8:1 Conversion and Overdrive question

[Donnie]

Roverdrive bolts to the back of the transfer case same as Fairey and other overdrives. Remove the mainshaft gear for transfer box and insert Roverdrive (basically) and bolt it up. Reduces engine RPM by 28%.

I understand the Fairey as I have had a few apart. Let me restate my question, prefaced by the facts as I see them: The Roverdrive uses a planetary gear train, not a countershaft system. I'm sure that they are using a planet system from another unit & my question should have indicated that, sorry. Does anyone know what gear train they are useing, like from what tranny ?

[redmondrover]

R380

We are getting the R380 (50a suffix L and the 5 speed kit) from Ashcroft along with their adapter to mate it to a Series transfer case. It did not sound like we got the last one...

[greenmeanie]

IIRC I've heard that its a modified form of TH400.

[Eric W S]

We are getting the R380 (50a suffix L and the 5 speed kit) from Ashcroft along with their adapter to mate it to a Series transfer case. It did not sound like we got the last one...

Short bodied R380's are rare. Ashcroft rebuilds them so I would expect them to have a few in stock.