View Poll Results: Would you be interested in having LS400 brakes on your 2nd Gen GS?
Yes, because it would be cheaper!!
5
55.56%
Yes, because I like the way LS400 brakes look.
2
22.22%
No, I still like Supra TT brakes better.
2
22.22%
Voters: 9. You may not vote on this poll
LS400 brakes do fit 2nd Gen GS!!
04-01-10, 04:18 PM
#211
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I just finished putting LS400 brakes on my 2000 GS300 everything went great until I drove the car and have a very spongy feel. I have bleed my brake system 3 times finally gave up and took it to brakes plus even after having them bleed my brakes it still felt the same. I dont have and ABS or brake lighton it almost feels as if my GS300 brakes had better response any help you can provide would greatly be appreciated.
04-01-10, 04:25 PM
#212
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Thread Starter
I "THINK" the reason why you get the very spongy feeling on your pedal is because the LS calipers (4 pot) takes up more brake fluid than your old set up. So you have to press the pedal farer down.
Now, I sold me lexus more than 4 years ago, so I don't have on to play with but on my race car, my push rod is adjustable. If the GS is adjustable, you can play with that. Push it out a little more so you don't have to press down the pedal as much. Another thing is to get a larger mastercylinder.
Good luck.
Now, I sold me lexus more than 4 years ago, so I don't have on to play with but on my race car, my push rod is adjustable. If the GS is adjustable, you can play with that. Push it out a little more so you don't have to press down the pedal as much. Another thing is to get a larger mastercylinder.
Good luck.
04-01-10, 04:47 PM
#213
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I just finished putting LS400 brakes on my 2000 GS300 everything went great until I drove the car and have a very spongy feel. I have bleed my brake system 3 times finally gave up and took it to brakes plus even after having them bleed my brakes it still felt the same. I dont have and ABS or brake lighton it almost feels as if my GS300 brakes had better response any help you can provide would greatly be appreciated.
04-01-10, 05:13 PM
#214
I just finished putting LS400 brakes on my 2000 GS300 everything went great until I drove the car and have a very spongy feel. I have bleed my brake system 3 times finally gave up and took it to brakes plus even after having them bleed my brakes it still felt the same. I dont have and ABS or brake lighton it almost feels as if my GS300 brakes had better response any help you can provide would greatly be appreciated.
04-01-10, 06:14 PM
#215
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How can you check a brake booster? Also is their a possibility I could have a bad Master Cylinder? Is their a way to check? I just went for a short drive and noticed that the pedal gets firm the way it should be for a few seconds then it goes back to spoongie. Everything was purchased new LS400 calipers new slotted rotters brakes plus even did the fluid flush so it shouldent need new fluid.
04-01-10, 07:59 PM
#216
Rookie
Thread Starter
I'm sure your brake booster is working. If your brake booster is not working, the pedal will be very stiff and yet you don't feel like the brakes are working. Also known as "Manual Brakes" VS "Power Brakes" Just to give you a clear idea of what it is like if your brake booster is not working. Try using your brakes when your car is off.
So once again, it's because the LS calipers has 4 pistons VS stock GS has 2 pistons and it takes more pressure/fluid to make those things work.
So once again, it's because the LS calipers has 4 pistons VS stock GS has 2 pistons and it takes more pressure/fluid to make those things work.
04-01-10, 09:16 PM
#217
So just to be quick, the abs unit/master in these vehicles is VERY tricky to bleed the air out of correctly without the proper scan tool. I just put tt's on my 2gs a while back and it took me several attempts to get the air out of the unit, without damaging it i might add! A week later the abs motors, integral the abs unit, wouldn't stop running! Turned lights on, stored codes in the EBCM and everything. Still had some air in it somewhere. Keep workin at it you'll get it.
It's doable without a scan tool, but a little more labor intensive.
It's doable without a scan tool, but a little more labor intensive.
04-01-10, 09:41 PM
#218
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I'm going to keep working at it hopefully your right and I will eventually get it. Is their anybody out their who has LS400 calipers on their GS300 that can provide some input and let me know if they have a spoongy feel to their brake pedal?
09-07-10, 06:32 PM
#220
when doing this swap, supra brakes or ls400, do you guy change MBC (master brake cylinder)? what about the brake balance front to rear? do u also install brake balancer?
p.s. supra tt brakes were made by sumitomo. its a company that makes brakes for race cars and race bikes. this is why the only car to beat the supra from 70-0 is a carrera gtJ guess whom work on it's brakes?
supra brakes are way ahead of the ls400 no question about it.
p.s. supra tt brakes were made by sumitomo. its a company that makes brakes for race cars and race bikes. this is why the only car to beat the supra from 70-0 is a carrera gtJ guess whom work on it's brakes?
supra brakes are way ahead of the ls400 no question about it.
09-07-10, 06:37 PM
#221
bought the lexus stickers for them but they wont go on the ls calipers 
09-20-10, 11:07 AM
#223
well, OP was wrong....they do fit and now with no grinding required
sorry, as we been talking about LS400's alot lately i figured i would post these,even though this post is old as dirt
lS400's will fit with a Sage RCA kit even on stock 16's with a 15mm Spacer
Figs is making a RCA also and i might test that to see if they fit also but they should with no issue, but for sure again with the Sage RCA kit they will fit with no grinding on any bolt
https://www.clublexus.com/forums/sus...o-rubbing.html
lS400's will fit with a Sage RCA kit even on stock 16's with a 15mm Spacer
Figs is making a RCA also and i might test that to see if they fit also but they should with no issue, but for sure again with the Sage RCA kit they will fit with no grinding on any bolt
https://www.clublexus.com/forums/sus...o-rubbing.html
Last edited by sakataj; 09-20-10 at 01:41 PM.
09-22-10, 03:50 AM
#224
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I havent done it myself, but the 98 ls400 we looked at buying insted of the gs only had 16" rims as standard.
