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Scott_Tucker Scott_Tucker is offline
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Join Date: Jun 2011
Posts: 18
1979 930 Turbo shifting issues


I have a 1979 930 Turbo that is having some shifting problem.

When you step on the clutch pedal and put into into reverse when you are stopped, it grinds going into gear like the input shaft is still spinning.

In addition, when you do quick upshifts (not bang shifting, but spirited shifting) it grinds going into second and third. It also grinds on downshifts into those gears.

We have replaced all clutch components including the flywheel, pressure plate, disk, pilot bearing, and throwout bearing. I suspect it is in the clutch because the input shaft needs to still be spinning in order for it to grind going into reverse. It seems like the clutch is not releasing all the way.

If it did not grind in reverse, I would have suspected it had bad synchros. It did not grind before we replaced the clutch.

We have tried swepco 201 85w/90, swepco 203 90 weight, and Redline lightweight shockproof oil. What oil is normally used in these gearboxes for best shifting?

Is this a common problem on these vehicles?

Any direction would be great.

Thank you.
Old 04-08-2014, 11:07 AM
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