i have a 86 4x4 4.9l 4sp, lifted 6 inch w/33inch tires. have noticed a bad getting worse trans shakeing like its loose even worse when in 4x4 and trying to clime a grade almost like the rear end is loose but all of the noise is comeing thru the shifter and shakeing bad, i have replaced all u joints, and new fluid in axels . could this be motor mounts and trans mounts? also it wont stay in third gear, it pops out when accellerateing, but if i hold it in it will stay in? any ideas?
thanks guys-gals

 

clutch maybe

 

is it really bad when your first letting out the clutch when the truck stopped? that would be a pretty good indication that the clutch is toast.

 

yes the clutch has started to chatter at take off, i just replaced the slave 2 weeks ago. that is one issue but it is not slipping at all it still hooks up after i get out of 2nd, but i have started to notice that chattering at take off. from stoped start off in 2nd its chattering some. so you think clutch, and mounts might be in order????? i did not even think about the clutch becuse it shows no sign of slipping??

 

Check all mounts,and the bellhousing bolts. The splines on third gear are worn,letting it jump out. I've known people who drove for years with the transmission jumping out of gear. On one that jumped out of fourth,the guy cut a piece of wood just long enough to jamb between the dash and the gear shift with it in fourth.

 

thanks old rusty, lol about the wood, had my 5yr old with me today and had him push on shifter with his feet to keep it in gear. thanks on the bellhouseing bolts will reserch this in the am. what can i do about the splines? is that a trans rebuild? if so i have a great u pull it place that has about 15 classic f 150's sitting there, any way thanks for the advice.

 

About the only cure for third gear is to replace it. As for rebuilding the transmission,it would prolly cost about as much in parts as it would to buy one from the salvage. If you get one from the salvage there a lot less down time also.

 

day number 8.

ok now need clutch for shure makeing sqealing noise when i disengage to shift. sounds like the flywheel is rubbing??so with these problems i started looking around found some things local. but have questions.
remember my truck is a 86 4x4 w/4.9l carb.
what clutch 10" or 11"
found a transmission and transfercase altogether from a 94 f150 4x4 4.9l fuel injected the trans is a 5sp. my ? is will this bolt up and work and what clutch do i get?? any help thanks..