Does anybody know how to bypass the speed senser for the clutch pack in the trasfer on the A340H auto tranny. I just want a flip switch or something to engage the clutch pack, I lost my 4 wheel drive a while back, and I believe the speed sensor went out on me. Sometimes I will have 4x4 and sometimes not. I know I am engaging in 4x4, I can hear it, and I can no longer spin the drive shaft. But when I put a load on it, it slips. And no, the clutch pack is not worn out, occasionally it will engage.<P>Thanks<P>------------------<BR> <A HREF="http://4x4.4t.com" TARGET=_blank>http://4x4.4t.com</A>

I don't think you can bypass a speed sensor. It provides a constantly updating stream of input to the computer.<P>I don't recall a sensor in the transfer. There is one in the tailhousing of the trans. There is a solenoid that is located in the transfer. Have you checked that? A sticky solenoid might cause what you have described.<P>I broke down and bought the AT service manuals when I was planning my AT/xfer swap. They are an excellent investment.<P>Phil<P>------------------<BR> <A HREF="http://pjohnson.netgate.net" TARGET=_blank>http://pjohnson.netgate.net</A>

<BLOCKQUOTE><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><HR>Originally posted by PJohnson:<BR><B>I don't think you can bypass a speed sensor. It provides a constantly updating stream of input to the computer.<P>I don't recall a sensor in the transfer. There is one in the tailhousing of the trans. There is a solenoid that is located in the transfer. Have you checked that? A sticky solenoid might cause what you have described.<P>I broke down and bought the AT service manuals when I was planning my AT/xfer swap. They are an excellent investment.<P>Phil<BR></B><HR></BLOCKQUOTE><P>I would go buy a manual, but I will be getting rid of the trans and transfer shortly, so it would be a waste for me. This soleniod, does it control the clutch pack, or engage the drive. Is it electric, or a hydraulic soleniod? I just want to be able to manually engage the clutch pack, even if it means tapping into the ecu.<P>------------------<BR> <A HREF="http://4x4.4t.com" TARGET=_blank>http://4x4.4t.com</A>

What tranny are you looking to swap in? I've got an auto tranny and auto style t-case from an '85 4Runner collecting dust in my garage. The t-case is fine, but the tranny does not downshift on it's own in drive but otherwise upshifts fine and shifts through the other gear selections as normal. Are you looking to swap a manual tranny in, or are you planning on rebuilding your tranny/t-case? If so, buying another set as a set to rebuild is a good way to save downtime of your own vehicle.<P>Shawn F.<BR>toyota_t100@hotmail.com<BR> <A HREF="http://www.geocities.com/toyotashawn/Toyhome.html" TARGET=_blank>www.geocities.com/toyotashawn/Toyhome.html</A>

You Said:<BR>I would go buy a manual, but I will be getting rid of the trans and transfer shortly, so it would be a waste for me. This soleniod, does it control the clutch pack, or engage the drive. Is it electric, or a hydraulic soleniod? I just want to be able to manually engage the clutch pack, even if it means tapping into the ecu.<P>I just got done fixing my A340H Tranny so I got quite a bit of experience chasing electrical signal to and from the tranny. Although I didn't have to visit any part of the transfer case I did see that the fourth solenoid is for 4x4 which is controlled by the computer. You could hot wire it but I wouldn't suggest this. It is an electrically controlled solenoid and it allows the flow of hydraulic fluid to make the transfer work. Instead of buying a manual I suggest you visit a quality library to see if they have any of the good Mitchell repair manuals. I live in San Diego and we have a huge assortment of these books that the professional mechanics rely on. Good Luck<P>John

<BLOCKQUOTE><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><HR>Originally posted by ShawnF:<BR><B>What tranny are you looking to swap in? I've got an auto tranny and auto style t-case from an '85 4Runner collecting dust in my garage. The t-case is fine, but the tranny does not downshift on it's own in drive but otherwise upshifts fine and shifts through the other gear selections as normal. Are you looking to swap a manual tranny in, or are you planning on rebuilding your tranny/t-case? If so, buying another set as a set to rebuild is a good way to save downtime of your own vehicle.<P>Shawn F.<BR>toyota_t100@hotmail.com<BR> <A HREF="http://www.geocities.com/toyotashawn/Toyhome.html" TARGET=_blank>www.geocities.com/toyotashawn/Toyhome.html</A> </B><HR></BLOCKQUOTE><P>I acutally have another tranny I am putting in. I have an A340E(Supra, SC300, LS400, and a few more) At first I will go with a toyota gear driven t-case, but if that won't hold up, I will have to find a stronger t-case. I am not doing this until this early next year sometime, so I am just looking for a work around until then. Maybe I will just have to go the winter without.<P>Thanks<BR><P>------------------<BR> <A HREF="http://4x4.4t.com" TARGET=_blank>http://4x4.4t.com</A>

<BLOCKQUOTE><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><HR>Originally posted by SuperRunner:<BR><B> I acutally have another tranny I am putting in. I have an A340E(Supra, SC300, LS400, and a few more) At first I will go with a toyota gear driven t-case, but if that won't hold up, I will have to find a stronger t-case. I am not doing this until this early next year sometime, so I am just looking for a work around until then. Maybe I will just have to go the winter without.<P>Thanks<P><BR></B><HR></BLOCKQUOTE><P>Are you sure that you want/can put a x-fer behind the "E" trans?<P>When I was researching the Toy AT's for my AT/Crawler project, I found the A340F to be the "other" 4x4 AT toyota used. As you know, the A340E is two-wheel drive. From what I have seen of the A340H and A340F side by side, there are VERY big differences. I don't remember them all off the top of my head, but I know the parking pawl(lock) on the A340H prevented using a manual t-case behind it. I would bet the A340E would have the same type since it is not designed to have an x-fer behind it.<P>Also, the A340E is designed for lighter duty use even though it is based on the same main AT case. The A340F, on the other hand, is the AT that is used behind the Tundra V8 4x4.<P>Dang-it SuperRunner, now you have curiosity all-fired up <BR>I'm gonna have to go research it!<P>In any event, the factory AT manuals were priceless for me when I did my swap. I wouldn't do another without them.<P>My .02<BR>Phil<P>------------------<BR> <A HREF="http://pjohnson.netgate.net" TARGET=_blank>http://pjohnson.netgate.net</A>

<BLOCKQUOTE><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><HR>Originally posted by PJohnson:<BR><B> Are you sure that you want/can put a x-fer behind the "E" trans?<P>When I was researching the Toy AT's for my AT/Crawler project, I found the A340F to be the "other" 4x4 AT toyota used. As you know, the A340E is two-wheel drive. From what I have seen of the A340H and A340F side by side, there are VERY big differences. I don't remember them all off the top of my head, but I know the parking pawl(lock) on the A340H prevented using a manual t-case behind it. I would bet the A340E would have the same type since it is not designed to have an x-fer behind it.<P>Also, the A340E is designed for lighter duty use even though it is based on the same main AT case. The A340F, on the other hand, is the AT that is used behind the Tundra V8 4x4.<P>Dang-it SuperRunner, now you have curiosity all-fired up <BR>I'm gonna have to go research it!<P>In any event, the factory AT manuals were priceless for me when I did my swap. I wouldn't do another without them.<P>My .02<BR>Phil<BR></B><HR></BLOCKQUOTE><P>I spoke with Marlin awhile back, in fact I talked to him today too. He said that the tailhousing off the 93 to 95 T100 might work. Pjohnson, you have an application guide you can look at to see what went in the T100. Anway, I am using the A340E out of a 94 Supra Turbo, definatly can hold up to the power. Although I am a little concerned about the T-case holding up to 500+hp.<P><BR><P>------------------<BR> <A HREF="http://4x4.4t.com" TARGET=_blank>http://4x4.4t.com</A>

<BLOCKQUOTE><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><HR>Originally posted by SuperRunner:<BR><B> I spoke with Marlin awhile back, in fact I talked to him today too. He said that the tailhousing off the 93 to 95 T100 might work. Pjohnson, you have an application guide you can look at to see what went in the T100. Anway, I am using the A340E out of a 94 Supra Turbo, definatly can hold up to the power. Although I am a little concerned about the T-case holding up to 500+hp.<P></B><HR></BLOCKQUOTE><P>Hmmmm.....You will definitely need a tailhousing. You could probably buy a new one for 98+ 4Runner(same as my A340F) and then use Marlin's adapter. Marlin and I looked up the cost once(I think) and it was surprisingly low. The speed sensor would have to be swapped from your A340H. Marlin and I did that. It was the trickiest part of the swap.<P>Maybe the only real issue is the parking pawl. It was definitely different.<P>What's this 500+HP???? Are planning a Chevy BB or something? IMHO it will be way more than you'll ever need or use (but high in the coolness rating).<P>If you're that concerned about the Toy X-fer holding up, I would reconsider the trans entirely and look at a built 700R4/NP205 combo. Especially if you're going to a Chevy motor.<P>Phil<P>------------------<BR> <A HREF="http://pjohnson.netgate.net" TARGET=_blank>http://pjohnson.netgate.net</A>

<BLOCKQUOTE><font size="1" face="Verdana, Tahoma, Arial, Helv, Helvetica, Sans">quote:</font><HR>Originally posted by PJohnson:<BR><B> Hmmmm.....You will definitely need a tailhousing. You could probably buy a new one for 98+ 4Runner(same as my A340F) and then use Marlin's adapter. Marlin and I looked up the cost once(I think) and it was surprisingly low. The speed sensor would have to be swapped from your A340H. Marlin and I did that. It was the trickiest part of the swap.<P>Maybe the only real issue is the parking pawl. It was definitely different.<P>What's this 500+HP???? Are planning a Chevy BB or something? IMHO it will be way more than you'll ever need or use (but high in the coolness rating).<P>If you're that concerned about the Toy X-fer holding up, I would reconsider the trans entirely and look at a built 700R4/NP205 combo. Especially if you're going to a Chevy motor.<P>Phil<BR></B><HR></BLOCKQUOTE><P>I would never put a BB, or a SB for that matter. To much power through the entire range, and you can't really control it. Even with 300hp from a v8, you will break things. That is why I am using a 7MGTE. On the trail, I turn the boost way down, and with the gearing way low, I will never spool. With that in mind, rockcrawling, I will be lucky to hit 180hp. The 500+hp will only be used if getting stuck in mud sand or snow, and pulling on the highway. So, I am not doing it just for the coolness factor, it will be very functional. I just put a 7MGTE in an 85 Supra, very easy. Took 3 days. I am in process of building two 7MGTE's right now. A friend of mine has a NP205 that I was thinking about buying from him. How difficult would that be to bolt up the the A340E?<BR><P>------------------<BR> <A HREF="http://4x4.4t.com" TARGET=_blank>http://4x4.4t.com</A>