4.10 cruising speeds
 

How big of a hit does the 4.10 install do to the car's top end?

Approx. what rpm will the engine sit @ going 85mph in 5th gear?

RE: 4.10 cruising speeds
 

What size tires are you running? There's a spreadsheet that calculates that but requires gears AND tires plus manual or auto tranny. I'll assume you're a GT and not a V6

RE: 4.10 cruising speeds
 

Stock pirellis. I think 235/55. 17" wheels. 5 speed manual.

RE: 4.10 cruising speeds
 

PM me with your e-mail and I'll send you the spreadsheet. I can't attach an excel file on the forum.

RE: 4.10 cruising speeds
 

E-mail sent.

RE: 4.10 cruising speeds
 

Post the answer to the question and any info you find out, as it will be helpful and will prevent a wasted thread.

Plus, I am interested in finding out the answers and any additional info as well.

RE: 4.10 cruising speeds
 

I have stock 17" tires, and am at 2,500 rpm's at 70mph in 5th gear.

RE: 4.10 cruising speeds
 

how much does top end suffer with the 4:10s? being stock it falls flat around 120ish with the
3:55s(auto).Hate to see what 4:10s will do,any of you still top out (140) pretty quick??