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Old 10-05-2011, 02:19 AM   #1 (permalink)
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Doubler with Np435 and np202

Not sure if anyone will have very much knowledge on this but here goes. Can I make a doubler out of a Np202 and Np203? If so can I still make use of the PTO and will I be able to mount it to my dodge Np435? Need it to be passenger side drop also. Putting this in my 68 Fargo w200.

Thanks.
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Old 10-05-2011, 11:22 AM   #2 (permalink)
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Crawl ratio is piss poor at 60:1, is this possible or should I just lose my PTO and go with 203/205?
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Old 10-05-2011, 11:37 AM   #3 (permalink)
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Weren't all of the 202 divorced?

As far as I know nobody makes anything dealing with those cases.

You could run a 203/205 doubler and the 205 has a provision for a PTO. The bolt pattern for your 202 PTO is unique and different from the 205's, which is much more common and interchangeable.
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Old 10-05-2011, 11:47 AM   #4 (permalink)
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Originally Posted by 77k5 View Post
Weren't all of the 202 divorced?

As far as I know nobody makes anything dealing with those cases.

You could run a 203/205 doubler and the 205 has a provision for a PTO. The bolt pattern for your 202 PTO is unique and different from the 205's, which is much more common and interchangeable.
Hmm, 202 is really strong other than the shitty yokes but maybe I will just go with 205 and keep it simple without a bunch of fucking around. Thought Ide make due with what I have. Time to start shopping again. Also got my hubs in the mail today, good shit Chris
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Last edited by Boons; 10-05-2011 at 04:35 PM.
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Old 10-05-2011, 02:41 PM   #5 (permalink)
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Remember if you are looking to go with a NP203 based doubler that the Dodge NP203 uses a different length transmission tailshaft. Your best bet would be to rob a NP435 and matching NP203 from a '75-'79 Dodge truck and start there. If you go with just a divorced NP205, they can be a bit of a bitch to find but should be in any '72-'74 Dodge and I think they may have been used in '70 and '71 also, but don't quote me on that. They are very strong with all 32 spline input and outputs but the yokes are usually the typical crappy Detroit yokes Dodge uses on almost everything light duty. Keep in mind for comparison that with a granny gear NP435 and a NP205 you will already have gearing lower than a 727 with a NP203/NP205 doubler.
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Old 10-05-2011, 03:41 PM   #6 (permalink)
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Originally Posted by Elwenil View Post
Remember if you are looking to go with a NP203 based doubler that the Dodge NP203 uses a different length transmission tailshaft. Your best bet would be to rob a NP435 and matching NP203 from a '75-'79 Dodge truck and start there. If you go with just a divorced NP205, they can be a bit of a bitch to find but should be in any '72-'74 Dodge and I think they may have been used in '70 and '71 also, but don't quote me on that. They are very strong with all 32 spline input and outputs but the yokes are usually the typical crappy Detroit yokes Dodge uses on almost everything light duty. Keep in mind for comparison that with a granny gear NP435 and a NP205 you will already have gearing lower than a 727 with a NP203/NP205 doubler.
The 202 has the same ratio as a 205 so 1.98:1, 1st for the np435 is 6.69:1 and my diffs are 4.56:1. So roughly I have 60:1 that correct? Now Im not sure how to include tires in the formula, I'm running 42s. Maybe just swapping the 202 for 205 and not bother with a doubler. Atleast that way I have better options for upgrades and easier to replace parts. This will be a trail rig but will need to be capable of driving to and from the trails. All in All what would be the Best application. I WANT to keep the 4 speed and keep the PTO if possible.
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Old 10-05-2011, 07:44 PM   #7 (permalink)
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If the NP202 and NP205 has the same low range, there is not much point in swapping to a NP205 unless there is something wrong with the NP202, especially if you want to keep the PTO and you already have the setup for the NP202.

As fro gears, calculating, tire size, etc, this is about all you will ever need:

http://www.grimmjeeper.com/gears.html
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