It basically consists of an epicyclic gear. Mine always worked quite well so I wasn’t expecting to find anything particularly out of order. It’s a Laycock J type used on many cars of the era.
#LAYCOCK OVERDRIVE PARS FREE#
Wishbone Classics has experience with all original transmissions and Laycock overdrives found in popular British sports cars. Additionally, if you have a standard MGB or Triumph transmission we can also convert these to overdrive specification for you. Need a fast road or competition transmission and overdrive? No problem, we have special purpose custom parts in addition to extra preparation services that will transform your original British sports car transmission into one that can handle the rigors of weekend track events or full-on competition use.Īll standard gearboxes built to better than factory specifications & tolerancesįast Road & Competition transmissions and overdrives availableĪll units dynamically tested, insuring problem free use for youĮvery gearbox rebuild begins with a complete tear down and inspection. We will not reuse any component that we don’t believe will service you for the future. Transmission cases receive a high pressure degreasing and are then cleaned on the interior and exterior with high pressure soda blasting. Soda blasting is a non-abrasive method of surface cleaning with the benefit that any remaining soda is dissolved during a final warm water rinse prior to unit assembly. Gears are treated similarly and for fast road and competition use the gears and shafts can be isotropic finished as a means of improving the components surface finish with a positive impact on reducing friction, heat and increasing the life of the gears. All transmission internals are mock assembled to check fit and clearances. Prior to final assembly, all internal transmission components are ultrasonically cleaned to insure maximum cleanliness. Once the gearbox was complete the overdrive was next up. We have been and continue to primarily be a Triumph shop, and currently our workshop is too busy to accommodate work for Austin Healey and MGs. TR6 four speed gearbox with J-type OD base rebuild pricing is $2999īare A-type OD base rebuild pricing is $1650īare J-type OD base rebuild pricing is $13: We are currently only rebuilding Triumph TR3B (four synchro) through TR6 transmissions and A and J type overdrives for Triumph TR transmissions. TR3B-TR6 four speed gearbox with A-type OD base rebuild pricing $3250 Standard TR3B-TR6 four speed gearbox base rebuild pricing $1599 Feb 2018: All gearbox and overdrive pricing has been updated to reflect current included parts pricing and included labor at our current labor rate of $100/hour (labor rate in place as of 2016).