We have just acquired a 1994 allegro bay diesel pusher on a oshkosh chassis. I am wondering if manufactured by companies other than tiffan would use the same chassis? My motor home has ford steering and ford relays in fuse box, The brakes are 4 discs with a bendix master cyl and one rear axle. Rear engine is a cummins with allison transmission.I ordered a manual from freightliner gave them the s/n They sent me a manual for 1997 to 2000 nothing is the same as my unit.I would like to get a copy of a service manual so how any suggestions? Stu and Sharon