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FE Power Forums => Non-FE Discussion Forum => Topic started by: 475fetoploader on August 07, 2024, 08:26:33 AM

Title: Clutch for 4x4
Post by: 475fetoploader on August 07, 2024, 08:26:33 AM
Hi folks, finally ready to put my truck back together, thought I'd hit the forum up for a clutch recommendation.  NP435 with an 1 3/8 input, I'm most likely going back with 38" tires, I will probably tow things, I will abuse the clutch some.  My 428 made 534hp and 600ftlbs.  I Have a Ram 3 finger here, maybe the off-road enthusiasts have a better idea for me. Thanks friends.
Title: Re: Clutch for 4x4
Post by: blykins on August 07, 2024, 09:24:57 AM
RAM 98988.  11" Long, 550 hp capable.  Not catchy/grabby. 

I prefer the Long style plates for older vehicles.  I also prefer to use a smaller diameter pressure plate/disc when I can.  I don't like a lot of weight hanging on the back of the crank.
Title: Re: Clutch for 4x4
Post by: Rory428 on August 07, 2024, 10:08:13 AM
Are you certain that your NP435 has a 1 3/8" input shaft? Every NP435 that I have ever seen used the same 1 1/16" 10 spline input as a small shaft Toploader.
Title: Re: Clutch for 4x4
Post by: FrozenMerc on August 07, 2024, 12:13:22 PM
Definitely check that input shaft size like Rory says.  The NP435 I have sitting in the garage is only 1 1/16".  Maybe some of the medium duty applications (IH Trucks, etc) for the NP435 used a different input shaft, but all Ford pickup applications used the 1 1/16"
Title: Re: Clutch for 4x4
Post by: 475fetoploader on August 07, 2024, 12:41:37 PM
Im pretty sure its an 1 3/8 because I'm the one that put it there. New old stock from a U-haul truck place, left over from the 70's.  I think U-haul was possibly the only place Ive seen them,  They had a brand new inptut shaft, bearing retainer, bearings all in Ford boxes.  The input shaft is the only thing I've ever broken on a 435. I am in the market for a clutch fork however. Thanks Fellas.