore.....completely anyway. They are broken down into groups by a dimple on the case (like the old MF gbs) 13-14, 15-16-17,18-19-20, and 21-22-23.
Not sure if they change gear sizes inside to make the 3 pinion sizes fit one case. I only have 1 16t to work with. I can tell you for a fact that the 4 gears inside are different that the old #7. The pin sizes and tooth sizes have been changed. Hopefully more will surface and we can finally get some 7R inside info in the FAQ
The newest 7Rs are coming through with white gears. The best way to tell at a glance would be the plastic clips that hold the case together. The #7 has clips and screws, the 7R just has screws. Also, the #7 driver has flat spots inside it and the 7R has a driver that is round on the OD and ID.
The #7and 7R have the same gears inside(Ratio) for all pinions however there are 4 different types of gears depending on production date. The 7R gears only work in 7R boxes. The #7 gears came in 3 versions. The newest had blue colored center gears and they will only work in boxes with blue gears. The all white gears in the #7 come in two versions: New (coarse tooth) and old (Fine tooth) They are all interchangeable as long as they are changed as a set. The final ratios in ALL cases are the same. Ratios are changed by the pinion count only.
PHEW!





********************************
The truth of the matter is, there is NO info on the 7R gearboxes in the gearbox thread. We,as a group, know very little about them.
It just so happened that I came across a 16t 7R today!



THE 16T PINIONS ARE THE SAME! 32p. The difference seems to be the plastic collar that centers the motor. It has a different diameter.
The case is similar but does not have the plastic latches. Thay are not numbered anymore.....completely anyway. They are broken down into groups by a dimple on the case (like the old MF gbs) 13-14, 15-16-17,18-19-20, and 21-22-23.
Not sure if they change gear sizes inside to make the 3 pinion sizes fit one case. I only have 1 16t to work with. I can tell you for a fact that the 4 gears inside are different that the old #7. The pin sizes and tooth sizes have been changed. Hopefully more will surface and we can finally get some 7R inside info in the FAQ
Last edited by taz11 on Tue Jun 14, 2011 4:57 pm, edited 1 time in total.
DRIVE IT LIKE YOU STOLE IT!..........Out of somebody's garbage
I'm trying to get out of PWs.........That idea's not working out real well......
My time on MPW is limited these days. I'm trying to check in everyday.....please be patient when awaiting responses.
https://www.facebook.com/Team-TAZ-Motorsports-924806427627096/
I'm trying to get out of PWs.........That idea's not working out real well......
My time on MPW is limited these days. I'm trying to check in everyday.....please be patient when awaiting responses.
https://www.facebook.com/Team-TAZ-Motorsports-924806427627096/