Thread: Suitable Rubber mounts for Axle attachment to chassis

rmw, Yes, since I know what the gear forces are, I can apply the resulting bearing forces to the housing due to the transmission of this high torque via the gear train. Cheers Ed

( OK In my opinion your worst case scenario will be a loss of traction at full throttle somewhere near maximum torque in low gear allowing the rpm to flare up to rev limit, then a sudden regain a lot of traction pulling the engine suddenly back to somewhere near maximum torque. You will be subject to the torque and the inertia of the drive line. If you have the polar moment and the speed change and time taken, you should be able to calculate...

( Uh-oh.   , )

Shock load should certainly be considered unless you want your axle to break off the first time the vehicle hits a bump. P.S. this is one of the functions of "suspension".

( FEA? real men use free body diagrams. I think you are talking about mounting the differential in an independent suspension to the chassis. If so you can ignore the static mass of the diff, but suspect\(that is i know damn well\) that the shock loads in the driveline will be more than the stall torque of the converter. Howver the rubber mount manufacturers are not idiots and usually spec their components to handle a bit of unintentional...

An any road condition military vehicle will likely see a lot of abuse shich will mean high levels of shock loads. Besides accounting for large shock loads I would also make sure that you could destroy or pound apart this rubber bushing/mount without the axle falling off. I think you'd call this a captive bushing or captive bushing mount.  

And, while Pat has adequately described a worst case scenario, every application of torque through the diff will cause it to want to react so you are looking at torque reaction forces each time power is applied, however that might be and in which ever direction that might be. rmw