W59 to R155

bump for updates

 

So I have a r155f if you swap the electronic tcase for a fj cruiser tcase.. Gives you manual shifter, bolts right up.. My question is will a r155f go directly behind a 2rz? Thinking of selling my 2tr and going 2rz or 3rz.

 

I know that the transfer case pattern is slightly different from an R150f and R155f.
The r155f has a wider pattern on the passenger side, if you look close at that dowel on that side if the bolt hole is really close to the dowel, you have a r150f style older transfer case that was on 3rd gen 4runners, 1st gen taco, and not sure what else.
The 4th gen 4runner, 2nd gen tacoma etc... gx470, auto and manuals all use the newer style with the wider pattern, the dowel and the bolt hole will be more spaced apart.
Now the spline numbers change from certain auto and manuals depending on models (like fj manual), but I am just talking about the bolt pattern.

I know cause I tried to bolt a fj cruiser case I put together to a r150f, and realized I needed a r155f to use the newer transfer cases on my first gen...
So i just bolted the first gen transfer case to my r150f and all was good again.

So basically, if you use a R150f you have to use the older transfer cases.
If you are using a R155f and hoping you can bolt up your stock 1st gen transfer case... you will be in for a surprise at the end cause you need the newer transfer case also.
As said earlier that fj auto transfer case with the manual shift is as close as you are going to your original J shift case, cause the newer taco ones are electronic.

I took apart a 6speed fj cruiser full time 4wd transfercase and swapped out the front input shaft for one from an fj auto (same spline count as R series output).
That way I could have a full time 4wd box that would bolt to a R155f, and have it completely manual shift.
Basically made a v8 4runner transfer case the hard way (Which has full time and the correct splines for a R series already), but those are fully electronic and need the 4wd ecu and a bunch of wiring and I am not a big fan of that.

Still haven't bolted it up to anything yet cause of my R150f vs R155f mistake... someday I will grab an R155f and toss it in and see how it does.

 

There are variations of the R-series transmission, however the bolt pattern on the case is the same for all of them. What changes is the extension housing/adapter that goes between the transmission and the transfer case that has the shifter in it. Again, there are small variations, but there are two major types of adapter: early style without a reverse synchro and late style with reverse synchro. The change happened in 1994, so anything after that will have the newer style.

The R150/1/2/3/4/5/6 designations all have to do with the gear ratios and nothing to do with other variations (synchro type, input shaft length, etc.), and so have been used for many years in many applications. There are R150F's that are of the older type and newer type, with the older t-case and newer t-case.

If you want to use the newer style transfer case on an older R150F, it should more or less be as easy as getting the extension housing that mates that type of t-case to the R-series transmission. For the transfer case from a 2005-2020 Tacoma, 2003-2020 4Runner, 2007-2014 FJ Cruiser, etc., you need extension housing 36107-60080.

There are two length of input shafts available for the R-series. 5VZ (R150F) used the longer shaft, while 2TR (R155/155F/156F) use the shorter shaft.

From what I have read, when using a TR bellhousing on an RZ engine, you need the longer input shaft, but I can't confirm or deny that. If it is the case, using a 5VZ R150F with a TR bellhousing you should be good to go. If you are going to use an R155F or R156F you may need to swap the short input shaft out for the long type.

Long input shaft for an R150/1/5/6: 33301-60120
Short input shaft for an R150/1/5/6: 33301-26060

Transfer case extension for using 1995-2004 style transfer case: 36107-35160
Transfer case extension for using 2005-2020 style transfer case: 36107-60080

Jeff

 

I put a 3rz in front of my 155f and it all seemed to bolt up correctly.. felt like the input made contact but it also hasn't moved is still in progress..

 

Let us know I haven't confirmed myself the 155/156 use the shorter shaft just what I have read.

Jeff, you are right about the extension housing being different and you could swap that, but that extension housing new costs more than I can get a whole low mileage r155f for, but if you need the long shaft and the newer transfercase you could swap the housing onto a r150f yes, lots of combos out there with the R stuff.

For the 3.4l, you can use the long or the short input, just have to use the right release bearing and bellhousing (3vz vs 5vz).

 

Yeah I will mess with it. I've been thinking of getting ax15 and swapping my 155f bellhousing on it to be able to run an atlas with no adapters.. anyone else do anything like this? Or ax15 output?

 

My concern would be that if you had the shorter input shaft that while it the splines may partially engage the clutch disc, the shaft itself won't have hit the pilot bearing, leaving it unsupported.

True, it's a pricey option if you were to order a new one. That said, you can find them used as well, and sometimes cheaper if purchased overseas, etc. Definitely wouldn't be my first option, but it's nice to know it exists.

Also true, that said, I would expect using the other bellhousing would also necessitate changing or modifying the shifter and transmission mount as well. Not sure if that's easier than getting the right housing and input shaft or not - probably depends on the situation.

Jeff

 

Ax15 is a long shaft and one of the more longer ones if I remember right, so it might bottom out with the short bell. you can chop some off the end of the input or swap inputs though if you want that transmission, but they are older and notchy. I would use a R155f and an adapter to use a newer trans.

There are lots of R155f's around for sale in the states and they aren't that expensive.

Yeah with these hybrids, mounts and driveshaft are issues you have to sort out but usually it isn't so bad as the difference aren't huge. Shifter would probably still work ok.

 

Yeah I'll slide it back and grab some measurements

 

A couple pics of where you are measuring and how long that input shaft is would be great cause I have not seen the measurements anywhere yet for the R155/R156.

 

Yeah I'll get some.. any measurements for the 150 that would be behind a 3rz I can compare to?

 

This thread has pics of the long and short ones with a measurement.
https://www.tacomaworld.com/threads/r150f-input-shaft-length-different.521289/

Do note the earlier short shaft pre-96 r150f is a passenger drop normally, so if you need a drivers drop with a short shaft the R155f would be your best bet (After confirming it is short shaft).. and I would put an fj full manual shift case behind it.

I don't know what the 3rz actually uses (short or long) as I haven't worked on that motor so I sort of glossed over that info but its out there.
*edit* it seems with the 2TR bell you need a long shaft version from random posts online.. which would be 96+ r150f

curious to see how long the r155f one actually is though, might be just barely long enough to work can't be sure until its measured and/or tested.

 

actually this thread post 11, they said they took 30mm off the input shaft of the r150f with the 2tr bell... and the difference between short and long is like 1.5". I am assuming the turned down the splines for an input bearing after that.

So the R155f might actually be closer to right than either of the r150f's, interested in seeing the measurements just seeing alot of speculation everywhere else
https://www.tacomaworld.com/threads/anyone-swapped-in-a-r150f-behind-a-3rz.451289/#post-13272619

 

Yeah I'll get some measurements with pictures this weekend probably..

 

Basically back story on my truck, rolled it, solid axle, and kept cutting til not much of the truck was left and turned it into a buggy.. I have a fj case and crawl box already mated to the r155 got the 3rz after finding my 2tr had lost compression while trying to sort out some wiring... and 3rz is easier for my application as far as wiring goes.. and have been tossing around the idea of selling the dual setup and getting a 2speed atlas instead.

 

Looks sweet, I say keep what you have, that combo is pretty awesome if the input part works out and maybe slap a turbo on the 3rz.
Those ax15's are old and harder to find in good shape, not sure if that is worth having an atlas, never used one.

You have alot of room now I would imagine up front, have you considered grabbing a 1uz from an old ls400 instead?
you would have torque for days and it is pretty indestructable... I don't think you would have to worry about the body lift for hood clearance lol.

 

Yeah I actually have a buddy with a 1uz he's putting into his first gen 4runner.. but im staying pretty small as far as my buggy goes. Toyota axles still. 37s maybe a little bigger.. Belly height is like 17in or so.. but I'll probably build a turbo manifold for it and run like 10psi

 

I have an R151f that I want to put in a 2006 Tacoma so I am looking for everyone’s opinions. I found out from above (Jeff Lange )that I can use the newer style transfer case with the R151f with the extension housing 36107-60080.
Alternatively, I can buy a complete used R156f 6 speed for about the same price and use that without having to use the extension housing or changing transfer cases on the R151f.
So question is which is the better transmission/transfer case combo: the R151f 5 speed w 2006 transfer case or R156f 6 speed stock from factory?
Thanks in advance for the opinions,
Craig

 

The R155f and R156f are both on the newer tacomas and are both 5 speed transmissions. The R156 has another upgrade on some synchro or something, basically the same transmissoin though.
It depends on what you are trying to bolt it up to and the bellhousing. the newer R155/R156 have the shorter input/bellhousing cause they mated to the 4 cylinder.

If you have an oldschool R151f from like the turbo mini-truck, that would be short shaft and passenger side drop with a gear driven case... so you will need an adapter or that extension housing, and you would be wasting a perfectly good R151f which are hard to find in good condition these days. It would be much more expensive and much more wasteful to try and do it this way, you could sell the R151F to someone with a minitruck and buy a couple R155fs for that money (which have 2 decades worth of internal upgrades to synchros etc.. over the very old r151f), and your tacoma transfer case would be a straight bolt on affair if it is the newer style one with a R155f or R156F and you wouldn't even have to open it up just drain and refill the trans if its a good trans.

Basically, choose the R series transmission according to the transfer case you want to use if you have an engine that needs the short shaft or can use the short shaft, and if you need the long input shaft then you may need to do a hybrid.