Hi all,
About 6 months ago I noticed a change in the effectiveness of the overdrive on my BT7. When I flick the switch I can hear the overdrive engage and the revs drop, but only very slightly (perhaps 100-200 rpm). Previously the drop in revs was very noticeable both in the engine pitch and the on the rev counter (500-800 rpm). Now there is very little change. A few months before I noticed this problem I had had the OD/Gearbox fluid changed using 20W50 engine oil.
Any ideas what might be going on or how how I could investigate the fault?
Thanks
Phil
About 6 months ago I noticed a change in the effectiveness of the overdrive on my BT7. When I flick the switch I can hear the overdrive engage and the revs drop, but only very slightly (perhaps 100-200 rpm). Previously the drop in revs was very noticeable both in the engine pitch and the on the rev counter (500-800 rpm). Now there is very little change. A few months before I noticed this problem I had had the OD/Gearbox fluid changed using 20W50 engine oil.
Any ideas what might be going on or how how I could investigate the fault?
Thanks
Phil