F450 Job 3 hard shifts after spartan install

[Darektylka]

i installed a spartan 250 on buddys f450 and shifts very firm even after relearn with 210 tow and 250 tune?
ANY suggestions?

I installed spartan on my f350 and the shifts are great but on this f450 its like banging into gear.

[08stroker250]

I have heard numerous people say that shifts are noticeably harder on F-450's and F-550's. I am not sure unless it has to do with weight and more axle wrap.

[Darektylka]

anyone else with a f450 tuned?

[jt720]

Working on it just ordered everything up from Rudy's

[Darektylka]

let me know how it goes.
thanks

[maddenjr]

I have a 450 and it deff shift hard but it only is real hard on the 210 tow tune! I have been running the 250 tune for 10k miles and its been good and alot of fun spanking cars!

[ksipes1]

Originally Posted by Darektylka

anyone else with a f450 tuned?

I have had my 08 F450 tuned for two years. My 210 tune shifts fine and I use it as a daily driver. The 275 tune shifts the hardest but gets the best mileage. The 250 tune is hard shifting, but not as bad as the 275.
I heard KEM can custom tune for the higher horsepower but a tamer shift.

[KTMotoRider1]

I would think it has something to do with the different rear axle, springs etc. in the rear end of the F450. and maybe the lower gearing?

[Redram99]

I just have a F350 and my 210tow and 250 shift terrible as well. The standard 210 shifted ok though.
I got a custom 250 built that works awesome!!

[Jacob_24]

Get a kem tune 250, much much better in my opinion.