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aod tranny question

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Old 09-12-2006, 06:49 PM
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OneFine89Mustang
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Default aod tranny question

i have 4.10 gears with the aod..my question is can i drive the car on the highway for about 90 miles in drive becuase my overdrive is screwed up...without hurting the motor
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Old 09-12-2006, 06:52 PM
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samseed101
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Default RE: aod tranny question

You'll be fine. You just won't be able to go as fast. Use this calculator here to find out exactly what your RPMs will be in 3rd gear in the AOD tranny.
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Old 09-12-2006, 06:53 PM
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Default RE: aod tranny question

If you have the stock wheels, you will be at about 4,000 RPM at 75 MPH and 3,500 RPM at 65 MPH.
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Old 09-12-2006, 06:58 PM
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88BlueGT
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Default RE: aod tranny question

its a little stressful on the motor but gas will be HORRRRRRRRRRIBLE.
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Old 09-12-2006, 07:00 PM
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Default RE: aod tranny question

ORIGINAL: samseed101

You'll be fine. You just won't be able to go as fast. Use this calculator here to find out exactly what your RPMs will be in 3rd gear in the AOD tranny.
Which one of those is for an AOD? Yesterday I was going going just over 65mph and was sitting at about 2200rpm.
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Old 09-12-2006, 07:11 PM
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7upedition
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Default RE: aod tranny question

use the t5 with 5th gear almost same about 100-200 rpms off
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Old 09-12-2006, 07:49 PM
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Default RE: aod tranny question


ORIGINAL: BlackLX

ORIGINAL: samseed101

You'll be fine. You just won't be able to go as fast. Use this calculator here to find out exactly what your RPMs will be in 3rd gear in the AOD tranny.
Which one of those is for an AOD? Yesterday I was going going just over 65mph and was sitting at about 2200rpm.
4R70W is the tranny.

Keep in mind that there are many factors you have to consider. First, the numbers I quoted were for stock tires. If your tires are larger or smaller (in circumference) then the nubers will change. Also, if you have 4.10s then chances are your speed is going to be off anyway. Even if you got a correction gear It's still most likely going to be off. Finally, the stock tach has been known to have issues. Although it's probably accurate enough in your car, it wouldn't matter much because your speedo itself is going to be off due to the gears, the tires, or both.
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Old 09-12-2006, 07:55 PM
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Default RE: aod tranny question

By the way..there is no way you could have been going 65 MPH at 2200 RPM in 3rd hear with 4.10s. so something has to be waaaayy off here. Well, not unless you had a tire diameter of 40 inches instead of 26 or so inches.

If you were in Overdrive, then with your tires and gears you would be going pretty damned close to 65 MPH at 2200 RPM though (61 MPH.) That's close enough when you factor in slight errors in reading the tach, the accuracy of the tach, etc. Are you sure your OD bakd is gone?
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Old 09-12-2006, 07:59 PM
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OneFine89Mustang
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Default RE: aod tranny question

i have on the back 275/50/15 bf goodrich tires on the back and 195/60/15 on the front
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Old 09-12-2006, 08:11 PM
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Default RE: aod tranny question

Okay, so your tire diameter is basically stock...very minor difference but not much. Just plug in the rear tire size along with the 4R70W tranny and the calculator should be right on the money for you.
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