School bus highway pull WOT, 5-60 mph Thomas C2 Cummins ISB

Uphill highway on-ramp pull on a circa-2012 Thomas Saf-T-Liner C2 with Cummins ISB and a 5-speed Allison 2000-series transmission. Bonus warm start.

[@charlesrodriguez7984]

I love that rear differential humming with the sounds of tire tread whine and a Cummins 6.7 muscling a big bus up to 60mph. Nice video.

[@josephwillett4298]

What is it about the shift to 5th gear??? It puts a smile on my face

[@takai1284]

We need some more videos

[@veganorma14]

You should do a 0-60 next

[@Kadencabs]

1:04 my c2 hums like that too (2015)

[@LethalTunedHNP2846]

But I thought you only watch vq 350z vids. But no, your here?

[@Kadencabs]

@@LethalTunedHNP2846 my vehicle playlist on yt has like 3000 videos i watch everything

[@lijiang2743]

@@Kadencabs I'd say that bus does pretty well on the highway.

[@Kadencabs]

@@lijiang2743 it really does

[@zayaRBLX]

my c2 has an b6.7 but the spare one i rode 2014 has that noise

[@gatorheadsouls2127]

More vids like this please 🔥🔥

[@clover7359]

I could have sworn the C2s with the ISB got the allison 2500 6 speed auto starting in 2011. I could be wrong.

[@yitznewton]

From what I understand, it is a 6-speed transmission with 6th gear locked out in some applications. Our C2s use the first 5 only

[@arandomperson8]

@@yitznewtonThere is a only 5 gear version of the 2500 so maybe you guys have those

[@joshuagalka3526]

Love it!

[@nicksevers8045]

What rear gear? HP rating?

[@yitznewton]

I'm afraid I couldn't tell you

[@nicksevers8045]

@@yitznewton Ah that's alright

[@PhonesAndOtherGoods95]

I would be scared too 😮

[@nicksevers8045]

@@PhonesAndOtherGoods95 LOL

[@charlesrodriguez7984]

@@yitznewtonprobs 200 hp with a high gear ratio. That is probably what it has.