Author Topic: Clutch for 4x4  (Read 1525 times)

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475fetoploader

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Clutch for 4x4
« 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.
1967  Fairlane Tunnel Wedge on Proports.
1975 4x4 461 f.e. 4speed on 38’s
Love many, Trust few. Always paddle your own canoe.

blykins

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Re: Clutch for 4x4
« Reply #1 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.
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Rory428

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Re: Clutch for 4x4
« Reply #2 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.
1978 Fairmont,FE 427 with 428 crank, 4 speed Jerico best of 9.972@132.54MPH 1.29 60 foot
1985 Mustang HB 331 SB Ford, 4 speed Jerico, best of 10.29@128 MPH 1.40 60 foot.
1974 F350 race car hauler 390 NP435 4 speed
1959 Ford Meteor 2 dr sedan. 428 Cobra Jet, 4 speed Toploader. 12.54@ 108 MPH

FrozenMerc

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Re: Clutch for 4x4
« Reply #3 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"

475fetoploader

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Re: Clutch for 4x4
« Reply #4 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.
1967  Fairlane Tunnel Wedge on Proports.
1975 4x4 461 f.e. 4speed on 38’s
Love many, Trust few. Always paddle your own canoe.