Evo 8 Dual Purpose, 5 speed, 4.59 or 4.11 Final Drive: help me decide

[glynwarren]

Originally Posted by Steviej

You will need the rest of the gearbox code to identify which ratios it has ie. 2-XA61, 2-XA62 etc.

my gearbox code is w5m511x7auq3904 ive looked but I cant find it, im not so computer literate, its taken me all this time to refind this thread to see if anyone replied! thanks for your help, im thinking if I cant find my ratios an final drive I may be able to find an appropriate 5th gear set, im yet to find out if thegears are stamped with their ratio, ive just got no idea , thanks for the reply

[Steviej]

Ok see below from the manual, W5M51-1X7A .. gearbox codes can have either the 'A' gear set (GSR) or the 'B' gear set (RS) They seem to all have the 4.529 final drive but possibly could also have the shorter 4.875 final drive, so its a bit of a lottery, Set B with a 4.875 is very short but could be substituted with a 4.529 to make it longer, or you could change 'B' set 5th gears for an 'A' set which would also help. There are a few possibilities but you would need to find out what is in there first to be certain, which is basically a tooth counting excersize !
I may have some spare parts available depending what you would need .

W5M51-1-X7A Gear set A Final Drive 4.529
W5M51-1-X7A1 Gear set A Final drive 4.529
W5M51-1-Z7A Gear set B Final drive 4.875
W5M51-1-Z7A1 Gear set B Final drive 4.875
W5M51-1-X7A2 Gear set B Final drive 4.529
W5M51-1-X7A3 Gear set B Final drive 4.52

[Clivew]

Originally Posted by glynwarren

my gearbox code is w5m511x7auq3904 ive looked but I cant find it, im not so computer literate, its taken me all this time to refind this thread to see if anyone replied! thanks for your help, im thinking if I cant find my ratios an final drive I may be able to find an appropriate 5th gear set, im yet to find out if thegears are stamped with their ratio, ive just got no idea , thanks for the reply

You have an Evo 4 GSR ratio box, which will feel really short on a Legnum! What you need is a higher ratio 5th and a 4.11 final drive.

The 5th ratio you have is a 0.761, and you require a 0.720.

[glynwarren]

Originally Posted by Steviej

Ok see below from the manual, W5M51-1X7A .. gearbox codes can have either the 'A' gear set (GSR) or the 'B' gear set (RS) They seem to all have the 4.529 final drive but possibly could also have the shorter 4.875 final drive, so its a bit of a lottery, Set B with a 4.875 is very short but could be substituted with a 4.529 to make it longer, or you could change 'B' set 5th gears for an 'A' set which would also help. There are a few possibilities but you would need to find out what is in there first to be certain, which is basically a tooth counting excersize !
I may have some spare parts available depending what you would need .

W5M51-1-X7A Gear set A Final Drive 4.529
W5M51-1-X7A1 Gear set A Final drive 4.529
W5M51-1-Z7A Gear set B Final drive 4.875
W5M51-1-Z7A1 Gear set B Final drive 4.875
W5M51-1-X7A2 Gear set B Final drive 4.529
W5M51-1-X7A3 Gear set B Final drive 4.52

thanks steve, I feel like I need a spare gearbox, sadly I cant afford one! at the moment 3500rpm is 70 mph, I realistically want to reduce this by 1000-1500 rpm, I cant believe I haven't see this reply sooner,i don't know my way around this forum at all yet! if have got parts it would be much appreciated, do you know if the gears from a galant n/a v6 sport will fit in the gearbox, I have one sitting around, sadly my clutch change was an emergency change so I literally just swapped the clutch, and put it all back together! id like to think id have time to remove the gearbox and take it apart and work on it for a few weeks, life isn't allowing me this sadly

[glynwarren]

Originally Posted by Clivew

You have an Evo 4 GSR ratio box, which will feel really short on a Legnum! What you need is a higher ratio 5th and a 4.11 final drive.

The 5th ratio you have is a 0.761, and you require a 0.720.

it is super short, I can literally ignore 1st gear, and 5th is just a constant source of disappointment, is there a way of knowing how much this would change the rpm?

[Clivew]

Originally Posted by glynwarren

it is super short, I can literally ignore 1st gear, and 5th is just a constant source of disappointment, is there a way of knowing how much this would change the rpm?

Compare the first and last graph in post #6 of this thread. You have the first graph, and want the last one, in regards to ratios.