Hi, I am seriously considering doing the 4.6 to 5.4 swap, I have spent countless hours reading what will need to be done, doesnt sound like a whole lot. I have 3 questions, how much will a chip cost? How can I contact I believe JMC said his name was mike and he burns chips? And My biggest concern about the swap, how will my original rear end with 3.55's in it hold up with the 5.4's tourqe? BTW I have a 4.6 windsor with an auto-O/D 4x4 tranny.

 

They put the same rear end in the trucks with the 5.4, so you'll be fine.

 

HI!... All 5.4 F-150's come standard with the STERLING 9.75 rearend. The 4.6/4.2 F-150's only come with the FORD 8.8 rearend. In stock trim the 9.75 is twice as strong as the 8.8. JMC destroyed 3 8.8's then he converted to the 9.75 and has not had any problems since.

 

You can contct Mike under the supporting vendors page, click on the website for troyer performance, find the phone number and tell them what you want to do, they will be more than happy to help you out.

 

the 8.8 in the cobras hold up well along with those in the GT's

 

The 8.8 was used/has been for a looong time in V-8 motors.
When you start doing things beefier over stock configuration as far as power are concerned, then think about upgrading.

 

Yes but add 1000 - 2500LBS of vehicle weight to that 8.8 and it will self distruct quite easily. MUSTANGS break the tires loose before breaking the 8.8. Put slicks on that STANG and dump the clutch a few times at a good prepped dragstrip and you will be picking up spider gear with a magnet off the track. The 9.75 spider gears are TWICE the size of the ones in the 8.8 and so is the carrier. I've blown up several 8.8's over the years. I have also managed to blow up a 9.75. Trust me the 9.75 is at least 3 times stronger that the 8.8.

 

im not saying the 9.75 isnt 3 times stronger just saying the 8.8 will handle the 5.4 if u dont abuse it

 

Ahhh, go with a dana 60.

Adrianspeeder

 

The 93 94 95 Lightnings all came with 8.8's , they hold up well until you add a supercharger and start dragracing.

 

It's all in how you use it, I had an 84 Bronco that I built a 351 for, the 8.8 held up, but I didn't abuse it, to bad. But if you are going to be doing some hard core stuff then go with the 9.75 or the dana 60

 

My 84 doesn't have the 8.8. I thought the switch to that was in 85.

Adrianspeeder

 

My 84 Bronco had it, my 83 4x4 150 had it, but my 84 4x2 has the 9 inch.