Author Topic: Samurai T-case on 1981 toyota truck  (Read 3345 times)

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Gillesdetrail

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Samurai T-case on 1981 toyota truck
« on: Jan 26, 2016, 06:13:11 PM »
Has anyone installed a samurai t-case on a toyota truck? I searched google/forums but didn't find anything. I have a 1981 toyota pickup and would like lower gears for the street, and lower gears for the trail. I know running lower gears in the samurai t-case offers lower gears in high and low range. I also often see many samurai setups with toyota axles, toyota engines, and toyota truck full weight run them hard on the trails without breaking, close friends being a good example. Anybody heard anyone doing it with sucess? I could run a w-58 supra transmission with the lower 5th gear, divorced samurai t-case with 4.16 or 6.5 gears. Sounds like a good idea to me, without the need to run lower diff gears for the street, and with super low range, what do you think? My 1981 toyota weighs 2650 lbs without me and without fuel on a scale, I'm runing 31'' now but plan on running 33 or 34'' max for off-road. Won't go more than 32'' for the street. Just brainstorming ideas and would like your opinion.

toyodaaddict

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Re: Samurai T-case on 1981 toyota truck
« Reply #1 on: Jan 26, 2016, 08:05:50 PM »
I have friends/family with samurai's and it in not uncommon for them to break their zuk cases with the 1.3. I'm pretty sure a toy motor would make a bomb out of the zuk case in no time and even if it did hold up for a while it would be a big step backward in strength. Your best bet would be to gear your axles.  :twocents:
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Re: Samurai T-case on 1981 toyota truck
« Reply #2 on: Jan 26, 2016, 09:16:23 PM »
Why not just run 4.7 gears in a toy case?
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H8PVMNT

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Re: Samurai T-case on 1981 toyota truck
« Reply #3 on: Jan 27, 2016, 09:06:59 AM »
I agree that it might break but I think you should try it. If you are only running 33s that would help. Getting the high range gear reduction one in the t-case is the cool thing about the samurai stuff.  You can be the Guinea pig!
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Re: Samurai T-case on 1981 toyota truck
« Reply #4 on: Jan 27, 2016, 09:24:07 AM »
Doesn't a Sammi have an off set rear??
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Gillesdetrail [OP]

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Re: Samurai T-case on 1981 toyota truck
« Reply #5 on: Jan 27, 2016, 07:09:07 PM »
So it's just a brain storm idea, to me it would be cheaper than lower diff gears + 4.7 t-case gears, I could run a w58 transmission with a lower 5th gear,I can get the benefit of lower gears on high and on low (4.16 or even 6.5). I have friends running 36-38'' on toy axles in exocaged samurai weighing more than my truck, albeit with less power (1.6 twin cam, 1.6 16v and 1.6 8v) without issues, they do mostly rocks, one of them cracked a case once after years of beating. I like being the guinea pig and trying stuff out so I might just do it, it just won't be soon though!

redneckcustoms13

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Re: Samurai T-case on 1981 toyota truck
« Reply #6 on: Jan 27, 2016, 07:12:20 PM »
For what it's worth. I broke the case in half on my samurai running 35" ssr's on aluminum wheels. Was a stock 1.3 stock transmission 6.5 case and toyota axles... those cases are very weak.
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Gillesdetrail [OP]

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Re: Samurai T-case on 1981 toyota truck
« Reply #7 on: Jan 27, 2016, 07:12:59 PM »
Doesn't a Sammi have an off set rear??

Aahh, yes you are right



But then so does the land cruiser no? And I've seen people run LC t-cases with toyota axles. It is true though that my truck is 80% street 20% trail, as I said, just discussing!

H8PVMNT

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Re: Samurai T-case on 1981 toyota truck
« Reply #8 on: Jan 28, 2016, 12:24:39 PM »
I forget what year but one of the V8 Grand Cherokees from the 90s had a rear driveline at a bit on an offset angle in stock configuration.  I think you could run it offset t-case to centered diff as long as it wasn't too extreme of an angle.

I have no knowledge of the strength of the zuki t-case.  It may be an issue. I have always thought the aftermarket should address the idea of a lower high range gearing for Toyotas in some form, so I'd love to see somebody try this.
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Re: Samurai T-case on 1981 toyota truck
« Reply #9 on: Jan 29, 2016, 06:25:40 AM »
I have always thought the aftermarket should address the idea of a lower high range gearing for Toyotas in some form, so I'd love to see somebody try this.

I am sure you know that the factory high range is a straight through design where the input and output shafts are simply coupled in high range to achieve the 1:1 ratio. In order to achieve a higher high range ratio in an rf1a transfer box one of the housing sections would have to be completely re-cast. I suppose it could be done similarly to how the additional low range box is done, by simply adding an intermediate gear housing. Maybe you should start work on the prototype H8PVMNT?
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Re: Samurai T-case on 1981 toyota truck
« Reply #10 on: Jan 29, 2016, 01:09:51 PM »
I am sure you know that the factory high range is a straight through design where the input and output shafts are simply coupled in high range to achieve the 1:1 ratio. In order to achieve a higher high range ratio in an rf1a transfer box one of the housing sections would have to be completely re-cast. I suppose it could be done similarly to how the additional low range box is done, by simply adding an intermediate gear housing. Maybe you should start work on the prototype H8PVMNT?

Yeah I know about the strait through. It would have to be a completely new t-case.  Maybe we already have this in the Atlas? Still this is priced out or reality for most of us. I've always been jealous of the Suzuki options.  How cool would it be to have all your gearing needs met just from swapping a t-case?
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Gillesdetrail [OP]

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Re: Samurai T-case on 1981 toyota truck
« Reply #11 on: Jan 29, 2016, 01:32:55 PM »
How cool would it be to have all your gearing needs met just from swapping a t-case?

That was the spark of the idea :p

toyodaaddict

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Re: Samurai T-case on 1981 toyota truck
« Reply #12 on: Jan 29, 2016, 02:50:27 PM »
Guys, don't forget that gearing those diffs takes a fair amount of stress off your drive line, tcase and transmission.  So, there is that advantage to gearing your diffs.
80 shortbed-22re,w56,Marlin 23 spline dual cases,HighAngle drivelines,RUF/63"chevy's,35''mtr's,85 front axle,30 spline Longfields, Allpro highsteer.87 rear axle,5.29 gears,rear spool,BudBuilt cm, marlin HD clutch,ramsey 8000 winch. 
     Also 84 toy DD 22R 4.88s,33'' toyo mt'z, marlin clutch,4inch lift/63's, HA drivelines.

Gillesdetrail [OP]

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Re: Samurai T-case on 1981 toyota truck
« Reply #13 on: Jan 29, 2016, 03:40:21 PM »
That's true, my friends and I talked about that, with my 4.37 and 33''-34'' I should be fine but it may be considered for others, good point.

 
 
 
 
 

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