T90 - Gears Not Right - The CJ2A Page Forums

I put in a rebuilt transmission. (Long Story). Anyway, those who were following my transfer case woes, I got the thing back in today!

This may have been the problem all along. :/ But, I'm glad I pulled the transfer case. I got it all sealed up properly, etc.

The gear that connects the main shaft from the transmission to the transfer case is out. So, there is no power to anything other than the transmission.

If I put the transmission in 3rd gear. The engine turns over.

If I put the transmission in 1st or reverse the engine will not turn over. Its locked up tighter than a tick on a dog.

Put it back in 3rd again, the engine turns over.

I'm hoping the forks are in wrong or something simple. Any tips would be appreciated! It's been six years of restoration. i'm ready to drive this thing again.

Thanks!

~P.

Peer Plaut
Jeep CJ-2A L4-134 Engine Coffee Mug

Happened to me. When i put the shift tower on i must have pushed the first and reverse gear over so it engaged the reverse idler gear.(so it was stuck in two gears.

DMusil

pplaut wrote:

DMusil- yes, I think I am stuck in two gears. Do I need to align the gears in a certain way before installing the sh*t tower? Do I need to make sure the shift tower is in neutral? Any guidance appreciated.

Thanks!

~P.

Make sure the shift tower is in neutral. Make sure the 2&3 shift collar isn't engaging either the input gear or the 2nd gear. Center the 1st and reverse mainshaft gear so that it doesn't engage either the countershaft 1st gear or the reverse idler. Carefully install the shift tower on the transmission without displacing the mainshaft 1st and reverse gear. You will need to insure that the 1st & reverse shift fork goes into the collar on the 1st and reverse mainshaft gear.

Of course, a gasket and sealer need to go in between the transmission case and the shift tower housing.

46 CJ-2A #64462 "Ol' Red" (bought April 1969)(second owner)(12 V, 11" brakes, M-38 frame, MD Juan tub)

U.S. Coast Guard Chief Petty Officer(ret.)
U.S. Army Vietnam veteran and damned proud of it.

When you talk or see him again thank him for his service from a really old Coast Guardsman.

46 CJ-2A #64462 "Ol' Red" (bought April 1969)(second owner)(12 V, 11" brakes, M-38 frame, MD Juan tub)

U.S. Coast Guard Chief Petty Officer(ret.)
U.S. Army Vietnam veteran and damned proud of it.

It is possible to have the 1st&Reverse gear installed on the mainshaft backwards. It is also possible for the 2nd&3rd shift collar to be installed backwards.

I hope this isn't the case.

It would be nice to see a picture of the inside of the transmission from the top view.

Does the reverse idler spin freely?

With the shift tower off and the gears selected to neutral does the rear output shaft turn freely?

46 CJ-2A #64462 "Ol' Red" (bought April 1969)(second owner)(12 V, 11" brakes, M-38 frame, MD Juan tub)

U.S. Coast Guard Chief Petty Officer(ret.)
U.S. Army Vietnam veteran and damned proud of it.

My Transmission Woes

http://drive.google.com/drive/folders/1BudwQCrTCCVhgGApR78x28Q5MdyJvZb0?usp=sharing

I took several photos.

I could not get them to post correctly but the link should work.

Thanks for any help!

~P.

Peer Plaut
Jeep CJ-2A L4-134 Engine Coffee Mug

DMusil wrote:

Synchro assy.(for first and second0 is put in wrong. Big end should be foward.

Don't you mean 2nd and 3rd?

Long end of syncro collar should go forward.

46 CJ-2A #64462 "Ol' Red" (bought April 1969)(second owner)(12 V, 11" brakes, M-38 frame, MD Juan tub)

U.S. Coast Guard Chief Petty Officer(ret.)
U.S. Army Vietnam veteran and damned proud of it.

yes second and third

DMusil

If I remember correctly, the inner portion of the hub assembly can be installed either way. The synchro rings are both the same. The three little dogs and inner springs are also the same. So, you really only need to remove the output shaft assembly, reverse the outer hub assembly, then re-install the output shaft assembly.

This can be done without pulling the transmission, but you'll need to pull the TC. Because your tub is in place, it can be helpful to have a helper. One guy underneath and one above in the tub.

Edit: Upon further reflection, there is one more thing that is a little tricky. The three little synchro dogs will pop out of position once you slide the outer hub off. If you are mindful at this stage, you can hold them all in place while sliding the outer hub off...reverse it...then back on while holding them in place.

Edit: One more thing. When you slide the output shaft (main shaft) out, there will be a number of roller bearings that will fall to the bottom of the case. If I haven't bored you so far, I can give you a couple tricks to avoid this.

Edited by athawk11 - 02 June 2020 at 11:14pm

1- 1946 CJ2A
2- 1949 CJ3A