I have a 78 F150 4x4 with a 400M (with Aussie Cleveland 2 barrel closed chamber heads) and a New Process 435 tranny. Ford in 78 or 79 also offered Clark 5 speed trannies. I would like to swap out my New Process 435 for a Clark 5 speed. What is involved for this swap? Are Clark 5 speeds easily found?

jnorris

 

[updated:LAST EDITED ON 14-Mar-02 AT 02:22 PM (EST)]Why did you repost this 15 minutes after the first post ?

Please don't do that.

One of them will be removed soon.


Dennis https://www.ford-trucks.com/user_gallery/sizeimage.php?&photoid=1733&.jpg
[i][font color=red]Calgary,Alberta,Canada[/font][i]





[font color=blue]Please Don't Ask Me Any Tough Questions,
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78 F-150 429CJ,Silver, Explorer Pkg.
641/2-Mustang 260,Pre-World's Fair Car.
64-Fairlane500 S/C waiting for a 390-4spd.
68-Mustang 289-Sunlit Gold 80,892Mi
78-Buick LeSabre 403 4V
84 Volvo DL Wagon

 

I apologize for posting that twice. Just looked and didn't see it there, have both been deleted?

 

norris , to err is human , posting twicely isn't very nicely even if they won't answer oncely---just hit the delete key and you will cease to exist---for 24 hours!!!!! :-X11

 

clark 5 speed that is a new one on me the olny thing i can think of is in a 2 ton or better like a ford 600 or somthing and if it is what i am thing of you would have to have a divorced t-case to make it work
and even then i dont know the bell bolt pattern
michael l

 

Jnorris, the Clarks are easily found, and, IMO, are nicer than the NV4500s. There is also supposed to be a NP542 out there somewhere, but I have yet to see one. You might consider a ZF five or six speed for your truck. They came behind 460s, so they will bolt right onto your block, and some came in 4x4s, so you should be able to find one to fit your T-casse as well. DF

 

what else will a ZF bolt up to? thanks for the help

 

re-zf ---any zf-5 speed that will bolt to a 460 will also bolt up to a 351m\400 since they share the same bolt pattern----And my question for Mr.Dinosaurfan , How can you tell the difference between a clark 5 speed whose 5th gear is a 1 to 1 ratio(no overdrive) and a clark 5 speed whose 5th gear is around .78 to 1---and what would be a good price for one of these tranny's!!!!!!!?????????? thanks, fd :-X11 :-X11

 

FD, Clark has been bought out by Eaton. Somewhere around the house I have a 1-800 # for them. There is a tag on the tranny that has #s like 285VHD, which means 7.25 1st and 1 to 1 fifth. If I am remembering rightly, the overdrive model is 285VO. I searched mightily but never found an overdrive. I paid 250$ for the trans and shifter, clutch, flywheel and pressure plate and bell housing with throw out fork. My stufff came from a 1976 F 6 or 700. My thought is to use the clark and change my axles from 4.56 to 3.50. With the 6.99 1st gear my box has, I think I'll still have plenty of pulling power. Should drop my RPM @ freeway speed from 3400 to 2600. Whats not to like ? DF

 

DF , thanks for the response------I'm going to start "looking" for either one of those clark tranny's-----don't thiMk i'd ever find one in a 3\4 or 1-ton truck----much TOO rare----whereas the five speeds should be very numerious in the bigger trucks!!!fd :-X11

 

According to my Haynes manual, the Clark tranny was used in pickups. Does anybody know if that is true? And if so, will it bolt right in on a F150 with a New Process 435?

Thanks,
jnorris
'78 F150 4x4
400M with Aussie Cleveland Heads

 

I think the distinction that needs to be made here is the clark tranny's were a SPECIAL order--not standard issue---the np-435 , t18, & t19 was the trannys normally put in all trucks(f100,f150,f250,f350)---in addition---I don't think you could order a clark in an f150---it was only available in f250's and 350's-----it will boltup to a bell housing for a np-435---I THINK---but you would have to do some fabrication---obviously----I stand to be corrected as far the matchup goes-----maybe DF will comeback and illuminate the issue for us!!!!!!fd :-X11

 

Sorry, it won't go on the bell you have now. A NP435 has a 8 1/2 wide by 6 1/4 tall bolt pattern with a 4.875 hole in the center. The clarks (mine at least ) have a 8 1/2 wide by 4 7/8 tall pattern with a 5 1/8 tall hole. I have the bell from the FT engine this tranny was behind, it bolts to any FE. I also have the flywheel, and it has the same pattern as an FE 'wheel. If you are looking for a Clark 280 series, try to get the bell and everything all at once. I got my stufff from a salvage yard that cuts up old semis. DF

 

So DF --i'm confused now ---there is a listing here on this website who is almost in my backyard---he has a f750(w\391 not running-74 model) with a 5 speed--Will that bell housing bolt up to the back of my 400 in my 77 f250 4x4----I assumed that it would!!!fd :-X11

 

no it would only bolt up to an FE/FT engine (330,331,332,352,359,360,361,
390,391,406,410,427,428)

the 370/429/460 have a different pattern, that is shared by the 351M (except a few 73's) and 400M.



clear as mud? it wont fit your 400, try a early 80's F-600 with a 370/429 in it.