ALL SC400's..my 4.27 REAR swap REVIEW
04-26-10, 10:59 PM
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ALL SC400's..my 4.27 REAR swap REVIEW
i have a 98 SC400 and i belive the stock rear end is 3.266 per lextreme.. and i had dynosaur performance install 4.27's with stock LSD from a Supra... AND IT FEELS LIKE A BEAST!!! i would advise every1 to do this swap! 
I was nervous it would start giving up on the top end.. but i went up to 120mph and it was still pushing.. dynosaur said i should be good up to 140mph per the 5th gear, and i plan on swapping a GETRAG 6SPEED TRANNY next
it loses traction easily at WOT
AND BOTH TIRES ARE FINALLY SPINNING
lol
with the stock rear end, all the power was up top, basically after 50mph.. now it feels like a real v8 from a dig as well!
and i found out that our speedometer is electronic b/c everyone said the speedometer would be off swapping the rear end out and it's still on point.. my friend has 430's in his camaro and it says he's going 100mph when he's only crusing maybe 30-40mph lol
NOW ON THE HWY AT 60MPH IT USED TO CRUISE AT 2000RPM'S...NOW IT CRUISES AT 2900-3000RPM'S AT 60MPH... but ehhh not that bad lol
if that's an issue to you, 4.08's should have you around 2500-2700 maybe lol
I was nervous it would start giving up on the top end.. but i went up to 120mph and it was still pushing.. dynosaur said i should be good up to 140mph per the 5th gear, and i plan on swapping a GETRAG 6SPEED TRANNY next
it loses traction easily at WOT
AND BOTH TIRES ARE FINALLY SPINNING lolwith the stock rear end, all the power was up top, basically after 50mph.. now it feels like a real v8 from a dig as well!
and i found out that our speedometer is electronic b/c everyone said the speedometer would be off swapping the rear end out and it's still on point.. my friend has 430's in his camaro and it says he's going 100mph when he's only crusing maybe 30-40mph lol
NOW ON THE HWY AT 60MPH IT USED TO CRUISE AT 2000RPM'S...NOW IT CRUISES AT 2900-3000RPM'S AT 60MPH... but ehhh not that bad lol
if that's an issue to you, 4.08's should have you around 2500-2700 maybe lol
04-26-10, 11:19 PM
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well i guess i can track it on the alpine nav system and post it... but to give you an idea...
CRUISE SPEED WITH RPMS
STOCK - 3.266 - 60mph - 2000RPM
SWAP - 4.27 - 60mph - 2900-3000RPM
I try to control my gas for every 4 days, which is about 7 full tanks a month
CRUISE SPEED WITH RPMS
STOCK - 3.266 - 60mph - 2000RPM
SWAP - 4.27 - 60mph - 2900-3000RPM
I try to control my gas for every 4 days, which is about 7 full tanks a month
04-26-10, 11:40 PM
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04-26-10, 11:42 PM
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it's every 4-5 days, about 5-7 full tanks a month
now you got me thinking about my driving habits lol
Last edited by cino21; 04-26-10 at 11:45 PM.
04-27-10, 07:21 AM
#12
Your speedo is correct? It may seem correct but the sensor is in the transmission, so anything that happens after that sensor wont be accounted for.... like the diff
Unless the 98 is different than the 92-97, the speedo should be off.
Regardless, nice swap on the diff, I bet it comes to liiiiiffeee
Unless the 98 is different than the 92-97, the speedo should be off.
Regardless, nice swap on the diff, I bet it comes to liiiiiffeee
