74flatbed
Junior Member
- Joined
- Jul 30, 2017
- Posts
- 8
- Reaction score
- 1
- Location
- Montana
- First Name
- Paul
- Truck Year
- 1974
- Truck Model
- K1500
- Engine Size
- 350
Hello All,
I just thought I would share my pain so others could learn faster:
Initial plan: Flush transmission on my truck using a pulled line from the aux oil cooler. I figured I'd flush the cooler and clean out the pan, two birds kind of thing.
Actual:
Dropped pan and noticed 1/2" of sludge and a magnet that was so covered you could see the magnetic fields.
-I decided to replace the old dented pan with new Derale pan that would add two quarts and hopefully cool the fluid a bit. Ordered from Summit and waited a week.
-Installed new pan, refilled fluid, and pulled cooler line. When I started up the truck to start the flush, the oil came out of the wrong tube. After a lot of head scratching and cussing, I followed the oil lines back to the TH350 to discover they had been installed backwards. I tried to redneck the old lines to the right holes, but to no avail. Ordered new lines from Summit, along with inline transmission filter, and am waiting another week.
-Long story short: Suggest you don't assume anything about the PO and confirm everything before you loosen that first bolt or screw.
Next: Install new hard lines, install inline filter, install new aux oil cooler, complete flush, and pray my TH350 isn't going to die from the high temps it saw in a previous life (aka oil was routed through aux cooler to radiator then back to trans).
-Paul
I just thought I would share my pain so others could learn faster:
Initial plan: Flush transmission on my truck using a pulled line from the aux oil cooler. I figured I'd flush the cooler and clean out the pan, two birds kind of thing.
Actual:
Dropped pan and noticed 1/2" of sludge and a magnet that was so covered you could see the magnetic fields.
-I decided to replace the old dented pan with new Derale pan that would add two quarts and hopefully cool the fluid a bit. Ordered from Summit and waited a week.
-Installed new pan, refilled fluid, and pulled cooler line. When I started up the truck to start the flush, the oil came out of the wrong tube. After a lot of head scratching and cussing, I followed the oil lines back to the TH350 to discover they had been installed backwards. I tried to redneck the old lines to the right holes, but to no avail. Ordered new lines from Summit, along with inline transmission filter, and am waiting another week.
-Long story short: Suggest you don't assume anything about the PO and confirm everything before you loosen that first bolt or screw.
Next: Install new hard lines, install inline filter, install new aux oil cooler, complete flush, and pray my TH350 isn't going to die from the high temps it saw in a previous life (aka oil was routed through aux cooler to radiator then back to trans).
-Paul
Aren't Sqaures such a fun thing to work on
. Just got my trans seals replaced and then find out the rear main is going out.
