Ford 6.7 Power Stroke 6R140 Transmission Line Failure, and the Fix
The 6R140 behind the 6.7 Power Stroke runs factory lines that crack and leak with age and heat. Here is the direct braided replacement for 2011...
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Tech guides
Diesel tech guides
What fails on Cummins, Power Stroke and Duramax trucks, why it happens, and the part that fixes it. Written by the people who do the work.
26 guides
Cummins Transmission Lines: Why They Fail and How to Pick the Right Kit
The factory rubber lines and heat exchanger on Dodge Cummins trucks are a known failure point. Here is how they go and a full breakdown of...
Read the guideFSD Titanium Hardware for Cummins – The Final Touch Your Build Deserves
If you're building a 5.9L or 6.7L Cummins and still using factory bolts, you're leaving the job unfinished. Our new Full Send Diesel Titanium Hardware Kits are...
Read the guideBuilt to Rule: Why Kingspeed is the King of Billet for Cummins
If you're serious about your Cummins build—especially if you’re running big boost, compounds, or just want to clean up the engine bay the right way—Kingspeed billet...
Read the guideThe Ticking Time Bomb On Your Cummins: Heat Exchanger Failures SOLVED
Let’s clear this up once and for all—because there’s a ton of confusion about heat exchangers on the 2003–2007 5.9L Cummins trucks. Some guys say bypass...
Read the guide2011-2024 Powerstroke Owners Need This...
If you drive a 2011–2024 6.7L Power Stroke, there’s one weak spot that can wipe out your whole fuel system without warning: the factory CP4 injection...
Read the guide5th Gen Cummins Engine Failure – The Truth Behind Lifter and Cam Issues
If you're driving a 2019+ 6.7L Cummins (aka 5th Gen), you need to pay attention to a growing issue that’s been wrecking engines way earlier than...
Read the guideAN Fittings 101: AN Fittings, Sizing, Uses, How-To, Types, Etc.
AN Fittings 101: At Full Send Diesel, we got tired of dealing with weak fittings, sloppy threads, and backorders—so we made our own. Our full line...
Read the guideChoosing the proper lift pump for your Cummins build
At Full Send Diesel, we don’t just sell FASS — we run their fuel systems on every single one of our Cummins builds. Whether it’s a clean...
Read the guide5.9L & 6.7L Cummins Injector, CP3, and Rail Relief Guide
If you’re building a 5.9L or 6.7L Cummins, your fuel system matters — a lot. At Full Send Diesel, we’ve built dozens of these trucks, and the...
Read the guide2019–2024 6.7L Cummins Injector & CP3 Sizing Guide: How to Choose the Right Fuel System (Common Rail)
Looking to take your 2019-2024 6.7L Cummins to the next level? Whether you're chasing 600 horsepower or going all-in for 1200, this guide breaks down proven...
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