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Any suggestions for batteries besides Optima? They are expensive. My only use is engine starting. also, where to get the 6tl adapter tray for what ever batteries will fit?

Optima batteries Do you know the model number of the Optimas and where I can get the adapter tray?

Any one have suggestions on replacing batteries on my M35A3 has Allison auto and CTIS, if relevant

Truck started using 12 volt jump starter! Running smoothly but no air bleed off while engine idling. Drove it for about 3 miles, no change, runs great but why no air bleed? It's an A3 with Allison auto

Thank you will report back

Thanks, SCAR59, will report back this week-busy last week baling hay

Problem is it won't start. Charged batteries, all OK but instead of the loud buzzer I hear a whirring sound like something is spinning. Also, several months prior to this I stopped hearing the bleed off of air as the truck is idling

I am new to this forum, have an M35A3 in SW SC and need some mechanical advice and probably a visit to my shop to look at the truck. Problem seems to be with the air system. air pressure will not build when cranking and I her a whirring sound like the pump is not working? Just my uninformed opinion.