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Adding part-throttle kickdown to earlier VB? #199000 01/20/09 03:51 PM 01/20/09 03:51 PM
Joined: Jan 2003 Posts: 1,069 Washington State 70Duster440 OP super stock
70Duster440 OP super stock Joined: Jan 2003 Posts: 1,069 Washington State	I've got a '68 727 with TF2 kit. Converter stalls at about 2500-2800. Shifts fine. Full-throttle kickdown works fine. At slow speeds, under a load (such as turning up an incline) it stays in 3rd and essentially becomes a dog unless I mash the throttle or manually downshift. Is it possible to add part-throttle kickdown without changing the VB? This guy promises an amazing transformation with a mod that costs as much as a new VB: http://www.brauerengineering.com/trans/index.htm

Re: Adding part-throttle kickdown to earlier VB? [Re: 70Duster440] #199001 01/20/09 04:56 PM 01/20/09 04:56 PM
Joined: Jan 2003 Posts: 25,750 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,750 Rio Linda, CA	PTK can be added to any '67 or later 727/904 VB, just replace the cover plate with the PTK module. When installing the early version of the PTK one screw must be changed to a thinner head to clear the casting. 4961144-Thinscrew2.JPG (303 downloads)

Re: Adding part-throttle kickdown to earlier VB? [Re: John_Kunkel] #199002 01/20/09 05:11 PM 01/20/09 05:11 PM
Joined: Jan 2003 Posts: 1,069 Washington State 70Duster440 OP super stock
70Duster440 OP super stock Joined: Jan 2003 Posts: 1,069 Washington State	Cool - thanks, John. I've got a later VB I can steal the PTK parts from. Is it also true that if you decrease the space between the kickdown valve and the throttle pressure cam that it will downshift at a higher "closed throttle" condition? If so, is this a good or bad thing?

Re: Adding part-throttle kickdown to earlier VB? [Re: 70Duster440] #199003 01/21/09 08:37 PM 01/21/09 08:37 PM
Joined: Oct 2005 Posts: 1,305 Lakewood, Colorado herkamer pro stock
herkamer pro stock Joined: Oct 2005 Posts: 1,305 Lakewood, Colorado	Erik's valve bodies are quite amazing. Have one in everything I own that is TF equipped except for one. He's a little hard to get ahold of these days but if you can, it's well worth it. His mods are completely different than any off the shelf kit as he epoxies certain passages to make the VB do what he wants. Can't wait till I can get him out to do the last one! Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more

Re: Adding part-throttle kickdown to earlier VB? [Re: 70Duster440] #199004 01/22/09 01:14 PM 01/22/09 01:14 PM
Joined: Apr 2003 Posts: 1,286 Ft. Lauderdale, FL solarguy pro stock
solarguy pro stock Joined: Apr 2003 Posts: 1,286 Ft. Lauderdale, FL	Quote: I've got a '68 727 with TF2 kit. Converter stalls at about 2500-2800. Shifts fine. Full-throttle kickdown works fine. I'm confused here. Is there a Part throttle kickdown AND a Full throttle kickdown or are they one and the same?? I'm asking because I recently changed to a higher stall converter and while shift points are good, kickdown doesn't come in exactly where I want it since rpm is a little higher. linkage adjusted to get great shift points up come down a little late. before converter swap, kickdown came in at a better point thanks

Re: Adding part-throttle kickdown to earlier VB? [Re: solarguy] #199005 01/22/09 01:20 PM 01/22/09 01:20 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: I'm confused here. Is there a Part throttle kickdown AND a Full throttle kickdown or are they one and the same?? thanks different EDIT the full throttle KD would come from the kickdown lever moved all(or most of the way)back at full throttle & part throttle KB would come about from the right combo of valves/springs or the addition of the cover that Kunkel showed. Last edited by RapidRobert; 01/22/09 01:29 PM.

Re: Adding part-throttle kickdown to earlier VB? [Re: RapidRobert] #199006 01/22/09 01:32 PM 01/22/09 01:32 PM
Joined: Apr 2003 Posts: 1,286 Ft. Lauderdale, FL solarguy pro stock
solarguy pro stock Joined: Apr 2003 Posts: 1,286 Ft. Lauderdale, FL	So let me guess Robert, if I have to floor it to downshift from 3 to 2, that would be FULL throttle kickdown? Part throttle would just require less than full throttle deployment? If thats the case, I'm going looking for a differnt valve body.

Re: Adding part-throttle kickdown to earlier VB? [Re: solarguy] #199007 01/22/09 01:34 PM 01/22/09 01:34 PM
Joined: Apr 2003 Posts: 1,286 Ft. Lauderdale, FL solarguy pro stock
solarguy pro stock Joined: Apr 2003 Posts: 1,286 Ft. Lauderdale, FL	posted after your edit, gotcha

Re: Adding part-throttle kickdown to earlier VB? [Re: solarguy] #199008 01/22/09 03:42 PM 01/22/09 03:42 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: I'm going looking for a differnt valve body. You might consult with someone about modifying the valve/springs in your current VB. You wouldn't want to buy another one & have it not give you what you want for the PTK to be lower live every 24 hour block of time like it's your last day on earth

Re: Adding part-throttle kickdown to earlier VB? [Re: 70Duster440] #199009 01/22/09 10:51 PM 01/22/09 10:51 PM
Joined: Nov 2006 Posts: 203 Taneytown, MD B bigslant6fan enthusiast
bigslant6fan enthusiast B Joined: Nov 2006 Posts: 203 Taneytown, MD	Mopar action aug 1998 had an article on this.I have both 68-70,and 70-up PTKs,PM if interested

Re: Adding part-throttle kickdown to earlier VB? [Re: RapidRobert] #199010 01/23/09 04:49 PM 01/23/09 04:49 PM
Joined: Jan 2003 Posts: 25,750 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,750 Rio Linda, CA	The early PTK like the one pictured in my original reply has no limit valve, depending on the axle ratio the PTK can occur at some pretty high road speeds and this can be annoying. My '57 NY with 2.94 gears will still PTK at 60 mph. The '71 and later PTK module contains a limit valve and spring to limit the PTK to below 40 mph but the limit function won't work when retrofitting the '71 and later module to the earlier VB. The only way to get the limit feature in an earlier trans is to swap in the entire VB. The INTERNET, the MISinformation superhighway

Re: Adding part-throttle kickdown to earlier VB? [Re: John_Kunkel] #199011 01/23/09 07:56 PM 01/23/09 07:56 PM
Joined: Jan 2003 Posts: 1,069 Washington State 70Duster440 OP super stock
70Duster440 OP super stock Joined: Jan 2003 Posts: 1,069 Washington State	So John, which PTK module below would be best for a '68 VB? I have an old lockup VB that has the upper one that I was going to steal. Also, is it true that if you decrease the space between the kickdown valve and the throttle pressure cam that it will downshift at a higher "closed throttle" condition? If so, is this a good or bad thing? 4968541-PTKs.jpg (206 downloads)

Re: Adding part-throttle kickdown to earlier VB? [Re: 70Duster440] #199012 01/23/09 08:23 PM 01/23/09 08:23 PM
Joined: Apr 2003 Posts: 1,286 Ft. Lauderdale, FL solarguy pro stock
solarguy pro stock Joined: Apr 2003 Posts: 1,286 Ft. Lauderdale, FL	70Duster440, do you have a part number and source for those prepackaged modules? Thanks Last edited by solarguy; 01/23/09 08:49 PM.

Re: Adding part-throttle kickdown to earlier VB? [Re: 70Duster440] #199013 01/23/09 08:49 PM 01/23/09 08:49 PM
Joined: Jan 2003 Posts: 5,443 Indiana Y YO7_A66 master
YO7_A66 master Y Joined: Jan 2003 Posts: 5,443 Indiana	"Also, is it true that if you decrease the space between the kickdown valve and the throttle pressure cam that it will downshift at a higher "closed throttle" condition?"" Bump 1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)

Re: Adding part-throttle kickdown to earlier VB? [Re: 70Duster440] #199014 01/23/09 08:53 PM 01/23/09 08:53 PM
Joined: Jan 2003 Posts: 25,750 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,750 Rio Linda, CA	Quote: So John, which PTK module below would be best for a '68 VB? I have an old lockup VB that has the upper one that I was going to steal. The lower one, the limit valve won't function in a '68. Quote: Also, is it true that if you decrease the space between the kickdown valve and the throttle pressure cam that it will downshift at a higher "closed throttle" condition? If so, is this a good or bad thing? Not unless you make it real tight. There is no advantage. The INTERNET, the MISinformation superhighway

Re: Adding part-throttle kickdown to earlier VB? [Re: solarguy] #199015 01/23/09 09:47 PM 01/23/09 09:47 PM
Joined: Jan 2003 Posts: 1,069 Washington State 70Duster440 OP super stock
70Duster440 OP super stock Joined: Jan 2003 Posts: 1,069 Washington State	Quote: 70Duster440, do you have a part number and source for those prepackaged modules? Thanks Sorry, I don't. Sounds like bigslant6fan (above) might though.

Re: Adding part-throttle kickdown to earlier VB? [Re: solarguy] #199016 01/23/09 11:15 PM 01/23/09 11:15 PM
Joined: Feb 2005 Posts: 4,311 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,311 Prospect, PA	Quote: 70Duster440, do you have a part number and source for those prepackaged modules? Thanks http://www.aandatrans.com/Products/727-3-2-Kick-Down-Module-(1966-69)__22740-32SI.aspx

Re: Adding part-throttle kickdown to earlier VB? [Re: BSB67] #199017 01/24/09 09:14 AM 01/24/09 09:14 AM
Joined: Apr 2003 Posts: 1,286 Ft. Lauderdale, FL solarguy pro stock
solarguy pro stock Joined: Apr 2003 Posts: 1,286 Ft. Lauderdale, FL	Thanks for that link, I had seeen that one but was actually looking for the later model one with the limit valve.

Re: Adding part-throttle kickdown to earlier VB? [Re: 70Duster440] #199018 01/24/09 03:52 PM 01/24/09 03:52 PM
Joined: Nov 2006 Posts: 203 Taneytown, MD B bigslant6fan enthusiast
bigslant6fan enthusiast B Joined: Nov 2006 Posts: 203 Taneytown, MD	Quote: Quote: 70Duster440, do you have a part number and source for those prepackaged modules? Thanks Sorry, I don't. Sounds like bigslant6fan (above) might though. sorry I don,t,all mine are used,and the square type doesn,t even have any casting nos.

Re: Adding part-throttle kickdown to earlier VB? [Re: solarguy] #199019 01/24/09 05:32 PM 01/24/09 05:32 PM
Joined: Jan 2003 Posts: 25,750 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,750 Rio Linda, CA	E-bay vendor T'Flite Patty usually has the PTK modules available. http://stores.ebay.com/TFlite-Pattys-Shop-Mart Let me repeat, the limit valve won't function when retrofit to a pre-'71 valve body. The INTERNET, the MISinformation superhighway

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