K5_489
Member
- Joined
- Dec 11, 2019
- Posts
- 41
- Reaction score
- 25
- Location
- Arizona, USA
- First Name
- Eric
- Truck Year
- 1986
- Truck Model
- K5
- Engine Size
- 489 BBC
I have a '95 4L80E in my K5, that I converted to full manual operation...there is no ECU/TCU anywhere in this truck, shifting is 100% manual. Basically I'm now controlling the shift solenoids via the pressure manifold assembly and manual shift valve, with the line pressure solenoid locked out. Trans worked fine before I did the engine swap, though it sat for 7 months before I got the new engine in.
Issue now is extreme amount of delay going into gear..like a minute plus. Pull it out of park into reverse, wait a minute, then it grabs and goes. Back out of the driveway, shift to 1st gear, wait another minute, then it grabs and goes. Noticed it seems to drop into neutral when I come to a stop, though it seems to catch much quicker once the trans has warmed up. It will engage faster if I rev the engine a bit, and then it SLAMS into gear (which is to be expected, given that I'm running full line pressure at all times) Once I'm rolling, there's zero slippage in the trans. It barks the 33s no problem with little throttle in the 1-2 shift, and other than stopping or shifting from park to reverse or drive, there's no other issues with it.
I'm thinking I may have the trans overfilled now, as I pulled the pan and changed the filter before putting it back in the truck, and dumped 2 gallons of ATF in to it when I reinstalled the trans to bring the fluid level up to the proper level on the dipstick. Which seems like way too much, though at first I just figured it was because most of the fluid drained back to the pan from sitting so long.
I have the proper 1991 squarebody 4L80e dipstick tube in there (had to go to the dealer, and apparently I got the last one in stock), but I used the same dipstick from the '95 truck I took the trans from. Now I'm wondering if maybe that dipstick might be too short for the tube, leading to overfilling, but I can't find part numbers for any of the dipsticks themselves to see if there's a difference.
I'm also wondering if it might be an issue in the filter...when I was putting it in, it seemed like it didn't want to seat all the way in the trans. I've heard that there's a deep pan filter and a shallow pan filter, but I can't find references to either in the parts stores listings. My pan is flat on the bottom, and maybe an inch or so deep. I'm noticing it looks like the pan gasket is weeping all the way around, and wondering if maybe I have a deep pan filter installed in a shallow pan? Is that even possible? I ran all the bolts up with a torque wrench, so I don't think they're loose. I also DID replace the filter seal up in the trans case as well.
Issue now is extreme amount of delay going into gear..like a minute plus. Pull it out of park into reverse, wait a minute, then it grabs and goes. Back out of the driveway, shift to 1st gear, wait another minute, then it grabs and goes. Noticed it seems to drop into neutral when I come to a stop, though it seems to catch much quicker once the trans has warmed up. It will engage faster if I rev the engine a bit, and then it SLAMS into gear (which is to be expected, given that I'm running full line pressure at all times) Once I'm rolling, there's zero slippage in the trans. It barks the 33s no problem with little throttle in the 1-2 shift, and other than stopping or shifting from park to reverse or drive, there's no other issues with it.
I'm thinking I may have the trans overfilled now, as I pulled the pan and changed the filter before putting it back in the truck, and dumped 2 gallons of ATF in to it when I reinstalled the trans to bring the fluid level up to the proper level on the dipstick. Which seems like way too much, though at first I just figured it was because most of the fluid drained back to the pan from sitting so long.
I have the proper 1991 squarebody 4L80e dipstick tube in there (had to go to the dealer, and apparently I got the last one in stock), but I used the same dipstick from the '95 truck I took the trans from. Now I'm wondering if maybe that dipstick might be too short for the tube, leading to overfilling, but I can't find part numbers for any of the dipsticks themselves to see if there's a difference.
I'm also wondering if it might be an issue in the filter...when I was putting it in, it seemed like it didn't want to seat all the way in the trans. I've heard that there's a deep pan filter and a shallow pan filter, but I can't find references to either in the parts stores listings. My pan is flat on the bottom, and maybe an inch or so deep. I'm noticing it looks like the pan gasket is weeping all the way around, and wondering if maybe I have a deep pan filter installed in a shallow pan? Is that even possible? I ran all the bolts up with a torque wrench, so I don't think they're loose. I also DID replace the filter seal up in the trans case as well.