'98 SC400 Transmission Pressure adjustment
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Joined: Dec 2006
Posts: 76
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From: MA
'98 SC400 Transmission Pressure adjustment
searched... many times...
I have myself a 98 SC400 with that beautiful 5 speed (slow shiftin) Auto.
does the line tightening method to boost fluid pressure work for the 98 models? If so, where would I find the line to adjust?
Pictures would be wonderful as they truely do speak 1000 words.
I have myself a 98 SC400 with that beautiful 5 speed (slow shiftin) Auto.
does the line tightening method to boost fluid pressure work for the 98 models? If so, where would I find the line to adjust?
Pictures would be wonderful as they truely do speak 1000 words.
Thread Starter
Rookie
Joined: Dec 2006
Posts: 76
Likes: 0
From: MA
THat's a bummer to hear. I know in some older cars, it's a simple tension adjustment under the hood. The line looks similar to the fuel line, and when adjusted would raise the transmission oil pressure for faster harder shifts.
Dropping the pan would be the install of a Shift kit. That is what I would also like to do in the future. I dont know where to purchase a shift kit and the search term is too short... (4 or more letter words). The only place I know that sells them is in Australia, and there's no website or order forms that I know of.
Dropping the pan would be the install of a Shift kit. That is what I would also like to do in the future. I dont know where to purchase a shift kit and the search term is too short... (4 or more letter words). The only place I know that sells them is in Australia, and there's no website or order forms that I know of.
THat's a bummer to hear. I know in some older cars, it's a simple tension adjustment under the hood. The line looks similar to the fuel line, and when adjusted would raise the transmission oil pressure for faster harder shifts.
Dropping the pan would be the install of a Shift kit. That is what I would also like to do in the future. I dont know where to purchase a shift kit and the search term is too short... (4 or more letter words). The only place I know that sells them is in Australia, and there's no website or order forms that I know of.
Dropping the pan would be the install of a Shift kit. That is what I would also like to do in the future. I dont know where to purchase a shift kit and the search term is too short... (4 or more letter words). The only place I know that sells them is in Australia, and there's no website or order forms that I know of.
http://www.supraforums.com/forum/sho...d.php?t=267655
here's another, more fitted to our cars (updated)
http://jkwebdesign.net/lsocbb/viewtopic.php?t=1915
http://jkwebdesign.net/lsocbb/viewtopic.php?t=1915
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Pit Crew
Joined: Oct 2011
Posts: 160
Likes: 126
From: CA
Devir, there is a link I found and someone did it to their SC430 with the same A650E trans equipped, it's as simple as dropping the transmission oil pan and using a flathead screw driver and pushing it in and turning it clockwise. I'll post a picture of what needs to be adjusted. I did the adjustment on my 98 sc400 and the shifts are much more firm and quicker and it took the delay out
Pit Crew
Joined: Oct 2011
Posts: 160
Likes: 126
From: CA
Devir, there is a link I found and someone did it to their SC430 with the same A650E trans equipped, it's as simple as dropping the transmission oil pan and using a flathead screw driver and pushing it in and turning it clockwise. I'll post a picture of what needs to be adjusted. I did the adjustment on my 98 sc400 and the shifts are much more firm and quicker and it took the delay out
The tranny fluid was pretty nasty in my '98 when I bought it, so I did this mod at the same time as a good excuse to do a more thorough drain than just opening the plug. If there was any resulting performance difference, it was too minor to be sure.
Here's a more detailed thread for people wanting to try it: https://www.clublexus.com/forums/per...ting-dial.html
Here's a more detailed thread for people wanting to try it: https://www.clublexus.com/forums/per...ting-dial.html
Pit Crew
Joined: Oct 2011
Posts: 160
Likes: 126
From: CA
it's worth it, I've been driving around like this for a year now, the shifts feels very good and pulls hard into the next gear, the idea of it is to also save the life of the clutch packs so it takes away the delay and it helps from keeping the trans from creating too much heat
here's the original thread, its a good read for anyone who has the auto 5sp A650E, goes for 98+gs300/gs400/ls400/sc400/ and is300. i'll share a video
https://www.clublexus.com/forums/sc4...0-a-650-e.html
here's the original thread, its a good read for anyone who has the auto 5sp A650E, goes for 98+gs300/gs400/ls400/sc400/ and is300. i'll share a video
https://www.clublexus.com/forums/sc4...0-a-650-e.html
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