| 5 speed conversion kit for Austin Healey Sprite/MG Midget/Morris Minor | |||
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Introduction |
Contact Me for more Information and Availability |
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Using the Datsun 210 4 or 5 speed transmission, this kit will allow you to make a turnkey installion in your Sprite Midget or Morris Minor. (or any other in-line A-series engine powered car like the Austin A30/35 or Austin A40 Farina) This design has it's legacy in the original Morriservice kit, originally conceived for use in the Morris Minor. The original design was conceived by Bruce Wyman and subsequently improved significantly by Paul Asgeirsson after he took over Morriservice from Bruce and moved Morriservice north to Portland Oregon from Redwood Cty, California. Later, due to the similar drivetrain in the Sprite and Midget, it has been popularly used in those as well. The Morriservice design is considered by many ethusiasts to be a superior design over the Rivergate product and easier to install. I have made a number of subtle improvements in the current iteration that should make installation even smoother and easier. I have seen it written that the Morriservice 5 speed conversion "came later", but indeed, just the opposite is true, and was actually conceived in the late 70's In addition, by following my recommended installation procedure, modification of the heater plenum in Spridget models is not required. Depending on which car you are upgradiing, the kit will include some or all of the following as necessary. The Spridget kit includes:
Optional items
Transmission required is 1979-1982 Datsun 210 (not the same as B210 ) |
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| Slave mounting cradle | Adapter Plate | ||
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| Contact Me for more Information and Availability | Adapter plate shown above left and above with optional seal kit | ||
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| 1275 Rear seal installed (shown with optional 5 speed kit) | 1098 Rear seal installed (shown with optional 5 speed kit) | ||
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Which would you prefer? ^ |
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* A Word about Seal KitsThe original BMC rear engine seal design for in-line A-series engines is what is called a "scroll seal". Simply explained, there is a helical groove at the rear of the crankshaft that will throw oil back towards the internal engine while the crankshaft spins. A vertical flange called a slinger, acts as both a barrier and a means to divert oil from it's natural path as it tries to exit the rear main.  |
In TheoryIn order for this system to work properly, it is of primary importance that the engine be in decent operating condition, properly vented, and be accompanied by vacuum pressure and a PCV. Often, if these conditions are met, the original design is sufficient. However, sometimes these engines aren't built with the correct tolerances to make this system work 100% of the time. Hence, the rear lip seal kit has been designed to help out as a substitute. Even with the lip seal, it is still important that that the vent and vacuum conditions be observed. Unfortunately however, one of the weaknesses in the lip seal retrofit design has been, the replacement half moon seal that is supplied with the kit. Because it does not follow the original design concept to take advantage of the original scroll seal design desribed above, it instead relies entirely on the lip seal to retain the oil. The Big DifferenceMy seal kit is different. Instead of depending entirely on the lip seal, it incorporates a half moon seal that takes advantage of the original scroll seal design and has the added benefit of the lip seal as a back up. This design incorporates several improvements and is not available elsewhere.
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| How an Archimedes screw works to move fluids. | |||
Optional Clutch kit
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Each plate is serialized |
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Optional Gaiter Ring >>>Aluminum Gaiter ring for use with vinyl gaiters found in post 1972 Midgets An exact replica of the stamped steel ones are NLA and sometimes needed with you modified shifter that won't clear the "can"
Available pre-drilled or blank. |
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Kit mounted on 1275cc engine with Datsun 7" Clutch kit. |
Testimonials: "The parts look very well made. Talented welder on the transmission mount." Leroy V. - Illinois -------------------------------------------- "I'm truly impressed in it's precision fit and finish- heck it even looked good! In addition a speedometer cable connection that he has perfected allows the speedometer to work for the first time in probably thirty years." Dr. Mark M. - San Francisco, CA --------------------------------------------- "I am impressed with the machining of the rear engine plate." Jim S. -Texas --------------------------------------------- I'm very impressed with your kit! Easy to install. John's British Car Garage - Reno NV --------------------------------------------- First I'd like to say your kit looks terrific. I went through everything and it looks like this will be a pretty slick installation. David T. NH |
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Basic Morris Kit 
How to ID the correct transmission 
