Ls400 Rear View Mirror & Transmission Puzzled?

[ssls400]

hi i have a lexus ls400 1992,i have a standard rear view mirror and would like to upgrade to the electronic rear view mirror.can this be done as i have looked and cant seem to find the wiring for it.

the other problem i have is i have drained and refill the transmission fluid with toyota type 4 fluid.i only did the drain and refill not the complete flush out.the thing is since then, every now and then wherether its hot or cold or in neutral or drive the car jolts as if you have stalled it this is the only way i can describe it.when it is in drive and doing any speed i can feel the car sort of jerk or jolt and the rev drop a little then back up.if in neutral and my foot is on the brake the car does the same thing again its like you have brought the clutch up fast and stalled it.i hope you understand how i am trying to describe it to you.before i did the oil change this was spot on,please please can you help as i take my kids to school and i want some advice on how to sort this out quickly

thanks

[Haylands]

Hi.

Have you filled up with the correct amount, there is a procedure to go through to ensure that you read the correct level in the transmission, check in your handbook. Too much fluid is as bad as not enough. If it has only done this since you changed the oil then I can only imagine it is a level issue...... what else has changed.....

The photocromatic rear view mirror just needs a live wire feed from the headlight circuit.

Pete

[ssls400]

Hi.

Have you filled up with the correct amount, there is a procedure to go through to ensure that you read the correct level in the transmission, check in your handbook. Too much fluid is as bad as not enough. If it has only done this since you changed the oil then I can only imagine it is a level issue...... what else has changed.....

The photocromatic rear view mirror just needs a live wire feed from the headlight circuit.

Pete

hi pete, thanks for getting back to me.according to my book i had to refill exactly 1.9 litres of atf,which i did when the engine is cold and i check the dipstick both cold and hot are covered in oil.not checked yet when hot.but before i did the change of oil the tranny box was ecellent,

could you be so kind to give me more info into the photocromatic rear view mirror

thanks

[Haylands]

Hi

Can only think the gearbox will be a level issue, did you measure how much oil came out, the amount stated by Lexus will presume that every last drop came out, well loads get stuck in corners and coat the inside of the box, unless the oil was very hot when you drained it I bet you haven't got out as much as they say.... Check it when hot, not sure on your model but you usually have to drive it for a while to warm up then stop and put the lever in park for a while, then reverse for a while, then neutral etc all the way down, then check the level with the engine running and the car on a totally level surface.... Anyway it should give the exact procedure in the hand book.

The photocromatic mirror has a light sensor in the front and the back, if the back one measures more light than the front one then it presumes that a car is following you with its lights on so it tints the mirror untill its dark and reduces the glare.... fitted one a while ago to a mates Megane, the top of the range one comes with it and he bought one for his basic car, anyway just found a live feed from the headlight circuit and wired the mirror to this so it only operates when dark and you have the lights on. Don't know if you would have the wireing for it already in you car if not you have to find a feed under the dash, and get the wire up to the mirror location. Probably be quite a lot of work but only you know weather its worth it....

Good luck

Pete

[Matrixabc]

Make sure you used the right atf fluid, On my (ex) Audi an Audi specialist was going to put dextron 3 in, but the Audi box uses a special fluid made by esso, and dexstron will eventually damage the gear box. its all down to friction modifiers...or so I have been told.

I would check with Lexus as to the correct fluid. if it is different now would be the time to put the correct fluid in. before its to late..

[ssls400]

Make sure you used the right atf fluid, On my (ex) Audi an Audi specialist was going to put dextron 3 in, but the Audi box uses a special fluid made by esso, and dexstron will eventually damage the gear box. its all down to friction modifiers...or so I have been told.

I would check with Lexus as to the correct fluid. if it is different now would be the time to put the correct fluid in. before its to late..

hi i have put in toyota type 4 fluid in, i have drain the oil to the correct level now but still does the jolt.so i did a dianogstic on it and the tranmissopn came up with codes 67 & 68 which is

od direct clutch speed signal malfunction

short circuit in kick down switch

this only started after i did the transmission oil change,before it ran superb.i am wondering whether to try and disconnect the Battery for 15 miis to reset the ecu.hoping that will cure it other from that i am out of ideas

[steve2006]

I go along with other members in that an overfill is the main suspect.

The series 2 gearbox incorporates a "shift shock" system where when selecting drive the box goes 1st into 3rd then 2nd before going to 1st thus eliminating the jolt sensation.

The other consideration is that the new fluid has improved transmision shifts since the old fluid would have deteriorated hydraulic properties.

Not sure about the fault codes as you say try a reset then reread

[ssls400]

hi spoke too soon,the problem is back after disconnecting the Battery, didnt do anything for nearly 2 days but then i wasnt driving a few miles,went out in lexus today and the problem was back.i have read that i should have never mixed the type 4 atf with the old oil as it can damage the solenoids and the direct clutch speed sensor.the only possible way that i might be able to sort it out is to do a complete flush out of the tranny oil and replace with fresh new type 4 atf. and possibly replace the sensor for the clutch speed sensor.do you think this will rectify it??

advice is much appreciated!!

thanks

[steve2006]

I would have assumed the "old oil" would have been type IV so all you have done is replace some of it with fresh ATF but I cannot understand how doing a partial change can affect the shift solenoids and direct clutch speed sensor as these are electrical/electronic components not hydraulic.

Do you have a link to the info you read?

Interesting info here

http://www.autoshop101.com/forms/h16.pdf

[ssls400]

hi i cant understand it either as it is very hard to describe when i am reving about 2000rpm in drive the revs drop about 3 or 400 revs and at that point you can feel the gear box sort of jolting and losing slight lack of power then the revs shoot back up to where it was previosly.i have done the diagnostic again and still reading code 67 and 68,

i am at loss with this

any ideas???

[TigerFish]

anyway just found a live feed from the headlight circuit and wired the mirror to this so it only operates when dark and you have the lights on.

If the wiring is not already present for the mirror, you can just take a switched 12V feed from the sunroof somewhere (or map reading light). Even if the mirror is powered during daylight hours, the sensor on the back of the mirror will always pick up more light and stop it from dimming. Much easier than trying to run a feed from the lighting system up and across the roof liner. If it was going to be wired up fully it should turn off the dimming feature when the car is put in reverse so that even at night, you get a full unhindered view in the rear view mirror.

[Rob00158]

Hi All,

Just a thought - When I changed the transmission fluid on my old GS, pouring the fresh fluid in stirred up the sedement in the sump which then blocked up the filter / pickup pipe and caused very very bad gear changes (sometimes it just stayed in first!!)

Had to remove the sump, clean it out and wash out the filter, I then changed the fluid a couple more times after this. This rectified my problem.