Technical Advice July 2005

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Calculating the Tooth count for the Driven Speedo Gear.

Posted On: July 30, 2005

Cooler Return Line Chart

TRANSMISSION                                                 LOCATION

GM

…TTT………………………………………………………………………………………………………………………………………………………………………………………………...

ALUM. P.G……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….  TOP LINE

ST-300 ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………  TOP LINE

THM 125 ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………<  TOP LINE

THM 180…………<…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..  REAR LINE

THM 200………….…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..  BOTTOM LINE

THM 200-4R………….……………………………………………………………………………………………………………………………………………………………………………………………………………………..  BOTTOM LINE

THM 325………….…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..  TOP LINE

THM 325-4L………….……………………………………………………………………………………………………………………………………………………………………………………………………………………..  TOP LINE

THM 350………….…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..  TOP LINE

THM 400………….…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..  TOP LINE

THM 425………….……………………………………………………………………………………………………………………………………………………..OUTER LINE FARTHEST FROM THE CONVERTER

THM 440-T4………….……………………………………………………………………………………………………………………………………………………………………………………………………………………..  TOP LINE

THM 700-R4………….……………………………………………………………………………………………………………………………………………………………………………………………………………………..  TOP LINE

FORD

A4LD………….………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………...  TOP LINE

AOD………….…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….  BOTTOM LINE

ATX…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………..  PUMP END

AXOD……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………...  BOTTOM LINE

C3………….……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………...  REAR LINE

C4/C5………….………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………...  REAR LINE

C6………….…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………  REAR LINE

E4OD………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….  REAR LINE

FMX………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….. REAR LINE

CHRYSLER

404………….……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………... TOP LINE

A-500………….……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………. REAR LINE

A-604…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………. FRONT LINE

KM170………………………………………………………………………………………………………………………………………………………………………………………………OUTER LINE FARTHEST FROM THE DIFFERENTIAL

TF-6………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….. REAR LINE

TF-8………….…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….. REAR LINE

 

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Calculating the Tooth count for the Driven Speedo Gear.

Posted On: July 30, 2005

Very often it becomes necessary to recalibrate the speedometer after changes are made to the rear axle ratio or rear tire size.  Sometimes this can be accomplished by simply changing the ddriven gear at the end of the speedo cable thatss inserted into the transmission.  Before this gear can be changed the correct tooth count must be confirmed based on the changes made. 

In order to determine the tooth count for the "driven" gear it is also necessary to know (or find out) the exact tooth count on the ddrive gear located on the output shaft of the transmission.  Some transmissions use drive gears that have 1 or 2 different tooth counts.  This can be found by removal of the transmissionss tail-housing, or simply finding out what the standard OEM tooth count is.  Once that information is available using the provided tooth-count calculator for the driven gear is an easy task.

Keep in mind, that very often only a limited number of driven gears are available for specific transmissions.  Sometimes it becomes necessary to use a gear with the closest available count.    

To access our Tooth-count Calculator use the link provided (Above).  

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Calculating Engine RPM at various driving speeds.

Posted On: July 30, 2005

Over the years many of our customers have asked us to calculate an engine's RPM at various driving speeds (MPH).  Sometimes they've changed a transmission, a rear axle ratio, or even tire size.  All of these things will effect what an engine's rpm will be at a given vehicle speed.  In order to make this information more readily available and convenient for our customers to find, we have developed an on-line RPM calculator that will accurately provide this information.  It's also set up so that you can easily input and make changes to any of these parameters and get immediate results.

To access our RPM Calculator use the link provided (Above).  

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