Use Caution With Toyota Transmission

Aug. 15, 2022

Toyota provides cautions when installing an automatic transmission/transaxle to avoid MIL-on, shifting issues and/or transmission damage and has a list for consumers to confirm on their Toyotas. 

This bulletin applies to all 1990-2019 Toyota vehicles equipped with an automatic/continuously variable transmission. Toyota provides cautions when installing an automatic transmission/transaxle to avoid MIL-on, shifting issues and/or transmission damage.

Confirm the following:

- Both alignment pins are present on the engine block.

- ATF lines and cooler have been flushed with the appropriate type of ATF. Note: continuously

variable transmissions require CVT fluid when flushing.

- Correct torque converter bolts and washers are used. Note that not all applications will use


- All ground straps are in the correct locations and are connected properly.

- Correct shift cable adjustment.

- Correct Park Neutral position switch adjustment.

- Transmission fluid level set correctly.

- Transmission learned values have been reset and/or the compensation code has been input (if

applicable) and proper initialization has been performed.

- Transfer all plastic/rubber shipping plugs from the reman transmission to the corresponding

holes on the core.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

About the Author

Mike Mavrigian | Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of  specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.

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