4x4 transmission drop help
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5th Wheeling
Joined: Mar 2021
Posts: 47
Likes: 1
4x4 transmission drop help
Hi All,
I am getting ready to pull the engine out of the 1987 F-150 auto 4x4 to rebuild the heads and replace the flywheel. I have worked on many cars and trucks before but never pulled the engine off of a 4x4 auto transmission . Can I leave the transmission attached to the mount or do I have to free it from the mount? I see the driveshaft going to the front transfer case. Do I have to remove the driveshaft to disengage the motor from the tranny? Do I need to support the tranny other than it being on the tranny crossmember?
Alternatively, do you think it would save time and work to simply remove the heads and transmission rather than taking out the engine to do the work? Has anyone done this?
I am getting great tips form you all for my project. Thanks for your help.
Frank
I am getting ready to pull the engine out of the 1987 F-150 auto 4x4 to rebuild the heads and replace the flywheel. I have worked on many cars and trucks before but never pulled the engine off of a 4x4 auto transmission . Can I leave the transmission attached to the mount or do I have to free it from the mount? I see the driveshaft going to the front transfer case. Do I have to remove the driveshaft to disengage the motor from the tranny? Do I need to support the tranny other than it being on the tranny crossmember?
Alternatively, do you think it would save time and work to simply remove the heads and transmission rather than taking out the engine to do the work? Has anyone done this?
I am getting great tips form you all for my project. Thanks for your help.
Frank
Hotshot
Joined: Jun 2015
Posts: 12,840
Likes: 2,437
There is no need to remove the engine to remove the heads. Were you removing it to replace the pan gasket and/ or rear main seal and then clean/ paint the engine?
You aren’t going to replace the flywheel since only manual transmissions use one of those. Automatic transmissions use a flex plate. Why do you need to replace it?
Two or four wheel drive is not relevant when removing the engine. You would only need to remove the front driveshaft if it is in the way of accessing some of the engine bolts. Yes you need to support the front of the transmission.
You aren’t going to replace the flywheel since only manual transmissions use one of those. Automatic transmissions use a flex plate. Why do you need to replace it?
Two or four wheel drive is not relevant when removing the engine. You would only need to remove the front driveshaft if it is in the way of accessing some of the engine bolts. Yes you need to support the front of the transmission.
Cargo Master
Joined: Nov 2009
Posts: 2,190
Likes: 620
For my part, It's easiest to pull the front clip off the truck, and then swing the engine and transmission out as a unit. But that's just how I do it, it's completely *possible* to do what you want, leaving the short block and transmission in the truck.
Thread Starter
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5th Wheeling
Joined: Mar 2021
Posts: 47
Likes: 1
There is no need to remove the engine to remove the heads. Were you removing it to replace the pan gasket and/ or rear main seal and then clean/ paint the engine?
You aren’t going to replace the flywheel since only manual transmissions use one of those. Automatic transmissions use a flex plate. Why do you need to replace it?
Two or four wheel drive is not relevant when removing the engine. You would only need to remove the front driveshaft if it is in the way of accessing some of the engine bolts. Yes you need to support the front of the transmission.
You aren’t going to replace the flywheel since only manual transmissions use one of those. Automatic transmissions use a flex plate. Why do you need to replace it?
Two or four wheel drive is not relevant when removing the engine. You would only need to remove the front driveshaft if it is in the way of accessing some of the engine bolts. Yes you need to support the front of the transmission.
Hotshot
Joined: Jun 2015
Posts: 12,840
Likes: 2,437
There isn’t anything special about it being 4wd verses 2wd. One more driveshaft to remove and transfer case to unbolt. That’s about it. You’re probably better off pulling the engine and doing the heads on a stand.
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