Engine to Transmission Question...
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Senior User
Joined: Jul 2008
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From: Las Vegas, NV
Engine to Transmission Question...
Will an NP435 Transmission out of a 1973 F-100 mate to a 1992 351W? The Windsor has a 5-speed transmission and is in an F-250. Is the pilot bushing diameter the same? And will the length of the input shaft work? Thanks to anyone who might be able to quickly answer this question, as I am considering buying the 351 w/wiring harness and computer...I'm afraid I might miss the sale, but I need info so that I don't buy the wrong parts...
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what engine did the 73 have. the np 435 i believe has an 11 mm input shaft so you may have to get a diff bearing to fit depending on what trans the 351 had on it. i know i did this on a 352 and it took an alternator bearing, 4 dollars.
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Yes I have the bellhousing that came with the NP435. Like you say, the clutch plate and even the pilot bushing weren't as much a concern as the length of the input shaft which(w/o running out to the garage to measure)I believe is 6 1/2". I may just pick up that 5-speed for future use if I make this purchase, but this Ford drivetrain would be going into a 1978 Jeep CJ-5 and I want the granny gear. Is the 5-speed from the 1983 F-250(ZF, right?)a 4-speed w/a granny low? Anyone know the ratios? Thanks.
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Joined: Mar 2005
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From: St Louis
As far as I remember the ZF 5speed didnt show up in ford trucks until ~87. The M5OD about the same time as well. But the ratios should be available for the ZF but it wont have as low of a first gear as the NP435 or T-18.
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Follow-up question...
Sorry, if this question doesn't belong here, but can you swap a flexplate for a flywheel and use an engine that was mated to an automatic transmission if you want to use a manual transmission? In my quest for a Ford small block to bolt to my NP435, I've come across a 1985 302 w/a flexplate and torque converter...
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Yes you can, just make sure the flywheel is correct for the engine. All ford engines have their crankshaft drilled for the pilot. (unlike Dodge) 302's have 2 different weight imbalances so there are 2 different flywheels. 28oz (older)
50oz (newer) Also have to make sure the pilot bushing fits the trans.
50oz (newer) Also have to make sure the pilot bushing fits the trans.
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