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712edf wrote: ↑

Wed Jan 03, 2024 5:50 pm

The whole pinion angle debate comes from the divorced vs married transfer case set-ups. 74 & back were divorced, meaning it is not bolted directly to the transmission, sets much further back from the front axle, uses a longer front propeller shaft and the axle differential is angled differently than later axles.

1975 & later trucks all had married transfer cases.

Ironically the cut off for front drum brakes vs front discs is pretty much the same time frame. 74 & older used drums, 75 & later predominately discs.

By "modern" I meant 75-93, even though 75-79 were the full time years & 80-93 would be better choice for a swap.

Bucky

What does a 1975 W 600 use? Front discs? divorced transfer case? Would this stuff be too big for a 1 ton?

nutz wrote: ↑

Wed Jan 03, 2024 10:01 pm

its kind of odd that having the divorced t-case would have a steeper angle over a non divorced
does the non divorced use in c/v type front drive shaft?
would think with the longer shaft they could use less pinon angle
but anyway if you where going to shim the axle to align the pinon angle you would mess with the caster

The driveshaft wouldn't be at a steeper angle. The u joint between the axle and driveshaft would be at a steeper angle, due to the axle being tipped upward.

soopernaut wrote: ↑

Thu Jan 04, 2024 6:31 am

The driveshaft wouldn't be at a steeper angle. The u joint between the axle and driveshaft would be at a steeper angle, due to the axle being tipped upward.

Yes, but the longer the drive shaft the less that angle is. A divorced t-case that is further from the axle would have a lower UJ angle, pinion angles being equal. Basic geometry....

soopernaut wrote: ↑

Thu Jan 04, 2024 6:31 am

What does a 1975 W 600 use? Front discs? divorced transfer case? Would this stuff be too big for a 1 ton?

There were two front axles offered in 74-77 W600s. A Dana 70F (6.17 ratio) with drums & the higher capacity Rockwell FDS7500 (6.80 ratio) also with drums. Mine has the Rockwell.

Both are considerably larger than any 1 ton stuff. The drums are about 16" diameter & the bolt pattern is 6 bolt on 8.75" Budd style split ring wheels. We talking Duece & half military sized stuff. The W600 Dana 70 only has the center section & housing in common with the 1 ton Dana 70F.

The transfer case is divorced. Rockwell T223 (1.96 low range) with rear parking brake drum. The T223 makes a NP205 look puny.

To put the W600 drivetrain under a 1 ton frame you may as well use the much more common military deuce & half or 5 ton top loader axles. Much better aftermarket support. This is essentially monster truck components.

Bucky

PwrWgnDrvr wrote: ↑

Thu Jan 04, 2024 11:02 am

soopernaut wrote: ↑

Thu Jan 04, 2024 6:31 am

The driveshaft wouldn't be at a steeper angle. The u joint between the axle and driveshaft would be at a steeper angle, due to the axle being tipped upward.

Yes, but the longer the drive shaft the less that angle is. A divorced t-case that is further from the axle would have a lower UJ angle, pinion angles being equal. Basic geometry....

I should clarify, if I can stay logged in long enough. I was referring to the u joint angle when using a divorced transfer case with a disc brake axle meant for a truck with a married transfer case. I assumed that was part of the question. You'd probably have the same issue using a married transfer case on an original drum brake axle as well.

Yes this website is like a game show, get to get your posts in before the buzzer sounds & you're error coded out

I honestly think any axle can be made to work with any transfer case, just takes some fanaggling to keep angles close enough to eliminate vibrations.

Bucky

712edf wrote: ↑

Wed Jan 10, 2024 4:56 pm

I honestly think any axle can be made to work with any transfer case, just takes some fanaggling to keep angles close enough to eliminate vibrations.

Aren't there shims made to correct that angle?

shims are to get the right caster angle
i would think some where around a 4 " lift might get the angle right ...then a c/v type (double u joint ) might get the angle right
the rear could be shimmed

Shims affect both caster & pinion angle.

The proper & most top notch way involves rotating the differential while keeping the knuckles & spring perches the same in relation to the ground. Custom 4x4 shops do this type of thing.

Bucky