TTB 44hd vs TTB 50 Help
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5th Gear
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TTB 44hd vs TTB 50 Help
Hello, been reading the wealth of info/knowledge on this forum for many years.
Broke my driver axle ttb 44hd f-250 last year. Can't find replacement for the ttb 44hd so i bought one from ttb50. Length and inner shaft spline seems the same except for the spline on the short outer stub. U-joints are bigger as well. My question is can i just use manual locking hub from ttb50 so the spline can match with the short outer stub/axle or do i need to change out knuckle and spindle or anything else
Broke my driver axle ttb 44hd f-250 last year. Can't find replacement for the ttb 44hd so i bought one from ttb50. Length and inner shaft spline seems the same except for the spline on the short outer stub. U-joints are bigger as well. My question is can i just use manual locking hub from ttb50 so the spline can match with the short outer stub/axle or do i need to change out knuckle and spindle or anything else
Last edited by leehenry; Mar 1, 2025 at 12:54 PM.
Lead Driver
Joined: Jun 2021
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Hello, been ready the wealth of info/knowledge on this forum for many years.
Broke my driver axle ttb 44hd f-250 last year. Can't find replacement for the ttb 44hd so i bought one from ttb50. Length and inner shaft spline seems the same except for the spline on the short outer stub. U-joints are bigger as well. My question is can i just use manual locking hub from ttb50 so the spline can match with the short outer stub/axle or do i need to change out knuckle and spindle or anything else
Broke my driver axle ttb 44hd f-250 last year. Can't find replacement for the ttb 44hd so i bought one from ttb50. Length and inner shaft spline seems the same except for the spline on the short outer stub. U-joints are bigger as well. My question is can i just use manual locking hub from ttb50 so the spline can match with the short outer stub/axle or do i need to change out knuckle and spindle or anything else
Considering you didnt ONCE think to include your YEAR for your vehicle in this post, i am just posting this first page of list numbers. Please go and give us the list number and some details about your truck please
Lead Driver
Joined: Jun 2021
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According to what Spicer says, your axle is a Dana 44 UNLESS you have a "SNOW FIGHTER" plow prep package. heres a Dana 50 for comparison to the previous post. Notice how it says where to find the axle ID on the member
Hotshot
Joined: Nov 2017
Posts: 17,484
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From: Northern Ontario
Hello, been reading the wealth of info/knowledge on this forum for many years.
Broke my driver axle ttb 44hd f-250 last year. Can't find replacement for the ttb 44hd so i bought one from ttb50. Length and inner shaft spline seems the same except for the spline on the short outer stub. U-joints are bigger as well. My question is can i just use manual locking hub from ttb50 so the spline can match with the short outer stub/axle or do i need to change out knuckle and spindle or anything else
Broke my driver axle ttb 44hd f-250 last year. Can't find replacement for the ttb 44hd so i bought one from ttb50. Length and inner shaft spline seems the same except for the spline on the short outer stub. U-joints are bigger as well. My question is can i just use manual locking hub from ttb50 so the spline can match with the short outer stub/axle or do i need to change out knuckle and spindle or anything else
This came up not too long ago, last year maybe. I can not remember the outcome, but worth searching for.
Iirc, for TTB - no the 44HD components were not compatible with the 50. But I cannot remember for sure.
Might help to post up pictures as well. If I can find the thread in my subscriptions, I’ll post it up.
Torque king has a great web site for looking at parts as well, you can see what crosses over for compatibility.
What actually broke? I’ll be interested to hear where you get with this one way or the other.
2nd Gear
Joined: Mar 2025
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Can some one spell it out for me? I am new to these drive trans and am learning. what is
TTB
44HD
I have a 1991 F250 and am learning
TTB
44HD
I have a 1991 F250 and am learning
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Cargo Master
Joined: Mar 2010
Posts: 3,331
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From: Laramie, WY
Can't use d50 lockouts on your d44hd bc the d50 parts are larger diameter and won't fit in the hub. As I understand it, pretty much nothing between the two swaps.
Best bet is probably a junkyard for the correct stub shaft for the d44hd. Or, get a whole d50 and swap that in. You'll be less likely to break again. I'm just not completely sure the beams are the same length? I think they are, but can't tell you for sure.
Best bet is probably a junkyard for the correct stub shaft for the d44hd. Or, get a whole d50 and swap that in. You'll be less likely to break again. I'm just not completely sure the beams are the same length? I think they are, but can't tell you for sure.
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Cargo Master
Joined: Mar 2010
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From: Laramie, WY
D44HD is a version of a TTB. Dana 44 heavy duty. They came in F-250's and were leaf sprung. Some F-250's came with the larger Dana 50 TTB instead, which is a little stronger.
Lead Driver
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Once you do, we can source or tell you what could work, and find out if we can get it
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5th Gear
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Can't use d50 lockouts on your d44hd bc the d50 parts are larger diameter and won't fit in the hub. As I understand it, pretty much nothing between the two swaps.
Best bet is probably a junkyard for the correct stub shaft for the d44hd. Or, get a whole d50 and swap that in. You'll be less likely to break again. I'm just not completely sure the beams are the same length? I think they are, but can't tell you for sure.
Best bet is probably a junkyard for the correct stub shaft for the d44hd. Or, get a whole d50 and swap that in. You'll be less likely to break again. I'm just not completely sure the beams are the same length? I think they are, but can't tell you for sure.
Cargo Master
Joined: Mar 2010
Posts: 3,331
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From: Laramie, WY
Though it's only the outer stub. I bet you need the inner too?
https://www.ebay.com/itm/276859946891?_skw=d44hd+stub&itmmeta=01JNCJHN0KPMK Z8S47ZDCNHDK5&hash=item407623878b:g:lvYAAOSwcphkVU 4w&itmprp=enc%3AAQAKAAAA0FkggFvd1GGDu0w3yXCmi1fdBL I7LkuyZW4TgA2jyhjtb9RPAaYDLhv0xrGlz37Ap%2FohvAeyEW GQATbPHjkUJkQ2qAzFdVgwzZ79QbpI2f%2BPbNPGjkzG31Th6V p%2Bi4GyxFGRKwc
mJhXxyLQHGBfgeZ%2B9gv4MtFThf2toCR cXchd8oRFY1vrnumHtPLGmeVUa1WCHfJJ%2BOPowGc43aGhUIU WYTS4sX1pQfD6YBZnVxZ%2F4QFWIn%2BFvIzjzP0JzSgAlydBl ZyaMYoyh1uPPH4LEs%3D%7Ctkp%3ABk9SR7LQxpKrZQ
Cargo Master
Joined: Mar 2010
Posts: 3,331
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From: Laramie, WY
Lead Driver
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I'm gonna pull this from my memory of 20 years ago when I was a junkyard addict, building all sorts of rigs with junkyard parts --- The d50 outers are the same as d60, the shaft outers are bigger than 44, the shaft itself is bigger than the 44, and it necks down to same size as the 44 to get into the differential. The the u joints are bigger in the 50 than the 44 and the 44hd has only the larger outers (hubs) with the rest of the sizing to be the same as reg 44. You can't make any 44 parts work on the 50 without modifications or sourcing the correct parts.
Awesome van. If it has a 44 currently, I'd simply source a complete 50 TTB assembly and put that in. It *is* an upgrade and would eliminate any of the bullshlt that you're going through now in sourcing parts. Also you should be able to find a 50 ttb assembly for cheap
Awesome van. If it has a 44 currently, I'd simply source a complete 50 TTB assembly and put that in. It *is* an upgrade and would eliminate any of the bullshlt that you're going through now in sourcing parts. Also you should be able to find a 50 ttb assembly for cheap
Hotshot
Joined: Nov 2017
Posts: 17,484
Likes: 2,773
From: Northern Ontario
I guess I didn’t hit post on this earlier this afternoon..
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That’s a nice rig.
“My question is can i just use manual locking hub from ttb50 so the spline can match with the short outer stub/axle or do i need to change out knuckle and spindle or anything else”
Sorry, I missed your specific question in the first post. AFAIK, the hubs are different from the 44HD and the 50 - no, the locking hubs from a 50 will not fit a 44HD.
I’d call torque king, see what they have available. They might be able to get the axle shaft you need.
Off topic, but another member on here built a hybrid between D44 and D50. Might be worth looking into, or swapping out to a more common D50. Seems to be a lot of those still out there, and parts for them. Although it looks like yours is coil sprung, not leaf’s. Carrick customs or Solo Motorsports have kits for those, might be worth your time to look into.
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Yes, the Dana 50 is the same as the 60 from the hubs outward.
——————
That’s a nice rig.
“My question is can i just use manual locking hub from ttb50 so the spline can match with the short outer stub/axle or do i need to change out knuckle and spindle or anything else”
Sorry, I missed your specific question in the first post. AFAIK, the hubs are different from the 44HD and the 50 - no, the locking hubs from a 50 will not fit a 44HD.
I’d call torque king, see what they have available. They might be able to get the axle shaft you need.
Off topic, but another member on here built a hybrid between D44 and D50. Might be worth looking into, or swapping out to a more common D50. Seems to be a lot of those still out there, and parts for them. Although it looks like yours is coil sprung, not leaf’s. Carrick customs or Solo Motorsports have kits for those, might be worth your time to look into.
—————
Yes, the Dana 50 is the same as the 60 from the hubs outward.