Triumph TR7 Propshaft and Fittings - 4 Speed and Early Auto
REAR AXLE & RATIO IDENTIFICATION
The axles & differentials listed in this section, are as originally fitted by the factory to all 4 speed Manual and all Automatics up to VIN402000.Axles for vehicles with 4 speed manual gearboxes are prefixed 'CG’ (diff ration 3.63:1), and automatic’s are prefixed ‘CT’ (diff ratio 3.27:1). Original factory replacement Differential units were supplied with either ‘collapsible’ or ‘non collapsible’ type spacer. Factory specification changes were made (at axle numbers CG51494 & CT2054) to the diff’ carrier & planet gear etc. so if you are considering re-building your own differential, note that early components cannot be interchanged with the later specification parts. However, if replacing the diff’ as a complete unit, then either type ay be fitted to the axle casing.
Auto to VIN 402026
Re-fitting the 4 speed Propshaft
As recommended by British Leyland, when replacing or re-fitting the propshaft on vehicles fitted with 4 speed manual gearbox, the propshaft should be 'reversed', ie CB joint to the rear axle.