FE overdrive options
FTE Legend
Joined: Nov 2015
Posts: 30,906
Likes: 4,122
From: Angier, NC
Interesting thread. I have an F100 4WD with a married TC, and an NP435. I make about 550 ft/lbs, so the Ranger is not rated for me, but in any case it seems like you are adding at least 8 inches between the bell housing and the NP435. How would that work given the really long throw on the stick shift?
I also looked at the Tremec option and aside from it's lowish torque rating, it still seems to have wide splits. First gear is 6.16 to one. Not really suitable for daily driving, I don't plan on doing any rock crawling.
I also looked at the Tremec option and aside from it's lowish torque rating, it still seems to have wide splits. First gear is 6.16 to one. Not really suitable for daily driving, I don't plan on doing any rock crawling.
"The unit is built to handle 420 ft./lbs. of torque and has a G.V.W. rating of 25,000 lbs." I would think if you are not towing a total of 25,000 lbs with that 550 hp you would be ok.
On the stick I will be able to answer that in a few weeks when I get mine and install it.
What I did find out a few weeks ago in FTE was the larger trucks, above the F350's, had the bench seat center cut back a few inches to clear the stick.
I like that and may look into this if the stick hits the seat if I don't heat and re-bend the stick first or may do a little of both?
FYI I have a 300 six in front of a T18 but will be swapping in the NP435 when I do the gear splitter and the truck will be used as a back up to pull my open deck 21 ft car trailer.
Dave ----
Laughing Gas
Joined: May 2007
Posts: 960
Likes: 10
From: Victoria (North Saanich)
Is the 550hp from a dyno, motor or wheel out put, or a guess on all the added parts?
"The unit is built to handle 420 ft./lbs. of torque and has a G.V.W. rating of 25,000 lbs." I would think if you are not towing a total of 25,000 lbs with that 550 hp you would be ok.
On the stick I will be able to answer that in a few weeks when I get mine and install it.
What I did find out a few weeks ago in FTE was the larger trucks, above the F350's, had the bench seat center cut back a few inches to clear the stick.
I like that and may look into this if the stick hits the seat if I don't heat and re-bend the stick first or may do a little of both?
FYI I have a 300 six in front of a T18 but will be swapping in the NP435 when I do the gear splitter and the truck will be used as a back up to pull my open deck 21 ft car trailer.
Dave ----
"The unit is built to handle 420 ft./lbs. of torque and has a G.V.W. rating of 25,000 lbs." I would think if you are not towing a total of 25,000 lbs with that 550 hp you would be ok.
On the stick I will be able to answer that in a few weeks when I get mine and install it.
What I did find out a few weeks ago in FTE was the larger trucks, above the F350's, had the bench seat center cut back a few inches to clear the stick.
I like that and may look into this if the stick hits the seat if I don't heat and re-bend the stick first or may do a little of both?
FYI I have a 300 six in front of a T18 but will be swapping in the NP435 when I do the gear splitter and the truck will be used as a back up to pull my open deck 21 ft car trailer.
Dave ----
The gear splits on the NP435 make it a wide ratio 3 speed. I have been thinking about a T19 with a 4.5 to 1 first gear (late 80's Ford diesels used them) to get four useful gears plus syncro on first, the T19 and T18 are externally identical. The only issue is I'd need a new t-case because the NP435 and Dana 21 are married, so it is a bit more of a project than adding overdrive.
I'm waiting on some parts to switch over to front discs, should have been here already. It gets going really fast, I think my next priority is to slow it down.
FTE Legend
Joined: Nov 2015
Posts: 30,906
Likes: 4,122
From: Angier, NC
It is 550 ft/lbs at the crank based on the build, I've never dyno'd it. It is a standard build from Barry Rabotnick with BBM heads and it is pretty much a crate engine. I did dyno my 410 and it made 325 ft/lbs at the rear wheels, and this thing is far stronger. It will snap the wheels loose at 25 mph in second gear by giving it 3/4 throttle. I would be concerned about going that much over their recommended torque value, especially since I do like to slam it.
The gear splits on the NP435 make it a wide ratio 3 speed. I have been thinking about a T19 with a 4.5 to 1 first gear (late 80's Ford diesels used them) to get four useful gears plus syncro on first, the T19 and T18 are externally identical. The only issue is I'd need a new t-case because the NP435 and Dana 21 are married, so it is a bit more of a project than adding overdrive.
I'm waiting on some parts to switch over to front discs, should have been here already. It gets going really fast, I think my next priority is to slow it down.
The gear splits on the NP435 make it a wide ratio 3 speed. I have been thinking about a T19 with a 4.5 to 1 first gear (late 80's Ford diesels used them) to get four useful gears plus syncro on first, the T19 and T18 are externally identical. The only issue is I'd need a new t-case because the NP435 and Dana 21 are married, so it is a bit more of a project than adding overdrive.
I'm waiting on some parts to switch over to front discs, should have been here already. It gets going really fast, I think my next priority is to slow it down.
So if you find a transmission that can handle 550 hp can the transfer case do the same?
Any way a transmission & transfer from a F450 or F550 could 1) bolt to your motor, 2) handle the 550 hp?
Dave ----
Cargo Master
Joined: Feb 2006
Posts: 3,009
Likes: 250
From: North Pole, Alaska
In a word, NO! A F-450/550 uses a mod motor V-10, or a 6.0/6.4/6.7, and a ZF-6 (integral belll housing), or a 4R100, 5R110, or 6R140. I don't think anyone makes a diesel adapter, and there is Bendtsen's for a mod motor pattern trans adapter. He could probably use a NVG 5600 behind a Ram TC. The Ram G56 is a Mercedes-Benz 6 speed integral bell housing trans.
Laughing Gas
Joined: May 2007
Posts: 960
Likes: 10
From: Victoria (North Saanich)
Ford used T19s behind 460s and diesels in the mid 80's. That was a 6.9 liter IDI engine, normally aspirated making 315 ft/lbs. In the 4WD diesel and 2WD 460 it came with a 4.02 first gear, or a 5.11 in the 2WD diesel and a 6.32 in the 4WD 460. I think it came with a BW 1356 t-case, but those were chain drives and certainly wouldn't like big torque. Having said that, in 2WD the torque is directly transmitted to the rear drive shaft, and in 4WD I'm not likely to try and spin all four tires (tempting though it sounds), so handling 550 ft/lbs is probably not a real concern.
If I could find a mid 80's 4WD diesel and salvage the tranny and t-case, I could possibly make them work. Not sure if I'd need a new input shaft to fit the FE, but I know that Novak do it, so the part is available.
Having said that, Novak do make an adapter for a Dana 20 to the T19, and you can get separate front and rear drive engagement, so it possible to have a front wheel drive F100. Think I could surprise some Hondas at traffic lights with a front wheel drive burn out?
Anyway, my budget for this year is blown on disc brakes (assuming they ever show up) and I think next is an Eaton Truetrac for the 9 inch is next up.
If I could find a mid 80's 4WD diesel and salvage the tranny and t-case, I could possibly make them work. Not sure if I'd need a new input shaft to fit the FE, but I know that Novak do it, so the part is available.
Having said that, Novak do make an adapter for a Dana 20 to the T19, and you can get separate front and rear drive engagement, so it possible to have a front wheel drive F100. Think I could surprise some Hondas at traffic lights with a front wheel drive burn out?
Anyway, my budget for this year is blown on disc brakes (assuming they ever show up) and I think next is an Eaton Truetrac for the 9 inch is next up.
Cargo Master
Joined: Feb 2006
Posts: 3,009
Likes: 250
From: North Pole, Alaska
I always thought the Dana 20 was a lighter duty TC than the NP 205. I guess it isn't so since Advance Adapters makes an adapter to mate it with a 6R140 trans (1033 lbs ft) which means diesel based. It looks like Novak doesn't do an adapter for a Bronco D20.
James Duff does have an adapter for a T-18/19 with a 28 spline output shaft:
https://dufftuff.com/product/adapter...ed-to-dana-20/
James Duff does have an adapter for a T-18/19 with a 28 spline output shaft:
https://dufftuff.com/product/adapter...ed-to-dana-20/
Laughing Gas
Joined: Jul 1999
Posts: 1,047
Likes: 22
From: Lacey, WA
Junior User
Joined: May 2020
Posts: 86
Likes: 1
From: Montgomery, AL
One thing I would add is you don't really make 550 ft/lbs of torque if the wheels spin well before you have it maxed out. It makes whatever torque is needed to bust the tires loose, then torque rises no more. Yes, you could make max torque in a high gear, but that torque isn't multiplied as much by the higher gear, so anything after the transmission still sees less torque.
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