[Toy2play]

Originally Posted by Rockdawg84

Totally understand Great looking rigs!!

What CV axles are you running on that beast?

[Rockdawg84]

Originally Posted by Toy2play

What CV axles are you running on that beast?

Just OEM remans from O'Rielys with life time warranty. My hope is that they will hold together since there is very little shock load on them in double low

[RussToy]

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I've never thought about doing it this way. I've always planned to go with an Atlas II transfer case. Has anyone use an Atlas...or is this the preferred method?

Thank you
- Russel

[Sean K.]

Originally Posted by RussToy

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I've never thought about doing it this way. I've always planned to go with an Atlas II transfer case. Has anyone use an Atlas...or is this the preferred method?

Thank you
- Russel

I've got both....an Atlas II in my buggy and I've had dual Marlins in a 91 Hilux and now a 99 T4R. IMO, the Toyota cases are a better design in terms of packaging....though you can't argue they are as strong as the Atlas. I also have a 3 speed TWF Hero case for my next buggy....but I can't tell you anything about that as I haven't run it yet. If money's no object, get the Hero....but from most rigs, a dual Toyota case is fine.

[eimkeith]

Originally Posted by Rockdawg84

you will need a reduction box from an early (pre tacoma) 4cyl pickup or 4runner. preferably 1985-1988. .

what's a reasonable price for a complete transfer case for this? (semi-local guy has one)

[Rockdawg84]

Originally Posted by eimkeith

what's a reasonable price for a complete transfer case for this? (semi-local guy has one)

I don't know about your area but here in Arizona I have seen them from $150 and up, I wouldn't pay more than $200 because you can get a brand new heavy duty box from Advanced Adapters for like $199. What is he asking? Remember, I would encourage you to put a set of bearings in the case since the old ones are probably 30 + years old and usually abused as in never having the oil changed etc, and since you have to buy a 23 spline gear in it you are really just paying for the case, and some bearing retainers, syncro hubs and shift forks. The syncro hubs will be the hardest to get.
here is the link for the Case from AA at Lowrange offroad:

http://www.lowrangeoffroad.com/toyot...e-51-5911.html

Shift forks
http://www.lowrangeoffroad.com/toyot...ion-kit-a.html

[eimkeith]

Originally Posted by Rockdawg84

I don't know about your area but here in Arizona I have seen them from $150 and up, I wouldn't pay more than $200 because you can get a brand new heavy duty box from Advanced Adapters for like $199.

and if it comes with 4.70 gears?

[rkntoy]

Had some time yesterday so zapped off a few emails to try and locate a vendor willing to do a group buy on adapters and related parts.

More to come hopefully...

[Rockdawg84]

Originally Posted by eimkeith

and if it comes with 4.70 gears?

The box is clearanced for 4.7 gears but doesn't come with them. That would be a killer deal.

[eimkeith]

I'm still not clear about the 21/23 spline but and how it relates to the gearing..

If the 1st gen transfer case has 4.7:1 gears included, would they necessarily work with the 23 spline conversion?

It looked like at least on one of the gears was made into the shaft (from what I could see in the little internet photo)

Is this not the case?


Sent from my iPhone using Tapatalk

[Rockdawg84]

Originally Posted by eimkeith

I'm still not clear about the 21/23 spline but and how it relates to the gearing..

If the 1st gen transfer case has 4.7:1 gears included, would they necessarily work with the 23 spline conversion?

It looked like at least on one of the gears was made into the shaft (from what I could see in the little internet photo)

Is this not the case?

So this is a good discussion that we haven't had here yet. The 21/23 spline issue really has nothing to do with gearing except as it has to do with input spline count. Originally Toyota only made 21 spline transfer case input shafts that are yes on the reduction gear. Then when Toyota released the 22ret (turbo) they increased the spline count and therefore shaft size to 23 to deal with the increased torque and power output. Our trucks with the 3.4L engines all have 23 spline transmission output shafts. There is a sleeve that goes between the transmission output shaft and the input shaft of the transfer case. So we have to change the gear set in the reduction box to go from 21 spline to 23 spline so they can work together. If you found a transfer case from a turbo truck or Runner then you wouldn't have to change the gear since it would already be 23 spine, but they are like hens teeth. So since we have to change the gear set to match the spline count it gives us the chance to change the gear ratio at the same time.

Clear as mud I know. LOL

@eimkeith is the case you are looking at already have 4.7 gears in it? if so make sure you confirm that it has 23 spline, if it doesn't then I would pass as they most likely want to much for a case you will have to change the gear set in anyway. But if it is in good shape you could sell the gear set to a mini truck guy to recoup some of the cost.

BTW. For guys doing this with the 4cyl. I believe that you have a 21 spline transmission so that makes things a little less expensive in this process.

[BrandonF]

Originally Posted by Rockdawg84

So this is a good discussion that we haven't had here yet. The 21/23 spline issue really has nothing to do with gearing except as it has to do with input spline count. Originally Toyota only made 21 spline transfer case input shafts that are yes on the reduction gear. Then when Toyota released the 22ret (turbo) they increased the spline count and therefore shaft size to 23 to deal with the increased torque and power output. Our trucks with the 3.4L engines all have 23 spline transmission output shafts. There is a sleeve that goes between the transmission output shaft and the input shaft of the transfer case. So we have to change the gear set in the reduction box to go from 21 spline to 23 spline so they can work together. If you found a transfer case from a turbo truck or Runner then you wouldn't have to change the gear since it would already be 23 spine, but they are like hens teeth. So since we have to change the gear set to match the spline count it gives us the chance to change the gear ratio at the same time.

Clear as mud I know. LOL

@eimkeith is the case you are looking at already have 4.7 gears in it? if so make sure you confirm that it has 23 spline, if it doesn't then I would pass as they most likely want to much for a case you will have to change the gear set in anyway. But if it is in good shape you could sell the gear set to a mini truck guy to recoup some of the cost.

BTW. For guys doing this with the 4cyl. I believe that you have a 21 spline transmission so that makes things a little less expensive in this process.

Due to this 21-23 spline issue, I've realized that it makes sense to just go ahead and do a 4.7 setup, but are you saying that doing so requires modification to the box to clear this different gear set?

[eimkeith]

Originally Posted by Rockdawg84

@eimkeith is the case you are looking at already have 4.7 gears in it? if so make sure you confirm that it has 23 spline, if it doesn't then I would pass as they most likely want to much for a case you will have to change the gear set in anyway. But if it is in good shape you could sell the gear set to a mini truck guy to recoup some of the cost.

It doesn't; it is a stock case that comes with this additional 4.7 gearset

So, I'm hearing that the gearset in question cannot be converted to 23 spline, correct? (judging by the photo, I'd've assumed that I could just buy the correct shaft from TG...)

[Rockdawg84]

Originally Posted by BrandonF

Due to this 21-23 spline issue, I've realized that it makes sense to just go ahead and do a 4.7 setup, but are you saying that doing so requires modification to the box to clear this different gear set?

Yes some minor dremel work is required to fit the 4.7 gear set but nothing major. There is a cost savings if you stay with 2.3 and just change the input gear.

23spline 2.28 Input Gear - Trail Gear

about $375 savings over going with the 4.7 set. Also, there is an argument that the 4.7 is too low. I can honestly say I can not imagine a situation where I would need lower than my current double low.

Originally Posted by eimkeith

It doesn't; it is a stock case that comes with this additional 4.7 gearset

So, I'm hearing that the gearset in question cannot be converted to 23 spline, correct? (judging by the photo, I'd've assumed that I could just buy the correct shaft from TG...)

Correct that Gear set won't work for you. If he will sell the case without the gearset for a good price then grab it Also make sure it is a top shift and not a forward shift case. A forward shift case will have shift forks sticking out of the front of the case Top shift will not.

[eimkeith]

Originally Posted by Rockdawg84

Correct that Gear set won't work for you. If he will sell the case without the gearset for a good price then grab it Also make sure it is a top shift and not a forward shift case. A forward shift case will have shift forks sticking out of the front of the case Top shift will not.

cool. moving forward on case only. thx.