GS400 rear end...
#1
Lead Lap
Thread Starter
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Hi everyone,
I swapped my SC400 Diff because the ring gear cracked. The Diff I used was from a GS400. Now when i'm driving, I notice a difference in the MPH. When coasting around at about 10 MPH the cluster says i'm doing 20+.
What can I do to fix this problem w/o changing the Diff again ? It drives fine, I just want to be sure of how many miles i'm going.
I swapped my SC400 Diff because the ring gear cracked. The Diff I used was from a GS400. Now when i'm driving, I notice a difference in the MPH. When coasting around at about 10 MPH the cluster says i'm doing 20+.
![Uhh...](https://www.clublexus.com/forums/images/smilies/1387914497.gif)
#3
Lead Lap
Thread Starter
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
It was a last minute swap so I didn't have time to research it more. The driving experience isn't much different; it still feels stock-ish but it could be quicker.
#5
Lead Lap
Thread Starter
#7
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
i just installed 4.27 from a supra into my 98sc400, which was 3.266 stock
and my speedo is still on point per my in-dash navigation system... what year is your car? maybe lexus changed their speedometer to electronic for the later models... another guy installed diff gears and said his speedo is correct also per his navigation system
very interesting....
and yes i can't rem the name brand, but its a speedo correction device, motorcyles usually use them but they work on cars also..
call a performance shop and they can tell you exactly.. its 60-90 bucks...
and my speedo is still on point per my in-dash navigation system... what year is your car? maybe lexus changed their speedometer to electronic for the later models... another guy installed diff gears and said his speedo is correct also per his navigation system
very interesting....
and yes i can't rem the name brand, but its a speedo correction device, motorcyles usually use them but they work on cars also..
call a performance shop and they can tell you exactly.. its 60-90 bucks...
Trending Topics
#10
Lead Lap
Thread Starter
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
i just installed 4.27 from a supra into my 98sc400, which was 3.266 stock
and my speedo is still on point per my in-dash navigation system... what year is your car? maybe lexus changed their speedometer to electronic for the later models... another guy installed diff gears and said his speedo is correct also per his navigation system
very interesting....
and yes i can't rem the name brand, but its a speedo correction device, motorcyles usually use them but they work on cars also..
call a performance shop and they can tell you exactly.. its 60-90 bucks...
and my speedo is still on point per my in-dash navigation system... what year is your car? maybe lexus changed their speedometer to electronic for the later models... another guy installed diff gears and said his speedo is correct also per his navigation system
very interesting....
and yes i can't rem the name brand, but its a speedo correction device, motorcyles usually use them but they work on cars also..
call a performance shop and they can tell you exactly.. its 60-90 bucks...
Ill try that device you guys recommended & trouble shoot the problem with my mechanic.
Thanks for the help everyone.
Thread
Thread Starter
Forum
Replies
Last Post
PR FIEBRU
2Gen GS430 / 400/ 300 Classifieds (98-05)
9
07-13-11 03:03 PM
JeffTsai
North Texas Lexus Club
9
05-13-11 08:58 AM