The Ford Barn

IndianapolisRacer · 04-15-2018, 05:45 PM

I was cruising along Rt50 at about 2500 rpm when my Columbia overdrive shifted down on its own resulting in sudden drop in speed and a RPM increase to 3000 rpm plus a smell of burning clutch . Now when I release the clutch in first gear there is a momentary pause then a slight clunk as the car pulls away . I have removed engine and clutch and throwout bearing appear undamaged . The only thing I can find is a slight deformation of front engine mounting holes on front engine mounts to a slightly oval shape on the right side . The engine is an 8BA and the trans is a 1939 with Columbia rear . Trans shifts well in all gears so I am installing anti chatter adaptors on the front mounts thinking engine might be shifting forward slightly on initial 1st gear pull away , don't know what else to check !

04-15-2018, 05:45 PM	#1
IndianapolisRacer Senior Member Join Date: Sep 2011 Location: Olney , Illinois Posts: 222	Columbia overdrive issue I was cruising along Rt50 at about 2500 rpm when my Columbia overdrive shifted down on its own resulting in sudden drop in speed and a RPM increase to 3000 rpm plus a smell of burning clutch . Now when I release the clutch in first gear there is a momentary pause then a slight clunk as the car pulls away . I have removed engine and clutch and throwout bearing appear undamaged . The only thing I can find is a slight deformation of front engine mounting holes on front engine mounts to a slightly oval shape on the right side . The engine is an 8BA and the trans is a 1939 with Columbia rear . Trans shifts well in all gears so I am installing anti chatter adaptors on the front mounts thinking engine might be shifting forward slightly on initial 1st gear pull away , don't know what else to check !