I was driving yesterday and I was in 5th gear. All teh sudden I was not in 5th gear. I just swapped this engine in and put a Quaife LSD in the tranny and it has been working fine for about 7 months now. The tranny has 160k on it tho. I just started boosting about 3 weeks ago. I don't know if this has any impact on wearing my tranny out faster. When i swapped the engine and everything i also put in urathane motor-mounts. What do you guys think the problem is.
Thanks- Corey

 

could have a small tranny leak, could be low on fluid, could have a bad synchro.... 3 most common issues.

 

Synchro Spring