924Board.org

[ThomasJoseph315]

Anyone got a good read with pics about replacing the input and output bearings on a 4 speed manual?

I am fairly certain it's time to replace the input shaft bearings, it's not shot but you can hear noise on acceleration on 1st and 2nd and less on 3rd and 4th.

[fiat22turbo]

The FSM has the instructions and PET should have the part numbers for the service parts.

Of course ditching the 4-speed for the 5-speed isn't a hard swap and parts are a bit more readily available since they share more internally with the 944 units.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

[Grenadiers]

Does it sound like it's coming from one side or the other, down the middle? If the sound is more from left or right rear wheels, could be a carrier bearing going out.
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'83 944 Track car.
'88 924S Track car.
'89 944 Turbo
2004 Winnebago Vectra monster RV
2012 Jeep Wrangler
2014 Kia Soul
2001 Ford F350 powerstroke

[fiat22turbo]

Not to mention it could also be the Torque Tube bearings.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

[Nobbi]

Keep the 4 speed, its faster and keeps the car original.Eyerything else is throwing money away....The early original cars are getting rare and prices do climb fast...
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NA 924 - april/1977- 4-speed-audi gearbox.
500.000 km with fun.....and new toy:Porsche 944 S2 Cabriolet.Other car Daimler c-class cabby,brandnew..Plus : DEUTZ 4005 tractor Built 1967

[ThomasJoseph315]

Well,.. It's really only sounding when I hit the gas on acceleration and moving. When I sit in the drive way with the clutch engaged with the car in neutral it doesn't do it, that kinda makes me think it might be a wheel bearing, but then again maybe it's the input shaft and only does it under load. It's really hard to hear. It sounds like a whirling sound.

[ThomasJoseph315]

Can I use this for the rear wheel bearings?

http://www.harborfreight.com/fwd-front-wheel-bearing-adapters-66829.html

[ThomasJoseph315]

http://www.paragon-products.com/kb_results.asp?ID=60

[fiat22turbo]

http://www.clarks-garage.com/shop-manual/susp-09.htm

Also, some interesting info here:

http://www.924.org/parts/parts.htm
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

[ThomasJoseph315]

I'm thinking I am just going to replace everything,..

Bearings (inner and outer), all bushings for trailing arms and the CV axles.

How many bushings are there total?

[ThomasJoseph315]

So I crawled under the car and I grabbed the CV shafts. On the drivers side I can hear metal to metal clanging with I shake it vertical. When I twist I get the same thing. The passenger side not as much but a little is there. If these CV shafts are original on the car I'd say that's damn good engineering to last so long.

The Noises I get vary, I'm trying to figure out what is going on with the rear end. I think the whirling sound might be from drums needing to be turned/replaced. Sometimes I get a feeling the gear box maybe sloppy too, but after feeling the CV shafts I am going to start with those as they are prolly 40 years old and wouldn't hurt to replace them anyway. between all the possibilities it sounds like a jet engine reving up on acceleration, which normally would sound kinda cool, but obviously there is mechanical issues going on. So I'll start with what I see and hear and go from there. I got a feeling I'll need to replace everything eventually, but for now I start with these.

I posted a special tool for bearing race removal, but be honest,.. do I really need that thing? If I had a later 944 with a solid 2-3" bearing across the control arm I would say yes, but as anyone changed the rear bearings with hand tools?

Thanks for the help!

[ThomasJoseph315]

Turns out it was exhaust and transmission. Got a new exhaust and refreshed trans fluid and poof! problem solved!