My '72 E has the type 915 gearbox, but apparently retains the older gear shifter from the '71 and earlier models.

I have problems selecting 1st when stopped after a short period of city driving. Seems to select 1st OK when oil in box is cold, but becomes difficult after 15 mind driving. If I am in neutral at a stop light then go to grab 1st, I usually need to select 3rd/4th, then slip back to 1st.

It almost feels like the clutch is not disengaging completely but this car had a recent new OEM Porsche clutch kit installed.

All gear linkage bushes were also renewed recently. It has been suggested I install a shifter from a later model ('73 onwards)which has a more positive lockout mechanism (for reverse). Anyone had this experience ?

It has also been suggested there is oil leaking from the g'box shaft onto the clutch but I cant feel any slippage of smell burning oil? Would this inhibit 1st gear selection from a standstill ?

 

This sounds more like a problem with the throw-out bearing. If your TO bearing is old or bad,it makes shifting difficult, giving the shifter a very stiff feeling and making it difficult to engage. I had tis same problem on a TR, and it got worse after the car was warm, same as you are experienceing.

Check that out next.

Cheers

 

Hi Bushrod,

thanks for the tip, this could be the problem. Any other tell tale signs (or sounds) I should look for to confirm the thrust bearing is the culprit ?

 

better ask a few more questions, where is you first gear on the shift pattern? I don't believe you can shift a 915 with a 901 shifter, and unless someone had done some serious pounding on your body pannel between the two rear seats to fit the 915 in there, you still have a 901.

I put a 915 into my 1970 and I had to cut out the hump between the seats and weldin a later years one to get the trani to fit. so check these things out to get a solid basis for going forward.

Jim