S.O.S. 833 pops out of 3rd without load.

[hemidup]

Just made my first attempt rebuilding an 833 4 speed. All new parts except for shifter fork. Shifts great, however while cruising around town in 3rd and if you let off the gas, the trans pops into "N". Using offset dowel pins, the Lakewood bellhousing is within .002". Quadrupled check the linkage and everything is fine. Need help.

Need help. Thanks in advance,

Jerry

[Mike Taylor 3601]

Bell housing was going to be first suggestion, may make sure it's fully engaged in gear,also could be thrust issue that pops it out when letting off gas.
mike Taylor 3601

[buzzinhalfdozen]

Not familiar with this particular trans , however I'll assume it has a detent system for the shift rails? If so is it possible for some reason rail is not moving enough for detent to sit in rail groove? That is what basically holds it in gear along with any back cut on the shift sleeve. Take the linkage off and by hand move the shift arm you should be able to feel the detent drop into the shift shaft rail. Joe

[Arnold Greene]

i would check the adjustment on the shifter to insure it is all the way in 3rd, as well as the stops on the shifter.

[FED 387]

Ditto on the stops/alignment of the shifter---also check the bushings on the trans shifter arms might be a cracked one----I think it also could be a shifter fork or a slider might be worn--- is it only third???? Do you have to "hold" it in gear to keep it from popping outa gear???

[hemidup]

Originally Posted by FED 387

Ditto on the stops/alignment of the shifter---also check the bushings on the trans shifter arms might be a cracked one----I think it also could be a shifter fork or a slider might be worn--- is it only third???? Do you have to "hold" it in gear to keep it from popping outa gear???

Yes, it only does it in 3rd and no, I don't have to hold it in gear as long as its under a very slight load. When puttin around town in 3rd and as long as my foot is on the gas its fine. It's only when I let off the gas is when it pops out of gear. I put the transmission in 3rd and pulled the linkage rod off. 3rd gear was fully engaged. I even pulled the shifter stop out and it did the same thing. I'm replacing the side cover and shifter fork since those are the only items that were reused. I'll look into the shifter itself tomorrow.

Thanks

[Jim B]

Before you pull the unit check the 3rd and 4th gear engagement by hand with the side cover off. The slider should feel like it positively clicks into each gear. If 3rd feels different than the other gears you probably are at the root of the problem.Take a look at the 3-4 synchro. Make sure the hub, dog keys and expansion springs are OK and installed properly. Do a quick check on the rollers inside the rear of the input shaft, the front bearing surface of the mainshaft, and the mainshaft endplay and rear bearing. You didn't mention which (18 or 23 spline) trans you have and the 18 spline can be normally pretty noisy and cover up an early bearing problem.

[hemidup]

Originally Posted by Jim B

Before you pull the unit check the 3rd and 4th gear engagement by hand with the side cover off. The slider should feel like it positively clicks into each gear. If 3rd feels different than the other gears you probably are at the root of the problem.Take a look at the 3-4 synchro. Make sure the hub, dog keys and expansion springs are OK and installed properly. Do a quick check on the rollers inside the rear of the input shaft, the front bearing surface of the mainshaft, and the mainshaft endplay and rear bearing. You didn't mention which (18 or 23 spline) trans you have and the 18 spline can be normally pretty noisy and cover up an early bearing problem.

18 spline and this thing is giving me headaches.

Got rid of the Lakewood bellhousing, tried the wider brass vs steel shifter forks with different cover plates, installed a brand new shifter, put the older, thicker syncro's in and gained .015" and still had the same problem. Bearing's are fine.

Found out the new expansion rings we were sent were the wrong ones and caused the dog keys to be cocked. Thought the problem was solved. Wrong!

Also tried a new slider, compliments of Brewer, and still have the same problem.

From our local 833 expert's that have stopped by the shop to verify the trans was assembled correctly, all the way to asking Arlan Vandkee's advise, the dog gone transmission is still kicking out of 3rd.

Every part in this transmission is brand spanking new with the exception of the cover plate (tried 3) and tail shaft.

[njk53]

Had a T-10 that did the same thing (popped out of 3rd) and it turned out to be the syncros.