Guides & Information. 48re Transmission Cooler Line Diagram. Deleting the Transmission Check Valve.
Transmission: 4-Speed Automatic Transmission, 5-Speed Manual Transmission. 48re Transmission Coolers. You'll notice the flow direction is marked on the old check valve itself. I find the large 15 quart Blitz pans can cover both drips in one pan and work well. The replacement is a return line with no check valve that replaces the current line without hacking up any of the truck's trans lines or fittings. You can then take a peek in the check valve side to see the check valve inside the fitting. The black band around the tool is actually a rubber band and assists you in closing and holding the tool around the pipe you are using it on. Here's a pic of it installed: Engage the emergency brake and start up the truck and put it in Neutral.
Trans oil catch pan. Then remove the tool. Tools needed: 7/8" open end wrench. A razor blade won't work because the trans line is reinforced with steel mesh to keep it from expanding. Trans line hose is reinforced and rated for +150PSI, any less and the hose will eventually swell and split, (probably while you're driving) and then you'll lose fluid and overheat. Well, if you have debris in your trans fluid from normal wear and tear, a common place for it to collect is in the check valve. Throw another hose clamp on the hose before inserting the radiator side coupling. 4l80e Transmission Parts Diagram. Well, here's a little write up to remove the tranny check valve in the return line to increase flow to the trans and hopefully remove a common failure point in the Dodge 46re transmission.
NAPA part #05706B106). The large coupler was 7/8" on the outside, but the nozzle and flare pieces were 17mm (IIRC), so I just used a crescent wrench as I didn't have a larger metric wrench. Remember to measure twice and cut once! Total price: ~$35 for parts. This will allow the trans fluid pump to refill the Torque Converter so you don't bog and stall as you try to take off.
1 or 2 quarts ATF +4 trans fluid. Let the truck heat up to operating temp and check the trans fluid level on a level road or parking lot. After you remove the check valve line, turn it quick connect side down and let the trans fluid drip out. Next we need to construct a new replacement hose with fittings. It's a good idea to let the truck idle in neutral for about 10 seconds before taking off after the truck has sit for an extended length of time. Just stuff the replacement check valve fitting unit in one end of the hose, clamp it down with a hose clamp and hold it up to the old check valve line before you cut. Recheck all of the connections. Here's a pic of the check valve side brass fittings (you can see these assembled in the quick disconnect tool pic posted earlier. The new fittings will make the whole unit a little longer than the old one, so don't judge rubber tubing to rubber tubing when you cut. 2 - hose clamps (NAPA part #5051212). Just use the old check valve unit to judge length before you cut. Just remove the hose from the fittings via the hose clamps and place the cooler or filter unit in between the two couplings and pipe the hoses into your current couplings. The 7/8" wrench should fit on the check valve and the 3/4" should go on the silver connector on the the trans return line. 1 - 3/8" to 1/4" reducer coupling (NAPA part #3300X6X4).
The tip on the nozzle serves as a catch so that the band clamp (when tightened down) can't slide backward. A flat head screwdriver. Offers the wholesale prices for genuine 2001 Dodge Ram 1500 Regular Cab parts. This setup is also nice if you ever want to add an external cooler or filter to the trans return line. The coupler in the pic is just a simple 3/8" male-to-male coupler.