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Re: Downshift kickdown 727. [Re: John_Kunkel] #1366290 01/09/13 05:57 PM 01/09/13 05:57 PM
Joined: Jan 2003 Posts: 5,443 Indiana Y YO7_A66 master
YO7_A66 master Y Joined: Jan 2003 Posts: 5,443 Indiana	I have thought about manually dropping it from 3-2 but never had the guts to do it at a WOT stab in the fear that it would rev too high too quick. This is why I was looking to be able to modify the auto kick-down feature to keep it safe. Thanks 1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)

Re: Downshift kickdown 727. [Re: YO7_A66] #1366291 01/09/13 06:25 PM 01/09/13 06:25 PM
Joined: Jan 2003 Posts: 338 Montreal Quebec STROKIE OP enthusiast
STROKIE OP enthusiast Joined: Jan 2003 Posts: 338 Montreal Quebec	Quote: I have thought about manually dropping it from 3-2 but never had the guts to do it at a WOT stab in the fear that it would rev too high too quick. This is why I was looking to be able to modify the auto kick-down feature to keep it safe. Thanks May be if we use the 426 governor and the 3.23 axle ratio you can have 3 to 2 downshift from 70 to 84 mph as per the shop manual. Will be our target... 7540179-7538810-Shiftspeeds.jpg (44 downloads)

Re: Downshift kickdown 727. [Re: 383man] #1366292 01/09/13 06:31 PM 01/09/13 06:31 PM
Joined: Jan 2003 Posts: 25,791 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,791 Rio Linda, CA	Quote: John might know what trannys have a "limit valve". The limit valve is for PTK only on the '71 and later. What limits WOT 3-2 kickdown is the combination of axle ratio and governor. The INTERNET, the MISinformation superhighway

Re: Downshift kickdown 727. [Re: STROKIE] #1366293 01/09/13 07:27 PM 01/09/13 07:27 PM
Joined: Jan 2003 Posts: 5,443 Indiana Y YO7_A66 master
YO7_A66 master Y Joined: Jan 2003 Posts: 5,443 Indiana	My problem is that I want to keep my 3:91's, so I will have to do something with the governor assembly. I have already emailed A&A to see what my governor options might be for this. Note: My valve body has been upgraded with the 71 & later PTK. Thanks 1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)

Re: Downshift kickdown 727. [Re: YO7_A66] #1366294 01/10/13 03:21 PM 01/10/13 03:21 PM
Joined: Jan 2003 Posts: 25,791 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,791 Rio Linda, CA	If the '71-later PTK module is installed on a pre-'71 VB the limit valve won't function. The INTERNET, the MISinformation superhighway

Re: Downshift kickdown 727. [Re: John_Kunkel] #1366295 01/10/13 03:39 PM 01/10/13 03:39 PM
Joined: Jan 2003 Posts: 5,443 Indiana Y YO7_A66 master
YO7_A66 master Y Joined: Jan 2003 Posts: 5,443 Indiana	I should have wrote that my valve body is a 71 or later model with the PTK. 1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)

Re: Downshift kickdown 727. [Re: STROKIE] #1366296 01/10/13 07:57 PM 01/10/13 07:57 PM
Joined: Jan 2003 Posts: 338 Montreal Quebec STROKIE OP enthusiast
STROKIE OP enthusiast Joined: Jan 2003 Posts: 338 Montreal Quebec	Quote: Quote: I have thought about manually dropping it from 3-2 but never had the guts to do it at a WOT stab in the fear that it would rev too high too quick. This is why I was looking to be able to modify the auto kick-down feature to keep it safe. Thanks May be if we use the 426 governor and the 3.23 axle ratio you can have 3 to 2 downshift from 70 to 84 mph as per the shop manual. Will be our target... I would like to know how Chrysler can downshift the Torqueflite 727 3-2 downshift with 3.23 axle ratio from 70-84mph (I prefer 84 mph.) many Moparts fan will be happy. John kunkel may know... 7541619-7540179-7538810-Shiftspeeds.jpg (39 downloads)

Re: Downshift kickdown 727. [Re: STROKIE] #1366297 01/10/13 08:14 PM 01/10/13 08:14 PM
Joined: Jan 2003 Posts: 25,791 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,791 Rio Linda, CA	Once again, it's all about the governor and the axle ratio. A trans with a Hemi governor and and 3.91 gears might not 3-2 kickdown above 70 mph while the exact same trans with 3.23's might still kickdown at 84 mph. The governor only knows the rpm of the output shaft, not the road speed of the car. 84 mph in 2nd gear with 3.23 gears is around 5000 engine rpm, within the limits of the Hemi governor. The INTERNET, the MISinformation superhighway

Re: Downshift kickdown 727. [Re: John_Kunkel] #1366298 01/11/13 10:19 AM 01/11/13 10:19 AM
Joined: Jan 2003 Posts: 338 Montreal Quebec STROKIE OP enthusiast
STROKIE OP enthusiast Joined: Jan 2003 Posts: 338 Montreal Quebec	Quote: Once again, it's all about the governor and the axle ratio. A trans with a Hemi governor and and 3.91 gears might not 3-2 kickdown above 70 mph while the exact same trans with 3.23's might still kickdown at 84 mph. The governor only knows the rpm of the output shaft, not the road speed of the car. 84 mph in 2nd gear with 3.23 gears is around 5000 engine rpm, within the limits of the Hemi governor. A&A transmissions sell many Governor Kits from 5000 to 6000+ rpm... They have 2 different Hemi governor kit 5400 & 5600 rpm. As per shop manual Wide Open Throttle 2-3 Upshift with 3.23 Axle Ratio can be at 93 Mph must equal to around 5800 rpm. Logically I must order the 5800 Rpm Max Wedge governor kit to upshit at 93 mph and kickdown at 3-2 kickdown at 84 mph.

Re: Downshift kickdown 727. [Re: STROKIE] #1366299 01/11/13 05:45 PM 01/11/13 05:45 PM
Joined: Feb 2003 Posts: 10,208 Someplace you aren't S SomeCarGuy I Live Here
SomeCarGuy I Live Here S Joined: Feb 2003 Posts: 10,208 Someplace you aren't	Might tire size account for the ranges that are given on MPH with the various gear sets? I want my fair share

Re: Downshift kickdown 727. [Re: SomeCarGuy] #1366300 01/11/13 07:50 PM 01/11/13 07:50 PM
Joined: Jan 2003 Posts: 338 Montreal Quebec STROKIE OP enthusiast
STROKIE OP enthusiast Joined: Jan 2003 Posts: 338 Montreal Quebec	Quote: Might tire size account for the ranges that are given on MPH with the various gear sets? A&A transmissions sell many Governor Kits from 5000 to 6000+ rpm... They have 2 different Hemi governor kit 5400 & 5600 rpm. As per shop manual Wide Open Throttle 2-3 Upshift with 3.23 Axle WITH 26 INCHES TIRES. Ratio can be at 93 Mph must equal to around 5800 rpm. Logically I must order the 5800 Rpm Max Wedge governor kit to upshit at 93 mph and kickdown at 3-2 kickdown at 84 mph.

Re: Downshift kickdown 727. [Re: STROKIE] #1366301 01/11/13 08:41 PM 01/11/13 08:41 PM
Joined: Jan 2003 Posts: 25,791 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,791 Rio Linda, CA	Hemi cars traditionally had 15" tires which were closer to 27" in diameter. The INTERNET, the MISinformation superhighway

Re: Downshift kickdown 727. [Re: John_Kunkel] #1366302 01/12/13 10:29 AM 01/12/13 10:29 AM
Joined: Jan 2003 Posts: 338 Montreal Quebec STROKIE OP enthusiast
STROKIE OP enthusiast Joined: Jan 2003 Posts: 338 Montreal Quebec	Quote: Hemi cars traditionally had 15" tires which were closer to 27" in diameter. My car is a Dodge Charger 1967 as per the shop manual Hemi cars are fitted with 7.75-14 can be close to 27" in diameter.

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