Transmission Question

[blurple124]

Now that is a book I would read!

[moggyman64]

What are you going to do with your transmission blurple 124, repair it or leave it?

BEEK, A little while back I realised what caused my problem, my engine and transmission are fitted in a different classic car and I have realised what has happened. I had the transmission rebuilt 2 years back with new bearings etc, thats when I rebuilt the engine. I have noticed that the engine is fitted with a slight cant backwards approx 10mm front to back so that means that the transmission is out of level, therefore the transmission oil is falling towards the rear of the transmission and not lubrication the the front bearings ie, input shaft etc. Am I correct in thinking that with the transmission in this pisition that the bearings would not be adquatly lubricated?
I had 15/40 oil in when I heard the noise after approx 1000 miles so altered the necessary mounts to get the transmission level and replaced the oil with 20/50 but hasnt made any differance.
So based on the symptom described earlier in the thread ie. the noise is there in neutral and related and louder with engine revs with cluth pedal out and disappears when pedal is depressed, which bearing(s) do you think I need to replace in the transmission. Do you think the layshaft bearings would have been lubricated as they sit lower than the input shaft bearing?

I have the engine and trans out of the car at the moment so it would be a good time to tackle this. IIs it possible to get to the input shaft bearing by removing the bell housing and the next section that the bell housing bolts to or do i have to take the whole transmission apart? if so do all the parts stay in place to allow you to disssemble them, in other words do bits fall out when the casing are seperated?

Thanks for any help you can provide

keith

[BEEK]

there is a spring washer in the bellsousing, thats all that will fall out. the detent pieces and springs and balls need to be kept up with. as well as the small bearing that locates the speedo drive. if you pay attention to detal, its real easy. i do wory about your selection of lubricant for the gear box, needs to be 90wt non ep.

the fiat engine assembly sits canted to the rear anyway. no 10deg wouldnt have starved a bearing, but imporper lubrication might be the issue

[azruss]

all your tranny lubrication is splash lubrication, so the angle is not an issue. Using a proper oil and proper amount is an issue.

[moggyman64]

Thanks Guys for the comments,

If you both dont think that the engine cant was causing oil starvation therefore no damage to the bearings.

Do you think it would be worth trying 90wt oil before doing anything with the bearings to see if that will sort out the noise, as I said the bearings aren't very old. Maybe the oil is too thin and thats why I can hear the noise.

I am in the UK and was told to use 15/40 oil. Then on another forum I was advised to use 20/50

When I got the transmission back after the rebuild it was dry so I sat it level on the bench and filled it til the oil came out of the side filler plug, cant remember how much oil it took, is that correct? or am I supposed to tilt the transmission forward or backwards a little whilst filling?

Regards

Keith

[djape1977]

15w40 is just fine.
should overfill, forget what factiry said about that one, 1.8 liters is the right ammount.
unfortunately, or fortunately, depending how you look at it, bearings are the same as for lada. that means that there are plenty out there but some are made out of brown stuff. how to tell which oneas are good? only by experience.

[moggyman64]

Not sure what to make of your post Djape

Keith

[4uall]

Keith, this might help

http://wwwe.fiatspider.com/f08/viewtopi ... ansmission

[moggyman64]

Thanks 4uall for the link, the link relates to the query I raised in my earlier post regarding filling the transmission when dry after a rebuild, I have bought some 90 wgt GL1 oil, do I put in a quart and tilt it forward on to bellhousing or onto tail and wait for a bit and then return to level to continue filling?.

If you were betting guys...do you think the noise is down to the oil or shot bearing(s)... what would you do in my shoes, bearing in mind ( forgive the punn) that the engine and trans are out of the car at the moment but I dont want to spend money unecessarily doing bearings etc, bit of a catch 22. Whats are your views.

What are the cost to replace the bearing(s)

Put yourself in my shoes

Keith

[4uall]

If it were me, I would start at least expensive then go to most expensive. I would drain what I had, use correct oil fill (as per instructions) then go from there

[moggyman64]

Thanks Jay,

Anyone else go along with that before I reinstall the engine and tranny and can someone tell me which way to tilt the transmission when filling or does that not matter anymore because I have been running the car? does that only matter when dry?

keith

[BEEK]

note the difference in runner height between the first and last cylinder. this is the best way i can show you the angle which this motor sits in the stock chassis, as i cannot find my digital level

[majicwrench]

If a bearing is already noisy changing the fluid aint gonna fix it.
You're overthinking this filling trans thing. Just have it level.
Keith

[moggyman64]

Ok guys, lets forget the oil for now, As said by majicwrench if the bearing is making noise then oil is not goin to fix it, point taken, so I will bite the bullit and replace the bearing, but is it likely to be just the input shaft bearing that will be the causing the noise described earlier?????? How can I check/test the bearing(s)? I bet thats not easy for a novice.

Ps, the pilot bearing was replaced when the tranny was rebuilt.

With regards to the oil when the bearing is sorted I will fill the tranny with 90 wgt GL1

Thanks and keep it coming guys , were nearly there.

keith

[BEEK]

unfortuneatly, you are going to have to visually and physically inspect each bearing. there is no other way around it