hi guy s new to the site. hope all is well. allow me to tell you mystory. last month swapped my mk1 gti golf convertable. for an fto and had nothing but trouble from day one. the gearbox was knackered so i bit the bullet and had it replaced managed to find one locally. but it was a gpx not a gr so after some research found that this should not be a problem as long as the inner joints are changed as they ate 27 splines on a gpx and only 25 on a gr. box went in no bother. but think this box might be worst than the last one only get couple hundred meters along the rd and jumps in to safe mode. has to be restarted then does exactley the same. i have had it working in all gears but for a very short time. treid resetting ecu but no joy. any help would be greatley appreciated. need a good dignostic guy in scotland. please help as i really dont want to piss another 600 bucks of hard earned money away. cheers bob

There could be a fault with the TCM (transmission controle module) and possibly nuthin wrung with the transmission at all , nor the original transmission. I have seen this in sum 1992- 1995.5 Galant GSR , Mirage Asti , Lancer GSR and other models with INVECS (Tiptronic/Sportronic/Steptronic is part of INVECS I and II) and a handful without it also but auto gear boxes. This could be yur issue. Transmission shift lockout can be caused by a few things , Bad TCM , bad input or output speed sensor , pressure control in the valve body , bad TCM power supply

nice one , will pass on to my new bestfriend (my mechanic brother in law lol) and see how we go thanks for help

No problem at all. hoe it gets sorted out