60 series front drive shaft forward, backward, does it matter? (1 Viewer)

Spook50

My daughter likes Stitch
Supporting Vendor
Joined
Feb 16, 2005
Messages
6,248
Location
Spokane, WA
So I pulled my front drive shaft from my H55F 62 today to put in new U joints (preventative maintenance) and on checking the FSM I realized that it had been installed backward. Does it make any difference really, or not so much? I intend to reinstall (yes it's been marked for the sake of retaining balance) according to the FSM, but was just curious for the sake of, well, curiosity.
 

rhah

Admit it, your cruisers jealous
Joined
Dec 23, 2010
Messages
638
Location
ottawa, kansas
“Shouldn’t” I mean it’s been in there for years (assuming) and well your never mad bombing down the highway in 4x4

someone will pipe up and give some technical term of why the shaft is supposed to be bigger on one end or the ujoint is only made to rotate clockwise

but no harm no foul in my books.
 

60Works

60 Series Iron Works
Joined
Sep 28, 2009
Messages
1,549
Location
NH
I've seen them both ways on both shafts on trucks that didn't appear to have been altered since assembly in Japan.

I could see an argument of having the spline end down so water could drain. Early models will have the double cardan at the top.

Will be interesting to hear what others have seen.
 

Spook50

My daughter likes Stitch
Supporting Vendor
Joined
Feb 16, 2005
Messages
6,248
Location
Spokane, WA
Only thing I can think of is that if you flip a shaft with old u-joints, the wear pattern could maybe possibly throw things off a bit
Yeah it's getting new joints but it made me curious. This shaft was installed last May when I converted to the H55F so hasn't been on my truck for long, and I'm not sure what its orientation was on the truck it came off of.
 

georgebj60

SILVER Star
Joined
Jan 1, 2017
Messages
961
Location
Vancouver, BC
Not sure if these are of any help, and maybe you already have these, from the parts microfiches.

Screen Shot 2021-01-31 at 12.04.51.png


Screen Shot 2021-01-31 at 12.04.58.png
 

hj 60

JT1W0HJ6000960839
Joined
Aug 1, 2012
Messages
2,647
Location
Netherlands Hengevelde
Mine were also "wrong" but read somewhere that many dealers have no clue and slap them on without looking.
If you look at how a rock might hit them the factory setup seems most safe and clean.

rear diff fat, front diff slide:

2_722bf5a7b559d15e118ea556e6fe982b.jpg



2_cba15f16a14ee8a6e469bd0335732a82.jpg



2_86d02df21f5c2f98a59cccfe6895c7e3.jpg




2_35a1502d01cddd67dfda783e73bd72ae.jpg


But there is more conflicting FSM so to avoid damage and water/rust do whatever seems best:

2_16122ebec416d174aca13fd5523ed588.jpg
 
Last edited:

OSS

Joined
Jun 30, 2017
Messages
3,283
Location
Oblivion
It doesn't matter. Except that it's easier to lube when it's installed with the slip yoke near the axle. (The officials orientation). I've had it installed for 20 years one direction (backwards) and 10 years the other. Didn't matter except that that one grease zerk is harder get at
 

Spook50

My daughter likes Stitch
Supporting Vendor
Joined
Feb 16, 2005
Messages
6,248
Location
Spokane, WA
Mine were also "wrong" but read somewhere that many dealers have no clue and slap them on without looking.
If you look at how a rock might hit them the factory setup seems most safe and clean.

rear diff fat, front diff slide:

2_722bf5a7b559d15e118ea556e6fe982b.jpg



2_cba15f16a14ee8a6e469bd0335732a82.jpg



2_86d02df21f5c2f98a59cccfe6895c7e3.jpg




2_35a1502d01cddd67dfda783e73bd72ae.jpg


But there is more conflicting FSM so to avoid damage and water/rust do whatever seems best:

2_16122ebec416d174aca13fd5523ed588.jpg
Yeah that's what led me to wonder, seeing it like that when I was looking for bolt torque on the flanges. I also noticed I was missing two washers too. I think someone got a little rushed to finish the job and had a couple output flange washers fall off while they were zipping the nuts into place.
 

Users who are viewing this thread

Top Bottom