No I don't pull anything at all, I just wanted this truck because it's old with low milage and older vehicles last longer than the crap thats being put on the market these days. The thing I'm worried about is what if I get stuck in the snow if I have the 3.08's? Is there gonna be enough low end juice to get me unstuck?

 

The gearvendors has a ratio of 22%, the E4OD has 29% overdrive. And the E4OD can lock its TC, so you get all the RPM drop possible.

For 3.08 gears, you will not notice any difference in accelleration when you are running empty. For traction, I have to be carefull when roads are wet even with posi, because BOTH rear tires can kick loose if i'm starting uphill (and it could do this before the tranny swap and turbocharger).

What I remember from when I still had 4.10s was that the truck would run very well up to about 80 or 90 KPH, and was fairly snappy off the line, but was pretty much done by the time I tried to cruise at 100.

With 3.08s the start off the line will feel more smooth, but your overall 0-100 time will be compairable since the engine is staying in a usable RPM zone for longer (instead of winding out at 90). 110-120 is where the truck got the best overall performance for time on the road, and fuel economy (15-20mpg).

For snowy conditions, it doesn't matter all that much what gears you have, since traction is the limiter. Although taller gears (3.08s) can have the advantage of lower torque, which gives you more ability to "feel" when the truck is about to break traction.

 

Yes, I might just know that lol! (see my signature)

Went from 3000 rpm @ 100KPH(61 MPH)

to 1450 prm @ 100KPH(61MPH)

 

Thats the answer I was looking for! Ya mines pretty snappy with the 4.10's, but the overall top speed sucks big time. I normally dont spin the tires in the winter because as you've said you develop a "feel" when the truck is about to break traction, and I can notice it with the 4.10s. The weight of the truck is pretty substantial enough so that the tires dont spin. The only time the tires really start to spin is if I hammer the pedal too hard, the obviously that will make it spin.

 

So you got that much of a drop from the E40D and just the 3.08's? Thats pretty darn sweet, thats what I'm after actually.

 

davids truck sounds great for highway driving if most of your driving is short trips a little lower gears maybe 3.55 and overdrive more optium rpms.
the c6 has another thing going for it in stuck conditions if you put lever in 2cnd position it can't shift to first and tires can't rollback doesent spin on ice as easy taking off.

 

Nah, I think I'm convinced that the 3.08's will do it for me. I like to do a lot of long distance trips. I think the next trip I'm gonna be doing is to Quebec to see my mom, and I'll be doing that next summer. Thats a pretty long drive, about 4000km. The only thing I'm worried about is something stupid breaking, for example on my way down here....just my luck, my last 120 miles of road left before my trip was over, my hanger bearing went on the highway. WTF?! Now if theres anything I should be looking for, its stupid things like that that's gonna cost me my trip.

 

sounds like 3.08s will fit you well i'd start with that can always add overdrive later if needed.
I personally if you decide to trade I would go 4x moving to nw territories probabally not as good of trade value on 2x there but then you got payments hatem gotta love that north country tho good luck.

 

Hah, like I said one thing at a time. After the gears have been swapped, and I got my gear vendors, maybe I'll look at something like adding on the 4x4 feature. My buddy keeps nagging me constantly on how stupid it is to have a big truck like this and not have 4x4, I kind of agree, but its not like I really need it, its just there as a "just in case". Thats how I see it.

 

sounds like a plan I would come up with I don't know about availability of 3.08 gears for front ends though.
I've been known to go places even 4x gets me in trouble.
I've picked up several f250s over the years 80s and early 90s vintage 4xs with 3.55s pretty cheap I guess you could say I'm cheap .

 

So you cant mix a 3.08 rear with a 3.55 for a front for example? What would be the consequences of that?

 

another thing if your going to convert to 4x wait until you do before going with gv as it goes behind transfercase takes different adaptor than c6 unless you find a used one for c6 there pretty common on used market find 205 transfer for c6 out of 70s model pu geardrive last forever c6 205 gv bulletproof combo can always go with frontend later.

 

3.08 plus 3.55= parts flying all over road ford likes to go with 4.10 and 4.11 3.55 and 3.54 ect. but that is as far different as I would go.

 

lol...so not a very good idea....

 

in 95 I bought a 91 ext cab 7.3 zf5spd with 105000 miles junk body motor eventually went in my 84 f250 4x that I picked up in wy with tired 6.9.
91 for 1000 84 for 800 =1800 bucks for a very dependable rig that I've put lots of miles on still have 5sp and rear eventually going into my 75 highboy that has had 6.9 since 85 tuff truck but like yours 4.11 needs overdrive.