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  #31  
Old April 16th, 2011, 23:42
child9 child9 is offline
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Re: Aw4 power handling/ reliablity and performance upgrades.

I was reading back over this since I'm in the middle of the "soft overhaul" of an AW4. As I understand, in the A340s the clutches are NOT the weakest point. In fact, they are not even weak. Raybestos "blues" are not necessary. The regular raybestos yellows are what is used in the Boost Logic built autos and they hold plenty of power. see http://www.boostlogic.com/?paged=2 The sprags are what breaks 9 out of ten times... and I just put the same sprags in this AW4 today that are in every BL trans... they look IDENTICAL to the sprags I took out of the AW4.
Every friction disk I removed from the stock AW4 was really dark grey. I replaced them with raybestos yellows. So far the stock frictions were also showing barely any signs of wear. I've done the forward and overdrive clutch packs so far.

I am really curious to know of any experiences anyone reading this has had with actual AW4 transmission failure and what it actually was that failed.

So far, between working with the guy who builds the BL trannys and my personally working on this AW4, it is looking like swapping the frictions out, replacing orings and seals (while you're in there) and proper valve body setup are the only keys to balancing both performance AND longevity in our automatic Jeeps. I am sure a $4000 transmission is simply not necessary, and I aim to prove that.

Any of you Jeepspeed guys be willing to test a trans? I should have everything completed in a month or two.
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  #32  
Old April 17th, 2011, 00:38
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casual casual is offline
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Re: Aw4 power handling/ reliablity and performance upgrades.

http://my.is/forums/f114/info-leadin...levels-412569/

Here you go my man. Your more than welcome to hit up Jeff. He did my trans when I had a boosted IS3. Hows 600whp through the auto trans sound?
Yes, yes she was a beast. But he makes/builds custom 3rd sprags & modifies the valvebody so your not smacking the rev limiter all the time. At least in IS/Gs's. People with 350-450whp would smack the rev limiter in 1-3rd gear with the "ebay valvebody upgrade". I wouldn't hit it at all unless my trans was far too hot & I was running 600whp lol. That says something about his work! This guy know his sh*t its well worth the read. Many many people with boosted is300's ask who's built my trans, how aren't you popping the limiter. Jeff's my answer every time. Hes a great guy, just kinda hard to get a hold of at first. Once you have his number though your golden! He will always call back/ txt back & doesn't mind shooting the sh*t & spreading his info!

And to be specific he built my trans & modified my valvebody until I wasn't smacking the limiter. Just floor it & go! But ya he built my trans 1 time & it never broke. After 2 years of 450whp daily & quite a few highway/drag strip runs @ 603whp it never made a hiccup! Just regular 30k fluid changes.
The guys so stand up, he redid my valvebody until it was just right. I'm not a fan of bouncing of the limiter & he redid it at least 4 times to get it just right for me. All at the cost of $2500 for a flat fee. This included shipping! I got a badass built trans that didn't jump the limiter, even at 600whp and met a very knowledgeable person in the process.
Moe @ SRT wanted quite a bit over $3000 to build my trans & that would include his "universal hardened" 3rd gear sprag & universal valvebody...and there wasn't a warranty if I went over 500whp. Haha he knew me all to well so I went with Jeff. Had Larry @ Sound Performance build my car made a max of 603whp. I sent Moe the dyno sheet & never looked back!

Last edited by casual; April 17th, 2011 at 00:46.
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  #33  
Old April 17th, 2011, 00:55
child9 child9 is offline
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Re: Aw4 power handling/ reliablity and performance upgrades.

I'm good on the valve body but I will be trying to contact him regarding the sprags for sure. Good lookin' out! Thank you casual!
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  #34  
Old April 17th, 2011, 01:03
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Re: Aw4 power handling/ reliablity and performance upgrades.

No problem. Thats what we are here for.
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  #35  
Old September 5th, 2011, 06:04
dpwong dpwong is offline
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Re: Aw4 power handling/ reliablity and performance upgrades.

AW4 Transmission Pan, PML Project Number 11076

PML has received a few requests from Jeep Cherokee and Wrangler owners for an aftermarket AW4 transmission pan. Not all Cherokee and Wranglers have this transmission. Some Toyota vehicles may have this transmission. It may also be known as the A340 transmission.

This project is on hold for several reasons. Vehicles lack clearance and exhaust and frame interfer with installation and fitment an aftermarket pan. The stock pan has a dipstick receiver, which makes designing and manufacturing a sand cast aluminum pan complicated and expensive. A pan with a bit more capacity would run at least $250 in the cast finish and a dipstick receiver would add about $80. To justify this project, we would need 50 people ready to buy and so far there have been seven requests. Thanks to Walter provided details on his stock pan.

If you have this transmission, let us know if you are interested. Email yourcovers@pmli.com or call (310) 671-4345.
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  #36  
Old September 5th, 2011, 13:02
NorCalChris NorCalChris is offline
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Re: Aw4 power handling/ reliablity and performance upgrades.

Quote:
Originally Posted by dpwong View Post
AW4 Transmission Pan, PML Project Number 11076

PML has received a few requests from Jeep Cherokee and Wrangler owners for an aftermarket AW4 transmission pan. Not all Cherokee and Wranglers have this transmission. Some Toyota vehicles may have this transmission. It may also be known as the A340 transmission.

This project is on hold for several reasons. Vehicles lack clearance and exhaust and frame interfer with installation and fitment an aftermarket pan. The stock pan has a dipstick receiver, which makes designing and manufacturing a sand cast aluminum pan complicated and expensive. A pan with a bit more capacity would run at least $250 in the cast finish and a dipstick receiver would add about $80. To justify this project, we would need 50 people ready to buy and so far there have been seven requests. Thanks to Walter provided details on his stock pan.

If you have this transmission, let us know if you are interested. Email yourcovers@pmli.com or call (310) 671-4345.
How much MORE capacity would be added? I understand this project is in the early stages, but It was to my understanding certain 4runner pans were "larger in capacity" then the pan used in the Jeep Cherokee. I do believe this is a great idea, I just wonder if the cost is worth it?
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  #37  
Old September 6th, 2011, 12:22
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GrimmJeeper GrimmJeeper is offline
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Re: Aw4 power handling/ reliablity and performance upgrades.

what about a stamped steel pan similar to the stock design but deeper? still sounds like a rock magnet to me, i'd go with an external reservoir and a big cooler over a pan that hung lower if the extra capacity would make that much of a difference.
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  #38  
Old September 12th, 2011, 07:11
O-Gauge Steamer O-Gauge Steamer is offline
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Re: Aw4 power handling/ reliablity and performance upgrades.

The tooling costs invloved for a stamping would be astronomical. We would need hundreds of pre-paid orders to justify the expense.

Here is what Marcus (Gojeep) did. A simple solution. Some street only pans have tubes running through the pan with the ends open to allow air flow. Increases cooling, but would be a mus trap for tose of us that run off the road... You can see examples of this idea on either Summit Racing or Jegs web site.

http://go.jeep-xj.info/HowtoAutoDeepPan.htm

I moved my Aux Transmission cooler out from in front of the radiator and onto the top of the front skid. Added a 6" puller fan to get the air moving along with a 185F thermoswitch to control the fan. My engine temps dropped a good 5F after removing the blockage the radiator.
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  #39  
Old September 19th, 2011, 06:45
dpwong dpwong is offline
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Talking Re: Aw4 power handling/ reliablity and performance upgrades.

Hi,
I am interested in getting the HD Sprags . How do I get them??
thanks
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  #40  
Old September 21st, 2011, 11:22
child9 child9 is offline
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Re: Aw4 power handling/ reliablity and performance upgrades.

You can't. The sprags I was looking at are for the a640e I think.
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  #41  
Old October 20th, 2011, 05:14
dpwong dpwong is offline
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Re: Aw4 power handling/ reliablity and performance upgrades.

hi child9,
i thought you are on A340E tranny. Any hd sprags on the A340E ?
regards
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  #42  
Old October 22nd, 2011, 23:47
child9 child9 is offline
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Re: Aw4 power handling/ reliablity and performance upgrades.

I am. None that I'm aware of.
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  #43  
Old November 19th, 2011, 09:03
NorCalChris NorCalChris is offline
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Re: Aw4 power handling/ reliablity and performance upgrades.

Quote:
Originally Posted by child9 View Post
I am. None that I'm aware of.
You mentioned that the sprags you used from BL look identical to the aw4 sprags?
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  #44  
Old November 20th, 2011, 23:21
child9 child9 is offline
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Re: Aw4 power handling/ reliablity and performance upgrades.

The replacement sprags I purchased for the A340e are the same part number as the ones I bought for the AW4. In fact, only one of the clutch packs is different. There is no HD sprag for either, which is fine, cause they aren't necessary. Everything I've experienced indicates that proper valve body modifications are all that is really needed. Blue frictions are also a waste of money in this application. Regular raybestos yellows and normal sprags are used in the same transmissions that are running 8.8 quarters in a 3100 lb Supra. I didn't do any of this with BL either, since they don't actually do anything. I went to the man they send the transmissions to. This same guy made my hybrid trans. He and I agreed to trace out the AW4 valve body and map out the adjustments, but we've both been super busy and haven't done that yet. BL charges what they do for a soft rebuild, new OEM sprags, billet piston, and valve body mods. Turns out it's not as magical as some would have us believe. The AW4/A340e is just a damn good transmission, and a few adjustments make it better.
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  #45  
Old November 21st, 2011, 05:41
xj^REMY xj^REMY is offline
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Re: Aw4 power handling/ reliablity and performance upgrades.

child9, thanks for the good tech info & the documented work...

u should update, ur "AW4 rebuild/upgrade build thread"
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