JLEE05

Have a slightly mod 302, that will mainly be used for towing.has 3.55 gears, 2wd. having a hell of a time trying to get an AOD working properly. curious on what every ones thoughts would be on maybe a swap to a c6 or c4...or maybe even a manual trans(not sure where to start there tho). would tow about 6k on the weekends, and daily drivers during the week.


tia!


jonathan lee

Chris_1

iTrader: (1)

What year ?
If you're going to the trouble of a 3 speed swap, you want the C6. It's the bulletproof workhorse.

redneckfordf2502002

C6 or ZF5 are the only transmission I would personally run.
I personally have a C6 302 (soon to be finished with a cam upgrade) and I love my C6.


Only thing I don't like about the C6 is no OD. If you can live with the gas mileage of the C6 then you should be fine.


Only thing I don't like about the ZF5 is it isn't really a go fast transmission but it doesn't sound like you want that anyways.
Trav

ToddT 58

I've been researching the 5-speeds for two different projects. I understand there are different models: for diesel engines and for gasoline engines.

I have a Perkins diesel engine that was in a late '70s Ford F100 4x4. The guy gave me the engine complete with bell housing for connecting it to a big block transmission. I'm assuming one out of a gas-burner. I'd like to get a ZF5 to hook up to the Perkins. Any suggestions for what to look for?

I'm thinking I'd have trouble going back to anything withOUT overdrive.

As for the AOD, I have one in a parts truck ('92 F-150 with 4.9). Can they not be built up enough for heavier duty service? I have an E-350 with a 6.9 diesel and a C-6. Would love overdrive for that one, too! Options?

redneckfordf2502002

The ZF5 has a integrated bell housing so not sure how you are going to put a bell housing on the ZF5.


Yes the AODs can be built up to be heavier duty.


Only way to get overdrive in a C6 is a gear vendors expensive but works.
Trav

ToddT 58

I noticed that about the integrated bell housing. Same for the Mazda 5-speed, right? Next question... how to connect one to that Perkins?

redneckfordf2502002

I am pretty sure the mazdas do detach but not sure. The one I sold from a ranger was detachable.


Not sure how to hook it up to a perkins.


However the mazdas will probably blow up behind a perkins hence why they didn't put them behind 351s.
Trav

TankforGod3

if your looking for a manual, the np-435 is a bulletproof machine. my truck came with a towing package and that 4 speed it works great for towing but its not very good on gas. They use to use them in bread trucks and heavy machines like that, and they are tough, I had a friend that built a 500hp 351w and used the np-435 and that transmission has held up for 4 years of hard abuse and is still in use today. He has another truck with a 302 and it has the same transmission and he hauls big boats with it.