Originally Posted by chianesi
Yes the tranny shifts into reverse just fine, pretty smooth actually. In further testing, the tranny WILL shift into second but NOT into third. If I were to guess at the dipstick marks, I think the tranny has about 1 qt. too much fluid. One more thing, when I was checking the engine over I noticed that the radiator in the blazer must have come from one with a manual tranny cause the two cooler lines that are supposed to connect to the radiator are connected to each other with a piece of rubber hose, so much for cooling the tranny
IF 1st and 2nd gears are operating , NO 3rd or 4th gears would indicate the 3-4 clutch pack is the problem.
The 3-4 clutch pack in this tranny has been a weak point since the tranny was introduced in the 1980's.
You have not indicated a mileage figure on the vehicle?