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Allison 1000Transmission Re-Learn Re-Learn is required when replacing the transmission, working on the transmission,
installing a Shift Kit or adding horsepower. The computer that controls the Allison
1000 transmission has adaptive strategy that constantly adjusts shift clutch
pressures to match engine torque and vehicle load. It stores a database
and records the relationships between rate of acceleration and throttle
opening. It also calculates engine
torque output based on inputs such as fuel consumption, boost pressure, air
density, temperature, throttle position and many other factors. To
insure an ideal shift with maximum speed and minimal strain on the drive
train the computer must ‘re-learn’ when replacing the transmission, working
on the transmission, installing a Shift Kit or
adding horsepower. Start the re-learn by making at least six sets of light throttle upshifts through all the gears, then make another six sets at 1/3, 1/2 and 3/4 throttle. Downshift the same way by starting at light throttle and working up to full throttle. When the shifts are quick and smooth press the ‘tow haul; button and repeat the previous re-learn process in ‘tow haul’ mode. Re-learn normally takes up to two hours (this time can be significantly reduced by using Tech2 or PC based Allison software to clear the memory and place the TCM in the ‘fast learn’ mode). During
the relearn there will probably be some clunks, bumps and/or short flares,
especially during the 3-4 shift.
This is normal.
Extreme Duty Allison 1000 Tow Matrix transmission Extreme Duty Tow Matrix torque converter
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TRANSMISSION EXCHANGE CO is located at 1803 NE MLKing Blvd., Portland, OR 97212. Ph. 503-284-0768, 800-776-1191 Fax 503-280-1655 E-mail mail@txchange.com
