ALRIGHT I BOUGHT A 95 4X4 BLAZER AT A REPO SALE IT RUNS GREAT BUT IT LEAKED TRANNY FLUID OUT FROUNT SEAL SO I PULLED TRANY PUT IN NEW SEAL AND PUMP BUSHIN FOR CONVERTOR AND A NEW FILTER. INSTALLED BACK IN TRUCK WITH NO LEAKS BUT IT WILL NOT SHIFT INTO 3RD IT GOES 1 TO 2ND FINE NO SLIPS BUT IT NEVER GOES FROM 2ND TO 3RD I TRIED TO SHIFT IT MY SELF BUT WHEN I GO FROM 2ND TO D IT STILL STAYS IN 2ND . PLEASE HELP IF YOU CAN IM GOING TO PULL PAN TOMARROW MAKE SURE I DIDNT KNOCK A WIRE LOOSE WHEN I CHANGED FILTER.

 

all looked good in pan now looking for speed buffer any help?

 

There are shift solenoids in the trans that can be seen with the pan off. Might be one of those. I priced them a while back and I could get all three for around $100 at Advance. Might be worth a shot.