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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

Tranny ID

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Old Jun 14, 1999 | 03:30 PM
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Tranny ID

How can I tel what type of 4sp manual tranny I have in my '71 and what year its out of?
 
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Old Jun 14, 1999 | 08:27 PM
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Tranny ID

Nick,

It would help to know what size truck you have. But otherwise, it's real easy to tell. If the shift tower (the metal piece that is bolted to the top of the transmission and has the shift arm sticking out the top) is cast iron, it is a Ford model T-18 (F-100) or T-19 (F-250). If, however, the shift tower is aluminum (you'll be able to tell by looking at it, the shift tower will be a light silver compared to the rest of the cast iron gear housing), then it is the more desireable NewProcess 435 (F-250 and always in F-350 on up).

The T-series trannies are good, too, but the NP 435 has stronger shifters, rails, shafts and gears.

Another note, if it is 4-wheel drive, then it is most likely an NP 435.

You can find out the year by recording the factory case number (I don't know where it is located) and taking it to a nearby Ford dealer (or get a Ford service manual from 1971) to be decoded. I recommend going to the dealer, they should know where to find the case number.

Good luck!

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Old Jun 14, 1999 | 11:53 PM
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Tranny ID

I know it isnt origonal but it is an NP 435. the truck is only an F100 but the engine and tranny have been replaced before I bought it. I cleaned it up and on the aluminum was a sprocket stamped on the top with "NP" in the center. below that was another circle with "68" in the center. Is that the year? Thanks.
 
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Old Jun 22, 1999 | 11:29 PM
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Tranny ID

Nick-Man...

there is an id tag on the NP435 under all the goo (LOL) which sits under two bolts at the mounting flange of the side cover. If you get under the vehicle and look where the fill/drain plugs are, just forward of them is a bolted-on plate, (like
4"X4"), and the complete data identifying the tranny is on that tag. It's often covered with goo--a nasty mix of gear lube and road asteroids and you'll have to scrape some of that off to see it. Just removing the two nuts that hold the side cover in that position allow you to remove the tag, and then take it to your favorite place to tell you what you need to know.

cw
 
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Old Jul 4, 1999 | 12:19 PM
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Tranny ID

I have scans of the top covers of the Borg Warner and New Process 4-spd Trannies on my page to help you distinquish between these transmissions.

Stock Man
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Old Jul 4, 1999 | 12:47 PM
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Tranny ID

 
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