F18 cr

[Nobby]

Anyone use this box on any big block engine? Ive just sold my F20 after somehow blowing 5th gear last year. Iv had a spare F18 for a while that i took off a J plate 2.0 8v Cally and ive just checked the part number and realised its a C357, which according to a table ive found is the CR box and is 0.3 quicker on 1st gear and 0.2 slower on 2nd gear (thats if what understanding of ratios i have is correct lol) difference from an F20?, People say that the F18s are no good etc etc but im gona give this one a whirl i think, whats peoples experiences opinions?? Heres said table -

F18c (3.57) 3.58 2.14 1.48 1.12 0.89 3.33 3.57
F20 (3.55) 3.55 2.16 1.48 1.13 0.89 3.33 3.55

[mowgli]

its actually 0.03 & 0.02 in the table... thus its hardly any different to what you had

[Nobby]

oh ok lol yeah thats what im thinking mate, been reading that the F18s in the Vectra were shiiite but the earlier ones from the Cav Astra and Calibra were ok, i suppose just whack it in and see what happens!