LAND ROVER / RANGE ROVER 4 and 5-SPEED TRANSMISSIONS
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GM V8 ENGINES To RANGE ROVER / LAND ROVER ZF 4-SPEED AUTOMATIC TRANSMISSIONSMarks 4WD Adaptors manufacture engine conversion kits to allow the fitting of Chevy V6 and V8 engines to the standard Range Rover / Land Rover 4 and 5-speed transmissions. These engine conversion kits will also suit Land Rover 109" and 110" wheel base including the Land Rover Defender and the Discovery fitted with the Rover alloy V8 engine. Kits are also available to suit the factory 4-speed automatic transmissions. |
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Front Springs The front coil springs on the Range Rover / Land Rover will need to be upgraded as the cast iron GM engines are heavier than the alloy Rover V8 engine. Engine Kit The GM V8 engine kit consists of an adaptor plate that bolts to the rear of the engine. The standard Range Rover / Land Rover V8 bellhousing then bolts to the rear of the adaptor plate. The transmission does not need repositioning for this conversion as the GM V8 engine has similar external dimensions as the Range Rover / Land Rover V8 engine. A spigot bush, spigot bush adaptor, bellhousing cover plate and all the required bolts are supplied with the kit. Engine Mounting Engine mounting kits are available to suit GM engines. The engine mounts have been designed to bolt to the side of the GM engine and then bolt directly to the original Range Rover V8 pre 1996/ Land Rover V8 pre 1999 engine mounting rubber and chassis bracket. The original chassis mounts do not require relocation. The engine mountings have been designed to give you sufficient legal sump to differential clearance when used with a standard GM rear drop sump. Flywheel The original GM flywheel and starter motor are used for the conversion. The bellhousing will need to be modified to allow the starter motor nose to clear. If a hi-torque starter motor is used the bellhousing modification can be minimised. When fitting Chevy petrol engines the smaller 10.5" 153 tooth flywheel must be used as the larger 11.0" 168 tooth flywheel will not fit inside the original Range Rover / Land Rover bellhousing. Most Chevy petrol engines imported into Australia were originally fitted to automatic transmissions. Marks 4WD Adaptors manufacture flywheels to suit these engines. The engines are externally balanced with counter weights fixed to the flex plate. The new flywheel fits behind the flex plate, thereby retaining the correct engine balance. Six new bolts supplied in the kit secure the flywheel and flex plate to the crankshaft, along with 3 new bolts to secure the flex plate to the rear of the flywheel. The flywheel has the same off set as the standard GM flywheel and has been drilled to accept the 10.5" flat fingered diaphragm clutch kit or the original Rover clutch. Clutch Options A standard 10.5" GM clutch kit can be used with the Range Rover / Land Rover 4-speed transmission as the clutch spline is the same (10 tooth). A 10.5" GM clutch pressure plate and Rover 5-speed clutch plate can be used with the Range Rover / Land Rover 5-speed transmission. A Range Rover / Land Rover clutch kit can be used but the GM flywheel will need to be re-drilled and taped to accept it. |
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RANGE ROVER / LAND ROVER ZF 4-SPEED AUTOMATIC TRANSMISSIONS
Back to CHEVY V6 and V8 ENGINES to LAND ROVER / RANGE ROVER 4 and 5-SPEED TRANSMISSIONS
| Marks 4WD Adaptors manufacture a range of engine conversion kits to allow the fitting of Chevy V6 and V8 engines to the standard Range Rover / Land Rover ZF 4-speed automatic transmission.
The front coil springs on the Range Rover / Land Rover will need to be upgraded as the cast iron GM engines are heavier than the light weight alloy Rover V8 engine. Engine Kit The GM V8 engine kit consists of an adaptor plate that bolts to the rear of the engine. The standard Range Rover / Land Rover V8 bellhousing then bolts to the rear of the adaptor plate. The transmission does not need repositioning for this conversion as the GM V8 engine has similar external dimensions as the Range Rover / Land Rover V8 engine. The transmission torque converter is coupled to the flywheel via a crankshaft adaptor. The adaptor has the Rover flex plate bolt pattern and spigot diameter on the transmission end with the GM crankshaft bolt pattern and spigot diameter on the engine end. This allows the Rover flex plate and torque converter to be bolted to the rear of the crankshaft adaptor, same as the old Rover V8 engine. On the front of the crankshaft adaptor a flywheel is used instead of a flex plate, as there is no provision to support a flex plate when the starter motor is engaging. Note 1: Late model 4.0ltr and 4.6ltr Rovers from 1996-2000 with the Borg Warner transfer case have a different flex plate bolt pattern and torque converter, they need to be replaced with one from an earlier model fitted with the LT230 transfer case, this will enable the use of our kit. Note 2: Range Rovers and Land Rovers fitted with the Borg-Warner viscous transfer case built between 1989-94 also have a different flex plate, torque converter setup and will not fit our adaptor kit, you will need to purchase a flex plate and torque converter from a vehicle fitted with the LT230 transfer case. When ordering the Chevy kit you must make sure that the GM starter motor is the correct type. Chevy V8 engines were released with two flywheel and flex plate sizes; they where fitted with a 153 tooth ring gear or 168 tooth ring gear, as a result two starter motor offsets are available. You must use a 153T flywheel with this kit. It will also be necessary to identify the year of the engine, after 1986 the engine crankshaft, bolt pattern changed. The bolt pattern is smaller as is the spigot diameter, which locates the flywheel to the crankshaft (52.4mm). The post 1986 Chevy small block engines are also externally balanced. One way to identify a late model Chevy engine is by the one-piece external, rear main oil seal. As the original GM flywheel and starter motor are used for the conversion. The bellhousing will need to be modified to allow the starter motor nose to clear. If a hi-torque starter motor is used the bellhousing modification can be minimised. Engine Mounting Engine mounting kits are available to suit GM engines. The engine mounts have been designed to bolt to the side of the GM engine and then bolt directly to the original Range Rover V8 pre 1996/ Land Rover V8 pre 1999 engine mount rubber and chassis mount. The original chassis mounts do not require relocation. The engine mountings have been designed to give you sufficient legal sump to differential clearance when used with a standard GM rear drop sump.
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GM ENGINE TO ZF 4-SPEED AUTOMATIC CONVERSION KITS
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Marks 4WD Adaptors 
Last modified:
October 30, 2009
