Transmission Cores: 

Completely drain the transmission and torque converter. Place the converter into the original box(es) and securely strap the transmission on the pallet the same way it arrived. (We do not need the stock flex plate.) 

Once the transmission is ready for pickup, call 614-733-3744 to schedule the shipment.  

Because this is considered a freight shipment, we need to schedule a specific day for pickup, within a minimum of a three-hour window. Once it is scheduled, an email will be sent with a Bill of Lading attached from Unishippers. THE BOL MUST BE PRINTED FOR THE TRUCK DRIVER or they will not accept the freight and charge a fee for an empty run. Please specify if no one will be present at the time of pickup. 

*Terminal drop-off is also available upon request. 

Valve Body Cores: 

Please promptly return your valve body core to us unless a previous arrangement has been made with a Firepunk representative.  

Firepunk Diesel LLC 
8005 Lafayette Plain City Rd
Plain City, OH 43064

YOU ARE RESPONSIBLE FOR SECURING PACKAGING YOUR VALVE BODY! Otherwise, they are susceptible to damage in transit as carriers are not gentle with packages. If this happens, you will not receive your core charge refund as we will not have a usable core. Please drain all fluids from the core to keep the box and packaging in good condition. 

Converter Cores: 

Use the original box(es) your new converter arrived in to return your core. Drain your converter of all fluid before shipping. Your converter core should be returned directly to DPC: 

Diesel Performance Converters
8208 GA Highway 16 West
Monticello, GA 31064

BE SURE YOUR NAME IS CLEARLY MARKED ON THE BOX OR SHIPPING LABEL! We need to know to whom credit should apply for your core charge refund. 

*USPS is not preferred to return your core 

Call 614-733-3744 or email office@firepunkdiesel.com with any questions. 

1. ALIGNMENT
   Make sure when installing that both centering dowels are secure in adapter plate to assure converter alignment.
2. FLUSH
   Always flush your transmission lines and cooler. If you don’t have a flushing system, use a cooler line flush from your local parts store and blow lines out with compressed air. Flush lines/coolers until the fluid coming out is clean and free of contaminants.
3. FLUID
   After installation is complete, add eight quarts of Dexron/Mercon III transmission fluid then start the truck with transmission in neutral to circulate fluid then fill to correct level. Depending on your pan capacity, a complete system holds 16-20 quarts total. Always read both sides of the dipstick when checking fluid level and the lowest reading is the accurate level. Put transmission in drive-neutral reverse, then back to neutral and check the fluid level again. Once you are sure the correct level is achieved, you are ready for a test drive.
4. TEST DRIVE
   Make sure the transmission is starting in first gear. If the transmission wiring harness is not making a good connection with the valve body, it can cause a limp mode where you get second or third gear starts. A faulty governor pressure solenoid or transducer can also cause this problem. IF YOU GET SECOND OR THIRD GEAR STARTS, DO NOT CONTINUE. Immediate internal damage can happen if the transmission goes into limp mode and you continue to drive it.
5. DOUBLE CHECK
   Assuming transmission is working correctly, drive medium throttle through the gears to assure that all gears are functioning properly. Once confirmed, double check for leaks and proper fluid level, then you are good to go.
6. ONE THOUSAND MILE SERVICE
   After the first thousand miles on the transmission, you need to do a fluid and filter change to flush out all the assembly lube used in the rebuild process. Also, make sure the second gear band doesn’t need adjustment after the break-in period. There should be a 1/4 – 5/16 in. gap between the apply lever and the second gear servo apply pin or 72 in/lbs. and back off two full turns for proper second gear band adjustment.
7. REGULAR SERVICE & MAINTENANCE
   Service intervals of 25,000 miles will ensure a long, healthy transmission. On high horsepower trucks that see regular competition, it is recommended to change fluid every spring and fall.