allison experts!! pull in high1st or 3rd low to help the c1 clutch

[Dragbear]

Efi live has been promising but still waiting

 

[Harbin_22]

If your OS won't support the A40, switch to one that will when you go pulling. I have been running an A40 in place of my A50 for 3 years with no problems.

 

[durallymax]

By lower I assume you mean slower?


The "basic" answer to what I think the OP is asking would be "protecting" C1 with a 2.72:1 reduction ratio. Or am I lost?


And the next question for the OP, since I know roughly where you are from. Who built the trans and with whos parts?

In theory it should be giving the trans a mechanical advantage. Much like running planetaries allows a weaker lighter center section, and trans. The engine is doing the same work but where the stress is applied is moved around.

I could be wrong partially and don't know enough to say it will reduce the load on the C1s but I can only assume it's advantageous as pulling in low range has worked better for most.

3rd low is a shorter/lower ratio in gear slang. Gear slang is opposite of what is numerically/physically happening with the gears. Taller gears means faster gears which are generally physically shorter. I think the term comes from the gear being faster at a certain rpm. Could even be as stupid as taller people get more per stride just like a faster ratio goes further per input revolution. Lower/Higher is not as cut and dry. Some use lower the same as shorter others use it to describe a numerically lower ratio, others use it to talk about a slower ratio.

It's all confusing.

Bottom line. The overall ratio in 3rd low is slower than 1st high.

1st High: 3.10x1.00 = 3.10:1

3rd Low: 1.41x2.72= 3.83:1

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[1pieceatatime]

In theory it should be giving the trans a mechanical advantage. Much like running planetaries allows a weaker lighter center section, and trans. The engine is doing the same work but where the stress is applied is moved around.

I could be wrong partially and don't know enough to say it will reduce the load on the C1s but I can only assume it's advantageous as pulling in low range has worked better for most.

3rd low is a shorter/lower ratio in gear slang. Gear slang is opposite of what is numerically/physically happening with the gears. Taller gears means faster gears which are generally physically shorter. I think the term comes from the gear being faster at a certain rpm. Could even be as stupid as taller people get more per stride just like a faster ratio goes further per input revolution. Lower/Higher is not as cut and dry. Some use lower the same as shorter others use it to describe a numerically lower ratio, others use it to talk about a slower ratio.

It's all confusing.

Bottom line. The overall ratio in 3rd low is slower than 1st high.

1st High: 3.10x1.00 = 3.10:1

3rd Low: 1.41x2.72= 3.83:1

Sent from my SCH-R970 using Tapatalk

I understand final drive ratios, gear selection, the planetary ratio in the T-case etc. Thats not confusing IMHO. I just don't know enough about the allison itself to know what clutch packs make up what gears.

I also realized that when I asked about about 3rd being slower, I should have clarified and asked if that takes into consideration the converter not locking when he pulls 1st high.

 

[Dragbear]

I have talked to Danville and Fleece and they both say the same. The A40 may or may not work on my truck.
I have one all programed with 3rd gear start and when I swap it with my A50 the truck does crazy things.
I am chopping wires tomorrow.

 

[1pieceatatime]

I have talked to Danville and Fleece and they both say the same. The A40 may or may not work on my truck.
I have one all programed with 3rd gear start and when I swap it with my A50 the truck does crazy things.
I am chopping wires tomorrow.

There has got to be a better way than chopping wires.

Sent from my DROID RAZR HD using Tapatalk

 

[durallymax]

I understand final drive ratios, gear selection, the planetary ratio in the T-case etc. Thats not confusing IMHO. I just don't know enough about the allison itself to know what clutch packs make up what gears.

I also realized that when I asked about about 3rd being slower, I should have clarified and asked if that takes into consideration the converter not locking when he pulls 1st high.

C5 is on in reverse neutral and 1st. C1is on 1st through 4th. 2nd uses c4, 3rd uses c3, 4th uses c2, 5th switch to c2+c3, 6th uses c2+c4 if my memory serves me correct

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