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Triumph TR8 Transmission & Axles |
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Page Contents
TR8 Transmission Details V8 Gearbox - 5 Speed (Heavy duty)
©Rimmer Bros Ltd - Registered in England No. 2155394. VAT No. GB 352 8473 40.
V8 Gearbox - 5 Speed (Heavy duty)
V8 Clutch Housing/Operation
V8 Speedo Cable & Drive
V8 Propshaft & Fittings
V8 Rear Axle
V8 Differential Gears
In this TR8 Transmission & Axles section, apart from listing parts/components that relate solely to the TR8, we have also listed a 5 speed (heavy duty) gearbox, and rear axle units, that you may wish to consider fitting when converting your TR7 to TR8, especially if you are fitting or have fitted 3.5/3.9 performance engine/parts.
Although you can re-use your existing TR7 5sp gearbox in the TR8 conversion, we offer a Heavy Duty V8 5sp gearbox which is a more robust unit to cope with the power increase. Please refer to main TR7 5 speed gearbox section for all gearbox internals, gear selector shafts & gearchange not listed here.
Gearbox-Heavy Duty (5 Sp) (Recon) - UKC9076RHD
Supplied Less bellhousing, speedo pinion & gearchange remote assembly.
Gearbox Mounting (TR8) - (NI) -
TKC2642
Original TR8 Spec, harder than standard.
Gearbox Mounting (TR7/8) - (NI) -
TKC1044
Standard TR7 Specification.
Unipart Gear Oil (ATF) (0.5 Litre) - (NI) -
GGL175
Gear Oil (ATF) (5 Litre) - (NI) -
RX1343
Gearbox capacity - 1.5 Litre.
Bellhousing - FRC133
Bolt Kit - (NI) -
RB7130
Bellhousing to Block/Gearbox. Includes all bolts, nuts, washers marked '+' and '* '.
Bolt+ (6) (2" long) - BH505161
Bolt+ (2) (2.75" long) - BH506221
Washer-Spring+ (8) - GHF333
+Bellhousing to cyl' block.
Setscrew* (4) - SH112301
Washer-Spring* (4) - WL112001
Bolt* (2) - BH112091
Washer-Spring* (2) - WL112001
Washer-Flat* (2) - WA112081
Bolt* (2) - GHF135
Washer-*Flat (2) - WC110061
Dowel* (2) - UKC25
*Bellhousing to gearbox.
Clutch Operating Lever (TR7/TR8) - LBU1234
'Slipper' Pad (TR7/TR8) - 159003
Clip (TR7/TR8) - UKC1806
Clutch arm to slave cyl push rod.
Fulcrum Pin/Bolt - UKC13
TR8 spec, use if converting TR7 5sp gearbox.
Dirt Shield-Lower - FRC142
Setscrew (4) - SH106161
Washer (4) - WL106001
Setscrew (2) - SH505051
Washer (2) - GHF332
Clutch Release Bearingl - GRB209
Carrier-Release Bearingl - FRC5368A
lFor original Non self centering type clutch.
Clutch Release Bearing & Sleeve n - (NI) -
GRB90247
nFor self centering type clutch only.
Please refer to main TR7 5 speed gearbox section for speedo drive housings/seals not listed here.
Speedo Cable;
Converted TR7 - (NI) -
GSD287
Speedo Worm Drive Gear (Manual only) - (NI) -
TKC1274
Vehicles to 1981/VIN 402026.
Converted TR7 - (NI) -
GSD388
Vehicles from 1981/VIN 402027.
Original TR8 (LHD only) - (NI) -
GSD333
Located on mainshaft, colour code Black.
Speedo Drive Pinion;
Manual Gearbox (22 teeth) - 219003
'O' Ring/Seal - TRS1620
Manual Gearbox (Optional - 21 teeth) - 219002
Automatic Gearbox (24 teeth) - 219001
Housing/Bearing (Speedo drive pinion) - 22G1486
Oil Seal (Speedo drive pinion) - AAU2304A
Retaining Plate - 22G1711
Setscrew (for 22G1711) - SH106201
Washer-Spring - GHF331
Washer-Plain - GHF300
Propshaft (TR8) - RKC2890
Original TR8 spec, manual & automatic. Designed to be used with our original TR8 front subframe, which denotes engine/gearbox position relative to rear axle.
Bolt (8) - FRC90
Nut (8) - GHF233
Bump Stop (Propshaft) - UKC8268
Spacer (2) - UKC8413
Washer (2) - WC105001
Nut (2) - NY105041
Although you can re-use your existing TR7 5 speed rear axle in the TR8 conversion, we recommend fitting the TR8 axle (3.08:1 ratio), which will give you a more suitably geared vehicle. Please refer to main TR7 Rear Axle (5 speed) section for rear axle/differential components.
Rear Axle (Standard Differential);
Reconditioned, less half shafts.
Rear Axle & LSD (Limited Slip Differential);
3.08:1 Ratio - TKC3554R
3.08:1 Ratio* - TKC3554RNCWP
*Fitted with new crown wheel & pinion.
Recondioned, less halfshafts. Fitted with new Limited Slip Differential.
Unipart EP90 Gear Oil (0.5 litre) - (NI) -
3.08:1 Ratio (with LSD) - RB7111R
3.08:1 Ratio* (with LSD) - RB7111RNCWP
*Fitted with new crown wheel & pinion.
Rear axle capacity - 1.1 Litre.
Crown Wheel & Pinion (3.08:1 Ratio) - (NI) -
TKC2945
Gear set.
Limited Slip Diff' unit (Quaife) - (NI) -
RB7003
Return to TR8 Index Page 
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