JonathanF

Im wondering if this regear is as simple as changing the ring/pinion and bearings? I would like to find it at a pull apart but Im not sure what too look for when identifying 3.55's, and possibly if theres other vehicles like explorers with 3.55's would fit, because 3.08's with 32's just isnt doing it

I have a 8.8 31 spline btw

Mista_Breeze

I'd also like an answer to that. I recently asked this in the drivetrain section with no answers. Most people say its easier and cheaper to just swap the axle out. I have a great deal on a 4.10 ring and pinion that I can't pass up. As far as explorers go the gears etc should be the same but if I'm not mistaken the axles are shorter. Same with the e vans.

Just call me Sean

iTrader: (1)

No it's not that simple.

mopete1

There is alot of set up when regearing and rear end.

1st is pinion depth.
This is accomplished by shims between the pinion shaft and the larger bearing.
Most of the time you are fine by just using the one that is one there from what ever vehicle you are taking it out of.

2nd is the crush sleeve to set the bearing preload
You will need a new one of those and it is better to buy 2 incase you mess the first one up(its easy to do) There are specs are a turning torque of the pinion which you measure with an old torque wrench with the needle that moves. I can probably supply you with the specs for that if you need too

3rd is setting the backlash. This is the most strenuous work of it all. This is how much play is between the pinion gear and the ring gear. If I am not mistaken the 8.8's require different thickness shims to move the carrier side to side to acquire the the correct backlash. I can probably supply you with those specs as well. Take the shims from the vehicle you take the gears out of. and keep the ones that are in your rear right now and mix and match. you might luck out or you might have to get new ones.

As far as getting one from and explorer or and expedition or something as along as it has the 8.8 rear end you will be fine. If the vehicle has 28 spline axles you either simply take out your spider gears( if it is an open diff)or swap ring gears from one carrier to the other and switch them out. It will be more complicated if you have a tlock unless you just switch out the ring gear itself on the carrier. as far as the axle codes to tell you which gears are behind what cover.

Check this site out.
http://www.fordification.com/tech/rearends_ford15.htm

Hopefully that will help the both of you out.

mopete1

Oh and I forgot to mention

to measure pinion depth you need a pinion depth gauge and they are expensive

and to measure backlash you need a dial indicator which I imagine you could buy either a cheap on or an expensive one.

Mista_Breeze

Axle swap it is.

f150cam

yes, axle swap is easier/cheaper. just look for a axle out of a a 150 that has 3.55 gears. if you didn't know you can look at door tags for the axle codes, dont need to crawl under the trucks (granted the owner of the truck could if switched axles and it may be different)

the door code needs to be
19 — 3.55 non-limited slip
H9 — 3.55 limited slip

i can get a set of axles for my 250 for $350-400 out the door, so i imagine for a 150 you can probably cut that price in half, especially since iv been told people can get axles for as little as $50 each in some parts of the country.

Mista_Breeze

Do you know off hand the door code for 3.73ls? I think you were the one that gave me a link to a list years ago. But I don't have the password to the_breeze anymore so it's lost information.

f150cam

19 — 3.55 non-limited slip (Econoline, F-150)
18 — 3.08 non-limited slip (F-150)
17 — 3.31 non-limited slip (Econoline)
H9 — 3.55 limited slip (F-150, F-250)
B6 — 3.73 limited slip (F-150, F-250)
C5 - 4.10 limited slip (F-250)
24 — 3.73 (Econoline)
32 — 4.10 (Econoline)
35 — 4.09 (Econoline)
34 — 3.73 (Econoline)
39 — 3.55 (Econoline)
52 — 4.10 (Econoline)
56 — 4.10 (Econoline)
81 — 4.63 (Econoline)
27 — 3.31 non-limited slip (F-250)
26 — 3.73 non-limited slip (F-250)
41 — 3.27 non-limited slip (Explorer/Mountaineer)
45 — 3.55 non-limited slip (Explorer/Mountaineer)
46 — 3.73 non-limited slip (Explorer/Mountaineer)
42 — 4.10 non-limited slip (Explorer/Mountaineer)
D1 — 3.27 limited slip (Explorer/Mountaineer)
D4 — 3.73 limited slip (Explorer/Mountaineer)
D2 — 4.10 limited slip (Explorer/Mountaineer)
84 — 3.45 non-limited slip (Ranger)
86 — 3.73 non-limited slip (Ranger)
87 — 4.10 non-limited slip (Ranger)
89 — 4.56 non-limited slip (Ranger)
F6 — 3.73 limited slip (Ranger)
F7 — 4.10 limited slip (Ranger)
92 — 3.08 non-limited slip (Ranger)
R5 — 3.55 limited slip (Ranger)
91 — 3.27 non-limited slip (Ranger)
96 — 3.73 non-limited slip (Ranger)
R6 — 3.73 limited slip (Ranger)"


i lost the list on my old computer so its not as updated, but it has most of them.

Mista_Breeze

Okay. So I need to keep my eyes peeled for a B6 or a C5. If my memory serves me correctly the explorer and van axles are narrower?