Index to articles on the Vitesse gearbox
News of the availability of the Vitesse Mazda gearbox as a replacement for the MGBGTV8 was seen in early 2017. An article with information was released promptly. Clearly the high torque characteristics of the MGBGTV8 and the in service experience with the replacement Vitesse gearbox is a natural concern. Christian Disney at Vitesse provided comparative data for a number of the cars using the Mazda gearbox. Then fellow V8 member Ashley Vane produced an article setting out his expereince with a replacement Vitesse gearbox fitted to his MGBGTV8 in November 2016.

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Updated: 181105

Information on the replacement Vitesse gearbox on the V8 Website

Replacement 5-speed Mazda gearbox
Peter Berry relates his experience with replacing his original MGBGTV8 gearbox with a 5-speed Mazda gearbox from Vitesse. He was pleased with the resuly. 181105 More

Gears without fears
East Anglian V8 Burbler, Ashley Vane, says “you've no doubt seen all the advertising and articles in various MG magazines recently about the Mazda 5speed gearbox conversion, well from some one who has made the "change" I can thoroughly recommend it as money well spent”.170202 More

Vitesse gearbox in other classic cars
Christian Disney, Business Development Manager at Vitesse, provided some information from the other applications of their replacement Mazda MX-5 gearbox saying "BBR produce factory endorsed, warrantied turbo upgrades for the MX-5, producing 302 bhp @ 7350 rpm, and 254 lb.ft of torque available @ 4950 rpm. This conversion demands an uprated clutch, but the standard transmission is still used with no issue. We supply Caterham with their 5 speed gearboxes and they use it in their 620s (supercharged 2.0L Ford Duratec producing 310bhp, 219lb.ft) with no issue. They have done thousands of miles of road and track testing. It's a lighter car but with 215-section ZZR rear tyres it will have significantly more traction than an MGB with 185-section road-biased tyres, meaning the powertrain will be stressed more in that application despite the lower torque figure.

Morgan Motor Company take our gearbox for their 4/4, Plus4 and Three Wheeler models. The 2.0L V-twin in the Three Wheeler delivers torque in one big lump that stresses all components, but we have had no issue with the gearbox! Our own development car, a 4.0L V8, has covered a few thousand (mainly spirited) miles and we have not had a single problem with the gearbox. Safe to say, we are very confident that the Mazda gearbox is a great unit that is more than strong enough for the V8 MGB."

The torque data has been used to create a table which shows the comparison more easily. Torque data table

Replacement 5 speed Mazda gearbox now available for an MGBGTV8
What is the Vitesse Mazda based replacement 5 speed gearbox kit like, how do the ratios compare with those of the original 4 speed box with overdrive on top gear, how does it perform, what does the installation involve and how much does it cost? Our article has the news. 170116 More & Article

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