I am in the process of swapping a 429 into my 78 f150 4wd. It is replacing a 351 m. I have never liked a modified and am finally able to get rid of it....or so I thought. My problem is, the snout on the torque converter is hitting the crank. It is a c6 auto tranny. I tried the 351M torque converter and one for a 460/429. Help!! What is the problem? I removed the pilot bushing from it. Any info is greatly appreciated! Thank you!

 

Are you sure you got all the pilot bushing out, did it have a needle bearing pressed into a brass piece? if so, the outside part needs to come out also.

 

Be absolutely SURE the torque converter is fully seated in the transmission!! You should feel three "clicks" when sliding the converter onto the shaft.
It has to seat first on the input shaft, then on the stator support then lastly on the oil pump drive.
If it's not fully seated, the torque converter will bind against the flex plate when you try to mate the transmission to the block. If you keep going and try to start the engine, you stand a very good chance of trashing the front pump.
If you don't feel all three clicks, keep spinning the converter and pushing in until you do.

 

You don't have the torque converter seated all the way in. You are going to destroy the pump if you try and force it. You need to spin and lift and wiggle that sucker till it's seated all the way in. Hopefully you haven't damaged the pump yet.

 

The torque converter is seated properly..all three clicks. All Dow pins were lined up....The flywheel side of the torque converter won't slide into the crank. We just found out that the motor was pulled from an f700. Would that make a difference? Thanks.

 

It might, I am not aware of anything that would kill the project from that side, but if it doesn't have a 1.375 crank pilot, then it probably won't fit right.

 

You bought a supposed 429 and you just found it's from a BIG truck? I would assume that by looking at the rams horn exhaust manifolds, engine mounts, you should have known it's not from a car.

The 429 (and 370) introduced in 1979 600 and larger series trucks is not the same as the 429 used in 1968/73 Ford/Merc Passenger Cars & 1968/71 Thunderbird.

What is the C6 tranny from?

These truck 370's & 429's did not use a C6, were only available (optional) with TransMatic (Allison) A/T.

The truck 370/429 flexplate, flywheel and harmonic balancer are also different than the 429 car engine as are other parts as well.

C4TZ-7600-C .. Pilot Bearing / 2 1/8" O.D. x 1" I.D. x 19/32" wide: 1964/78 FT engines & 1979/96 429 engine.

 

It is a 429 motor. We looked at the numbers on the block...d9te something. I can't remember right off. The c6 tranny was in our 78 F150 previously with the 351 M. The motor came with a clutch pack etc from a bulldog transmission.

 

Measure the snout of the convertor, there are at least 2 sizes (1.375 and 1.850). Try to seat the convertor on the flexplate without the transmission, the problem will be visible then. You may need a different convertor
Don

 

You cannot go by block casting numbers to ID engine sizes in most cases.

Block casting number: D9TE-6015-AB

460: 1979 F150/350 - 1979/97 E250/350 - 1982/97 F250/350 (460 only available in 1980/82 Econolines).

I do not know if this block casting number was used on 1979/96 370 & 429 engines.

1979: The part number for the 370 bare block is different from the 429 bare block, different from the 460 bare block.

Did this "429" come with intake and exhaust manifolds, rubber engine mounts? Is there a weighted crank spacer?

 

I appreciate all the info and responses. The motor didn't have the motor mounts etc on it. We bought an aluminum intake for it just recently along with a lot of other parts. I'm assuming it has an industrial style crank which won't ever work. So bye bye to the 429 and hello to a 460. Thanks again for the info.

 

I spoke with a gentlemen who builds torque converters, and thankfully he pointed me in the right direction. They make a torque converter specifically for this application. C6 tranny to a industrial style crank of a 429. The part number is f23-8. Please pass this information on if anyone else has a similar problem. So relieved to have found this out. Thanks again for all your help!