Lurching into gear
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4th Gear
Joined: Nov 2025
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Lurching into gear
Hey forum, first post here. I have an 89 F150 2WD 4.9L C6 with 198k miles.
When I put it into gear, it lurches terribly (D forward lurch, R rearward lurch). Check out my videos of the driveline from transmission back. It doesn’t look like the transmission is moving so I’m thinking it may be the differential? What do y’all think?
When I put it into gear, it lurches terribly (D forward lurch, R rearward lurch). Check out my videos of the driveline from transmission back. It doesn’t look like the transmission is moving so I’m thinking it may be the differential? What do y’all think?
Thread Starter
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4th Gear
Joined: Nov 2025
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Bumping to hope for more help.
It does go to high idle on cold crank and settles down after it heats up. I don’t know what it settles to though. Is the thought that my engine/transmission mounts are bad?
would appreciate any help thanks!
It does go to high idle on cold crank and settles down after it heats up. I don’t know what it settles to though. Is the thought that my engine/transmission mounts are bad?
would appreciate any help thanks!
Thread Starter
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4th Gear
Joined: Nov 2025
Posts: 4
Likes: 0
thanks for the reply. I think the leafs themselves are okay but I will look into the bushings and all the rubber bits that can go. I’ll see about changing the shocks too, they seem stiff rather than sloppy though.
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