Transmission Linkage Problems
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Freshman User
Joined: May 2005
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Transmission Linkage Problems
Hello,
I just bought my first old truck, a 1969 F-100. It originally had a 240 I-6 with a 3 speed on the tree. Someone has apparently switched it over to a 302 with an automatic tranny.
The problem is that it is very difficult/impossible to use the shift lever on the steering column in the cab to change gears--the lever just slides up and down without actually engaging anything. The only way I can shift is by getting under the hood and tugging on the transmission linkage rod by hand. The linkage rod is just a perfectly straight adjustable rod from an arm on the steering column down to the transmission. It seems like the rod would work better if it had a better angle on the tranny...
Is it possible that the person who did the switch just left the original rod in there from the manual transmission? Did the manual and automatic trannys use different linkages? What is the automatic linkage supposed to look like?
Also, the truck won't start unless it is in neutral or park...I assume this is a safety feature. Is there a neutral safety switch on this truck, and if so, where is it located?
I restored a 1968 Mustang a few years back and used this great book that had exploded diagrams for every system on old Mustangs. Does anyone know of a book like that for these trucks?
Thank you for your help.
Chris
I just bought my first old truck, a 1969 F-100. It originally had a 240 I-6 with a 3 speed on the tree. Someone has apparently switched it over to a 302 with an automatic tranny.
The problem is that it is very difficult/impossible to use the shift lever on the steering column in the cab to change gears--the lever just slides up and down without actually engaging anything. The only way I can shift is by getting under the hood and tugging on the transmission linkage rod by hand. The linkage rod is just a perfectly straight adjustable rod from an arm on the steering column down to the transmission. It seems like the rod would work better if it had a better angle on the tranny...
Is it possible that the person who did the switch just left the original rod in there from the manual transmission? Did the manual and automatic trannys use different linkages? What is the automatic linkage supposed to look like?
Also, the truck won't start unless it is in neutral or park...I assume this is a safety feature. Is there a neutral safety switch on this truck, and if so, where is it located?
I restored a 1968 Mustang a few years back and used this great book that had exploded diagrams for every system on old Mustangs. Does anyone know of a book like that for these trucks?
Thank you for your help.
Chris
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
Hello Chris, Welcome to FTE 
The best truck show on the net.
Not being able to see your truck makes it a little more difficult, but something is not tight or hooked up correctly. The column would have had to have been changed to go to auto. As far as I know, all of the C4s & C6s use the same shift linkage so look under the hood of any truck up to 79 with auto and see if they match yours. Does sound like you may have a bad cobble job.
The truck is only supposed to start in P or N, tis a safety concern. When it cranks it's gonna stay put till you are ready to shift gears and start moving.
hopes this helps a little
John
The best truck show on the net.Not being able to see your truck makes it a little more difficult, but something is not tight or hooked up correctly. The column would have had to have been changed to go to auto. As far as I know, all of the C4s & C6s use the same shift linkage so look under the hood of any truck up to 79 with auto and see if they match yours. Does sound like you may have a bad cobble job.
The truck is only supposed to start in P or N, tis a safety concern. When it cranks it's gonna stay put till you are ready to shift gears and start moving.
hopes this helps a little
John
