5073 Transmission questions

[AlexR 2,317]

So I have been working on getting my transmission that has been apart for 6 months together again. Been waiting on parts.  

So while I was sorting everything out again I noticed I don't have a thrust bushing for the mushroom gear, I don't believe I ever did.

So I noticed in the manual it says on the 8 speeds to install thrust bushing if it had one. Meaning some don't? 

And the second thing I noticed is the 6 speeds don't show any thrust bushing for the mushroom gear shaft. Unless I am mistaken the 5073 has a unique mushroom gear as in it's all one piece but doesn't have the extra length the 6 speeds do for brake drum. It appears the 8 speeds it's a 2 piece unit.

 

Do I worry about getting a bushing or just run it since it doesn't seem it ever had one? 

I don't see any practical way to measure any play on the mushroom gear with the cases together either. 

 

 

 

Edited yesterday at 03:50 AM by AlexR

[Handy Don 15,337]

I can only note that the 5073 was a unicorn transition item.  It had what became the “8-speed" case but with a limited slip differential. Since the brake drum had moved to the other shaft, the ‘shroom shaft had to be shorter to stay inside the casing wall and not interfere with the brake!

My personal opinion is that the engineers decided the LSD was simply not strong enough to be a real market factor, especially on higher horsepower/heavier tractors and that the extra strength of the shaft-mounted pinion gears was better in the long haul. A further plus to the brake drum move was the faster-spinning brake drum that allowed somewhat better brake modulation!

[AlexR 2,317]

Well if I had done my due diligence and finished reading the manual 

 

It answers my question on Disassembly part 13.

 

"Remove the reduction gear assembly. 

NOTE: Prior to 1973 models the 
gear and thrust washer was welded together and
was serviced as one part. 

Starting with the 1973 models the pinion, reduction gear and thrust washer are serviced separately. The thrust washer goes on the stub shaft next to the big gear. The gear and pinion may be pressed in and out of the gear with a suitable arbor press."

[ebinmaine 76,040]

1 hour ago, AlexR said:

1973

 

Is also the changeover from Limited Slip Differential to the Open Differential. 

[AlexR 2,317]

I do have one more question so one of my axles is fairly worn at the snap ring I will try to make it work with a snap ring.

But if not, can I do a roll pin? does the 1.5" long roll pin interfere with the limited slip circle spring? I would probably do a 3/16 or possibly a 1/8 dia roll pin. 

Edited yesterday at 03:53 AM by AlexR

[ebinmaine 76,040]

I can't remember if there's enough space inside the Differential for a roll pin....

 

IMHO you be better off getting a known good axle from one of the Redsquare vendors.  

[pfrederi 19,336]

Some earlier WH gear trannys  5053 did use a roll pin.  you have to get the hole really close the end of the axles. 1/4   1-1/2" is the pin.  

 

 

[Handy Don 15,337]

13 hours ago, AlexR said:

I do have one more question so one of my axles is fairly worn at the snap ring I will try to make it work with a snap ring.

But if not, can I do a roll pin? does the 1.5" long roll pin interfere with the limited slip circle spring? I would probably do a 3/16 or possibly a 1/8 dia roll pin. 

I have no direct knowledge on this point, as do the above posters!

Be aware, though, that the pinion gears in the LSD “float" within their pockets of the diff bodies. The movement isn’t large but it is real. Factor that into your thinking!