Three different steel gearbox tunnels were used on TR2-3B 900392, 560012 and 901550 depending on gearbox casing employed. We can supply second hand original steel parts plus aluminium and fibreglass reproductions.
Original parts.
900392 with a small bulge on RH side to accommodate bomb type starter motor TR2
560012 with a large bulge on RH side to accommodate Bendix type starter motor TR3A
901550 with a large bulge on RH side to accommodate Bendix type starter motor TR3A but with hole on the top for access to the gearbox dipstick deleted.
We can supply
901550SH Second hand steel gearbox tunnel. We keep all second hand gearbox tunnels under this part number
901550FG Fibreglass gearbox tunnel
901550AL Aluminium gearbox tunnel. Made to special order.