Torqshift 5R110 using all 6 gears/ Video - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 4 (permalink) Old 02-20-2015, 08:34 AM Thread Starter
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Torqshift 5R110 using all 6 gears/ Video

Not all in a row mind you! But, yes, I got it to drop into 4th gear.

The video shows normal shift pattern 1-2-3-5-6. then I was able to kick down to 4th on WOT.

Torqshift 5R110 Shifting into 4th - YouTube


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post #2 of 4 (permalink) Old 02-23-2015, 05:40 AM
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Re: Torqshift 5R110 using all 6 gears/ Video

I just don't understand why Ford builds a 6spd and decided that only using 5 gears was a good idea.

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post #3 of 4 (permalink) Old 02-23-2015, 02:15 PM
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Re: Torqshift 5R110 using all 6 gears/ Video

First, you need to understand how the TorqShift was built. It is a two speed transmission in front of a three speed transmission.

You can get six ratios by combining the two times three ratios. The problem is that two of the ratios are nearly identical.

The two speed has ratios of 1:1 and 0.71:1.
The three speed has ratios of 3.1:1, 1.54:1, and 1:1.

By combining them you get:
3.1:1
2.2:1
1.54:1
1.09:1
1:1
0.71:1

The 1:1 and 1.09:1 ratios are nearly the same. Less than a 10% change in RPM during a shift is useless. The customer (YOU!) would interpret this as a problem and take it in to get fixed.

It was done this way to save money. It was much less expensive to design the trans like this than to design and build a true six speed. Later that was done and was called the 6R140.

Mark
Former Ford Automatic Transmission Engineer

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post #4 of 4 (permalink) Old 02-23-2015, 03:30 PM
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Re: Torqshift 5R110 using all 6 gears/ Video

It's still a work of art imo

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