Transmission / Overdrive: popping out second gear

[hawk gt 62 rhd]

Hi to all,encountered last week this problem.Tranny T86 /od
There must be a service letter U 1962-2,is that about this item?thanks
Dick Waterreus

[Skip Lackie]

Dick-
The letter prefix system for service letters didn't start until the 1963 models, so there is no number U-1962-2. However, number S-1035 of 21 November 1961 is entitled "Shift linkage and linkage adjustment 1962 passenger cars equipped with standard and overdrive transmission." Is that what you're looking for?

[2moredoors]

Does this service bulletin come up with a solution. If so how does one obtain a copy?

[Skip Lackie]

Yes. It includes several pages of adjustment procedures and lists the part numbers for new shift tubes installed beginning with car serial numbers 62S-14689 and 62V-10406. A compendium of service letters on CD is available (can't remember at the moment from whom)
-- the ads have appeared in TW. I don't have a spare copy of this SL, but would be glad to make a copy and mail it to you. I don't have an operating scanner at the moment. I know Dwain G has a complete copy of SLs and posted some in the past -- maybe he will respond.

[2moredoors]

Thanks. I'll wait to see if Dwain G replies. If not I will PM you with my info. Thanks

cliff t

[Bob Andrews]

Sure sounds like synchros to me. The T-96 in my Lark likes to pop out of high gear. Mine is accompanied by a whine as well. The O/D isn't working either.

In my case, I'm looking for a good used replacement. Should be plenty. A T-86 might be a little harder to find.

[Skybolt]

I have had problems like this and it turned out to be a broken retaining c-clip that holds the rear main bearing in place so under load the whole assembly would move backwards and because of torque load also sideways wearing the syncros quicker than normal. The trans worked fine but would jump out of second and was a little syncro slow until it warmed up. I had to junk the trans because the syncros were bad, the front roller main shaft bearings were worn and also the contact surfaces. This was a transmission that had less than 29k miles. Hopefully yours is just a worn syncro problem.

[hawk gt 62 rhd]

popping out second gear

My idea is to open the tranny and take measurements of the little lock pin with spring and two steel balls between the two gear forks ,is it common that the spring will loose its power after 40/50years?
Dick Waterreus

[wdills]

I had a similar problem on my T86. Unfortunately, adjustment didn't help. When I removed the top cover, I found several damaged gears, including the main cluster. Hope your luck is better than mine. The god news is, you can get a pretty good look at your gears from the top cover.

Mine would jump out of first and second. My unprofessional failure analysis lead me to believe that the problem started with someone either downshifting into first or shifting from reverse into first when the car was still rolling. Since first is not synchronized the damage began. At some point a tooth broke and I think the debris is what got into second and damaged the synchronizers.

[JohnM15]

My number one improvement was to epoxy (JB weld) a magnet on the inside of the oil drain plug on the tranny, rear end, and engine with the intention that any debris would be attracted to the magnet and stay there...

[gordr]

If the problem just began, it's not likely the linkage issue referred to in the service letter. Remember, those service letters were written to address problems that cropped up when the cars were fairly new. I have lots of transmissions that would pop out of second gear. Usually the problem is wear on the blocker rings. Those are the small teeth on the gear itself that mesh with the internal teeth on the sliding sleeve after the synchro has done its part. The teeth on the blocker rings get worn short, but the sides also wear, so that instead of being parallel, they become slightly wedge-shaped, which develops a force that tends to pop the sliding sleeve off the gear.

Solution is to rebuild the transmission, using a new second gear, and a new sliding sleeve, because both halves of the pair suffer wear.

[hawk gt 62 rhd]

popping out second gear

Thanks all for your effort to help me out.
specially to Gordr.
I understand things better now and I think that it will come to a combined solution.
The sleeve the synchro rings and the bearing. There was already a new cluster gear because the other had two broken teeth on low.