Installing my new Diff

on a F you always can find something wrong

 

We know that an incorrect pattern will lead to excessive tooth loads on the ring/pinion.


Question:

Does an incorrect correct pattern cause any unusual loads that may lead to premature failure of the diff housing?

Perhaps it puts a higher thrust load against the crown gear(?) - which then causes the diff housing to go thru a higher cyclical load with each revolution of the diff.

Thoughts?


Rgds,
Vincenzo

 

is this tool the new mechanical mouse for the computer?

hope this will work to loosen the last nut? it looks not so strong. for to loose may be it will work, but to tighten later this nut right - I doubt

 

qwaz...

The thread is getting a bit difficult to follow without more pics. If you have the time, more pics would really help those of us with more questions than answers.

Am trying to figure out which is the main shaft vs the lay shaft in your pic.
Is the lay shaft & pinon the top or bottom shaft?

Are you trying to pull 'just' the lay shaft or will both need to come out?

Presumably your tool was designed to pull nut #16 on the lay (pinon) shaft.... and now that you have pulled nut#16 you are stuck for ideas.... is that correct?

Thanks for your insight - wish I could offer up some solutions.

Rgds,
Vincenzo
Image Unavailable, Please Login
Image Unavailable, Please Login
Image Unavailable, Please Login

 

nice that your tool has not broken. so good material?

now you need a piece of aluminum and a big hammer ( 2 kg ) and loosen the shaft where the pinion is on. ( no 1 shaft on the parts catalog, layshaft ). there the bearing no 23 is very firmly on the shaft and sometimes it is hard to loosen. so don´t give up but take a piece of aluminum that you don´t destroy the end of the shaft where you knock on. this shaft is going out to the backside of the gearbox. as soon as this shaft is loosen you may remove this shaft completly. you may use again the aluminum and the hammer. good what be if you have 4 hands two for holding the aluminum and the hammer, the other 2 for holding the shaft when it comes out.

then you may knock a little on the other shaft ( main shaft ) that the bearing no. 19 may fall out. this is a 3 piece bearing. the inside have 2 rings and the outer one may fall out. then you can remove the outer ring.

I can not remember exactly all what to do when you disassemble the gearbox, but once the pinion shaft is loose you may see how it works.

important is as I mentioned before to remove the little allen screw ( 3 mm tool is neded ) for the reverse gear shaft and remove this shaft. otherwise you can not remove the gearbox input shaft right. the reverse gear may fall down, also the shims. you don´t have to care about those. this reverse gear shaft has a female thread. this thread is NOT an usual thread. as I remember it is M10 x 1,25?? but not sure. but you only may put a screw in for not even 1 turn. this shaft usually comes out easy.

good luck

 

Thanks qwaz! That helps a lot.

Rgds,
Vincenzo

 

Instead of beating on the lay shaft - can you get a puller under the pinion?

Just a thought....

Rgds,
Vincenzo

 

you may put a puller under the pinion if there would be some more space. but then may be the teeth will get damaged? too dangerous I would say. also you need then a second place where you support the other part of the puller.

but you also could go with the whole gearbox on a hydraulic press and press this shaft out. but with a press I never did it. only idea from me

 

hey scott,
good job

and this idea from me with the press I think I will do so exactly next time.

about the main shaft: sorry please, I don´t know and also don´t remember. when I see something and don´t know who to get it out I think all over and then it works. but after this it is hard to remember for me. because I mostly do things what I think it is right or it has to go so.

you have removed the reverse shaft? if not you can not get the mainshaft out. I´m not sure but I think the mainshaft I put out to the front??? but not sure

if it is not such a hurry I will look on sunday on my gearboxes I have here decomposed. may be I remember when I see?

 

as I have written here before:

remove the allen screw on the top of the gearbox, you need a 3 mm allen key, then you can pull out the shaft and the gear will fall down. that is all. one of the smaller problems I would say

may be you can not find this screw. it is covered with silicon. have a look at the top of the gearbox and you will see. otherwise I will make a photo of the thread on sunday where the screw goes in.

 

on the backside this reverse shaft has a thread. put a screw in and pull all out