Car falls on it face at 70mph

USCGunner

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Jun 10, 2017

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Jul 10, 2018

#1

• Jul 10, 2018

• #1

My 91 5.0 auto trans has great pickup until I hit 70 mph then it falls flat on it face. Any suggestions I have replace plugs, wires, cap and rotor. Stock motor only mod is a cold air intake.

 

a91what

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Jul 10, 2018

#2

• Jul 10, 2018

• #2

USCGunner said:

My 91 5.0 auto trans has great pickup until I hit 70 mph then it falls flat on it face. Any suggestions I have replace plugs, wires, cap and rotor. Stock motor only mod is a cold air intake.

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Is it shifting into overdrive when it falls flat? If you leave it in drive (not overdrive) so it stays in 3rd does it still fall flat?

 

USCGunner

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Jun 10, 2017

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Idaho

Jul 10, 2018

#3

• Jul 10, 2018

• #3

It was in Od I will try it in D and see if it still does it. Thanks

 

a91what

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#4

• Jul 10, 2018

• #4

If it does the kickdown cable may need adjusting. Jrichker has a write up on this procedure I believe

 

jrichker

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Jul 10, 2018

#5

• Jul 10, 2018

• #5

a91what said:

If it does the kickdown cable may need adjusting. Jrichker has a write up on this procedure I believe

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That's one thing that I don't have... I have successfully avoided AOD and AODE of all flavors...

 

Reactions: FastDriver and General karthief

General karthief

wonder how much it would cost to ship you a pair

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Jul 10, 2018

#6

• Jul 10, 2018

• #6

Are we talking looses power or just will not go any faster? What are you rpms at 70mph?

 

Mustang5L5

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Jul 11, 2018

#7

• Jul 11, 2018

• #7

Stock 2.73's (or optional 3.27's) That thing should pull pretty well up to 130MPH or so.

OD won't engage at WOT. So once you finish with 3rd gear, you can only proceed to 4th(OD) if you let off the gas and proceed at partial throttle.