Swapping the output flange is a simple process...just undo the big nut on the end... They all have the same spline and outside diameter...

For the time involved, I'd bet a full tranny swap will take about the same as an o/d swap and your not dealing with any funky gaskets. Just my opinion but I'd rather leave it as a complete unit...

Dale's first double post!

It's really strange, Greg. A clutch is most likely to slip in top gear because all the torque is getting to the transmission without any being spent on acceleration. The worse the clutch gets, the lower the gear it will slip in.

Conversely, the overdrive is BEHIND the transmission, so the torque multiplication of 1st gear is more likely to make the OD slip than the reduced multiplication of 2nd gear, 3rd gear, etc., no matter how heavy the flywheel is (to a point).

If it's your clutch that's still slipping, it's slipping pretty easily, and because it's slipping so easily it might not generate enough heat to really stink up the joint.

If it's inside the transmission itself, first of all it would make a HORRIBLE noise, second of all it would only happen in one gear. It would also not happen in 4th gear, guaranteed, because that is a direct drive (no gears are harmed in the making of this speed).

Again, if it's the overdrive, it'll happen worst in first, and possibly wouldn't transmit any power at all in OD. I've driven an overdrive with a wrecked one way clutch, and that car would only go forward in the first 4 gears, but it would go forward in those gears very well. OD and reverse didn't work at all.

You've got a decent clutch cable? It's adjusted properly? Your transmission isn't leaking fluid at all (up front, where it can get on the clutch)? You haven't monkeyed around with the clutch linkage, have you? You're sure you're only slipping at 3 psi and not 13 or 30?

I love you.

Oh, I know whats wrong with his clutch...

Starts with a C ... rhymes with lutchnet.

Can you guess it?

- R

F&S = Fitchel & Sachs, not Clutchnet. Sounds an awful lot like the problems Andy was having, tho.

all i have to say is working on transmissions sucks

does anyone have any luck in this group?

ciao

Heh, not here. My car is on its fourth, soon to be 5th gearbox and 3rd clutch in 40K miles. Though 4 of those 5 worked perfectly fine. I retired the 2nd M46 before it granaded, about to retire the getrag in favor of a freshened up getrag hopefully with closeish ratios, but it works fine. About to retire the clutch in favor of a flat flywheel and flat flywheel pressure plate.

Yeah, so far no luck here for me either!

Thanks everyone for the responses.
Dale....so swapping the flanges on the back can be done. That's good info if it comes to that. Thanks.
Matt, thanks for the explanation of how all that stuff works. It makes more sense. Hmmmm, so because its not slipping in 1st doesn't mean the clutch isn't bad. Okay. The car does slip through all the higher gears (and not in 1st or reverse), including 4th, which means its unlikely to be the OD? As well, there is no nasty noise coming from the tranny.
My clutch cable is newer, and appears to be in good shape. I haven't fiddled with the linkage by the pedal. I took apart the throw arm on the tranny to clean it up and install the release bearing, but I'm pretty sure that's all correctly installed. I did adjust the cable...the manual said just a few millimetres of play on the little arm before engagement. I may double check that....
The tranny isn't leaking up front...it was dry in the bellhousing when I took it out. As for boost....the controller is set to 7psi, but I suppose if my gauge is reading wrong, it could be boosting way more. The car is pinging like a banshee....
What did Andy do to fix his clutch issue?
Thanks again everyone for the input.

How long and how much have you driven it, Greg? Maybe it's just a break-in issue. I'm still confused as to why it was doing it in the first place...

I've maybe put about 50 kms on the car since the turbo swap. Not much really. I've maybe driven the car 10 times at the most.

I just got back from another drive...confusion prevails. Drove it slow until it warmed up, and then gassed it. Of course it slipped in 2nd and 3rd, at an indicated 3 psi.

After filling up, I pulled away from a set of lights with light throttle...barely even touching the gas, and I felt it slip....and really bad, in 1st gear. Next light....same thing, and it took about 40 feet for it to catch. At that point I was still at 10 inches of vacuum. It has never slipped in 1st. And especially not in vacuum still.
Then when I gassed it a bit, the whole car was shaking. At about 10 km/h in 1st, the whole car would shake...my passenger Sparco was vibrating violently, while it was slipping. It felt as though it was coming from behind me. And then something would catch. It feels like its coming from the back of the car because as soon as it would catch, I could feel a thud from the back of the car, and the vibrating would stop. The thud was quite noticeable.
And then right after this, I pulled through first at an indicated 8psi, then through second and third at 9psi up to 100 km/h with ZERO slipping. I did this again immediately after without issue. And then pulling from a start again, it slipped all the way through 1st, 2nd and 3rd with only partial throttle, still in vacuum.

It is intermittent....and now affecting 1st.
Maybe my rear end is blown out? It feels like its from the back...

Confusion prevails.

i havn't done anything to fix my clutch to be honest. I still can't do a proper launch if its slightly cold out or else it will slip but it is grabbing just fine in every gear. Based on that though I feel that it's my pressure plate not having enough clamping force, so I have to take it off and send it back to get redone. The only problem is, I don't have another pressure plate to put in there for the time being until I get the PP back, and I need to drive my car to work so it havn't been done.