Part Throttle Kick Down ?
#3216979
02/29/24 09:17 AM
02/29/24 09:17 AM
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Joined: Nov 2013
Posts: 19
Ohio
rustytoolss
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OP
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Joined: Nov 2013
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Ohio
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Can the 1971 style part throttle Kick Down unit be install on a 1967/68 Valve Body ? I don't want to replace the current VB ( I put a simple shift kit in it not long ago ). Has anyone used the early style slant 6 PTKD ? which type works better for a low powered 318 driver with 3.23 gears ? Just learned about the early style PTKD, can't find much information about them.
Last edited by rustytoolss; 02/29/24 11:17 AM. Reason: more info
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Re: Part Throttle Kick Down ?
[Re: rustytoolss]
#3216993
02/29/24 10:34 AM
02/29/24 10:34 AM
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U.S.S.A.
JohnRR
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.... Can't give an accurate answer now that you made major change to your post ...
Last edited by JohnRR; 02/29/24 07:10 PM.
running up my post count some more .
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Re: Part Throttle Kick Down ?
[Re: rustytoolss]
#3217100
02/29/24 05:04 PM
02/29/24 05:04 PM
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Someplace you aren't
SomeCarGuy
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You can get a slant 6 one. My trans guy had one on the shelf for thirty years that he gave me and put in the last trans he did for me before he retired. Said he knew it would come up one day, I was literally the last one he did as I didn’t know he was already done and he did several for me over the years.
A and A sells a version, it’s about a hundred bucks. I just got one last month for when I get a chance to drop the vb on my current car. I appreciate Rick making these available as finding an old slant one would be a task.
I want my fair share
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Re: Part Throttle Kick Down ?
[Re: rustytoolss]
#3217454
03/02/24 01:37 PM
03/02/24 01:37 PM
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Rio Linda, CA
John_Kunkel
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Either the late or early PTK module will work on a '67-'68 VB. Difference is the '71-later has a limit valve that won't be operational on a pre-'71 so both will work the same.
The INTERNET, the MISinformation superhighway
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Re: Part Throttle Kick Down ?
[Re: moparx]
#3217515
03/02/24 04:40 PM
03/02/24 04:40 PM
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Rio Linda, CA
John_Kunkel
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what does the limit valve do ?  It limits PTK to about 40 mph. Earlier PTK had no limit, it would sometimes still PTK at 60 mph. The '71-later module needs to sense throttle pressure and there is no sense port in the pre-'71 VB.
The INTERNET, the MISinformation superhighway
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Re: Part Throttle Kick Down ?
[Re: John_Kunkel]
#3217606
03/02/24 11:58 PM
03/02/24 11:58 PM
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Omaha Ne
TJP
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what does the limit valve do ? It limits PTK to about 40 mph. Earlier PTK had no limit, it would sometimes still PTK at 60 mph. The '71-later module needs to sense throttle pressure and there is no sense port in the pre-'71 VB. How does gear ratio affect that? I'm running 4:10's but find the need for a PTK around town.
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Re: Part Throttle Kick Down ?
[Re: John_Kunkel]
#3217689
03/03/24 11:55 AM
03/03/24 11:55 AM
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moparx
"Butt Crack Bob"
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"Butt Crack Bob"
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what does the limit valve do ? It limits PTK to about 40 mph. Earlier PTK had no limit, it would sometimes still PTK at 60 mph. The '71-later module needs to sense throttle pressure and there is no sense port in the pre-'71 VB. thanks for the info on this. i never paid attention to the speed the PTK kicked in on all the vehicles i have had over all these years. just shows an "old dog" can learn "new" tricks. [provided he pays attention.  ]
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Re: Part Throttle Kick Down ?
[Re: TJP]
#3217715
03/03/24 01:09 PM
03/03/24 01:09 PM
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Joined: Jan 2003
Posts: 25,750
Rio Linda, CA
John_Kunkel
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Rio Linda, CA
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what does the limit valve do ? It limits PTK to about 40 mph. Earlier PTK had no limit, it would sometimes still PTK at 60 mph. The '71-later module needs to sense throttle pressure and there is no sense port in the pre-'71 VB. How does gear ratio affect that? I'm running 4:10's but find the need for a PTK around town. Having another senior moment...the later PTK limit valve senses governor pressure, not throttle pressure. So, if the governor is correct for the axle ratio, the mph limit will be about the same.
The INTERNET, the MISinformation superhighway
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Re: Part Throttle Kick Down ?
[Re: John_Kunkel]
#3217898
03/03/24 11:31 PM
03/03/24 11:31 PM
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Joined: Jan 2003
Posts: 15,315
Omaha Ne
TJP
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I Live Here
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Omaha Ne
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what does the limit valve do ? It limits PTK to about 40 mph. Earlier PTK had no limit, it would sometimes still PTK at 60 mph. The '71-later module needs to sense throttle pressure and there is no sense port in the pre-'71 VB. How does gear ratio affect that? I'm running 4:10's but find the need for a PTK around town. Having another senior moment...the later PTK limit valve senses governor pressure, not throttle pressure. So, if the governor is correct for the axle ratio, the mph limit will be about the same. Thanks John, No changes were done to the governor nor do I remember where the trans originated from (40 years ago  ) Tf-2 kit with a good rebuild. with that limited info any idea what one could expect?
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