Performing A Fast Learn On An 8l90 6l80 Gm Truck To Fix I go through the transmission fast learn relearn procedure to fix a hard shifting issue on my 2016 gmc sierra silverado. most of your high end scanners c. Fast learn basic requirements and when how it should be initiated. fast learn should be initiated after any type of transmission repair. this includes a transmission flush with new atf, provided the flush is to correct tcc shudder or slip. the temperature must be at 167°f (75°c) and 185°f (85°c), but it also depends on current tcm programming.
Maxisys Ms906 Pro Diagnostic Tablet вђ Car Diagnostic And Programming This will power down all modules. then perform fast learn. start cold and power torque in reverse for quickest warm up to 75c or a few degrees below. then put in drive. don't let off brake until complete. i've seen temps over shoot range and abort. have had to run with external fan on some too cool to prevent overshooting temps during fast learn. Fast learn. fast learn is a scanner driven function. doing a fast learn erases all the adapt shift values and resets them to default, baseline values that must be relearned. a fast learn must be performed whenever the transmission is replaced, or rebuilt. it also must be performed when changing the valve body or tcm. Available on all 2016 2018 my trucks, cars and suvs with 8l45 and 8l90 automatic transmissions (rpos: m5u, m5t, m5n, m5x). when the service fast learn is complete, perform a test drive and note any soft or harsh shifts. to improve these complaint shifts further, locate the clutches that need to be learned in the following table below, and. To learn c4 (for 1 2, 5 6, or 7 8 shift) 1. pressure learns: note: it is recommended to utilize a road with a speed limit between of 64 72 km h (40 45 mph) for this procedure. • shift the transmission into 7th gear with the prndm in the m position. obtain an engine speed between 1000 and 1750 rpm.
Autel Maxisys Ms906 Professional Car Diagnostic Tool Review Obd Advisor Available on all 2016 2018 my trucks, cars and suvs with 8l45 and 8l90 automatic transmissions (rpos: m5u, m5t, m5n, m5x). when the service fast learn is complete, perform a test drive and note any soft or harsh shifts. to improve these complaint shifts further, locate the clutches that need to be learned in the following table below, and. To learn c4 (for 1 2, 5 6, or 7 8 shift) 1. pressure learns: note: it is recommended to utilize a road with a speed limit between of 64 72 km h (40 45 mph) for this procedure. • shift the transmission into 7th gear with the prndm in the m position. obtain an engine speed between 1000 and 1750 rpm. The 8l90 can be identified by the following rpo codes, m5q, m5x and new for 2019, mqe while the 8l45 is identified by the rpo codes, m5t, m5n. the tcm is a standalone delphi unit which is shared with several other gm applications such as the 9t, and 10l transmissions. the 8l90 8l45 transmissions utilize five clutches to provide eight forward. Before performing the procedure: always install the most recent gds2 (global diagnostics system 2) update. if the transmission fluid temperature isn’t between 75ºc (167ºf) and 85ºc (185ºf), the scan tool won’t allow you to perform the service fast learn procedure. here’s how to perform the adaptive relearn procedure:.
Autel Maxisys Ms906 Auto Diagnostic Scanner Autel Ds708 Update Version The 8l90 can be identified by the following rpo codes, m5q, m5x and new for 2019, mqe while the 8l45 is identified by the rpo codes, m5t, m5n. the tcm is a standalone delphi unit which is shared with several other gm applications such as the 9t, and 10l transmissions. the 8l90 8l45 transmissions utilize five clutches to provide eight forward. Before performing the procedure: always install the most recent gds2 (global diagnostics system 2) update. if the transmission fluid temperature isn’t between 75ºc (167ºf) and 85ºc (185ºf), the scan tool won’t allow you to perform the service fast learn procedure. here’s how to perform the adaptive relearn procedure:.
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