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new guy with a tucker gear question

Does anyone have a picture of one of these tucker transfer boxes? The description is making me think that they are a NP200 with the shift function removed.
 
I don't have a photo.

However the transfer case housing itself consists of two aluminum castings which bolt together. One of the halves has raised letters (indicating they are part of the mold) that say "Tucker Sno Cat". That (along with conversations with Jeff at Tucker) leads me to believe it is a Tucker built (or manufactured for them) product.
 
I know these don't give you the clearest view of the transfer case, but hope they help.
 

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That is definitely a custom made gear box. If I was wanting to change to a two speed case I'd look at a NP200 though.
Divorced, 1:1 and 1.9-something to one, already set up for a brake in many applications, and most importantly, available with front and rear out puts in line.
The fly in the ointment is that they are not really meant to run completely vertical, but they do get run that way in some mud trucks.
 
Does anybody know if the front axle on these (dana 60) are simply a rear axle dana 60 turned upside down or are they right side up with a reverse rotation forward output from the t-case?

Just wondering for when i scrounge a new gear set for my 1342. Wondering if I just need a pair of dana 60 rear axle gear sets or???
 
Dave,

I think they are a rear axle that is turned around. But they are not upside down.

Due to the shape of the differential cover, they can only be installed one way. If it were upside down, the filler plug would be in the wrong location height-wise.
 
Sounds right to me. they must feed rotation in reverse on that front drive shaft then? I always mean to try and get a look at which way the front is spinning while one of my friends drives it ahead but i keep forgetting.
 
Dave, The transfer case is a very simple design with an input gear and shaft, idler gear, and output gear and shaft. The output shaft is one pc splined on both ends for the yokes. The drive shafts both turn the same dirrection. The ring and pinion are both standard dana 60s. The front is always turning in reverse while driving forward. No big deal; mine's been doing it for 32 years and is in the same condition as the rear. The ring is dated 12/78
 
Thanks, that's good to know. I located a set of loaded carriers with ring/pinion 3.5-ish ratio, $150 for the whole works to change out my front & rear. I'm thinking it might be worth a try.
 
There isn't an easier vehicle to work on differentials that has Danas. The cats are already jacked up and you don't have to pull wheels or anything.

I set up the front 44 in my 66 Bronco with no housing spreader. I borrowed a dial indicater and ground out the old bearings so I could keep checking back lash with different shims then when you press on the new bearings you add a thin shim to both sides because you press all the slack out of the shims. I think I followed directions that came with the new gear set. That was 20 years ago and they're still working. The nice thing with the cat is you don't have to worry about getting it perfect because you'll never hear if it howls at 60 mph.... well at least if you keep the CD player load enough:biggrin:
And I 'd love you to try it first in case it doesn't work:whistling:
 
Well I did some work on a dana 44 front once and I've worked on 9" fords...

I think I'll try it but I have my tucker parked on lake of the woods now so it won't be any time real soon.
 
Good plan, force yourself to work on it in the summer. I'm not smart enough to work on mine when it's warm out and it doesn't have to be done yesterday:hammer:
 
There is a lot of talk about installing transfer cases like an Atlas or 205. Anyone with a Tucker take a transfer case out of any 4X4 like a Jeep or Chev for example and lay it next to the Tucker and compare the 2. What do you see wrong with trying to install a transfer case in place of the Tucker drop box? I'm not saying it's not possible. Picture it and you will see there is some huge differences between the 2. The Tucker unit is built by Tucker and is 1 of a kind. A standard straight through transfer case has the rear output positioned in line with the input and the front output at the outboard end of the case. The Tucker unit has both the front and rear on the same plane even sharing the same shaft. Next look at the way the Tucker unit is mounted in the frame. How much room do you have? Also, think about the end result you are looking for. The Tucker unit is 1.65 to 1 reduction. A transfer case in high range 4X4 is 1 to 1. Not much of a gain in top end performance and a huge loss on low end. I don't know about your Tucker but mine has lots of low end gearing. In my opinion, a transmission change would be much easier and could have better top end performance. For example, I have the NPG 542L 5 speed. To get more top end speed I could easily swap in a NPG 542 with the overdriven 5th gear instead of the 1 to 1 5th my trans has. Those with axle ratios above 4.88 to 1 could benefit from a ring and pinion swap to get more top end speed. I just don't see how an extensive swap to a transfer case would be cost effective and give the end result you are looking for.
 
I totally agree. I looked at a Dana 20 case that had been converted to a divorced unit and had 2.5 ratio. These are tough little gear driven boxes and I would have been able to shift it form hi to low. In theory you could use the front output for the new input and then it would have the same configuration as the Tucker. But after looking at how tight my transfer case was packed into my mid-engine frame and the yoke difference and brake disc mounting, etc. I decided to scrap that idea and just look at a gear change. I like you're overdrive idea. Mine has an Allison so as long as it holds together, it won't get changed.
 
I went over the divorced transfer case idea awhile back and in theory you could flop the T-case up and connect the front output to the driveshaft from the transmission and connect the rear output to the rear drive shaft and the input to the front driveshaft but- in 4X4 high range everything would work at a 1 to 1 ratio. Shift into 4X4 low and thats when the fun begins- the front output which is now the input and the rear output will now be 1 to 1 and the input which is now connected to the front drive shaft will be overdriven causing immediate and catastrophic damage with still no gain on the top end performance. Also, sorry for thinking your van was a VW. I looked at your thread and I really like your conversion. My aunt had the same Chevy van when I was a kid and it had the fiberglass cap on it so a full grown man could stand up inside it. I really don't see those much anymore so you have a great unique conversion. Good to see the family inside with smiling faces. Best regards.
 
Swamp Cruizer said:
I totally agree. I looked at a Dana 20 case that had been converted to a divorced unit and had 2.5 ratio. These are tough little gear driven boxes and I would have been able to shift it form hi to low. In theory you could use the front output for the new input and then it would have the same configuration as the Tucker. But after looking at how tight my transfer case was packed into my mid-engine frame and the yoke difference and brake disc mounting, etc. I decided to scrap that idea and just look at a gear change. I like you're overdrive idea. Mine has an Allison so as long as it holds together, it won't get changed.
Click to expand...

I gutted my dana 20 and installed the gears out of a dana 18 from an early Bronco.It was a lot of work,but it had a really good low range.
 
muley180 said:
Shift into 4X4 low and thats when the fun begins- the front output which is now the input and the rear output will now be 1 to 1 and the input which is now connected to the front drive shaft will be overdriven causing immediate and catastrophic damage .
Click to expand...
DUH:bonk:Of course you're right. I guess I wasn't thinking that one through. Thanks for the comments on the conversion. I know it's different but very practical. It took a huge amount of hours because I really wanted to do it right. It still has a lot of work left to finish it the way I'd like it and I'm not sure if I'd do it again or not considering the strain it put on the family since my kids aren't old enough to really help me with it. They will be soon however and hopefully they will want to help with the finishing.
Cruizer
 
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