1964 F100 trans jumping out of 1st.

The Bird · Post by **The Bird** » March 5, 2011, 7:39 pm

We have a 1964 F100 and the transmission started jumping out of 1st. We have re-adjusted the linkage and the clutch is good if that matters.

We thought we had the problem solved and then the truck started to get stuck in forward and reverse gear. So we adjusted the linkage again.

Now it is jumping out of 1st again and won’t go in any other gear except reverse.

We are in the Phoenix, Scottsdale Arizona area and any help would be appreciated.

Thanks

ICEMAN6166 · Post by **ICEMAN6166** » March 5, 2011, 7:55 pm

movement in the cab due to bad mount or floor rust issues will cause this as it will not stay in adjustment.

there are other wear points , rubber/nylon worn in linkage bushing on column, column shift collar (what the shift lever goes into.)

an inspection/ rebuild of all of the areas including the cab mount is needed. once all of the pieces are tight then a proper adjustment can be made.

64 f100 · Post by **64 f100** » March 5, 2011, 10:45 pm

Ditto what Ice said. Bad cab mounts whetther from broken or just worn rubber mounts or rust causing metal fatigue are primary causes of clutch and shifter problems. What happens when the cab sags is it puts pressure on the steering column which in turn causes havoc with shifter linkage, both inside the column and the linkage istself. There are wear points on the linkage both clutch and shifter rod. You also have problems with the nylon bushings and bronz bushings and balls the bronz bushings ride on. If your transmission has been run with it jumping out of gear long enough, you may need another transmission or to rebuild yours. Another issue you sometimes see connected in this regard is the pilot bushing in the crankshaft, although this general has more to do with second and third gear. If the pilot bushing is worn out, it lets the input shaft flop around on the input bearing. This in turn causes a lot of transmission wear. On the tailshaft you have another bearing and bushing, which can also wear out. You will get a lot of vibration when this happens on a shortbed truck. Longbeds have a carrier bearing midshaft of the driveshaft which helps lesson this problem. I like Ice think you need to check for body paly in the cab mounts first, either rust breakdown or rubber breakdown. Just because the rubber is still there doesn't mean it is still functioning right. If the rubber on the bottom of the bolt is loose you have a problem. It may be resting on the top rubber and not being held in placeso the body does not shifft around. Continued driving with this condition can cause all kinds of problems, and excess noise.

Rich

The Bird · Post by **The Bird** » March 6, 2011, 8:07 pm

Thanks for the ideas. We checked the mounts and replaced some linkage parts today. Reverse still works good. Pops out of 1st and we cant get 2nd or 3rd.

We are going to seek professional help. Do you know anyone in Arizona that can help?

Thanks

The Bird · Post by **The Bird** » March 12, 2011, 7:40 pm

After I replaced linkage parts and motor mounts I started thinking, (what else would cause this problem?). So I decided to look at the shifter and where it was connected inside the steering column. What I found is that the shifting tube was broken/wore out where tube and the shifting lever meet. So I put my metal fabrication skills to use and rebuilt the connection.
Everything seems to be working fine now.

Hookedtrout · Post by **Hookedtrout** » March 12, 2011, 8:53 pm

The Bird wrote:After I replaced linkage parts and motor mounts I started thinking, (what else would cause this problem?). So I decided to look at the shifter and where it was connected inside the steering column. What I found is that the shifting tube was broken/wore out where tube and the shifting lever meet. So I put my metal fabrication skills to use and rebuilt the connection.
Everything seems to be working fine now.

Good to hear you got it figured out, makes sleep a little easier at night...at least for me, can't sleep when I've got an issue that I can't figure out.