trans swap

oldfordnut · Post by **oldfordnut** » Tue Nov 22, 2005 11:02 am

well i got myself a 1971 ford f-100 and it has a 4 speed np 435 i belive it may be a t-18 but idk but anywyas it has a 302 in it and i plan on changing the trans to just a 3 speed does anyone kno what all im goin to have to change to make it work??? thnx alot billy

spartman · Post by **spartman** » Tue Nov 22, 2005 11:18 am

You will need a new tranny hump or weld up the hole in the one that you have.

Is this a 3 spd manual or auto?

Either way you will need to cut a new hole either of the floor shifters for the units.

If all goes well with my 4speed setup I would have a Hurst Automatic shifter to sell.

flyboy2610 · Post by **flyboy2610** » Tue Nov 22, 2005 8:29 pm

Why do you want to get rid of the 4spd?

72hiboy4x4 · Post by **72hiboy4x4** » Tue Nov 22, 2005 11:18 pm

I pulled a 3 speed out of a '71 with a 302 and replaced it with a 4 speed and it was all bolt in. took about 3 hrs by myself.
but I would think long and hard about changing to the 3 speed. too many advantages with the 4 speed and the top gears are the same (1:1)
BTW.....I have that 3 speed sitting here in the driveway. been out about 6 years now........

oldfordnut · Post by **oldfordnut** » Sat Nov 26, 2005 12:11 pm

well im maken the truck a hot rod truck and i dont really want the creeper gear or the 2 ft throw

Post by **DuckRyder** » Sat Nov 26, 2005 2:16 pm

Coughtoploadercough

oldfordnut · Post by **oldfordnut** » Sat Nov 26, 2005 7:20 pm

im thinken that ur for the 3 speed too i just cant afford the long throws u kno so anyone have all the things i would need to do let me kno
PLEASE

72hiboy4x4 · Post by **72hiboy4x4** » Sat Nov 26, 2005 8:11 pm

could you translate that for me? please????

Post by **FORDification** » Sat Nov 26, 2005 8:12 pm

I agree with Duckryder....a 4-spd Toploader (car style) would be a good tranny to swap in and fairly easy to do. The hardest part will be finding one that's affordable, since everybody wants one.

The following is a little bit off-topic, but as long as we're on the subject...

I was asking about attaching a Toploader swap behind an FE a while back and was told it'll take a little parts mixing/matching, but for a street-driven truck it'll be worth it. I'd like to do the same thing some day....if I get rich enough to afford one or even lucky enough to find one. Here's some info that Barry gave me on the subject:

The truck bellhousing is 7/16" deeper than the car bellhousing. This means any FE car manual tranny (Toploader included) will have a problem with it's input nose engaging into the pilot shaft. I have heard of a way around this though. Instead of using an FE tranny, use the small block trannies (Toploader included). They all have a longer input nose and it engages perfectly.
Actually, I think the small block Toploader would be a better match for a truck because it's a wide ratio with a lower 1st compared to the big block Toploader. Plus, the truck bellhousing takes the bigger 11 1/2" clutch compared to the 11" car bell.

(Close ratio) - 2.32 1.69 1.29 1.00
(Wide ratio) - 2.78 1.93 1.35 1.00

Bellhousings that will be used with a Toploader must measure 6 1/4" deep. If it measures 6 3/4" deep it is a truck bellhousing and should not be used.

oldfordnut · Post by **oldfordnut** » Mon Nov 28, 2005 8:23 pm

ok im sorry but i really need help if i go to put the 3 speed in that all am i goin to have to change willl the clutch assembly be fine what mounts will i need will i need to cahnge drive shafts i have the np435 and i do not want the long throws so im gonna go to the good old ford 3 speed PLEASE!!

spartman · Post by **spartman** » Mon Nov 28, 2005 9:55 pm

try this site for your toploader:

car-part.com

This site is linked to a lot of the junkyards across the country.

The FORDification.com Forums

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