Rear End Gear Ratio

yeah obviously I haven't driven my 13 in several months. Been driving an old 15 single over.

 

My brain must have been sleeping.
It was a single over 13 .86 o/d.
And yes I called him to see what happened to him. He could not keep up and I ran off and left him.

 

I'm not familiar with a single over 13 with a .86 high gear either but regardless, you saying that you walked away from a 3.55 rear with your 2.93 rear doesn't make sense to me. First two scenarios that I can think of are either his ECM is cutting fuel or he backed out of it for some reason....high EGT or coolant temps.

 

It's all in the gear steps in the trans.
They make different gear sets for the trans.
When I first was told the gear ratio of the truck I was about scared off from it.
Then I was told about how they have different gear sets within the trans and that makes up for it.

 

The steps are just dealing with the rpm drop between gears. I don't get why he couldn't find a gear to match your final ratio and pull the hill right along with you. What model 13 do you have compared to your friend?

 

http://www.roadranger.com/rr/ProductsServices/ProductsbyCategory/Transmissions/PCT_486870

Link to the gear steps and o/d in the transmission.
I haven't had the truck since I sold all my equipment in 2010.
So I don't have the trans model number.

 

Im looking at a 1998 freightliner century with 12.7 Detroit 60series. It have a 10 sp tranny with 2.79 gear ratio. Is it gd to go otr with? Performance? Mpg?

 

2.79, that is probably direct drive top gear and would be turning 1600 RPM at 65 mph. Not terrible, but I seem to get best balance of performance and mpg turning 1475-1500 at 65. At 65 or less it would work.

 

Thanks for replying. I'm looking at this truck and thinking would it be a good truck to take otr. I didn't kno Detroit engines had Rockwell tranny

 

Do u have a freightliner? What make/model?