06-01-2015, 11:09 AM
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#1
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Transfer Case differences ?
Tried searching but couldn't find the answer.
I know the SR5 has a dial and the Trail has a lever, but does anyone know if the actual transfer cases are the same or are they different models?
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2015 Toyota 4Runner SR5P
2006 Toyota RAV4
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06-01-2015, 11:14 AM
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#2
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they are the same, only the Limited is different
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2012 Magnetic Grey Metalic SR5 w/ upgrade pkg (Canada) 
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06-01-2015, 11:23 AM
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Same except the dial uses servos bolted to where the cover plate would be for the levers on the lever actuated transfer case. You could convert one to the other pretty easy if you had a donor vehicle.
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06-01-2015, 11:23 AM
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They are different models.
The dial-type uses electric motor actuators at the end of the transfer case. The lever type is actuated by the lever from the top.
The gear forks are likely different, the shafts they fide upon appear different in the parts diagram. The shafts will ride in different holes in the front and rear of the case, I don't know if those cases are the same or not. Both sets of holes may not be finished.
I did a rough tally of what the new parts may cost, and it looked all too easy to exceed $500.
I decided I would be better off buying a low-mile case from a junkyard and swapping them out.
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06-01-2015, 11:26 AM
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Quote:
Originally Posted by Jetboy
Same except the dial uses servos bolted to where the cover plate would be for the levers on the lever actuated transfer case. You could convert one to the other pretty easy if you had a donor vehicle.
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Jetboy we have a very very different understanding of this. I will post links to what I found when I get home tonight, could you please do the same?
As I understand it, the lever-shift model is the VF2AM, and the electronic-shift model is the VF2BM.
Your way sounds way better, hope you are right.
Last edited by delloro; 06-01-2015 at 12:13 PM.
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06-01-2015, 01:07 PM
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Quote:
Originally Posted by delloro
Jetboy we have a very very different understanding of this. I will post links to what I found when I get home tonight, could you please do the same?
As I understand it, the lever-shift model is the VF2AM, and the electronic-shift model is the VF2BM.
Your way sounds way better, hope you are right.
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After a bit of research I think you are correct. It's different from my last 4runner which had push button 4x4 and lever actuated low range. The new VF2A moves the shifting to a single rear actuator with 3 positions: 2h, 4h, and 4L all in one long shaft movement by an actuator on the rear of the case. The top shift location has been plated off entirely.
Here's a pic of the two different top plates removed:
So - no twin stick option for the sr5 without a different transfer case/internal parts swap. 2 low is pretty easy to do electronically by not engaging the front ADD, but i'm not sure how much utility that would have for most of us.
Externally they are virtually identical looking.
Last edited by Jetboy; 06-01-2015 at 01:10 PM.
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06-01-2015, 09:28 PM
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thanks for the awesome post. did you take those pictures? do you have access to those cases?
Last edited by delloro; 06-01-2015 at 09:31 PM.
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06-01-2015, 10:09 PM
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#8
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So the transfer cases are basically the same except for the way they engage in the different settings?
And it looks like they are not chain driven.
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06-01-2015, 10:24 PM
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Quote:
Originally Posted by sooperedd
So the transfer cases are basically the same except for the way they engage in the different settings?
And it looks like they are not chain driven.
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Yes.
Where did you get that? They are chain driven.
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06-01-2015, 11:13 PM
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#10
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Quote:
Originally Posted by Jeremy556
Yes.
Where did you get that? They are chain driven.
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Doh, you're right they are chain driven. Googled the model number and found the specs.
Toyota has been using them a long time. Interesting.
The same website had the specs on the transfer case that was in my '85 pickup.
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06-02-2015, 08:57 AM
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Just an FYI, the sr5 and trail both had the same manual transfer case until 2013. Not sure what triggered them to change it in 2013 on the sr5. i figured it was related to volume and the fact that the Taco used the motor driven model. Also, both models still have a motor driven actuator to engage passenger side CV axle (ADD). It seems pretty reliable, but I have seen one fail to function and leave an FJ SOL.
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2011 SR5 4x4, Magnuson Supercharger, ICON ET coil overs, MT ICON LT rear, MT offset lower links, URD Y-Pipe, TC UCAs, Baja Rack, MT Sliders, RCI Aluminum skids, 4.56 gearing with ARB lockers front and rear. 305/70 Goodyear MTRs (34") on Konig Countersteer 17x8. Addicted front bumper, Custom undercover tube protection rear. LT font or SAS going on next.
1989 Hilux - 22RE, SAS, hydro assist, Full Exo cage, dual ultimate cases, RCVs, 529s w Detroit locker rear + ARB front, Diamond Axle, bead locks, 40s.
Last edited by wfo9; 06-02-2015 at 09:04 AM.
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06-02-2015, 09:34 AM
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#12
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Quote:
Originally Posted by wfo9
Also, both models still have a motor driven actuator to engage passenger side CV axle (ADD). It seems pretty reliable, but I have seen one fail to function and leave an FJ SOL.
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What is this?
I have seen "ADD" referenced in a few threads but didn't know what it means.
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06-02-2015, 10:03 AM
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#13
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Quote:
Originally Posted by sooperedd
What is this?
I have seen "ADD" referenced in a few threads but didn't know what it means.
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A sliding collar, just to the right of the front diff, which disconnects the passenger side axle. With the passenger side axle disconnected, only the side gears in the diff turn. R&P and front drive shaft don't turn, improving fuel economy, (slightly) less wear, etc.
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06-02-2015, 10:21 AM
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#14
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^^^ what he said. Just think of it as being equivalent to auto-locking hubs. The only issue with it is that if the motor does not actuate and the collar does not slide... no 4wd. The front drive shaft will spin, but the diff will put all the power to the disconnected side.
Point is, manual T-case is not manual 4wd engagement.
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2011 SR5 4x4, Magnuson Supercharger, ICON ET coil overs, MT ICON LT rear, MT offset lower links, URD Y-Pipe, TC UCAs, Baja Rack, MT Sliders, RCI Aluminum skids, 4.56 gearing with ARB lockers front and rear. 305/70 Goodyear MTRs (34") on Konig Countersteer 17x8. Addicted front bumper, Custom undercover tube protection rear. LT font or SAS going on next.
1989 Hilux - 22RE, SAS, hydro assist, Full Exo cage, dual ultimate cases, RCVs, 529s w Detroit locker rear + ARB front, Diamond Axle, bead locks, 40s.
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06-02-2015, 10:44 AM
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#15
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The ADD actuator is what has been the most common failure part on tacomas and FJ Cruisers with the electric shifting transfer case. Not sure why they fail more often than the transfer case actuator, but that seems to be the case. Probably because they spend more time under water. If you wanted greater reliability - I'd look for a way to make a cable actuation for the ADD first.
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