Autoenginuity scan tool youtube11/11/2022 ![]() ![]() ![]() Re-post when you have had this done and I'll take another look. I would recommend getting the fault memories of the vehicle (not just the SMG) read to see if a broken spring is a likely candidate. In my experience this can cause fault codes in the SMG control unit that describe (can't remember exact wording) 'overshooting gear selection' or 'pushed too far'. Set your own ranges and alarms and even pick your own colors Once youve got a screen configuration that works for you, save it with a couple of keystrokes. As mentioned above this spring can break causing the SMG system to become confused when it attempts to disengage 2nd gear. Autotap OBDII scan tool comes with all the cables and interface that you need to connect to your Chrysler, Ford & GM OBDII Vehicles. So the selector rods have notches cut into them into which a ball bearing, aided by a spring, will locate. Changing a gear involves a very precise movement of the selector rods - in other words they can be pushed too far by the shift unit (or gear stick if manual). And like most manual units has long selector rods attached to forks that change the gears. The SMG 2 gearbox in your M3 is literally a manual 6 speed unit with a shift unit bolted on the back (unlike SMG 3 which is a purpose built unit). I have repaired faults almost identical to yours caused by a broken selector rod detent spring - part cost £4! I believe that the last is the most likely given the scenario. So in my experience you're left with a few possibles ![]() It is designed for heavy duty vehicle makes and models with J1587 / J1708 Data Links. Low SMG fluid though, would manifest itself in gearshift problems in all gears most of the time - but check it anyway as a precaution. Truck Diagnostic Scan Tool - Call for Pricing & Availability The MD-200 series tool is a rugged, handheld device that is capable of providing several diagnostic functions to assist in the diagnostics of todays electronically controlled truck components. What is possible however is that the SMG hydraulic fluid level is low through a leak in the system. If this was a gearbox oil quantity issue then your gearbox would most likely be scrap by now. Ok, firstly I don't think that it's low gearbox oil. ![]()
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