4R70W Auto in to a fox..

93 LX

Founding Member

Jun 2, 2000

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Norwalk, CA.

Mar 17, 2009

#1

• Mar 17, 2009

• #1

Just read an article about replacing the 5R55S transmission with a 4R70W. The reason is the tq that this tranny can hold and the fact it has clutch packs instead of bands.

Now I have a 86 with a AOD and I was looking for something better than the AOD. I am not going to boost this 5.0 but convert it to MAF with a Cobra intake, E cam and World Products Iron heads. So with this known and the weakness of the AOD, also the fact this 4R70W is a common tranny so finding one wouldnt be hard.

The problem comes from the Electronic portion of this tranny. Can it be converted to non-computer or can a computer be installed in the fox..

Anyone?....

 

BlownFiveLiter

have car, will race....wait, it doesn't run

15 Year Member

Nov 29, 1999

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Chicagoland

Mar 18, 2009

#2

• Mar 18, 2009

• #2

You could pick up something like a Baumann trans controller to run it. If you pick one up, make sure you find one from a V6 car, so the bellhousing bolt pattern is the same. Here's some info on it: Tranny Swap

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

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Mar 18, 2009

#3

• Mar 18, 2009

• #3

I'd simply get an AOD built.

Otherwise, talk to Mansonozz if you desire. He put a 4R in his Fox III and it was not a simple endeavor as I recall.

 

white 89 GT

Member

Apr 3, 2003

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Tacoma

Mar 18, 2009

#4

• Mar 18, 2009

• #4

I would just build the AOD, and use most of the guts from the 4r70w.
Oh and they both have "A" band, its just that the 4r uses the 2" and the AOD uses the 1.5" its a good upgrade for the aod.

 

93 LX

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Jun 2, 2000

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Norwalk, CA.

Mar 18, 2009

#5

• Mar 18, 2009

• #5

white 89 GT said:

I would just build the AOD, and use most of the guts from the 4r70w.
Oh and they both have "A" band, its just that the 4r uses the 2" and the AOD uses the 1.5" its a good upgrade for the aod.

Click to expand...

Then why does the article in April 09 Muscle Mustang and Fast Fords state that the 4R uses clutch packs like the TH400 but they are larger. It uses them in the 2-3 and 3-4 transisions....????

 

L

lang williams

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Jun 11, 2003

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cleveland, oh

Mar 18, 2009

#6

• Mar 18, 2009

• #6

you might find some good info on Click Click Racing the mod there builds some very nice aods too.

 

white 89 GT

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Tacoma

Mar 18, 2009

#7

• Mar 18, 2009

• #7

93 LX said:

Then why does the article in Feb 09 Muscle Mustang and Fast Fords state that the 4R uses clutch packs like the TH400 but they are larger. It uses them in the 2-3 and 3-4 transisions....????

Click to expand...

I dont care what some magazine says, the 4r has a band for the o/d (3-4) shift just like the AOD. The 4r is nothing more than an updated AOD and has elec shift solnoid.
I have put a few together to know, just put all the updated 4r stuff in the AOD case and go racing with that new low gear.

 

93 LX

Founding Member

Jun 2, 2000

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Norwalk, CA.

Mar 18, 2009

#8

• Mar 18, 2009

• #8

white 89 GT said:

I dont care what some magazine says, the 4r has a band for the o/d (3-4) shift just like the AOD. The 4r is nothing more than an updated AOD and has elec shift solnoid.
I have put a few together to know, just put all the updated 4r stuff in the AOD case and go racing with that new low gear.

Click to expand...

Anyplace where i can read about this upgrade?

 

white 89 GT

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Apr 3, 2003

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Tacoma

Mar 18, 2009

#9

• Mar 18, 2009

• #9

Yup, General Click Click Tech - Click Click Racing Forums
Its all easy chit. You will find the sticky AOD-4rw gearset install.

 

S

Speeds8erM-1

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Pensacola Florida

Mar 22, 2009

#10

• Mar 22, 2009

• #10

You can put a manual valve body in it. My friend's turbo 95 GT had a 4R70W out of a 3.8 with a Lentech manual valve body, modified drums to hold more clutches, trans brake, worked good in that car. 530+ rwhp, 614 rwtq, 3700ish race weight, no issues with the tranny. Also he locked the converter in third, picked it up some mph at the track and made it sail on the top side on the street.