Shop › 55707 Image 1 of 2 Image 2 of 2 55707 $5.00 Gearbox circlip, retaining 3rd gear to mainshaft. TR2-TR3-TR3A-TR4-TR4A-TR250-TR6. 55707, 326-035 Add To Cart Added! Gearbox circlip, retaining 3rd gear to mainshaft. TR2-TR3-TR3A-TR4-TR4A-TR250-TR6. 55707, 326-035 You Might Also Like Uprated Front Axle Kits from $135.00 Shift Boots, TR4-TR6 from $10.00 A-Type Overdrive Manual $20.00 Manifold Mounting, TR2 thru TR4A from $0.25 Lower Engine Sealing, TR2-TR3-TR3A-TR4-TR4A from $1.50