Still plugging away here.
As soon as we hear back from my Uncle (as to whether or not we can do this at his place or not), I'm going to be rebuilding the transmission in my Mom and Dad's old Suburban.
The issue was pretty easy to diagnose, really. Shifts from 1st to 2nd just fine, but once it hits 3rd the engine takes off like it suddenly went into Neutral instead.
In the 4L60E automatic transmissions, this means pretty much one thing: a burned out clutchpack - specifically the one for gears 3 and 4. The reason this happens is because the materials used back then (the Burbie is a '93) are nowhere nearly as good as the materials used now. So, what happens is that over time, the piston for the 3-4 clutchpack wears out and lets fluid blow by. Which means there isn't as much pressure being applied to the clutchpack when it's supposed to be engaged, thus letting it slip and eventually burn out.
Fortunately, the rebuild kits have parts made with much sterner stuff, and the ones intended to replace the 3-4 piston also come with pretty much everything else you might want to replace while you're that deep into the thing. Once I'm done with this, the transmission should never give us any trouble again.
Provided we properly maintain the thing, anyhow. After all this, though, my folks are gonna be on top of it. No more rebuilds for us, thank you very much.
As soon as we hear back from my Uncle (as to whether or not we can do this at his place or not), I'm going to be rebuilding the transmission in my Mom and Dad's old Suburban.
The issue was pretty easy to diagnose, really. Shifts from 1st to 2nd just fine, but once it hits 3rd the engine takes off like it suddenly went into Neutral instead.
In the 4L60E automatic transmissions, this means pretty much one thing: a burned out clutchpack - specifically the one for gears 3 and 4. The reason this happens is because the materials used back then (the Burbie is a '93) are nowhere nearly as good as the materials used now. So, what happens is that over time, the piston for the 3-4 clutchpack wears out and lets fluid blow by. Which means there isn't as much pressure being applied to the clutchpack when it's supposed to be engaged, thus letting it slip and eventually burn out.
Fortunately, the rebuild kits have parts made with much sterner stuff, and the ones intended to replace the 3-4 piston also come with pretty much everything else you might want to replace while you're that deep into the thing. Once I'm done with this, the transmission should never give us any trouble again.
Provided we properly maintain the thing, anyhow. After all this, though, my folks are gonna be on top of it. No more rebuilds for us, thank you very much.