Dana 44HD differences from Dana 44LD - Ford Truck Enthusiasts Forums



1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Dana 44HD differences from Dana 44LD

Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 09-03-2012, 02:16 PM
nonrev321 nonrev321 is offline
Senior User
Thread Starter
 
Join Date: Oct 2011
Location: Panama City, Florida
Posts: 214
nonrev321 is starting off with a positive reputation.
Dana 44HD differences from Dana 44LD

Hello,

Trying to put together a rebuild stock for my Dana 44HD TTB (from a 1985 F-250HD). From what I can understand there are some differences between the Dana 44LD (GVWR <8500lbs) and the Dana 44HD (GVWR >8500lbs).

So far the only thing I've found (I think) is that the inner and outer wheel bearings are different. Is that all?

Can anyone advise on the differences between the Dana 44LD and the Dana 44HD.

Also having a hard time finding parts for the HD, Broncograveyard has some but not many. Can anyone advise on a good source for Dana 44HD parts?

Thanks, its appreciated
Reply With Quote
  #2  
Old 09-03-2012, 03:03 PM
Franklin2's Avatar
Franklin2 Franklin2 is offline
Moderator
 
Join Date: Jan 2001
Location: New Market, VA
Posts: 37,960
Franklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant future
Lower balljoints are larger.

The rotors are different with 8 lug(may be a different diameter too).

Calipers are different.

Housing is different. The hd is made for leaf springs, the f150 version(this is what you are calling the light duty) is made for a coil spring and radius arm. The f150 version also has longer arms, so I would assume the axles would be different lengths also.

The dana 44hd ttb was made for f250's, the regular dana 44 ttb was made for Broncos and f150's.
Reply With Quote
  #3  
Old 09-06-2012, 11:00 PM
nonrev321 nonrev321 is offline
Senior User
Thread Starter
 
Join Date: Oct 2011
Location: Panama City, Florida
Posts: 214
nonrev321 is starting off with a positive reputation.
Well after 3 days and probably 10 hrs of work heres what I found out and I'm still not sure its all correct.

1980-mid 1985: GVWR <8500 got the Dana 44
GVWR >8500 got the Dana 44HD
Any "Snow Plow" option had the Dana 44HD regardless of
GVWR

Mid 1985 - 1986: All GVWR got the Dana 50
The Dana 44HD got the 8 lug 6.5 pattern hub
The Dana 44 got the 5 or 6 lug (I can't remember which right now)

Comparing the parts list for the Dana 44HD and the Dana 44 (Spicer document X510-9, which you can find on-line and download) showed all parts the same except as follows:

1. Oil seal and Spindle bearing (The bearing on the inside of the spindle where the axle plugs in, item # 48, 49 & 50 in the parts breakdown)

2. The shafts themselves (Items #32 in the parts breakdown)

From what I have read the shafts are a bit beefer which would explain the different oil seal and bearings

I have also read that the LH and RH support Assemblies (the arms basically) are beefier. The parts breakout states as a note to contact the Mfg for part number so it looks like the Mfg could opt for different strengths so this might be true.

Rgds
Reply With Quote
  #4  
Old 09-07-2012, 04:08 PM
Franklin2's Avatar
Franklin2 Franklin2 is offline
Moderator
 
Join Date: Jan 2001
Location: New Market, VA
Posts: 37,960
Franklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant futureFranklin2 has a brilliant future
I think we might have a terminology problem here. You seem to group the "dana 44" in with the "dana 44HD" and the "dana 50". The dana 44 was found in f150's and Bronco's, and is different enough that I would call it a "different animal". I believe some of the center section(the part that makes it a dana 44) is the same between the two, but the dana 44 hd is found in f250's and is nothing much like the f150 front end.

I would group the dana 44(f150 frontend) by itself, and the dana 44hd and the dana 50 could possibly be grouped together(both f250/350 frontends).
Reply With Quote
  #5  
Old 09-08-2012, 01:32 PM
nonrev321 nonrev321 is offline
Senior User
Thread Starter
 
Join Date: Oct 2011
Location: Panama City, Florida
Posts: 214
nonrev321 is starting off with a positive reputation.
Hi Franklin,

Thanks for the info, I did find alot of conflicting data on this subject. I had read elsewhere that the Dana 44 was on the F250 with a GVWR < 8500 and the Dana 44HD was on the F250 GVWR >8500, but that the Dana 44HD was on both if the Snow Plow option was installed...

Its also a bit more difficult when doing research on the 1985 as it appears there where several parts changes in that year

Thanks
Reply With Quote
  #6  
Old 09-08-2012, 02:37 PM
burnout400m burnout400m is offline
Posting Guru
 
Join Date: Oct 2011
Location: Pueblo, CO
Posts: 1,177
burnout400m is starting off with a positive reputation.
I'm not the end-all expert but I'm pretty sure the D44ttb was only in the 1/2 tons and the F250's all got either D44HD or D50 as others have stated.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Large external Dana 44HD hubs on 78/79 high pinion 44? twinzilla 1973 - 1979 F-100 & Larger F-Series Trucks 4 07-11-2015 07:24 AM
Spline count 1985 Dana 44 Heavy Duty nonrev321 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks 1 02-13-2015 01:36 PM
dana 44 ttb hd parts on a solid axle d44 david.77 1973 - 1979 F-100 & Larger F-Series Trucks 0 09-27-2013 07:43 PM
Dana 44 hp interchange with dana 44 hd 8lug? BIGS003 1973 - 1979 F-100 & Larger F-Series Trucks 16 05-21-2013 09:19 AM
Dana 44HD TTB rebuild advise nonrev321 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks 6 09-02-2012 02:13 PM


Go Back   Ford Truck Enthusiasts Forums >

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -5. The time now is 06:11 AM.