308GT4 Gearbox Pan removal

The 3x8 transmissions are all essentially the same.

On the clutch end of the transmission case there are 3 holes, each containing a spring & steel ball. One of them also contains an Al spacer. These are all held in place by the transmission cover. You have to be very careful to catch them when removing the cover. Sometimes they stay in the holes, but usually at least the springs jump out.

Be ready with a cloth held around that end of the cover, and tilt the cover down towards the cloth. That way if they drop into the cover, they'll roll into the cloth rathar than onto the floor. Also not a bad idea to have a larg piece of old carpet on the floor to catch them before they disappear under something where you'll never find them...

Also a good idea to have a small pick-up magnet that will fit in a ~8mm hole to pull the balls out if they stick in there.

The balls provide each of the gear positions with that 'click into position' feel.

When reinstalling, coat the springs, balls, & spacer with grease to stick them into place while the cover's being positioned.

Sure hope we get the archive images back

 

tomoshea -- When 1st is being difficult, another easy test to try is: keep the clutch depressed and select one of the other forward gears (say 3rd) and then quickly (but smoothly) try selecting 1st. If it goes into 1st more easily this would point to some unwanted drag in the clutch assy as the root cause of your problem (rather than a problem in the gearbox linkage/mechanisms). Just a thought as something to try/evaluate before resorting to removing the gearbox pan.

 

Before removing the sump try this - with the gear lever in neutral, engage 2nd gear and note how far up the gate slot it goes, now pull it back into 3rd gear and compare the distance of travel - the distance should be the same.

Then remove the the gate (two screws) and select 2nd gear and rock the lever sideways to reverse then to 4th and again compare the distance of travel - the distance should be the same.

To correct any discrepances found adjument is possible by the adjusting bar # 10 in the picture, when making adjustments always put it in 2nd gear before undoing the locknuts (#25&26 in drawing) otherwise you may "loose" position of the select fork in the gearbox sump.

I would also check the condition of the bushes (#28 in drawing)

Hope this helps
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Here are the springs/detent balls to pay attention to when dropping the pan (these are on the driver's side/left-hand side of the gearbox):
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It really is no big deal to pull that sump cover. As everyone already said, be carefull of the springs and balls.

Here are some more pix:
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Hi Guys,
I know this is a very old thread but I'm stuck with getting my gearbox case pan lowered. It is different to the one previously described as it has the vertical fins (5 from memory) that rise from the inner side of the case. I can get the pan down about 30mm all round (clear of the 14 studs) but it seems to be binding on something and I'm concerned about forcing it.

This is a 1976 308GT4. The reason I need to do this is that I took the shifter and housing out and in trying to reinstall it found that the gearbox was stuck in a forward gear that I'm guessing is 2nd. The shifter will not move to another position. I've tried moving the transfer shaft under the car and cannot find any position for it that makes sense. I certainly can't select neutral.

I've benefited enormously from the forum archives here and gained a more detailed understanding of the workings of this and my 456GT. It's a great place to help you work out whether a job is within you capability or not.

Hope you can help with this one
Cheers,
Lee

 

Here is a illustration of my cover (3) and it seems to have studs (69) and nuts (70) on the top of the fins - currently hidden from my view. I've got no idea what they attach to - more reasons for caution.
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Number 3 is the engine oil pan. The gear box oil pan is above that (in the picture). You are not removing the right pan if 3 is what you are looking at. Look at the bottom of the oil pan, it should say Cambio Olio (for gear oil). That is what you need to remove. It has no fins.

 

Thank you - I think I'll just slink into the background now

 

Don't feel bad, man. We all have made MUCH bigger booboo. You needed an oil change anyway.

 

But you've broken the seal. You'll probably need to get it off to replace the gasket, right? My GT4's pan was the same. It needed to be rotated out, pulled down from the front more than the back and it did foul the sheet metal part against the front of the block just enough to erode confidence when pulling on it. Interestingly my QV pan dropped out like nothing even though I think they are all supposed to be the same parts. (Assuming you've taken out the dipstick extension, oil temp probe, etc.)

 

Thanks for the reply Brian - Yeah pretty much the same experience with having to tilt it down. It is a bit of test of confidence and commitment though.