[rhaigh08]

I have heard that alike ATF can be mixed. However myself I would not do that because no two fluids are the same. Some add more detergent some add more lube. Have you checked your fluid levels with the engine running and in neutral with the parking brake on? That is a good way to check it. The levels should be right in between add and full as I'm sure you know, But I have to say it. The smell is burning transmission fluid that means something is wrong in the transmission, that is one of the many smells you dont want to smell comming from your car. Rubber is the best way to describe it. That could be from having too much fluid in there which could cause more extensive issues like blown solenoids, broken rings around the pistons in the trans because, with age they crack too much fluid can add extra pressure on them and other parts and they break then fluid gets where its not supposed to and can burn off in those places. You deffinately should get any extra fluid out right away and should not drive it until its at it's proper levels to prevent any damage or further damage. Some transmissions run very normal with extra fluid in them and sometimes never even cause a problem. However these transmissions are very delicate. 4T65E transmissions are a nightmare to have rebuilt and simple mistakes can cost you big. My 2002 Intrigue just went in for the 8th time on Friday for a shifting issue after 3 rebuilds (thankfully I only had to pay for one due to an awesome warranty and shop) and several random parts replaced between rebuilds. This time I got lucky no internals were messed up and I just have to have my computer flashed by the dealer to fix random shifting issues.