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rotorwrench · 09-16-2018, 10:35 AM

If you change ratio of final drive. Make sure it affects the front and rear axle alike. This requires the gear change box to be between the engine and the transfer case. I can't really tell if the underdrive is placed that way or not due to the photo not showing placement well enough. If it is only placed in the rear drive then it can only be operated while the front axle is disconnected for rear wheel drive only. Both axles have to go the same speed. I know that Marmon Herrington added in a slip ratchet set up in the front axle drive with a lever to operate it but there is no way to lock out the front axle hubs like a later model 4WD vehicle.

09-16-2018, 10:35 AM	#33
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,436	Re: 43 Marmon Herrington 4x4 top speed If you change ratio of final drive. Make sure it affects the front and rear axle alike. This requires the gear change box to be between the engine and the transfer case. I can't really tell if the underdrive is placed that way or not due to the photo not showing placement well enough. If it is only placed in the rear drive then it can only be operated while the front axle is disconnected for rear wheel drive only. Both axles have to go the same speed. I know that Marmon Herrington added in a slip ratchet set up in the front axle drive with a lever to operate it but there is no way to lock out the front axle hubs like a later model 4WD vehicle.