G50 Shifter poping out in 1st and 2nd

The snow is on it's way and that means gravel and sand on the street. I'ts time to start some winter repair projects so I won't be tempted to drive and get sand blasted.

I have read all the previous threads on trans issues and can't seem to find one that addresses my symptoms.

I have an 89 G50/50 / 89,000 miles/Clutch replaced at 62,000. It will up & down shift smoothly except under high torque situations. Under hard acceleration in first gear when I disengage the clutch, the shifter will pop out of gear with a significant slam (It is not so powerful it can't be held in place). It does the same in second only with slightly less violent movement.

The shifter will not pop out on it's own under hard accelerating and decelerarting in the same gear. I experinced this in a Jag and Austin Healy with bad syncros.

At a driving seminar the mechanic suggested I change the motor mounts to reduce twist on the linkage. Changing to sport mounts seemed to help, it also could have been just my imagination hoping my time and money was well invested.

After reading all the treads, I have no choice but to drain my fluids and move up to Sweepco....I don't think it will help this issue, but it should avoid some others in the future.

Suggestions would be appreciated.

Todd

Try adjusting your shift-coupler first!
It worked at least on my car...

Jens
'76 CIS with '73 body conversion

I think the Swepco is the way to go. It makes shifting easier. If your problem is that your not completely engaging your gear,ala gummy oil,the Swepco will fix this problem. If the problem is worn synchros. You'll know for sure after you put in Swepco because the gears will grind do to the better lubrication. i.e. the synchros can't "grab" the gear to synchronize it. At any rate it's easier to "feel" what your doing with the shifter.
Bobby

I also have an 89 911 and have noticed certain conditions with the G50. The car does not pop out of 1st or 2nd but can easily be disengaged by inadvertently bumping the shifter easily. Under hard accleration, the shift from 2nd to 3rd can cause grinding unless the clutch is completely depressed and the shift done slowly and deliberately. This usually only happens on the track. This car has seen alot of track use by me and its previous owner. I think a tranny rebuild and new gear ratio's are in the future.

You are not disengaging the clutch fast enough. Your hand is faster than your foot. The reason its popping is because there is still load on your synchros when you move the shifter. The dog teeth are designed to stay locked under load and if you force them they will pop. kinda like if you just yanked on the shifter without using the clutch. UOCH! How's your clutch cable ? A little stiff ? Too much free play ? These things can slow down your clutch disengagement. This is a much bigger problem on the 915 trans from 72-86. I was going to mention motor and trans mounts as well but you took care of that already. Have you done the clutch fork update if applicable? Just some suggestions.

Thanks for the input. I planned on looking at the clutch fork adjustment--no cable though, it's a hydro system. As for the hand being quicker than the foot, I know that's not the case...if I don't have my hand on the shifter holding it in place and disengage the clutch it will pop out of gear on its own...maybe it wants to be a tiptronic. Good input thought.

Thanks for the all the input, I know it's awfully hard to ID the issue when you can't drive the car.

Todd

I was under the impression that it wouldn't pop out on its own. But going back and rereading your initial complaint, I think I understand. About the clutch cable thing, I was spacing out on that one. I know those things have hydraulic clutches, I guess I was up too late. That same popping out of gear on hard drag race style, side stepping the clutch at 5 grand type of starts has happened to me too. Wheel hop and shake, motor and trans twist, and improperly adjusted shift linkage come to mind. Transmission dog teeth wearing out would be the other thing. That type of thing will eventually destroy the dog teeth and it won't go into gear at all eventually. I would try the linkage adjustment as mentioned previously next. If that doesn't help it may be trans rebuild time (GASP!) Well good luck.

I don't know how similar your G50 is to my 915 tranny but this just happened to me...

Mine was getting very hard to get into 2nd, didn't synchro right in 1st and then proceeded to begin popping (with a BANG!) out of third (wouldn't stay in at all!)

Turns out that the linkage guide fork (don't know what it's officially called) had worked loose. Anyway, it was very simple to check and if the G50 has the same then this would be a good first look money-wise. There's a drain plate on the bottom of the tranny that allows you to get ALL the trans oil out (you can't check this without draining it all anyway --- mine needed changing and the gasket was leaking and the 90W oil was getting low anyway). When I removed the plate (thinking that that was all there was to it) I found that a fork was attached with three bolts to this plate. It was obvious that the linkage from the shifter went straight thru it first (I've rebuilt 911 engines but never worked on trannys before so I didn't know what I would find.) Anyway, guess what --- the whole thing was very loose --- one bolt and stud completely gone, one partially stripped, and the third was in the process of coming unbolted. Found the stud and bolt in the oil that I had drained into a pan when removing this. Replaced the stripped stud. Cleaned it all very well and put everything back together tightly with locktite to hold it in place. Put the shifter back into neutral and put the plate/fork back in, refilled with 90W and VOILA --- perfect shifting is here again! Hope this helps if the G50 is similar.

BTW, I forgot to mention that it was afterwards obvious that the reason it would pop out of third gear is that the loose fork didn't allow me to get it all the way into the third gear in the first place. The synchros are still not perfect (that will need a rebuild) but getting into 2nd is MUCH easier and third is perfect! NOW... I just have to break my badly developed habit of skipping over 3rd (going from 2nd straight to 4th)