IPT Valve Body - My Impressions 3 months later.

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yoda-g3

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I just though I'd share my impressions with you guys.

I know that as far as modified valve bodies go, there aren't a whole lot of options out there. (At least from what I have found when searching.) For the 4Runner / Taco crowd its usually Level 10 or IPT, and the Cruiser crowd usually goes for the Aussy route. (Forgot the name of the company.)


Just to give a little background, I have a S/C'd 4Runner that used to tow my 40 around quite a bit. I had IPT rework that VB two years ago and was VERY impressed on the results. I noticed much cooler tranny temps as well as very nice, crisp shifts. After it was all said and done I had about $800 into it. (Topped off with Amsoil) If I had to go back, I probably would have done that before any other mod. The whole driving experience is so much more enjoyable without those slushy shifts on and off road.


When I purchased my 80, I immediately could tell that the tranny was working WAY to hard with the turbo being tuned to over 400 ft/lbs torque to the wheels. When running at WOT, or towing 4000lbs of boat, the shifts were painfully slow. I often cought myself imagning the clutch discs catching on fire while shifting into second. Needless to say I put a new VB at the top of the list. After doing a little lurking around the forums I found that the only real familiar company out there doing VB's for 80's was based in Australia, but I decided to give IPT a crack at it first since I was so happy with them last time. (Just to note they didn't have my tranny code advertised on their site, but were very confident when I called to inquire about it.)

They were very helpfull over the phone, and seemed very meticulous when I described the driving environment, horsepower requirements, and shift firmness I wanted. The end result has been AMAZING. I don't have temps or economy numbers to give a real detailed side by side comparison, but I can tell you that now it shifts like it should've from the factory. I've done a decent amount of towing and some moderate wheeling and am very surprised how well it responds.

The cost runs about $550 for the actual modification, add shipping each way, and fluid cost. It is important to note that they actually modify your personal VB, there is no core / advance shipment method. So your rig is out of commision while it is being done. For my 4runner I paid $100 overnight each way so I was only down for a couple days, but this time I was feeling cheap so it was down for a week.

its a pretty easy job to un-install and re-install yourself, just EXTREMELY messy. I'm really anal about stuff and it took me about 1.5 hrs out, 2hrs in (most of which was pouring fluid.)

Bottom line, if you have ANY type of forced induction this is a MUST. Or if you just want your brick on wheels to shift like a sports car, that too is a must. :D

If any one has any questions feel free to ask!
 
Thanks for the info, this has been bothering me since I first installed a s/c and had come from all standard tranny trucks to the 80 being my first auto. I soon discovered why folks from AUS with 5-speeds and turbo's called the auto a "slushbox". With my truck s/c'd and subsequently turbo'd I've had instances where the "AT" temp warning light on the dash has come on from extended "rallying" in soft snow or sand. I'm probably due for a more thorough rebuild on the tranny than just having the VB rebuilt but this still looks like a must do. :cheers:
 
yoda,
+2 on a nice write-up. After doing some searching here I feel my 91 could benefit from a VB rebuild. It's good to hear feedback before spending that much change.
 
Ill be sending my 4runners VB pretty soon myself to John at IPT. I hear it also shaves more then a second of your quarter mile time; that is not a concern for me at all on my trucks BUT its nice to know it is that drastic of a change..
 
So about $750 all said and done after shipping cost? Could be my next mod before I start building up a 2FE. I know there is a fine line between crisp and harsh, does this cross it? Does the rig feel like it has more power?
 
alkaline747trio said:
So about $750 all said and done after shipping cost? Could be my next mod before I start building up a 2FE. I know there is a fine line between crisp and harsh, does this cross it? Does the rig feel like it has more power?

I have HEARD that it can feel like more power because its a more constant pull and less of the non engaging shift feeling.

BUT you can control the shifting, IPT is very capable and I know with the 4runner they have at least 3 main settings most people go with MED but they can make it so harsh taht it feels like a race car..
 
That's the concept I was asking about, it stays in the power band better, or in theory does. I'd like to know the actual seat of the pants experience.

I don't mind the harshness, but I know the people who ride with me wouldn't enjoy it.
 
alkaline747trio said:
So about $750 all said and done after shipping cost? Could be my next mod before I start building up a 2FE. I know there is a fine line between crisp and harsh, does this cross it? Does the rig feel like it has more power?

My biggest concern was the crisp / harsh knife edge. The way mine were both done were a perfect compromise. The big thing I've noticed is that the 'firmness' of the shift seems to be directly proportional to how much throttle you give it. (Dictated by fluid pressure I'm sure.) So if I'm driving conservatively, or my wife is driving you just feel a pleasant 'thunk' as it shifts, no head jerks or whiplash. But when I have her wide open it definitely is more prominent, but still not distracting. The only situations that I've found it to be a little harsh is sometimes when crawling in Low Range, the shifts between 1st and 2nd get you attention. I kind of like it though because you can really tell you're in the gear you want and not burning clutch discs in those high torque situations.

I think it definitely felt like more power because of how long the shifts used to take, you spend more time pulling through the power band, instead of wasting 500 rpms for it to finally kick in all the way.
 
alkaline747trio said:
.... I don't mind the harshness, but I know the people who ride with me wouldn't enjoy it.


Probably covered this above, but with what I have had done this was definitely NOT an issue. Even when I romp on it on the street its very well mannered. You could probably request to have exactly what I did, just tell them it should be the same as waht Shane Fuller in Spokane, WA had done.


Heck if any of you is ever in the area I'd let you take either of them for a spin. May cost you though. :beer:
 
That is a really good point Yoda, it is absolutely dependant on your driving habits, they dont jerry rig your VB like a lot of tranny shops do by just upping the oil pressure, they actually change the spring ratios and use special proportional or double rate springs. IE the springs are not linearly proportional so as more pressure is applied it's charachteristics change depending on your driving habits.
 
JimmyK said:
That is a really good point Yoda, it is absolutely dependant on your driving habits, they dont jerry rig your VB like a lot of tranny shops do by just upping the oil pressure, they actually change the spring ratios and use special proportional or double rate springs. IE the springs are not linearly proportional so as more pressure is applied it's charachteristics change depending on your driving habits.

That makes sense as to the results I've experienced. I don't know what they do exactly, I assumed they might actually machine out some of the passageways as well, becasue I do know that they have to open the VB up all the way to work their magic. Either way this is definitely the real deal, not the $99 drop in kit you get at your local 'Tranny Shack' that is a 'universal' aplication. :cheers:
 
alkaline747trio said:
So this requires the entire slushbox be shipped out?

Nope, just the VB. follow this link and look under the Valve Body section. there is a pic of what we're talking about. I think there are some instructions posted on the site as well for removal and installation.

Link to site
 
yoda-g3 said:
For the 4Runner / Taco crowd its usually Level 10 or IPT, and the Cruiser crowd usually goes for the Aussy route. (Forgot the name of the company.)

The Oz company is Wholesale Automatic Transmissions; here's their Valve Body

Will the IPT VB lock-up the TC in 3'rd?

-Steve
 
wussyPup said:
The Oz company is Wholesale Automatic Transmissions; here's their Valve Body

Will the IPT VB lock-up the TC in 3'rd?

-Steve


That I'm not sure about, but a really good question. I'll ask them when I call them up next week with another question I have. I like how that site shows you exactly what they do to it, that's pretty cool. Any idea how much it costs from them? I didn't see any pricing info. Also it looks like that specific application only goes up to late '92, or do they also have the 3rd and 4th lockup for the 442 as well? (It would figure something potentially etter comes out 1 month after I get mine.... :doh: )
 
jklubens said:
what were the tranny temps before and after?


Unfortunately I didn't have a guage on before, and I still don't have this one hooked up. I do know that on my 4Runner its pretty rare to even hit 120 on an average day. Maybe 140ish when we're in the high 90's and being heavy footed. Even when towing my 40, quad, and camping gear during the summer 90's I would average 150-165 on pretty steep grades. (Higher if I forget to turn OD off). I'm running Amsoil in that rig as well as a pretty hefty cooler.
 
yoda-g3 said:
I like how that site shows you exactly what they do to it, that's pretty cool. Any idea how much it costs from them? I didn't see any pricing info. Also it looks like that specific application only goes up to late '92, or do they also have the 3rd and 4th lockup for the 442 as well?

They do VBs for the A440F and A442F, and I heard that the A343F is "in the works". You should contact Rodney directly for pricing, but IIRC the A442F valve body exchange price was around $800 AUS, plus shipping both ways; you send them your old VB after the swap.

I have this http://www.automatictransmission.com.au/extreme_a442f.asp in a container at sea now; the ship is scheduled to arrive on the 1st.
 

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