To properly tune your diesel transmission you will first need the know-how and then the equipment to adjust your transmission modulator and your VCV transmission shift valve. This Kit will cover models 116 and 126 1978 to 1985 300SD, 1980 to 1985 123 240D and 1981 to 1985 123 Turbo 300D 300TD 300D 300CD
Kit includes all items listed below. To read more about each individual book / kits you can go directly to the following links:
Mercedes Diesel Automatic Transmission Peak Performance Tuning - NEW MANUAL RELEASE
Kent's full length troubleshooting manual on vacuum transmission testing and adjustment. His longest published manual to date!
Mercedes Diesel Automatic Transmission VCV Vacuum Controls Testing Kit
This unique kit will allow you to hook up a 30 in HG vacuum gauge between your vacuum control shifting valve (VCV) and your transmission modulator to test the VCV for proper function and to tune it for peak shifting performance.
Mercedes 61x Diesel Automatic Transmission Modulating Pressure Test Kit
Troubleshooting an annoying shift problem must first start with the vacuum modulator. This vacuum control unit mounted on the side of the transmission must be tested and adjusted to specs BEFORE you move on to other adjustments.
PLEASE NOTE: You will need a hand held vacuum pump tester to perform the diagnostics with this kit. If you do not already own one, We do sell the vacuum pump tester separately CLICK HERE to view!