First upshift with a bump


#1

I have Mazda 6, 2004. For about a week now the first upshift (1->2) after cold start, sometimes even second one (2->3) happens with a “bump”. Any ideas?


#2

How many miles?? Is the check engine light on?? Has anyone scanned it for codes??

transman


#3

The first step is to check the fluid level and condition.


#4

33000, no engine check light (it means there are no codes to scan, right?). Thanks for replying! It seems like this first 1->2 shift happens at lower RPMs than it does after I drive for a while. Need another cold start to verify.


#5

fluid level is good, color too, thanks for replying!


#6

Make sure it isn’t overfilled with transmission fluid. Check it according to the owner’s manual. Old transmissions in cold, cold weather (GM turbo 350) can shift hard like that.