brownie problems
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brownie problems
Hello im new to this diesel thing. ive learned that my current ruck is not a fan of the e4od. through a stroke of luck i found a NP435 in my 76 f150. after some research it should hold up better than the automatic. my problem lies in the new transmission. with my current setup i will be lucky to hit 35 mph downhill with the clutch held in annda good tailwind. so naturally im going to use a pretty steep overdrive. my question: is it possible to use an auxilary transmission. not conventionally, i want to use the under drive as the overdrive and want to know wat exactly it will take to bolt a brownie on backward so under drive is my overdrive. any advice is helpful. and ive only heard of this configuration being used once.
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Joined: Feb 2011
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From: Princeton MN
I think that np435 would have poor gear spacing for a diesel, and those brownies have pretty deep reductions in them which would equal major overdrives! And on most transmissions the gears are hardened on only on side, running it backwards would put the load on the soft side of the gears, being they are made so heavy anyway I don't think that would be an issue.
If you have an NP435 look into this
Ranger Overdrive
If you have an NP435 look into this
Ranger Overdrive
Post Fiend
Joined: Nov 2005
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From: Charles Town, W bygod Va
Is the e4od not working? If you want a MT then a zf5 swap would give you OD, plus bolt on parts can be foound at the salvage yard. Depending on what rear end gearing you have, it should go way faster than 35 without the od. I find myself cruising at 55 in 4th gear a lot to keep it in the powerband. (Same 1:1 ratio as 4th in the np435).
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well i destroyed the pump in both transmissions and the NP435 is free plus i have a two speed rear end that was originally going behind the e4od. another reason for the NP435 is the insane shortage on the zf 5 speed. if its not over a thousand it needs rebuilt and ive always wanted a truck that would literally pull a house off the foundation. as far as i can tell all i need now is a browny box.
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From: Terre Haute, IN
Something i've always wondered, with a double overdrive are we going to start having to worry about exceeding the max safe speed of the driveshaft?
If i've got the math right (assuming a basic 5831 brownie) under in revers would give you a 0.5:1 overdrive and over would now give you about a 1.37:1 underdrive... That wouldnt really be too bad coupled with the 435 which i think already has a pretty steep 1st...
If i've got the math right (assuming a basic 5831 brownie) under in revers would give you a 0.5:1 overdrive and over would now give you about a 1.37:1 underdrive... That wouldnt really be too bad coupled with the 435 which i think already has a pretty steep 1st...
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ive also been toying around with the idea of turning my transfer case around. it appears more complicated and im only going to try this if i can get two matching rearends. thanks for the advice and input. i appreciate it. im going to start my search for a browny, take wat i can get, and put my truck back on the road asap.
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Laughing Gas
Joined: Sep 2007
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From: Near Shenandoah Valley
I'm not sure i understand, I thought coupling the aux. trans behind the main serves for under drive, unless trans has an overdrive. Aux. trans in 4th is 1-1 correct? Whether trans is installed either direction this is true, flipping it end to end somehow results in over drives?
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Posting Guru
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From: Princeton MN
I'm not sure i understand, I thought coupling the aux. trans behind the main serves for under drive, unless trans has an overdrive. Aux. trans in 4th is 1-1 correct? Whether trans is installed either direction this is true, flipping it end to end somehow results in over drives?
Laughing Gas
Joined: Sep 2007
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From: Near Shenandoah Valley
This is what I was thinking. I would really need to make sure I watched my meds. if I tried it. This arraignment would benefit my 4.10 but not my 3.55 as much. I like the idea of a double overdrive on the 3.55 but really need to gear it down for towing. I will study this some more but try to collect parts. would a 5 speed reversed give the one gear reduction? Makes since.
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ur definantly right about the three speed auxiliaries. but my problem is the tranny i have fourth is around 3.53 to1. to get my highway speeds back i need the overdrive. a .4 or .5 would work. i can use steeper but ill definantly need the two speed rear end. fun stuff. and actually ive come across another four speed i may be able to pick up cheap. ill do the math and maby that will work better.