Are the front and rear axel differentials on a 3.5 auto the same as a four speed manual box.
Range rover early eighties for both stromburg carbs cd175
reason I ask is I have removed the manual 3.5 engine and box and replaced with an 3.5 auto engine and box, problem is it now seems to be having trouble getting over 50 mph without it sounding like it is revving really high. I cant tell you what the revs are as it is a hybrid (shortened RR on LR body). Have not fitted clocks yet.
Is there a formular to calculate the speed loss buy adding larger tyres, taking into account gear box and differential ratio?
regards
wayne