Help please - always in 4wd
09-15-2010, 09:41 AM
#41
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Not years, models. Any V6 or Turbo AT 4WD has it. The H case stopped completely is 95.
Unfortunately this is ANOTHER draw back of the H case... All we've discussed so far is eliminating the ADD system to troubleshoot your problem, leaving out the transfer case as a possibility of the problem.
You do NOT need to just swap TC's... It will be far too time (time = $$$) consuming.
Actually, you need to look into retrofitting a A340f into it... If, you have plans to keep it.
More power and fuel economy, that's exactly what I'd do...
"The new A340F transmission is far superior to my A340H. It's shifts are stronger and more positive. I no longer guess if the transmission has shifted or not. With the rest of the drivetrain being direct gearing, I am getting more power to the rear wheels. After more than a week of daily driving, I also found that gas mileage increased 1.5 MPG with the new transmission and transfer cases."
Chasing down problems in the H case is just chasing your tail if you ask me.
http://www.4x4wire.com/toyota/tech/autocrawler/
Here's another link, but the Turbo being a f case is wrong.
http://www.4x4wire.com/toyota/faq/parts/
Unfortunately this is ANOTHER draw back of the H case... All we've discussed so far is eliminating the ADD system to troubleshoot your problem, leaving out the transfer case as a possibility of the problem.
You do NOT need to just swap TC's... It will be far too time (time = $$$) consuming.
Actually, you need to look into retrofitting a A340f into it... If, you have plans to keep it.
More power and fuel economy, that's exactly what I'd do...
"The new A340F transmission is far superior to my A340H. It's shifts are stronger and more positive. I no longer guess if the transmission has shifted or not. With the rest of the drivetrain being direct gearing, I am getting more power to the rear wheels. After more than a week of daily driving, I also found that gas mileage increased 1.5 MPG with the new transmission and transfer cases."
Chasing down problems in the H case is just chasing your tail if you ask me.
http://www.4x4wire.com/toyota/tech/autocrawler/
Here's another link, but the Turbo being a f case is wrong.
http://www.4x4wire.com/toyota/faq/parts/
Last edited by tried4x2signN; 09-15-2010 at 09:49 AM.
09-15-2010, 04:58 PM
#43
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Any 4cylinder has the f case, any V6 and Turbo, the H.
Did it have two lines coming out of the back of it? Or a small radiator connected to it?
If not, you could have spotted a one out of an RE. It is hard sometimes to tell the two bell housings apart...
If you tilt a V6 BH.. It looks like a 22RE to me...
Did it have two lines coming out of the back of it? Or a small radiator connected to it?
If not, you could have spotted a one out of an RE. It is hard sometimes to tell the two bell housings apart...
If you tilt a V6 BH.. It looks like a 22RE to me...
09-15-2010, 05:00 PM
#44
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Forget the drops, here's an f and an H case side to side... One's just a Tacoma..
..........................................f....... ........................................H
..........................................f....... ........................................H
Last edited by tried4x2signN; 09-15-2010 at 05:01 PM.
09-15-2010, 07:37 PM
#45
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....
Unfortunately all the pics are gone from this thread where we tried to talk a guy out of "taking my t case off". The pics were a classic mess of parts strewn all over.
https://www.yotatech.com/forums/f116...t-case-156307/
Tried using this thread to convince him but no go.
https://www.yotatech.com/forums/f116...ission-154740/
Other interesting t case/tranny reading for the curious.
http://www.fourwheeler.com/techartic...ade/index.html
http://www.naxja.org/forum/showthread.php?t=23644
http://www.toyotaholics.com/support/...=19&FORUM_ID=4
Unfortunately all the pics are gone from this thread where we tried to talk a guy out of "taking my t case off". The pics were a classic mess of parts strewn all over.
https://www.yotatech.com/forums/f116...t-case-156307/
Tried using this thread to convince him but no go.
https://www.yotatech.com/forums/f116...ission-154740/
Other interesting t case/tranny reading for the curious.
http://www.fourwheeler.com/techartic...ade/index.html
http://www.naxja.org/forum/showthread.php?t=23644
http://www.toyotaholics.com/support/...=19&FORUM_ID=4
......
09-16-2010, 05:48 PM
#46
Auto is the H transfer case...
It's all one unit...
Goog "Pirate A340 FAQ" and read up on it.
Is there a body lift on this truck?
Bone stock, no lift?
Semi...
A broke ADD will do one of two things... Break in 4WD or in 2WD. Strike that, will break with the diff locked or unlocked.
And since the hubs don't unlock, the half shafts are what's always spinning. Not the front shaft.
When the ADD slides the collar over the axle it's exactly like locking the hubs on a manual hub'd truck.
When it won't, the CV half shaft will turn the case of the diff and the spiders will rotate inside.
An unlocked ADD will not turn the front shaft going down the road.
This is the same system, only a Dodge and the diff's on the wrong side...
It's all one unit...
Goog "Pirate A340 FAQ" and read up on it.
Is there a body lift on this truck?
Bone stock, no lift?
Semi...
A broke ADD will do one of two things... Break in 4WD or in 2WD. Strike that, will break with the diff locked or unlocked.
And since the hubs don't unlock, the half shafts are what's always spinning. Not the front shaft.
When the ADD slides the collar over the axle it's exactly like locking the hubs on a manual hub'd truck.
When it won't, the CV half shaft will turn the case of the diff and the spiders will rotate inside.
An unlocked ADD will not turn the front shaft going down the road.
This is the same system, only a Dodge and the diff's on the wrong side...
09-16-2010, 06:03 PM
#47
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"One difference between ADD and non-ADD diffs is that the carrier in an ADD differential has needle bearings supporting the axle shafts at the differential. The non-ADD diffs did not have this bearing and sometimes the passenger side axle flange wears the carrier and becomes loose or wobbly, eventually causing oil leaks, noise, and possible spider gear damage."
"ADD and non-ADD diffs are swappable as are most of their parts. This makes it possible to change your ADD diff to non-ADD by simply swapping parts as I've done in the picture to the right. This is desirable to some people since some of the ADD stubs are smaller diameter than the non-ADD stubs and are therefore slightly weaker."
If you're not running HUGE tires, you can just leave it and have both shift-on-the-fly and free running hubs...
The "ADD" is just a (drive) flange that is EXACTLY like a manual hub you cannot unlock.
But it is removing a potential failure point...
Last edited by tried4x2signN; 09-16-2010 at 06:07 PM.
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