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Old October 17th, 2012, 11:01 AM   #21
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Originally Posted by whiterhino View Post
As an example we are at R&V and pull out of a trail and are going to run 1/8 mile down to another trail. As the others are buzzing along at 25 mph (or whatever it is) I'm either A)wringing out my rig @ a high rpm, B) falling behind or C) shifting into high range and then back into low range again. Or, wer're at the the dunes playing follow the leader in the tight & twisties. We decide to buzz out to the beach. It's only a couple hundred yards but it I end up shifting into high range. I like to run low range on the steep hills at the dunes from an idle or slight roll. Every time I crest a hill I'm limited on speed to the next hill.

Many trails I have run have flat smooth spots where we will momentarily get up to a speed where I would like to have a 4th gear. It's not a big enough deal to dive into a trans swap but if I were starting fresh it's something I would at least put on the list for consideration.
Makes sence. What would you do for a trans if you were going to swap? 4l60, 4l80, 700r4?
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Old October 17th, 2012, 12:33 PM   #22
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I don't have a clue. I've done zero research on it.

That said, I'd love the new 6 speed that's in my 2011 GMC.
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Old October 17th, 2012, 12:43 PM   #23
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I don't have a clue. I've done zero research on it.

That said, I'd love the new 6 speed that's in my 2011 GMC.
way to be helpful


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Old October 17th, 2012, 01:45 PM   #24
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I too like the od in my aw4. I find myself using it a lot more than I thought I would. Just as Jim said, I use it while running around on the flat trails or two tracks at speeds just slow enough that I don't have to shift to high range.
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Old October 17th, 2012, 02:04 PM   #25
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Is my 4l60 going to be strong enough? I don't mind spending cash on the adapter I just don't want to build my buggy around that trans and end up changing it in the future.
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Old October 17th, 2012, 03:12 PM   #26
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700r4 with a 205.manual valvebody. my buddy has this combo in his jeep with a 5.3 and it hauls ass! remember you loose almost 60 hp turning a 4l80 and they are big and heavy. you also have to program for the 4l80. 700 r4 or a turbo 400 is a lot easier swap and way cheaper.
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Old October 17th, 2012, 03:37 PM   #27
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The 4l60 can be built to hold 600hp. I am running a stock 4l60. Although I don't get to use it allot, I run it hard when I do, and so far, so good.

It is behind a 5.3 with a little tuning and some pretty aggressive tranny tuning (shifts hard, no torque management)...
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Old October 18th, 2012, 12:38 PM   #28
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700r4 with a 205.manual valvebody. my buddy has this combo in his jeep with a 5.3 and it hauls ass! remember you loose almost 60 hp turning a 4l80 and they are big and heavy. you also have to program for the 4l80. 700 r4 or a turbo 400 is a lot easier swap and way cheaper.
I am starting to lean towards the th400 for the fact they are cheap and strong. I would much rather deal with a kickdown than a tv also. I also like the cheap adapter options. As tab and wr said od would be nice but I don't know if it worth the added hassle and cost. A th400 is super cheap and easy to rebuild also.
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Old October 18th, 2012, 04:56 PM   #29
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If you go the 4L80e route, maybe swap to a better converter. The stock converter is one of the culprits to the heavy rotating mass and HP loss.
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Old October 18th, 2012, 05:01 PM   #30
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Quote:
Originally Posted by chadcooper55 View Post
I am starting to lean towards the th400 for the fact they are cheap and strong. I would much rather deal with a kickdown than a tv also. I also like the cheap adapter options. As tab and wr said od would be nice but I don't know if it worth the added hassle and cost. A th400 is super cheap and easy to rebuild also.
Yeah, the TH400 is just an electrical switch to get your kickdown, no cable to mess with like the TH350.

Here's an install

http://www.highperformancepontiac.co...witch_install/
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Old October 30th, 2012, 06:08 PM   #31
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Quote:
Originally Posted by liv2mx View Post
....remember you loose almost 60 hp turning a 4l80 and they are big and heavy. you also have to program for the 4l80. 700 r4 or a turbo 400 is a lot easier swap and way cheaper.
60hp compared to what? And if you're THAT worried about it, you can buy low drag planetaries and also get a lower first gear while you're at it.

You will have to adjust the calibration using any electronic trans, even the stock trans since shift points and HP will be different from the stock application. In fact, I can't think of a single engine or trans that I would run without SOME sort of "tune". Even if you're running a trans that doesn't need electronic control you will still need to alter the engine calibration to run properly.

A TH400 is a pretty straight forward choice but you will still need to make adjustments/changes to the governor to get the shift points higher than they are for the stock engines they came behind. A FMVB is a nice way around this but that isn't exactly an automatic trans anymore either. I would opt for OD and a torque converter lockup.

With a 5.3L I don't think you'll be able to hurt a 4L60 unless its stock and has a crappy calibration in it. If you're planning on going to a 6.0L or the HP output those are capable of then a 4L80 would be a better choice. And this topic is exactly why I went with the 6L80. 4:1 first and a .66:1 OD.
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Old November 6th, 2012, 05:04 AM   #32
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I am gonna run a th400-Ford np205 behind the 5.3 in my wrangler, I picked up the adapter from Offroad designs ($225) its pretty easy to swap a Chevy Input into the ford case and you could get one of those for 100 ish.

I did alot of reading on the adapting the two together and I like how this adapter is, It does NOT clock the t case completely flat. You could get it flat with a modified 208 adapter. From what Ive read you run into problems with the drive shaft hitting the trans pan when clocked flat.

I could get you an overall length (th400-adapter-Np205) and how far the t case is below the trans pan measurements if you like
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Old November 6th, 2012, 06:23 AM   #33
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Quote:
Originally Posted by whiterhino View Post
As an example we are at R&V and pull out of a trail and are going to run 1/8 mile down to another trail. As the others are buzzing along at 25 mph (or whatever it is) I'm either A)wringing out my rig @ a high rpm, B) falling behind or C) shifting into high range and then back into low range again. Or, wer're at the the dunes playing follow the leader in the tight & twisties. We decide to buzz out to the beach. It's only a couple hundred yards but it I end up shifting into high range. I like to run low range on the steep hills at the dunes from an idle or slight roll. Every time I crest a hill I'm limited on speed to the next hill.

Many trails I have run have flat smooth spots where we will momentarily get up to a speed where I would like to have a 4th gear. It's not a big enough deal to dive into a trans swap but if I were starting fresh it's something I would at least put on the list for consideration.
I have a 5.3 with a 700r4 to a atlas 3.8 in my jeep I use 4 gear. But I do have to shift into high range to keep up a lot too. Lol
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Old November 6th, 2012, 09:50 AM   #34
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Go th400

http://www.greatlakes4x4.com/showthr...=192605&page=6

Last edited by firehawk; November 6th, 2012 at 10:00 AM.
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