Driveshaft Rotation - Ford Truck Enthusiasts Forums

1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck

Driveshaft Rotation

Thread Tools Search this Thread
Old 07-28-2003, 01:35 PM
catbird7 catbird7 is offline
Senior User
Thread Starter
Join Date: Apr 2002
Posts: 213
catbird7 is starting off with a positive reputation.
Driveshaft Rotation

I have a 1974 f-250 4X4 highboy with the front drum brakes and power assist steering. I am considering the purchase of a complete front axle assembly and steering box off of a 79 f-250. The 79 has a "high pinion" dana 44. This brings me to my question! Does anyone know if the front driveshaft rotation direction is the same for a 1974 f-250 (highboy) which has a low pinion heavy duty dana 44 as a 1979 f-250 with a high pinion dana 44????? Has anyone ever done this? Do all 79's have the high pinion front axle?
Reply With Quote
Old 07-28-2003, 07:55 PM
351coupe 351coupe is offline
Elder User
Join Date: Apr 2002
Posts: 589
351coupe is starting off with a positive reputation.
Driveshaft Rotation

They turn the same direction,and it can be done.I had a 75 f250 highboy crewcab with the same swap.
The term reverse rotation doent really mean that the shafts ae turning the opposite way.It actually refers to the way that the gears themselves are cut.
They are cut so that the strongest part of the teeth is where the pressure is applied while in 4wd on a high pinion axle.A high pinon axle is better for keeping driveshaft angles at a minimum,but it is basically an upside down rear axle with steering,so when going forward the pinion gear will be putting a lot of pressure on the weakest side of the ring gear.Therefore the solution was to cut the gears at the opposite angle,to put the pressure on the strongest side while going forward in 4WD.
Sorry if I wrote this in a confusing way,but I hope it helps.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Highboy Information Compilation zerfetzen 1973 - 1979 F-100 & Larger F-Series Trucks 107 02-07-2017 06:23 PM
F250 Dana 44 High pinion 78 or 79 Jules The Great WTB - Parts & other 0 01-16-2017 01:14 PM
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
Front axle swap 1jeffm 1973 - 1979 F-100 & Larger F-Series Trucks 2 03-05-2015 12:00 PM
63 to 78 F250 4x4 drivetrain swap Brad 61 1961 - 1966 F-100 & Larger F-Series Trucks 4 02-17-2005 08:45 PM

Go Back   Ford Truck Enthusiasts Forums >

44, 4x4, crankshaft, dana, direction, drive, driveshaft, f150, f250, ford, front, high, pinion, reverse, rotation, shaft

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 05:48 AM.