03 f150 4v swap.

Reaper14

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I was hoping for a full how to write up for someone with little knowledge about swaps like myself. Would love to do this to my 03 step side. Im too attatched to it to let it go at 200k mi with a V6

Vic
 

_Lariat

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How much harder would it be? I plan on buying a high mile navi that runs for the swap so I can use as much from it as possible.

Vic
Your v6 trans wont work, motor mounts, trans mount and a crossmember for whatever you use, you'll need a PCM from an F150 then have it tuned. With or without PATS. I'm not certain the dash wiring isnt different. Are you 2wd or 4wd? The v6 to v8 has been discussed across several F150 forums. 9 times out of 10 it never gets done. I dont know that I've seen a finished from beginning to end v6-v8 swap.

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Reaper14

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Your v6 trans wont work, motor mounts, trans mount and a crossmember for whatever you use, you'll need a PCM from an F150 then have it tuned. With or without PATS. I'm not certain the dash wiring isnt different. Are you 2wd or 4wd? The v6 to v8 has been discussed across several F150 forums. 9 times out of 10 it never gets done. I dont know that I've seen a finished from beginning to end v6-v8 swap.

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It is a 2 wheel drive. I have searched through many forums for this as well. Every time it gets asked, it gets talked about, but have yet to see one finished or even talked about that they went through it. Found a thread with a Coyote swap, & he says its easy, but thats as far as it gets. It was a thread too old to revive though. Have yet to see one get done from a v6. Which makes me want to do it even more. If its not possible, I'll move on. But seems like with enough work & a full Navigator to swap parts from, I have a little hope it can be done.

Vic
 

_Lariat

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Well, 1k miles in, and I can say this one thing. The truck needs deeper gears. 3.31s just arent enough. It runs very well, but my hilly location just wont let the truck sit in overdrive with T/C locked in. However with a 32" tire and 3.31s it cruises at 60 mph turning 1500 rpm on the dot.

Would I do the swap again? Oh hell yeah. Once the engine is in its power curve, it pulls very well. Sadly the hearing of the truck and the 4r70 kills it. Time shall tell on what happens next. I've got my eyes on a 6r80 swap. Also looking for axles.

I'm thoroughly impressed otherwise. Cant wait for exhaust work!

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_Lariat

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Well, finally hooked it up to a trailer and pulled something around with it picked up a donor truck with a set of 3.73 axles. Bonus points on the limited slip! Gonna go through them and service them before they're installed. It's safe to say I will not miss the 3.31s.
20200219_201226.jpeg


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_Lariat

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Those will wake it up but I feel like 4.10s should be a minimum with a 4r and the 4v.
Not arguing that in the slightest, but this truck is basically being built off spare parts. It sees 20ish miles a day, and of those 20?17 are highway. Not really worried about deep gears. The 3.73s will be a major improvement.

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_Lariat

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The difference between 4.10s and 3.73 is negligible, especially if the 4.10s are more expensive. IIRC, Navigators came with a 4R100.
Yep, 4r100 in navi and most expys. I figured I'd see "more" wheel HP with the 4r70. Eventually when it let's go I'd like to 6r80 swap it. Time will tell though.

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_Lariat

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Took a road trip last night. Thing for the most part sips fuel when cruising down the interstate at 75. Not bad considering the first 70 miles of it were gravel road travels. The trip back I've got like 90 miles on the tank and still have yet to hit the 3/4 tank mark. I'll miss the 3.31s for travelling, but honestly, I think the 3.73s will help more where I'm driving it all the time.
Screenshot_20200222-223001_Calculator.jpeg


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_Lariat

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Well, got some sad news. Truck spun a rod bearing on the way home from work last night. Gonna see what I can do to fix it. Guaranteed the engine is coming back out. Checked oil Tuesday and all was fine and dandy. Checking mail and the oil pressure dropped and I noted a knocking sound. Get limped into the driveway and shut it down. Let it sit and find there isn't any oil on the dipstick. No idea where it went wondering if I cracked a ring to be honest. Didnt have any leaks or odd smells in the last 2 days. Just my luck!

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Need 04 Wine

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Ah thats the shits.

Full build and cx turbo time!!!
Well, got some sad news. Truck spun a rod bearing on the way home from work last night. Gonna see what I can do to fix it. Guaranteed the engine is coming back out. Checked oil Tuesday and all was fine and dandy. Checking mail and the oil pressure dropped and I noted a knocking sound. Get limped into the driveway and shut it down. Let it sit and find there isn't any oil on the dipstick. No idea where it went wondering if I cracked a ring to be honest. Didnt have any leaks or odd smells in the last 2 days. Just my luck!

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_Lariat

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_Lariat

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Old photo from like march, but its back up and running! Averaging 12ish mpg. Most trips are about 12 miles with about 4ish stops, so it cant be the best. Got 18 with it on the interstate. A good tuner will definitely make or break the swap!
20200416_180214.jpeg


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