Gearbox issue, Am I in for a rebuild? Options

[TRS63]

I had that issue when I bought my car. It was bushings. Especially the bush on the transmission. Also, realized that going from 2nd to 1st needs to be steady pressure while the car is slowed down to a steady jogging speed. Any faster and it will bind.

I was hoping something like that but truth be told, all my bushings were replaced not long ago. First inspection lying on the floor showed nothing there but I will inspect it better on the lift! Thanks!

@TRS63
Would you mind adding your car info to this thread?
http://www.914world.com/bbs2/index.php?s=&...t&p=2969526

Is your car an original German spec or a US import?

Would have been a pleasure to contribute but in fact..my car is already in the list (4742920421), as I did contribute to the original post (IMG:style_emoticons/default/smile.gif)

Bests

Antoine

[KELTY360]

You should be able to select 1st gear while rolling to a stop or going slow- I can. Good luck, Michael (IMG:style_emoticons/default/beerchug.gif)

Agreed on this. Right as you're about to come to a stop, but while rolling, you should be able to slip it into 1st.

(IMG:style_emoticons/default/agree.gif)

I also agree with those who would focus on a clutch adjustment. Could be a simple and effective fix. You'll need a couple of 11mm wrenches.

[wonkipop]

i dunno.

i never force mine into 1st on a downshift. because i never go there if i can help it if rolling. i adhere to the f piech plan of mass destruction and stay in the H pattern while rolling along.
but if forced to stop at those things that are illuminated i just pull up and slip it into 1 while stationary after a slight pause.
or gun it through a give way sign in 2 having determined there is nothing of similar mass i will run into.
i don't really do the go slow enough to drive in 1.
must be a european street scale thing? pottering in 1?
down here in australia we don't do that as a general rule.

if i don't wait for the gearbox to do whatever its doing before i go get reverse i will get a crunch.
i always wait with the clutch in for a second or two before going for r from 1 via n.

your clutch probably needs adjusting.
and your gearbox is probably half farked.
but it is half a century old.
just drive around it and keep driving.
its not as bad as a jaguar. even new those cars didn't know what gear selection was.
(IMG:style_emoticons/default/beerchug.gif)

[r_towle]

Because 1st gear has no synchro, the only way to put it into 1st is having the gears line up. That is luck and timing while you are moving.
I don’t try, nor do I try on my 911/915
It’s a pretty useless gear 0-15 mph…..so I wait until I am not moving to put it into 1st.

I agree you should adjust the clutch, it’s yet another cable that stretches, and can get loose in the tunnel, and needs attention at least annually.

[peteinjp]

I actually slide into 1st just before the car stops to be sure things are lined up. Then after stopping go to neutral and wait for the light etc.

My needed adjustment was the pedal stop. I had it too high and with the car stopped it was impossible to get 1st or reverse without a “grrrranch.”

Pete

[Dave_Darling]

I'm pretty sure there is a synchro on 1st gear. At least, when the box was built there was. Might not be by this point in a lot of cars, but ....

--DD

[TRS63]

So, I put the 914 yesterday on the lift :

(IMG:http://www.914world.com/bbs2/uploads_offsite/www.thesamba.com-24690-1678433473.1.jpg)

What I did:
-clutch adjusted (and clutch tube checked, but all fine there, I welded it right last year !)
-Oil level checked
-bushings checked (all still good!)

And sadly no improvements..still no issues with any gear change except the 2nd gear grinding 2-3 times out of 4, either by down- or up-shifting.

Well, I think it will need a rebuild for its 50 years, will start that when my beetle is back on the road (interior renewal currently) so that I don't stay without a fun car (IMG:style_emoticons/default/smile.gif)

Bests

Antoine

[bugat5speed]

Hi,
can it be that you mounted the "Sperrband" (sorry don´t know the English word for it) to the wrong side? If you look on the gearwheel it must be placed on the right side of the gear. I have an old 914 manual where it is shown on the left side, what is incorrect.
Once more: 1st gear has a synchronization for downshifting and these cars were built for racing. And depending on the course it was necessary to shift down into 1st gear and nobody would have spent time to wait until car stands to shift into 1st!!!
The gearboxes that leave my house allow this.

Martin Bott
Bott Fahrzeugtechnik
www.bott-fahrzeugtechnik.de
Instagram: bott_fahrzeugtechnik

[930cabman]

Just love your ancient barn, but not too weather tight

[mlindner]

I'm with 930cabman, that is a grand barn. Love it.

[nihil44]

Antoine,

You mentioned in post #13 in this thread that the " pointy screw" / cone screw was loose and you re tightened it. Did that make any difference?

I had similar symptoms to yours. Adjusted the shifter, tightened the cone screw, went for a drive, all good until after a number of shifts I had to stir around to find 2/3. Got home and found cone screw had worked itself loose only by half a turn but enough to throw the whole adjustment out.

It seems as though I appeared to have the cone screw adequately tightened but I suspect that the tip of the screw had hung up on the taper a little and was not allowing it to seat fullyand it worked its way loose. I backed off the screw, jiggled the shift rod around and re tightened to where I think the screw is fully seated. Got back all gears.

I have subsequently fitted a new cone screw with its nylon button and added some blue Loctite for good measure

[930cabman]

Antoine,

You mentioned in post #13 in this thread that the " pointy screw" / cone screw was loose and you re tightened it. Did that make any difference?

I had similar symptoms to yours. Adjusted the shifter, tightened the cone screw, went for a drive, all good until after a number of shifts I had to stir around to find 2/3. Got home and found cone screw had worked itself loose only by half a turn but enough to throw the whole adjustment out.

It seems as though I appeared to have the cone screw adequately tightened but I suspect that the tip of the screw had hung up on the taper a little and was not allowing it to seat fullyand it worked its way loose. I backed off the screw, jiggled the shift rod around and re tightened to where I think the screw is fully seated. Got back all gears.

I have subsequently fitted a new cone screw with its nylon button and added some blue Loctite for good measure

Yes, it is recommended to use a new cone screw everytime.