68 f100

[m.park]

hello my name is mitch i have a 68 f100 custom cab i bought not too long ago and have been rebuilding it little bit at a time. i have currently run into an issue i can not figure out, the other day i made a run to the dump and when i got back my oil sending unit blew and started leaking like mad, i replaced it and changed the oil at the same time. shortly after that i went to test drive it, went to the store to pick some stuff up, and when i came out to go home it took everything it had in it to get it moving so i limped it home. since then i have flushed the transmission and checked my e-brake and my brakes, and i cant figure out what else it could be was wondering if anyone has had the same problem and knows the solution

 

[m78]

More info , type of engine/trans.? Engine missing or powerless.? transmission slipping and engine running fine ?

 

[m.park]

sorry forgot that it has the 360 that has been bored out to the 390 engine and the 4 speed manual transmission when the clutch is in the engine feels like it has just as much power as ever it doesnt feel like it is slipping when im trying to go just feels like im pulling a crap ton of weight

 

[Spd68ford]

have you replaced the fuel pump. I had the same issue with my 360 a while back and it ended up being the fuel pump. they are pretty cheap

 

[Fellro]

360 and 390 are the same bore, the stroke is the change. If there is lack of fuel supply, it will definitely be doggy.

 

[m.park]

its got plenty of fuel supply the fuel pump was replaced just before i bought it

 

[Fellro]

How about fuel filter? How much oil did you lose?

 

[m.park]

not much oil its still full and pressure is back up to about mid gauge again. he said it was a new fuel filter fuel pump and hosing the engine runs fine by itself (with clutch pressed in) when i let off the clutch to move is when the problem arises...

 

[elgemcdlf]

Take the driveshaft out and see if it remains the same when the clutch is released. This will isolate to the trans or rear.

 

[mt.goat]

won't go

sounds like the clutch got oil sprayed back on it when you went to the store. take some brake cleaner and spray it.