R155 Transmission?

[limequat]

Anybody know about the R155 transmission in newer tacomas? Looks like an evolution of the R150, as 2-4 gears are the same ratio. This could be an honest Toyota version of the Aisin AR5.

 

[Nick M]

How new of a Tacoma? Is this mated to the 4.0?

 

[limequat]

How new of a Tacoma? Is this mated to the 4.0?

At least 2005 and newer, maybe more. I think it's mated to the 2.7.

 

[drjonez]

still @ it, eh limey?

sounds like it is the toyo verion of the AR5....

 

[Jeff Lange]

I'll check into what came with it at work today.

 

[Jeff Lange]

Okay, well the output shaft is the same. Looks like the bellhousing will mount up the same. As far as I can tell, the extension housing, input shaft, and bellhousing would have to be changed. Aside from that I think it would probably bolt in pretty easily. Now the question is, what's the advantage? Probably would be a bit smoother shifting, but I doubt it's much stronger. Who knows though, maybe the thrust washer was beefed up somehow, or design changed. I may look into that.

 

[Jeff Lange]

Same part number for the thrust washer.

 

[limequat]

Lol @ the thrust washer.

If it's the AR5 design, it'll have the triple-cone synchros. Jeff, do you have a way of deterimining the input shaft length?


Dr, just curious. I'm pretty much stuck with what i got.

 

[drjonez]

ha! stuck with? sounds like a sweet setup to me.....perhaps we could slap it in my car and test it's limits?

 

[limequat]

ha! stuck with? sounds like a sweet setup to me.....perhaps we could slap it in my car and test it's limits?

Lol, my car isn't going anywhere for a while. If you want to borrow my setup for some "capacity testing" I'm game

 

[Jeff Lange]

I don't really have any way of checking input shaft length, unless I have one in stock here.... I'll check on that.

 

[Jeff Lange]

Nope, don't stock them. Sorry man. Might be able to check some Tacoma forums, but the R155 was only used on 2WD trucks, and most of the Tacomas are 4x4 at this point IIRC.