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A 833 Trans pops out of 2nd & 3rd gears

Should be playing golf

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I've changed everything!!! Guys at Passion are scratching their heads, among other things. What could be the issue?
 
Popping out usually means pressure somewhere. Did you dial indicate the bellhousing? Has the engine been align bored? Blocking rings in properly? Did the sleeves move freely by hand before you put the cover on?
 
Popping out usually means pressure somewhere. Did you dial indicate the bellhousing? Has the engine been align bored? Blocking rings in properly? Did the sleeves move freely by hand before you put the cover on?
bad synchronizer rings will do that with trans as well.
 
Im going with linkage,
 
What about shifter stops not adjusted right. Not happening 1st and 4th ?
 
Sure you have the correct shifter or operating levers?
 
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What do you mean when you say, "I've changed everything...?" Jamie Passon is extremely thorough so that's why I would not think it was a parts-related issue like a synchro or shifter, etc... if he has looked at it and/or rebuilt it. Did you install the trans in the car? That's why I'm suggesting linkage adjustment as that would be an operation performed after installation of the trans. There is always the possibility of a defective part but again, I would be confident that Jamie would have caught that...
 
Sounds like linkage, more sensitive than you would think every turn is important, if it is a hurst start over put pin in and follow instructions, like he said if Jamie went through that trans, my money is it is good
 
I had this problem with third gear after a rebuild, turned out to be linkage adjusted one turn too short plus stop bolts not backed off properly. Easy fix and no more problem.
 
I would suspect bell housing run out not correct , or pilot bearing to loose. Check the shifter stop bolts adjustments and shifter linkage adjustments first. Also check to see if carpet or shifter boot is interfering. I found a nut a little loose that attaches the lever to the shift fork on mine..................................MO
 
Once you've checked all the externals, linkage, loose bolts, etc you will have to look inside. But before you do that there is a little check you need to do to help you find what you're looking for once you're inside.

The transmission experiences 3 load conditions, accel, float and decel. First thing you do is determine under which condition (s) it is coming out of gear.

Accel is just as it says. The significant factor is that the load is on one side of the splines on the shift collar, hub splines and gear splines.

In decel, the load is on the opposite side of the splines.

In float, there is no load on either side. That spot you can find if you feather the throttle at cruise so that it is loaded in neither side.

If it comes out of gear, sometimes violently, under accel load only, you want to look at the splines on the collar, and mating splines on the gears. When they are in good cond the mating surfaces on the spline teeth are parallel to each other. In a worn gearset they can have an angle to them. When they are nice and parallel, under load the force between the collar and the gear splines is so great that it is extremely difficult to pull it out of gear. However, when worn and no longer parallel they create a "ramp" which, under load,creates an end thrust that pushes the collar and gear spline apart. In this condition you would find it very hard to hold it in gear under hard accel load.

Decel is the same, but wear on the other face. Jumps out of gear on decel only.

If it only jumps out of gear in float, look to the detent in the shift cover. There is no spline contact load to hold it in gear so it relies entirely on the detent to hold it in there .

If it's jumping out under varying conditions I would suspect a misalignment between the input and output shafts. May have dropped a roller in the back of the input shaft.

In the pic the red arrow is pointing to the wear on the drive side. Look at the coast side on the teeth above to see how much wear. Significant amount of wear but still serviceable as the tooth is still square. Look at the corresponding teeth on the shift collar.
Steve g
gear.jpg
 
Thanks for the suggestions everyone. The tranny pops out usually during decell. I'll check the linkage bushings to see if they are nylon or brass, and go over the linkage adjustments and stop bolts, etc. once again, but I am leaning towards bellhousing allignment (unfortunately).
 
Sorry I didn't get back to you all sooner...I had problems getting into the FBBO system. This is why I should be playing golf.
 
I have had a problem with my 18 spline a833 popping out of 2nd during "float" or throttle positions near "float".
Started when Jamie Passon did a rebuild and I wanted his slick shift sliders and synchros installed while he was going through it anyway. I checked the bellhousing runout before I reinstalled the trans the 2nd time because wear on new parts indicated misalignment. Even after getting the runout straight, 2nd gear was still popping out around the "float" throttle range. I have the 855 from Passon in now and it's great, no issues. Jamie has my 833 and that is the 3rd time he will be working to resolve the problem.
 
If it only jumps out of gear in float, look to the detent in the shift cover. There is no spline contact load to hold it in gear so it relies entirely on the detent to hold it in there .
Can you elaborate?
Any pictures of the detent?
This describes my problem to a T that I have had w/my 18 spline 833.
I'm running the Passon a855 now, but Jamie is working on the 833 for the 3rd time because of 2nd gear popping out under "float"
 
Can you elaborate?
Any pictures of the detent?
This describes my problem to a T that I have had w/my 18 spline 833.
I'm running the Passon a855 now, but Jamie is working on the 833 for the 3rd time because of 2nd gear popping out under "float"
I expect you have checked the input shaft to pilot bearing clearance to make sure it is not too loose? Long shot, but making sure nothing interferes with shifter or linkage going fully into gear( such as shift stick boot, carpet, or parking brake or speedo cable? Mine kept coming out of low gear when it was " floating". Turned out to be the shift lever on the shift fork was not quite tight enough . You do know those nuts are a flange nut and hold better than a flat washer and locK washer? ........MO
 
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