Auto Modifications
- Thread starter JB91389
- Start date
Why would you spend money on the auto, if you're going to do the manual swap? Auto's are pretty expensive to rebuild, especially if you're wanting to make it a little stronger. I checked into rebuilding my auto, and decided to just swap it out for a five speed. Good luck with yours.
Yea...just get all the stuff for the 5 speed swap, then go out and beat the hell outa the auto till it breaks.:biglaugh:
you can shim up the accumulators cheaply and turn the line pressure up... do a search its been cross posted here as well as a huge thread on supraforums
Yep, I agree with Allan. Also add a tranny fluid cooler. Get one rated at 20,000+ lbs GVW. You can find one on ebay for less then $50. Don't skip on the most forgoten, flush the tranny fluid completley & replace with Toyota type 4 auto tranny fluid. The fluid flush & cooler alone should keep ya safe to about 350 RWHP on a healthy tranny.
its not recommended to flush an auto transmission if it hasnt been flushed at decent intervals already so be careful with that.
:nono: Another thread about leaving Auto for 5 Speeds. :nono:
Well...It's nice to see people like Steve N and Allan that understand that with the proper procedures and maintenance, the A340E is capable of doing some serious damage...to other cars, that is.
After flushing my system and using new fluid, then getting the Tranny cooler, 4 long months have passed since I put this transmission in my car and it's been through a lot of 1/4 mile runs, Interstate/Highway runs and it's daily driven. No signs of slipping or failure yet. I can honestly say that I LOVE my Transmission.
Well...It's nice to see people like Steve N and Allan that understand that with the proper procedures and maintenance, the A340E is capable of doing some serious damage...to other cars, that is.
After flushing my system and using new fluid, then getting the Tranny cooler, 4 long months have passed since I put this transmission in my car and it's been through a lot of 1/4 mile runs, Interstate/Highway runs and it's daily driven. No signs of slipping or failure yet.
I can honestly say that I LOVE my Transmission. I used to work at an oil change place, and we also did transmission service. My boss would not change the fluid in a car that hadn't had it changed in over 40,000 miles. He said it would mess it up. I don't know how it does it, but he turned down a lot of money by not doing them, so he must have known something.Allan_MA70 said:
I went with the five speed swap, cause my tranny started slipping real bad at only 320 rwhp. I took care of my car too. I changed the fluid and filter, and put new seals in while I had it down, but it just couldn't handle the raw unadulterated power....................JK............but it did start slipping. Hopefully you'll have better luck than I did. I wish you nothing but the best. I enjoyed driving my auto more at the track than I do the five speed............lol
Well I wouldn't power/pressure flush my tranny. I would think it could damage the valve body. What I mean as to flush is to remove all the existing tranny fluid & replace it with 100% New Toyota type 4 or Royal Purpal, Red Line etc. To lazy to type up the correct steps but they can easily be found using search. If you plan on running around 350 rwhp & TQ & have a healthy tranny just add fresh quility fluid as mentioned & a heavy duty tranny/oil cooler & you will be fine. Just remember to properly maintain the tranny by changing the fluid once a yr or 10K miles & filter every 20K miles. Also at each oil change check the lines from the cooler to the tranny for leaks or binds To make sure fluid is flowing well.
Well, as the one to post up the original mod walk through,*also the one with no time to finish my website or anything else for that matter*, have helped people take "broken" transmissions, and bring them back to life. You are mearly increasing line pressure, and shortening the shifts. It will cost you $13 for a tube of FPIG, whatever you spend in fluid choice, and you can use washers you have around... Read this whole writeup as there are alot of good posts, and updated walkthroughs throught the entire contents..
http://supraforums.com/forum/showthread.php?t=267655
http://supraforums.com/forum/showthread.php?t=267655
I would have said experience.Allan_MA70 said:
Trans fluid is a bit different from other lubricants. It also has friction additives to help hold the clutches. But well worn clutches have been wiped clean by new fluid. In other words, people that did not bother with a fluid change the first 150,000 miles, then did a flush and fill were met with a nice trans for a few weeks. Then total failure.
For the record, Toyota type 4 is not recomended. Dexron II or III is the required fluid. III is an upgrade of II. Synthetics are fine.
Nick M said:
By the book yes, but Type 4 viscosity is not too far diffrent then the Dexrons, so a complete flush(i.e. rebuild) and refill with Type for is better, as Type 4 resists break down of even the best of synthetic Dex.
Since this is already a thread on auto transmissions, hopefully I can sneak in and ask a quick question.
Is it normal for the a340e to 'pause' when accelerating from a stop? For example, when I pulled out of the car park this morning I eased on the accelerator and the revs increased but the car didn't move.
Felt like the transmission just didn't engage for a few seconds, and then suddenly it engages with a jerk.
If this is normal for the transmission, is there anything I can do to make it wake up quicker?
Is it normal for the a340e to 'pause' when accelerating from a stop? For example, when I pulled out of the car park this morning I eased on the accelerator and the revs increased but the car didn't move.
Felt like the transmission just didn't engage for a few seconds, and then suddenly it engages with a jerk.
If this is normal for the transmission, is there anything I can do to make it wake up quicker?
Nope.. Not normal at all. Check fluid level. If that hasn't been changed do so along with filter.
Well, I read your thread on SF about a year ago. So I know you aren't full of shit. And I think you have sat through a bunch of drivetrain classes also.That being said, the position at Toyota is that the fluid is not interchangable. That is what we were told. But this position is more towards new transmissions, and not to use Dexron in them.Raven97990 said:
So if you have good evidence of it not hurting the older A340E, like you have had it for a year with many miles and it is alive, then I will believe your position.
Nick-
Toyota Type 4 & Dexron aren't interchangable. However while Type 4 can be used in older a340's like ours (complete flush & Fill) Dexron can not be used in the new (2003+) trannies because it lacks the friction modifiers only found in Toyota Type 4. There are MK3 auto owners other then myself using Type 4 & it has been working well. I have had it in since Feb. 05. on my daily driver & put about 13K miles on her. Dean Marcum, A well respected MK3 owner in SoCal has been using it quit sucessfully for 2+years. He is the one that originaly told me about it.
Toyota Type 4 & Dexron aren't interchangable. However while Type 4 can be used in older a340's like ours (complete flush & Fill) Dexron can not be used in the new (2003+) trannies because it lacks the friction modifiers only found in Toyota Type 4. There are MK3 auto owners other then myself using Type 4 & it has been working well. I have had it in since Feb. 05. on my daily driver & put about 13K miles on her. Dean Marcum, A well respected MK3 owner in SoCal has been using it quit sucessfully for 2+years. He is the one that originaly told me about it.
Steve_N said:
Fluid has only recently been changed but the problem was there both before and after the change. I have not yet changed the filter.
Come to think of it, there's another issue with my tranny: on the first drive after the car's been sitting for hours (8+), the car drives along fine but there's a sort of "thud" when I brake, as the tranny changes down a gear. It definately doesn't feel normal.
I'm running a synthetic dexron III fluid. Stock tranny, stock driveshaft.