An MWR exclusive
Custom Monkeywrench Racing transmission built in-house using 100% brand new Toyota OEM parts.
This is a very special transmission
It will bolt right up to any 1ZZ or 2ZZ engine and is specially modified by MWR so that it may be installed in any 2003-08 Matrix, Vibe or Corolla. No adapters, other parts or or custom work of any kind are required for the installation. Works with stock or aftermarket clutches, flywheels, shifters, shifter cables, axles.
Performance and Value
You get a factory fresh 6-speed transmission; compare that to Toyota's retail price of over $2450 with no options for gearing or fitment!
Axle ratio is 3.941:1, so it is a very usable transmission for street driving and it works excellent with forced induction. Revs are considerably lower on the highway than they would be with a US market 4.5:1 Matrix/Corolla transmission (~3100 rather than 3600 at 80mph) so fuel economy is noticeably better. There is little or no penalty in acceleration times with supercharged or turbocharged engines though it will definitely slow down naturally aspirated cars. There can actually be an acceleration advantage for forced induction cars because the lower gears are much more usable and less shifting is required. Ratios are similar to the stock Matrix/Corolla 5-speed though they're spaced more closely for better acceleration.
Quality and strength
Built with 100% new OEM parts so it is as strong as an OEM transmission. MWR recommends a maximum of 275whp for road course use and 350whp for street use though actual transmission durability will vary based on usage, vehicle weight, torque, clutch type and heat. If you will be exceeding those numbers you should definitely consider stronger solutions such as Jubu or Kaaz gear upgrades or stronger transmissions such as the MWR dog box or Quaife sequential for road course use and MWR E153 swap for high power street or road course. Because of varying customer power levels and usages MWR guarantees only initial quality and function.
Final Drive: 3.941
US Matrix/Corolla 6-spd Ratios:
Final Drive: 4.529
US Matrix/Corolla 5-spd Ratios:
Final Drive: 3.941