I have a 4wd truck with 33x12.5 tires. I would like to re gear the truck. But I am finding 4.10 for the 8.8 and it seems that with a new carrier the closest ring and pinion I can find for the D44 is 4.11. Can anyone point me in the right direction? This is beginning to frustrate me. I think stock break for the D44 is 3.73 and I have 3.55 stock so I don't think its going to make much of a difference. I want to go lower.

 

I guess a thick gear will fit. I just ran across that. Any downfall to a thick gear?

 

4.11:1 up front is what you want, never seen 4.10:1 for D44, and it would make no difference anyway. Stock, the TTB D44 is 3.54:1 with the 8.8" at 3.55:1

 

85106-6 Dana 44 4.10 Thick

East Coast has a 4.10 gear. Unless they just call it 4.10 but is truly 4.11. Thanks for the info.

 

You need a reverse rotation ring/pinion to work on the front D44 TTB.

 

That link I posted just says it fits a 44. So will that one I linked not work?

 

MOTIVE DANA 44 REVERSE, HIGH PINION, IFS
This one then? I don't have an HP 44 right?

 

I think that's right because, yes, you do have a high pinion Dana 44. Look at the diff case. If the drive shaft comes in above the center of the diff (above the level the axles come out) it's a high pinion. Ford (and now most other manufacturers) use high pinion diffs in the front because they require reverse rotation gears, which are stronger in a front axle where they are being turned the opposite direction of a rear axle.

An although it's been talked around, to be clear, 4.10 in the rear and 4.11 in the front is fine. The 0.2% difference isn't going to be noticeable.

 

Yes, you have a HP 44, which requires reverse spiral cut gears, often referred to as reverse rotation.


The 4.10s posted earlier are not reverse spiral cut, and will therefore not work in an HP 44 application.

 

As previously stated, yes you have the equivalent of a D44 HP that requires reverse rotation gears.

 

Go to a junkyard and find a 4wd F250 with the Dana 50 TTB, and buy the whole 3rd member. It'll most likely have 4.10 gears and it will bolt right onto your D44 axle beam. You won't have to worry about setting up the gears properly and it'll probably be cheaper than re-gearing your axle.

 

The D50 takes the same axle shafts we have in the F150s? Is the pinion longer, requiring a shorter driveshaft?

 

The front and rear gears are almost always 0.01 different.
It's worth noting that a Dana 50 gear set is NOT a direct drop in to a Dana 44. They are very similar, but the ring gear diameter is a 1/2" different, ring gear bolt hole diameter is different, and the pinion needs to be spaced out to fit.

 

I'm not suggesting someone take a D50 ring and pinion and swap it into a D44 housing, I'm saying you can take a complete D50 third member (this includes the D50 housing with the gears and everything still installed), and bolt it onto a D44 axle beam.

 

You can re-use your existing driveshaft.
I don't think you can use the D50 axle shafts but you can re-use your existing D44 axle shafts. However, I suggest grabbing the D50 passenger side stub shaft and using that because it has a bigger and stronger U-joint.