are the clutch's interchangeable on a 4 speed manual ?

 

That's a loaded question. Yes if you are talking about clutches for the same engine/tranny. But, and this is a huge "but", you have to also have the larger pressure plate to accommodate the larger clutch disk, and your flywheel has to be drilled to take the larger pressure plate.

 

that's what I'm wondering I read some post where some say flywheel drilled for both
I have 86 351w with 4speed f250

 

or does 3/4 tones come with larger clutch like the 11

 

I hope this doesn't come off as harsh or talking down to you. But, you need to help us help you. If you want guesses that may cost you big bucks and cause lots of frustration then just ask questions w/o telling us everything we might need to know about the truck. However, if you want solid answers that you can comfortably make purchase decisions on you'll need to tell us more. For instance, when talking about a clutch the year, the engine, the transmission, and whether it is a 1/2, 3/4, or 1 ton truck makes a huge difference. So, you can either tell us that every time you ask a question, or put the info in your signature via the User Control Panel.

So, lacking the specifics, I'll say that usually the 3/4 ton vehicles come with the largest clutch - typically an 11". But, I can check that in the Master Parts Catalog if I knew all the details, although it'll be later today before I can get to it.

 

In my opinion, the best thing to do is take it apart and look because, after ~30 years, there's no telling what may be in there right now.

BTW I don't display any sigs at all (some of them take up WAY too much real estate IMO) and, besides that, it has always been good netiquette to provide all pertinent information in the body of the post when asking questions and looking for help on any Internet forum. Make it as easy as possible for somebody to help you....

 

i don't mean to be rude but i did tell ya was 250 351w 4 speed
sorry don't know what kinda 4 speed in it
just know its a 4 speed and truck year is an 86
wife wanted to get me parts for xmiss so I am trying to get a list going an clutch is one for when i drop in a crate this spring

i see lots of guys sayin a 11inch clutch will bolt up to a 10 i just wondering if that's true or false or did 3/4 tone fords come with an 11 inch clutch from factory

 

My son has a 1984 F150 with 4.9L and 4 speed manual O.D. transmission. I own the same except it is a 1986. Both came standard with 10". When time for clutch replacement came, both were upgraded to 11". The flywheels came drilled with both patterns. If I remember correctly, the 11" required larger diameter bolts. The kits [clutch, pressure plate and throwout bearing] cost ~$25 more for the 11".

 

My apologies - I had most of what I needed, although I might need the year. I will look at the catalog tonight to see what came standard in the 250.

But, Chris has a good point about checking. But, since you will probably buy before taking it apart, I would buy from somewhere that takes returns. Like Amazon. Many of the auto parts houses give either store credit or return a portion if you buy something else from them.

 

I have an '85 with the 351w and NP435. When i built the motor the flywheel in my truck was drilled for both a 10 and 11" clutch, but the bolts for the 11" are bigger. I don't know if that is standard on all trucks of this vintage though.

 

thanks guys exactly what info I needed
found a spot than can get them in over night so I just got to remember order bolts for the 11 I priced a fly wheel for the 11 inch clutch it was only 120 so ill order one just uncase my fly wheel aint drilled
thanks again guys

now just front left spring hanger another trouble part to find

 

u sure was a NP435 I been researching and only up to 79 they used Np435
was either borg warner T18 or T19 T 18 looked like the np435
maybe im wrong too

 

I don't know where you did your research at, but it was a corrupted file. The NP435 was used until '92 by Ford. This is the 3rd f-150 I've had with one, the other 2 were 86's with the 4.9(wish I would of held on to those!). It is easy to tell the difference when you get under your truck and look. The fairly large "NP" logo stamped into the case gives it away every time!

 

like I said I could be wrong I don't believe to much I read on internet
this is the site
Manual Transmission Identification Guide - FORDification.com

 

Has to be a typo, maybe they meant to say till '89???