tranny help??
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Junior User
Joined: Jan 2010
Posts: 73
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From: wisconsin
tranny help??
i have a 2000 ford f250, recently noticed my MPG is really bad, was looking into a 4r100 to 5r110 swap cause i knew it had more gears, started reading and found people saying that the 4r100 has 4 gears plus overdrive, making that 5 shifts total. is this true or am i miss reading things????
thanks
thanks
Lead Driver
Joined: Jan 2006
Posts: 7,308
Likes: 250
From: Hartford, WI
i have a 2000 ford f250, recently noticed my MPG is really bad, was looking into a 4r100 to 5r110 swap cause i knew it had more gears, started reading and found people saying that the 4r100 has 4 gears plus overdrive, making that 5 shifts total. is this true or am i miss reading things????
thanks
thanks
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
The transmissions have different bell housing patterns, and VERY different electronics to make them shift.
You'd be much better-off trying to change the trans to a ZF-6 handshaker than a 5R110.
Pop
You'd be much better-off trying to change the trans to a ZF-6 handshaker than a 5R110.
Pop
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
I don't think you can install a 5r100 in a 7.3 truck, the programming is not compatable.
What are you using the truck for? Hot shot delivery pulling a trailer or something?
Need info. What gear ratio are you running, etc.
What are you using the truck for? Hot shot delivery pulling a trailer or something?
Need info. What gear ratio are you running, etc.
Thread Starter
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Junior User
Joined: Jan 2010
Posts: 73
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From: wisconsin
more hot rod, 3.73 rear end, 35" tires. my 4r100 shifts 4 times and im in overdrive at 40 mph (my chip lowered shift point) without the chip i **** at 45 but i get 12 mpg.
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Fleet Owner
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From: Rio Rico, AZ.
Big tires will always kill mileage.
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Lead Driver
Joined: Jan 2006
Posts: 7,308
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From: Hartford, WI
4r100 gear ratios:
1st - 2.71
2nd - 1.54
3rd - 1.0
4th - .71
5r110 gear ratios:
1st - 3.11
2nd - 2.2
3rd - 1.54
4th - 1.0
5th - .71
So swapping from a 4r100 to a 5r110 will do absolutely nothing to change the downshift RPM's out of top gear. Basically 2nd, 3rd and 4th gears in the 4r100 are identical ratios to 3rd, 4th, and 5th in the 5r110.
1st - 2.71
2nd - 1.54
3rd - 1.0
4th - .71
5r110 gear ratios:
1st - 3.11
2nd - 2.2
3rd - 1.54
4th - 1.0
5th - .71
So swapping from a 4r100 to a 5r110 will do absolutely nothing to change the downshift RPM's out of top gear. Basically 2nd, 3rd and 4th gears in the 4r100 are identical ratios to 3rd, 4th, and 5th in the 5r110.
Thread Starter
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Junior User
Joined: Jan 2010
Posts: 73
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From: wisconsin
ok i saw that post to thats why i decided to post on here. so really the question and it seems the answer is that my 2000 ford has 3 shifts 4 gears. i did see that the excursion in 2003 had a auto 5 speed.
Lead Driver
Joined: Jan 2006
Posts: 7,308
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From: Hartford, WI
I think the Excursion you are looking at would be say a 6.0 excursion
Lead Driver
Joined: Jan 2006
Posts: 7,308
Likes: 250
From: Hartford, WI
In 03, there were 2 Powerstrokes, be it the truck or SUV. The early 03 units were still 7.3 and the later ones were 6.0
Thread Starter
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Junior User
Joined: Jan 2010
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From: wisconsin
it might be the torque converter, but than why doesnt mine work? if the torque convert wasnt working would my MPG be lower than normal?