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np435 gear ratios

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Old 09-21-2001, 04:06 AM
7855F100 7855F100 is offline
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np435 gear ratios

dose any 1 know the gear ratios for the np435 1tru 4 sence ford forgot to put it in there 78 and 79 sevice manuals.
thanks
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Old 09-21-2001, 08:34 AM
lanero lanero is offline
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np435 gear ratios

1st - 6.69:1
2nd - 3.34:1
3rd - 1.66:1
4th - 1:1

I just put one in my truck, so I happened to have the numbers handy.

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Sr. Automated Test Engineer
IBP, Inc.

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Old 09-21-2001, 08:49 AM
7855F100 7855F100 is offline
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np435 gear ratios

dose any 1 know the reverce gear ratio thanks
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Old 09-21-2001, 09:12 AM
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np435 gear ratios

8.02

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Old 09-22-2001, 11:00 AM
hotboat1 hotboat1 is offline
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np435 gear ratios

Hi, The NP435 was used in trucks (Ford & Others) from 1964-1987 and was produced with 2 different ratios ! The first was a close ratio which had a 4.78 1st, 2.39 2nd, 1.37 3rd, 1.00 4th. The other (more commenly used) has a wide ratio 6.69 1st,3.34 2nd,1.79 3rd,1.00 4th.They also made these with 2 different lenght tailhousings and shafts, the long tailshaft is a 14.5 inch, I don't recall the length of the short but I want to say it was eather 7" or 8.5", the short shaft used in Ford trucks was primarily used in heavy duty trucks (1 ton and up). The long shaft is the one most light duty truck owners look for as it's a direct bolt in replacement for the 3 speed box with column shift. Keep in mind depending on your differential gear ratio the first gear on this trans may be of little use during daily driving and you will more than likely find you have a 3 speed on the floor instead of a 4 speed, opt for a 2.75 gear out back. If you simply don't like the column shifter Hurst makes a floor shifter conversion kit just for this application, simple matter of cutting hole in floor for shifter and installing a shifter boot! This is by far both cheaper & easier than a gearbox swap. Hope this will help somebody out, Dan H. (hotboat1)
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Old 09-22-2001, 01:39 PM
7855F100 7855F100 is offline
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np435 gear ratios

thanks for the realy good input
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Old 10-06-2001, 07:16 AM
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np435 gear ratios

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Where are you guys getting the ratios from because I see a discrepency on 3rd gear?

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Old 10-07-2001, 09:27 AM
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Old 04-15-2011, 09:58 AM
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Maverick Cornett
I heard 3rd gear was 1.74
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Old 04-15-2011, 02:13 PM
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Ratios, info here:

The New Process 435 Transmission - Novak Conversions
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