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Old 03-15-2019, 09:13 PM   #1
solleks's Avatar
Join Date: Apr 2018
Location: CA
Posts: 32
Year: 1995
Coachwork: Bluebird
Chassis: International
Engine: DT466, AT545
Rated Cap: 8 windows
Grapevine with AT545

Have any of you guys ever done the grapevine in CA with an AT545?

I did it once heading south bound, it got pretty hot can't remember exactly but it was also summer and high 90s farehnheit! I think i hit about 20 mph in some spots.

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Old 03-15-2019, 09:26 PM   #2
Bus Geek
ol trunt's Avatar
Join Date: Apr 2012
Location: So Cal
Posts: 3,133
Year: 1935
Coachwork: Superior
Chassis: Chevy
Engine: 317 ci/tid / Isuzu
It is what it is. My MCI 9, 8V91 would only pull the vine at 40 mph. On the other hand, My shorty with the Isuzu 317 cu in TD will blow up the hill at 55 mph hauling the toad until some jackass in an over loaded Pete swings out in front of me then I'm back down to 40 mph in the slow lane cussing!
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Old 03-16-2019, 01:54 PM   #3
Bus Geek
Join Date: May 2009
Location: Columbus Ohio
Posts: 15,798
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
I didnt run the grapevine.. but did run I80 last summer in a 40 year old bus with a 392 V8 and an AT-540.. was headed up the 8700 ft grade in wyoming.. the engine was tuned for thinner air so it was hauling ass up the grade with my foot to the floor.. until i got the transmission so hot I boiled out a few quarts of fluid.. it didnt catch on fire and despite the fact I measured WELL OVER 300 with an infrared gun on the trans case, my fluid stayed red... I let it cool down, filled it back up.. and ran it nice N easy at 25 in 3rd gear.. going down I kept it in 3rd and did the "pulse and glide" method of braking... let it run up to about 35.. braked it back to 30.. let it slowly go back up to 35.. etc.. never smelled hot brakes or felt like i was going to have any issues..

well actually at one point I REALLY smelled hot brakes and so I took the nearest ramp which was uphill... stopped only to find it was a Semi ahead of me (I surmise) since he was at the bottom of the hill in a plume of brake smoke when I finally did get there..

taking it slow was the theme here that got me through it.,. when i tried to haul , the bus complained...

I finished the next 1900? miles of the trip without any issues on the transmission so apparently I didnt ruin it
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