From: "Mick Barson" Date: Tue Jun 24, 2003 6:33 am Subject: RE: [100scool] td 100 Michael Auto's have a taller final drive hence the lower rpm and in theory a better fuel consumption and higher top speed. Manuals get a lower 1st gear for downhill crawling and better engine braking. Manual - Transmission code H151F Gear Ratios - 1st 4.081:1 - 2nd Gear 2.294:1 - 3rd Gear 1.490:1 - 4th Gear 1.000:1 - 5th Gear 0.881:1 Compared to: Auto- Transmission code A750F Gear Ratios - 1st 3.520:1 - 2nd Gear 2.042:1 - 3rd Gear 1.400:1 - 4th Gear 1.000:1 - 5th Gear 0.716:1 Cheers Mick From: "Greg Goulden" Date: Tue Jun 24, 2003 8:52 pm Subject: Re: td 100 --- In 100scool@yahoogroups.com, "Mick Barson" wrote: > Michael Auto's have a taller final drive hence the lower rpm and in > theory a better fuel consumption and higher top speed. Manuals get a > lower 1st gear for downhill crawling and better engine braking. > > > Manual - Transmission code H151F > > > Gear Ratios - 1st 4.081:1 > > > - 2nd Gear 2.294:1 > > > - 3rd Gear 1.490:1 > > > - 4th Gear 1.000:1 > > > - 5th Gear 0.881:1 > > Compared to: > > Auto- Transmission code A750F > > > Gear Ratios - 1st 3.520:1 > > > - 2nd Gear 2.042:1 > > > - 3rd Gear 1.400:1 > > > - 4th Gear 1.000:1 > > > - 5th Gear 0.716:1 > > > Cheers > Mick > Well done Mick, The only thing you left our was the diff ratios. All HDJ100's prior to latest upgrade had 4.1:1 diffs. Since the update with the release of the 5sp A750F auto tranny, all the autos get 3.9:1 diffs, the manuals stay at 4.1:1. Personally, I think a A750F with 4.3:1 diffs (same as V8 manual, but still only 2150rpm @100km/h) would be a nice weapon ;-) Regards, Greg Goulden. 2000 HDJ105 - always thinking. From: Drexx Laggui Date: Sun Aug 24, 2003 10:32 pm Subject: Re: [100scool] UZJ100 auto tranny At 03:12 AM 8/25/2003 +0000, dr_jchow wrote: >Does anyone know what year the 5spd auto was introduced to >replace the 4 spd? (is this the same as in the late 80 series?) >Also, did Toyota beef up the 5spd auto in 2003? I heard rumors >about that. It's the 2003 UZJ-100 had the 5-speed (A750F) auto-tranny. I presume it's a tough tranny, as it has been mated to the turbo- diesel 1HD-FTE engine. I saw some specs about it in here: http://www.brian894x4.com/A750Fspecifications.html Drexx Laggui - TLCA #11841; PMC San Jose, CA, USA http://www.pbase.com/drexx (UZJ-100W; FZJ-80L; HDJ-80L) http://groups.yahoo.com/group/cruiser-stuff/files/cruiser_specs.html From: "Dennis & Linda" Date: Mon Aug 25, 2003 10:04 am Subject: Re: UZJ100 auto tranny --- In 100scool@yahoogroups.com, "dr_jchow" wrote: > I thought the 2000s+ had the 5spd auto already? > > --Jim No, 2003. I have a 2002. The 5 speed, telescoping wheel, and other goodies came out the year after I bought mine (of course - drat). From: "Shotts Family" Date: Mon Aug 25, 2003 8:56 am Subject: RE: [100scool] Re: UZJ100 auto tranny --- In 100scool@yahoogroups.com, "dr_jchow" wrote: > I thought the 2000s+ had the 5spd auto already? > > --Jim Nope. 2003 was the first year for the 5-speed in the LC and LX470, and also now in the other 2004 models w'V8......GX470, Four Runner, etc. From: "Debbie, Declan and Peter Crawley" Date: Tue Aug 26, 2003 4:31 am Subject: Re: [100scool] Re: UZJ100 auto tranny In Oz the 5sp auto was released in the series 2 or 'upgrade' model 100series in September 2002. This is also when they replaced the 4.5litre in line six with the 4.7litre V8 and put the ifs in the petrol, and added a few nice bits like cruise to the TD. Before that the ifs was only in the TD. The only live front end 100 cruiser we have here now is the non-turbo Diesel. Hope this helps Pete 2003 HDJ100 getting more bits and a new windscreen thanks to a suicidal Cockatoo. Coonabarabran NSW Oz To: 100scool@yahoogroups.com From: "extreme_trans" Date: Thu, 12 Feb 2004 21:21:03 -0000 Subject: [100scool] A750F 5 Speed Auto Reply-To: 100scool@yahoogroups.com Does anyone have a source for the exploded view of a A750F Valve Body. I tried every avenue that I can think of so far and i'm starting to think that Toyota never done one that was released in any publication. I can find external views showing solenoids Ect but that it. I'm working on a new Valve Body Recalibration for a 6/2003 4.7 100 series that has been sent down to me from QLD. We have spent the last 3 days testing the Auto, Pressures, Stall Speed, Shift Points Ect and today we start on the modifications to the valve body. An Exploded view would be nice but I might have to speed the extra time and draw up my own. Regards Rodney To: 100scool@yahoogroups.com From: "extreme_trans" Date: Fri, 13 Feb 2004 10:55:41 -0000 Subject: [100scool] Re: A750F 5 Speed Auto Reply-To: 100scool@yahoogroups.com Next week when we are done I will bring home all of my notes and do a write up. I will even add some photos if i can get Greg to show where and how to put them in. I have found out a few things already that I have found interesting. The first thing I found is that Toyota don't have a pan gasket or filter seal in Australia although I manage to get them from Lexus ( I think I wiped there entire stock out in one hit ) I think I had better give them 2-3 weeks warning next time I want to order 2 pan gaskets at once hahaha. I have also learnt that you can't get valve body gaskets unless I buy the whole valve body, this would also explain the lack of exploded Valve Body pictures because the valve body is now considered one piece unlike in the past you could get any valve separate for the A440 and A442 transmissions. The transmission after market will eventually catch up with all the gaskets I will need but I might have to get a hold of Transtec in the states and find out if they have started to produce and stock the gaskets yet. I also found out that the A750F filter costs over $90 Trade!! Next week I will tackle the performance side of the A750F. Regards Rodney To: 80scool_aus@yahoogroups.com From: All American Imports Date: Tue, 30 Mar 2004 10:46:35 +0200 Subject: [80_aus] FW: AUTOMATIC QUESTION A750 Reply-To: 80scool_aus@yahoogroups.com Anybody any input on this one? Hi all, Just wondering of any member has heard or expirienced function problems with the 5 speed Landcruiser TURBODIESEL automatic. Symptom; Lever in D position,Driving in city traffic after bringing the car at speed and releasing the throttle to cruise, the gearbox doesn't shift to the highest gear and gives you the feeling you are driving with the lever in 3RD. This happens once in 3 - 4000km. It feels like the previous model sticking torqueconvertor. We only recieved the A750 in the turbodiesel for modelyear 2004 while it arrived in 2003 in the V8. I know you guys had this already in 2003 model turbodiesel. I also know of 2 people that had early 2003 models turbodiesel automatics that shifted unexpected back from 5th or 4th to 1st every 4 - 5000km ! It was said the problem was in the electronics and replacing the ECU had done the job. I have no 100% confirmation of this because in Australia its probably the same like overhere, you give advice and ask for feedback to learn from it and you hear nothing again till you decide to ask them what the problem was. Very interested to recieve any information on this subject. With best regards, Maarten Verschure To: 80scool_aus@yahoogroups.com From: "extreme_trans" Date: Tue, 30 Mar 2004 11:19:46 -0000 Subject: [80_aus] Re: FW: AUTOMATIC QUESTION A750 Reply-To: 80scool_aus@yahoogroups.com -- In 80scool_aus@yahoogroups.com, All American Imports wrote: > Anybody any input on this one? > > Hi all, > > Just wondering of any member has heard or expirienced function problems > with the 5 speed Landcruiser TURBODIESEL automatic. > > Symptom; Lever in D position,Driving in city traffic after bringing the > car at speed and releasing the throttle to cruise, the gearbox doesn't > shift to the highest gear and gives you the feeling you are driving with > the lever in 3RD. > This happens once in 3 - 4000km. Hi Maarten it's Rodney here from Wholesale Automatics. The fact that in seems to be stuck in 3rd leaves it's self open to a couple of suggestions. First the ECU is directly responsible for the shift changes so the problem isn't within the transmission. So we have worked out that the ECU is causing the transmission to remain in 3rd but is it because it is going into fail safe mode? An inhibitor switch problem that is sending the wrong information to the ECU? Or an ECU problem. Won't be a convertor problem as the convertor has no control over the shift points. When the problem occurs does it stay in 3rd all the time while the shifter is in drive until you turn the car off and on? or does it finally make some sort of gear change? I'm not sure what gear the ECU uses to fail safe normally 3rd but in the case of the 5 speed A750F I would have to look that up tomorrow at work. Regards Rodney To: 80scool_aus@yahoogroups.com From: "extreme_trans" Date: Tue, 18 May 2004 12:57:21 -0000 Subject: [80_aus] Re: AUTOMATIC QUESTION A750 Reply-To: 80scool_aus@yahoogroups.com --- In 80scool_aus@yahoogroups.com, All American Imports wrote: > Hi all, > > Just wondering of any member has heard or expirienced function problems > with the 5 speed Landcruiser TURBODIESEL automatic. > > Symptom; Lever in D position,Driving in city traffic after bringing the > car at speed and releasing the throttle to cruise, the gearbox doesn't > shift to the highest gear and gives you the feeling you are driving with > the lever in 3RD. > This happens once in 3 - 4000km. > > It feels like the previous model sticking torqueconvertor. > > We only recieved the A750 in the turbodiesel for modelyear 2004 while it > arrived in 2003 in the V8. > > I know you guys had this already in 2003 model turbodiesel. > > I also know of 2 people that had early 2003 models turbodiesel > automatics that shifted unexpected back from 5th or 4th to 1st every 4 - > 5000km ! > It was said the problem was in the electronics and replacing the ECU had > done the job. I have no 100% confirmation of this because in Australia > its probably the same like overhere, you give advice and ask for > feedback to learn from it and you hear nothing again till you decide to > ask them what the problem was. > > Very interested to recieve any information on this subject. > > With best regards, > > Maarten Verschure > Sorry for the long delay Maarten but this has taken me a long time to try and sort out but I think I have 2 differant explinations. The first is just a one off and the other is a bit more complitated. 1st/ The A750 Auto stuck in 3rd gear. Doesn't matter if you move the T.bar to D1, D2, D3 or D4. This is normal condition for the first time the T.bar is manualy shifted out of "D" range. The computer goes through a self learning process once the ignition is switched off and on again. The above transmission fault of being stuck in 3rd is rectified. 2/ Isolated field reports have been received advising of an unusual upshift/downshift pattern on Landcruiser 100 series equiped with the A750 5 speed transmission. Subsequent investigations have confirmed that these shift pattern characteristics are infact design features of this transmission. This is due to the introdution of "Road Condition Support Control" which enables the engine & ECT ECU to estimate the road conditions through varios sensors and automatically adopt an optimal shift pattern for the driving conditions. the following is an explanation of this new shift control function. UPHILL DRIVING In a conventional automatic transmission when the vehical is accelerated or decelerated while driving uphill the transmission frequently shifts up or down depending on the conditions. On the new A750 automatic transmission the "Road Condition Support Control" funtion of the ECU assesses the uphill driving conditions through the throttle opening angle, vehical speed etc and restrains the transmission upshifting into 4th or 5th in order to achieve optimal and constant drivingforce. DOWN HILL DRIVING In a conventional transmission, the transmission upshifts quickly into top gear even at low vehicle speeds because the thrttle is almost completely closed, resulting in little or no engine braking assistance. On the A750 automatic transmission the "Road Condition Support Control" function of the ECU automatically downshifts the transmission from 5th to 4th or 3rd gear so that optimal engine braking can be achieved. In addition to the above the "Road Condition Support Control" function also prevents unnecessary transmission shifting when the vehical is driven on winding roads in order to achieve optimal shift control at all times. I do have a image that helps explain this if anyone wants it. E-mail me at rodney@speedcarworld.com.au I know that this is a 100 series topic but the question was asked here! Maybe greg would like to copy or cross link it to the 100 series group? Regards Rodney Wholesale Automatic Transmissions From: szewczyk andrew To: 100scool@yahoogroups.com Subject: [100scool] Landcruiser 100 Series 5 Speed Automatic Date sent: Mon, 24 May 2004 21:35:11 +1000 (EST) Send reply to: 100scool@yahoogroups.com Hi, I've just joined 100scool. I was sent a copy of the email from Maarten Verschure re the query on the A750 automatic transmission which I can relate to. I have an 09/03 build LC100 T/D which has an intermittent issue where if you start hill descent, at 60kph & touch the brake pedal to slow as you gather speed, the engine braking 'cuts in' & the engine speed rises from 1100 rpm to 2250 rpm - being a diesel, very noticeable. I'm definite that it's going from 4th to 2nd. Feels very over the top for what is a negligible downhill gradient. On other descents, you can notice when it drops to 3rd & this is much smother engine braking. Doesn't happen on steep gradients. I have taken it to the Toyota dealer in Sydney who are set up for automatic repairs and maintenance & went out with them for 40 minutes & couldn't to get it to occur. A 250 km round trip. Within 3 km of home, guess what, happened twice. I was given a copy of the Toyota Technical Newsflash which is word for word the same as the reply, 2), from Rodney from Wholesale Auto Transmissions. But I note from this that the wording is from 5th to 4th to 3rd - no mention of 2nd, let alone 1st. The diagram Rodney mentions also shows that 'With Control' the down shift should be 5-4-3-4 5. Note that this Newsflash is dated 23/03/2003. As of 09/03 build, LC100 automatics are a sealed unit. IE a tad different from their predecessors. Would be very interested to know if there are any other LC100 auto owners pre or post 09/03 who have a similar situation. I have now reported this issue to two Toyota dealerships, Toyota Australia & the NRMA Technical Service. The company I use for servicing (Traction 4, Artarmon) have also had this mentioned, albeit from LC100 V8 automatic customers. I've been a Toyota 4WD (80 series & Prado manual transmission) owner since 1993 & think they are an incomparable 4WD, but feel this is a problem that requires further investigation. All replies will be welcome. Cheers Andrew To: <100scool@yahoogroups.com> From: "Huw Williams" Date: Mon, 24 May 2004 17:17:44 +0100 Subject: Re: [100scool] Landcruiser 100 Series 5 Speed Automatic Reply-To: 100scool@yahoogroups.com szewczyk andrew wrote: > Hi, > I've just joined 100scool. I was sent a copy of the email from > Maarten Verschure re the query on the A750 automatic transmission > which I can relate to. > I have an 09/03 build LC100 T/D which has an intermittent issue where > if you start hill descent, at 60kph & touch the brake pedal to slow > as you gather speed, the engine braking 'cuts in' & the engine speed > rises from 1100 rpm to 2250 rpm - being a diesel, very noticeable. > I'm definite that it's going from 4th to 2nd. Feels very over the top > for what is a negligible downhill gradient. FWIW they have copied this feature from others such as BMW. My X5 diesel does the same but it hits 3500 rpm when I would be perfectly happy to just maintain a constant forward speed in top gear with low revs. It even does this on downhill stretches in town where pedestrians must think a loony is driving LOL. Needless to say, I don't like the feature because it goes a gear or two too low. Much prefer the four speeder in my 100 series. Much more relaxing to drive. Huw