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Part throttle downshift not available with 440 and 426 #1476130 07/29/13 08:32 PM 07/29/13 08:32 PM
Joined: Jan 2003 Posts: 338 Montreal Quebec STROKIE OP enthusiast
STROKIE OP enthusiast Joined: Jan 2003 Posts: 338 Montreal Quebec	Just reading Shift Linkage Adjustment Guide, and I would like to know why Part throttle downshift was not available with 440 and 426 Hemi options... 7794785-Ptk.jpg (73 downloads)

Re: Part throttle downshift not available with 440 and 426 [Re: STROKIE] #1476131 07/29/13 10:11 PM 07/29/13 10:11 PM
Joined: Jun 2008 Posts: 3,916 usa L lewtot184 master
lewtot184 master L Joined: Jun 2008 Posts: 3,916 usa	i don't think chrysler went to part throttle downshift until the early seventies. just put an early seventies valve body in it and your good to go.

Re: Part throttle downshift not available with 440 and 426 [Re: lewtot184] #1476132 07/29/13 10:15 PM 07/29/13 10:15 PM
Joined: Sep 2007 Posts: 14,889 up yours Supercuda About to go away
Supercuda About to go away Joined: Sep 2007 Posts: 14,889 up yours	part throttle downshift was done to compensate for lack of torque. You think the 440 or Hemi had that problem? They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.

Re: Part throttle downshift not available with 440 and 426 [Re: Supercuda] #1476133 07/30/13 08:33 AM 07/30/13 08:33 AM
Joined: Jan 2003 Posts: 338 Montreal Quebec STROKIE OP enthusiast
STROKIE OP enthusiast Joined: Jan 2003 Posts: 338 Montreal Quebec	Thanks... I'm gone skip the idea to add a PTK on my 451cid.

Re: Part throttle downshift not available with 440 and 426 [Re: lewtot184] #1476134 07/30/13 10:33 AM 07/30/13 10:33 AM
Joined: Jan 2003 Posts: 74,976 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,976 U.S.S.A.	Quote: i don't think chrysler went to part throttle downshift until the early seventies. just put an early seventies valve body in it and your good to go. This , I'm pretty sure PTK didn't show up till 1971 ...

Re: Part throttle downshift not available with 440 and 426 [Re: JohnRR] #1476135 07/30/13 11:08 AM 07/30/13 11:08 AM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	IMHO,with a 451 you will know when you need to manualy pull it to 2nd gear and shift back to 3rd.

Re: Part throttle downshift not available with 440 and 426 [Re: Supercuda] #1476136 07/30/13 11:28 AM 07/30/13 11:28 AM
Joined: Jan 2003 Posts: 3,575 The Netherlands BigBlockMopar master
BigBlockMopar master Joined: Jan 2003 Posts: 3,575 The Netherlands	Quote: part throttle downshift was done to compensate for lack of torque. You think the 440 or Hemi had that problem? Personally I find it very annoying when an engine keeps working against a transmission hanging in 3rd gear when doing 10-15 mph orso. BigBlockMopar.com

Re: Part throttle downshift not available with 440 and 426 [Re: BigBlockMopar] #1476137 07/30/13 11:39 AM 07/30/13 11:39 AM
A Anonymous Unregistered
Anonymous Unregistered A	Even more annoying was driving a Hemi Charger back in the day and getting beaten by a small block from a 35 mph roll because your tranny won't go into low gear above 30 mph no matter what you do. Manual/automatic valve body fixed that. Not sure what years had that problem, but I know the 67's and 68's did.

Re: Part throttle downshift not available with 440 and 426 [Re: JohnRR] #1476138 07/30/13 02:58 PM 07/30/13 02:58 PM
Joined: Jan 2003 Posts: 25,748 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,748 Rio Linda, CA	Quote: This , I'm pretty sure PTK didn't show up till 1971 ... '71 for the V8 but the /6 had it as far back as '67. The factory thinking was that the 440HP and Hemi were never geared as high as the standard performance models and didn't need PTK. When the V8 PTK was introduced, the 440 and Hemi didn't get it but in later years the 440 did get it. The INTERNET, the MISinformation superhighway

Re: Part throttle downshift not available with 440 and 426 [Re: John_Kunkel] #1476139 07/30/13 03:28 PM 07/30/13 03:28 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	And the valve bodies interchange, right? So a PTK body will fit in any Torqueflite, right? Making it easy to retrofit? R.

Re: Part throttle downshift not available with 440 and 426 [Re: dogdays] #1476140 07/30/13 04:59 PM 07/30/13 04:59 PM
Joined: Jan 2003 Posts: 1,069 Washington State 70Duster440 super stock
70Duster440 super stock Joined: Jan 2003 Posts: 1,069 Washington State	You can add a PTK "module" to your valve body of the same era. I've done it.

Re: Part throttle downshift not available with 440 and 426 [Re: 70Duster440] #1476141 07/30/13 05:18 PM 07/30/13 05:18 PM
Joined: Jan 2003 Posts: 74,976 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 74,976 U.S.S.A.	Quote: You can add a PTK "module" to your valve body of the same era. I've done it. Correct

Re: Part throttle downshift not available with 440 and 426 [Re: dogdays] #1476142 07/30/13 07:07 PM 07/30/13 07:07 PM
Joined: Jun 2008 Posts: 3,916 usa L lewtot184 master
lewtot184 master L Joined: Jun 2008 Posts: 3,916 usa	Quote: And the valve bodies interchange, right? So a PTK body will fit in any Torqueflite, right? Making it easy to retrofit? R. i've used PTK valve bodies in a '69 tranny with no issues.

Re: Part throttle downshift not available with 440 and 426 [Re: dogdays] #1476143 07/30/13 07:30 PM 07/30/13 07:30 PM
Joined: Jan 2003 Posts: 25,748 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,748 Rio Linda, CA	Quote: And the valve bodies interchange, right? So a PTK body will fit in any Torqueflite, right? Making it easy to retrofit? Nope, the VB has to be '67 or later. The earlier VB's lack the throttle pressure sense port. 7795804-vbend2.JPG (77 downloads)

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