Gasser Axle swapped on a 1993 F350 CCLB Diesel.

[73IDIBenoit]

I recently purchased a truck that has no driveshaft. The previous owner did an axle swap but put a gasser 3.55 instead of a Diesel.
The one without the driveshaft attached is the smaller one, & the one with the strap is for the Diesel.

I’m trying to figure out what I’d need to do, & I’m scared I’d need to swap axles for one that has a bigger yoke.

Attached is the axle tag:
SS124K
3.55 10.25 4L21

 

[Nero]

I don't understand the question. Both axles should work just fine. I actually swapped a limited slip diesel axle into my dad's crew cab when it still had the 460 gasser in it, driveline mated right up no issues.

Are you trying to source or build a driveline?

 

[73IDIBenoit]

The truck needs a driveshaft, & the wrong size caps-hole width is different.

 

[Nero]

Oh the u joint straps are incorrect! Gotcha. You should be able to find straps based on what u joints are used.
As for sourcing a driveline.... Wrecking yard? Or have one built, but that's gonna be spendy.

 

[Jesus Freak]

Oh the u joint straps are incorrect! Gotcha. You should be able to find straps based on what u joints are used.
As for sourcing a driveline.... Wrecking yard? Or have one built, but that's gonna be spendy.

I had the drive shaft built for my dually. I can't remember how much it was, but it wasn't that bad. It started with they were going to lengthen the one I had, then they showed me how everything was wrong with mine and made me a new one only using one of the lengths of pipe. New carrier bearing, yolks, balanced..... actually probably the only good experience I've had letting someone do work for me.

 

[Nero]

I had a driveline from a 2wd manual standard cab rebuilt into a crew cab 4x4 one. Was about $475 back in 2017. They shortened one section, and had to lengthen the other.

 

[u2slow]

I don't have the bandwidth to load the pics right now, but you're likely dealing with the difference between any of the 1330, 1330C, and 1350 yokes. There are conversion joints for those.

If you want the max strength and both are long-yoke diffs, I suggest getting a solid pinion spacer, a new seal, and swapping the yokes over.

 

[franklin2]

Yes, if the rearends are the same, just swap the yokes. That is what I had to do when I swapped in my zf 5 speed. Same year truck and all, but the zf had bigger u-joints and a thicker driveshaft.

This will start the "oh no, you have to get a new crush sleeve and set the pinion bearing load" debate, but I have never done that and never had a problem. You do need a large impact, that pinion nut can be hard to get loose with just a breaker bar. Once you install the other pinion, you can tighten it as much as you can with a breaker bar and a piece of cheater pipe, or you can let the impact gun hit it about 3 times after the nut stops turning and you will be good. The old sleeve has already been properly crushed to the bearings that are already installed. You just need to tighten the nut up so it won't come loose. You can put a little blue loctite on it for insurance.

 

[u2slow]

The yokes swap so long as both are long or short pinion. The split is around 92. If the yoke has play on the spline (usually leaks too) you should get a new one.

Re-tightening a yoke on a used crush sleeve is easy to get mixed results. If overtightened, pinion bearings fail quickly. The solid spacer w/shims makes it darn near foolproof because it can take full nut torque without reloading the used bearings.

 

[david85]

I wasn't aware of any differences between gas and diesel front axles/driveshafts. But the two donor trucks I used for 4x4 parts were both gassers as it turns out.

 

[Nero]

I wonder if it's only different if you have a 5.0 or 5.8. When I swapped axles it was 100% like for like, but it was also a 7.5 so it already had the big beefy driveline.

 

[u2slow]

The semi-float 10.25" showed up in 300 and 302ci trucks. It bolts in the same though.

Front axles depend on GAWR.

 

[Nero]

To clarify, the rear I used was a full floater. I also swapped a d50 front axle from a f250 extended cab with a 5.8 into a f250 standard cab diesel, and that front driveline attached.