Top loader specs

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Offline Ash

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Top loader specs
« on: December 26, 2013, 11:51:31 pm »
I need some info on some top loader measurements if anyone has them or knows of a good reference.

I'm trying to find out exactly the input shaft length and bolt pattern from trans front to bell housing. I am hoping to fit an F-truck trans to a top loader bellhousing. From some info I can find, it should work. But am wanting to find out more before I place an order on a new bellhousing. I don't want to spend the money they are asking to not have it fit.

The specs I have on the F-truck 4 speed, NP435, are as follows.

The Ford NP435 has a 1-1/16" diameter, ten spline input shaft that has a stick-out of 6-1/2" from the front face of the transmission. The pilot tip of the transmission measures ~17mm. The front bearing retainer flange measures 4.85" and the bearing retainer tube is 1.43" in diameter. The front bolt pattern is the symmetrical Ford "butterfly" pattern; roughly 8-1/2" wide by 6-5/16" tall.

http://www.novak-adapt.com/knowledge/np435.htm

I have found info that says the "butterfly" pattern is the same as the Top Loader pattern but I just can't find the info to reassure this.
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Offline skip70

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Re: Top loader specs
« Reply #1 on: December 27, 2013, 07:26:07 am »
These measurements are from a small block one. Starting from the pilot tip. 0.675" dia x 1.15" long, 10 spline 1.050" dia input, bearing retainer 1.425" dia snout, the flange dia I forgot to measure doh! and the case holes are 8.5" across and 6.25" top to bottom approx. The input overall is 6.5" long.

Trust that helps.
 
Skip70
 
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Offline Ash

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Re: Top loader specs
« Reply #2 on: December 27, 2013, 07:52:18 am »
That's very helpful, Skip. Looks like it will work. Great!

I appreciate you chasing that up for me. It's the last bit of info I need for the puzzle.

Thanks  :thumb:
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Offline Pinto Pete

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Re: Top loader specs
« Reply #3 on: December 27, 2013, 02:38:07 pm »
Nice,.. digger gears for the fasty,you da man Max..... :thumb:
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Offline Ash

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Re: Top loader specs
« Reply #4 on: December 27, 2013, 05:44:11 pm »
Could you imagine that, a 6.68:1 granny 1st gear behind a 461ci FE. What kind of mess would that make?  :lol:

I'm actually dropping a 5.4 3V into my F150. Finding which bellhousing to use hasn't been the easiest. Would be much easier if it were a 2x4 but she isn't so I need to keep the NP435 in it.
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Offline Pinto Pete

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Re: Top loader specs
« Reply #5 on: December 27, 2013, 10:42:50 pm »
keep up the good work Max... :burnout:
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