Terence Bower Posted May 7, 2017 Share Posted May 7, 2017 Hi all,just been offered the above diff,anyone else done this please.I know the standard ratio is 4:5 but just how much of a difference will there be.Thanks in advance. Quote Link to comment Share on other sites More sharing options...
350Butcher Posted May 7, 2017 Share Posted May 7, 2017 Hi, Are you talking final drive? If so think there's a slight error with the numbers. To my knowledge there is a 4.08 (or 4.1) and 4.36 available and the stock ratio is 3.5 Changing the final drive does make a big difference, I've just changed to a 3.9 and was quite surprised how much difference it has made, both to how you can work the gear box now to keep the engine on song and where the revs now sit cruising on motorway runs. On paper it doesn't look like much but in the real world it does. The 4.08 upwards I would reserve for a track only car as its a bit full on for an every day road car in my opinion but each to there own I nicked this from the web..........gives you the idea STOCK 3.538 Gear-- ECU REFLASH 3.538 ---HR Engine 6600 Rpm Redline -------7200 Rpm Redline-----------7500 Rpm Redline First -----38mph ------First-----42mph-----------First-----43mph Second ----62mph-------Second----68mph-----------Second----71mph Third -----89mph-------Third ----97mph-----------Third----101mph Forth ----114mph-------Forth----124mph-----------Forth----129mph Fith -----144mph-------Fith-----158mph-----------Fith-----164mph Sixth ----182mph-------Sixth----199mph-----------Sixth----207mph No Reflash 3.9 Gear -- ECU REFLAH 3.9-----HR Engine 6600 Rpm Redline ----------7200 Rpm Redline-------7500 Rpm Redline First ------35mph-------First ---38mph-----------First-----39mph Second -----56mph-------Second---62mph-----------Second----64mph Third ------81mph-------Third----88mph-----------Third-----92mph Forth------103mph-------Forth---113mph-----------Forth----117mph Fith-------131mph-------Fith----143mph-----------Fith-----149mph Sixth------165mph-------Sixth---180mph-----------Sixth----188mph No Reflash 4.083 Gear-- ECU REFLASH 4.083--HR Engine 6600 Rpm Redline ------------7200 Rpm Redline---------7500 Rpm Redline First ------33mph--------First ---36mph----------First-----38mph Second -----54mph--------Second---59mph----------Second----61mph Third ------77mph--------Third ---84mph----------Third-----88mph Forth ------99mph--------Forth---107mph----------Forth----112mph Fith ------125mph--------Fith----137mph----------Fith-----142mph Sixth -----158mph--------Sixth---172mph----------Sixth----179mph Quote Link to comment Share on other sites More sharing options...
Terence Bower Posted May 7, 2017 Author Share Posted May 7, 2017 Hi,many thanks for your reply.Apparently the seller made a mistake on his numbers.Turns out its 3:48=which I guess must be a 3:5 truth be known? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.