to be honest if you have the power i'd go for a f13/5wr (which i now have on my c16xe) from driving it befor when i had the f13/5cr it is pretty much identicle gearing in 1st/2nd and 3rd, but 4th and 5th are a bigger jump so alot better for cruising on the motorway.. best to with an f13 tho as they have the inspection plate on the bottom of the box, so as long as you have a flat/non-pot type flywheel then its a peice of piss i.e half hour to change a clutch where as on an f15 you'd have to pretty much take the box out.....

im looking for an f13 to buy as mine is fooked. anyone got one spare that they are selling? pm me

i thought all x14xe had f15 box ?

it seems to be luck of the draw what gaerbox you have, certain models are supposed to have certiain boxes but not always. I've even seen an odd SR nova with no 4.18 fd and a wide ratio box. And for some reason i have seen C12NZ corsa's with 4.18 W boxes.

quote:

---

Originally posted by PaulW
F13/5CR was fitted to ALL X14XE engines (Sport, SRi 16v), aswell as C14SE on Corsa SRi 8v
F15/5CR was fitted to ALL C/X16XE Engines (Sport, GSi)

F13/5WR were fitted to 12NZ, C12NZ, X12SZ, C14NZ engines

if you want a model-to-gearbox comparisson chart I can do it as I got the information direct from Vauxhall for my own research into the Corsa B

[Edited on 15-03-2006 by PaulW]

---

quote:

---

Originally posted by PaulW
F13/5CR was fitted to ALL X14XE engines (Sport, SRi 16v), aswell as C14SE on Corsa SRi 8v
F15/5CR was fitted to ALL C/X16XE Engines (Sport, GSi)

F13/5WR were fitted to 12NZ, C12NZ, X12SZ, C14NZ engines

if you want a model-to-gearbox comparisson chart I can do it as I got the information direct from Vauxhall for my own research into the Corsa B

[Edited on 15-03-2006 by PaulW]

---

my old corsa sri with x14xe engine had an f15 gearbox. I knew the person who had it from new and they never replaced the gearbox so it came like that from vaux.

I've heard of other cars like this too.

seems vaux just fitted whatever they had lieing around.

F13/5CR was fitted to ALL X14XE engines (Sport, SRi 16v), aswell as C14SE on Corsa SRi 8v
F15/5CR was fitted to ALL C/X16XE Engines (Sport, GSi)

F13/5WR were fitted to 12NZ, C12NZ, X12SZ, C14NZ engines

if you want a model-to-gearbox comparisson chart I can do it as I got the information direct from Vauxhall for my own research into the Corsa B

[Edited on 15-03-2006 by PaulW]

remember that not all f13 or f15 boxes are CR, infact very few. Check the codes on both boxes for W or C, also check the fd ratio, 3.94 not very much difference in acceralation. You'd want a 4.18 fd to make any noticable difference, even at that you'd want small wheels.

gearing is different, but not overly great

but how do you mean go a bit better??

faster 0-60? top end?

judge for yourself (stats)

F13/5 CR

code:
Wheel rim size        14   Tyre section   185  Aspect ratio 65

diff ratio      3.94 Wheel diameter 23.468

1st gear ratio  3.55

2nd gear ratio  2.14

3rd gear ratio  1.43

4th gear ratio  1.12

5th gear ratio  0.89

                              rev limit 6500                <-  rev drop at ->

                                                    Limit   <- change point ->

            1000 2000 3000 4000 5000 6000 7000 8000 6500    500-600-700-800-650

1st (3.55 )  4.9   10   15   20   25   30   35   40   32    301 361 421 482 391

2nd (2.14 )  8.2   17   25   33   41   50   58   66   54    334 400 467 534 434

3rd (1.43 ) 12.3   25   37   50   62   74   87   99   81    391 469 548 626 509

4th (1.12 ) 15.8   32   47   63   79   95  111  127  103    397 476 556 635 516

5th (0.89 ) 19.9   40   60   80  100  119  139  159  129





Revs @ 60 mph in 4th 3.792  Revs @ 70 mph in 4th 4.424

Revs @ 60 mph in 5th 3.013  Revs @ 70 mph in 5th 3.515

code:
Wheel rim size        14   Tyre section   185  Aspect ratio 65

diff ratio      3.74 Wheel diameter 23.468

1st gear ratio  3.73

2nd gear ratio  2.13

3rd gear ratio  1.41

4th gear ratio  1.12

5th gear ratio  0.89

                              rev limit 6500                <-  rev drop at ->

                                                    Limit   <- change point ->

            1000 2000 3000 4000 5000 6000 7000 8000 6500    500-600-700-800-650

1st (3.73 )  5.0   10   15   20   25   30   35   40   33    285 342 399 456 371

2nd (2.13 )  8.7   18   26   35   44   53   61   70   57    330 397 463 529 430

3rd (1.41 ) 13.2   26   40   53   66   79   93  106   86    397 476 556 635 516

4th (1.12 ) 16.6   33   50   67   83  100  117  133  108    397 476 556 635 516

5th (0.89 ) 20.9   42   63   84  105  126  147  168  136





Revs @ 60 mph in 4th 3.599  Revs @ 70 mph in 4th 4.199

Revs @ 60 mph in 5th 2.860  Revs @ 70 mph in 5th 3.337

right im takin the engine (x14xe) out to do a bit of work on the car, ive been told that if i put a f15 instead of the f13 on my 1.4 it will go a bit better, is this true? or should i just stick with the f13?

]let me know ur findings/knowledge, cheers :thumbs: