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Author Topic: Transmission shifting wrong after carb spacer install  (Read 1193 times)

Offline benracing123

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Transmission shifting wrong after carb spacer install
« on: January 27, 2023, 11:14:51 AM »
I installed a 4 barrel carb spacer trying to boost my cfms a drop, however now my transmission shifts at 3k rpm under partial throttle, anyone have any idea h I could be


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Offline zieg85

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Re: Transmission shifting wrong after carb spacer install
« Reply #1 on: January 27, 2023, 01:07:54 PM »
I am going to assume you have a 700R4 transmission.  You changed the geometry of the TV Cable.  That needs re-adjusted.
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Offline benracing123

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Re: Transmission shifting wrong after carb spacer install
« Reply #2 on: January 27, 2023, 04:09:02 PM »
Quote from: zieg85 on January 27, 2023, 01:07:54 PM
I am going to assume you have a 700R4 transmission.  You changed the geometry of the TV Cable.  That needs re-adjusted.
It is
I don’t exactly know what the tv cable is but I’ll find it


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Offline benracing123

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Re: Transmission shifting wrong after carb spacer install
« Reply #3 on: January 27, 2023, 05:44:48 PM »
Quote from: zieg85 on January 27, 2023, 01:07:54 PM
I am going to assume you have a 700R4 transmission.  You changed the geometry of the TV Cable.  That needs re-adjusted.
I only have 1 cable to my carb linkage and it’s my throttle


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Offline benracing123

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Re: Transmission shifting wrong after carb spacer install
« Reply #4 on: January 27, 2023, 05:51:15 PM »

Isn’t there supposed to be another cable next to the return springs?


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Offline VileZambonie

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Re: Transmission shifting wrong after carb spacer install
« Reply #5 on: January 27, 2023, 06:21:43 PM »
Show us a picture of what transmission you have. If there's no cable it's a TH400
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Offline PapaDG

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Re: Transmission shifting wrong after carb spacer install
« Reply #6 on: January 27, 2023, 07:04:30 PM »
There should be a button to press behind the metal bracket on that black cable on top. You’ll have to test drive it once you adjust it and make adjustments as necessary so it doesn’t throw through all gears immediately.
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Offline bd

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Re: Transmission shifting wrong after carb spacer install
« Reply #7 on: January 27, 2023, 07:22:40 PM »
Quote from: VileZambonie on January 27, 2023, 06:21:43 PM
Show us a picture of what transmission you have. If there's no cable it's a TH400

This ^^^^.

Also, when you installed the spacer, did you unplug any vacuum lines and neglect to reconnect them?
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Offline JohnnyPopper

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Re: Transmission shifting wrong after carb spacer install
« Reply #8 on: January 27, 2023, 07:30:26 PM »
I'm more interested in the spacer  ;)

What's the theory?
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1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
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Offline VileZambonie

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Re: Transmission shifting wrong after carb spacer install
« Reply #9 on: January 28, 2023, 08:02:02 AM »
Quote from: JohnnyPopper on January 27, 2023, 07:30:26 PM
I'm more interested in the spacer  ;)

What's the theory?

50 horsepower man. Now put magnets on your fuel line for another 10-20 mpg!
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Online Shifty

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Re: Transmission shifting wrong after carb spacer install
« Reply #10 on: January 28, 2023, 09:01:36 AM »
Quote from: VileZambonie on January 28, 2023, 08:02:02 AM
Quote from: JohnnyPopper on January 27, 2023, 07:30:26 PM
I'm more interested in the spacer  ;)

What's the theory?

50 horsepower man. Now put magnets on your fuel line for another 10-20 mpg!
And stickers....don't forget stickers....
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87 R30 3+3 Longbed (days of yore)

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Offline JohnnyPopper

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Re: Transmission shifting wrong after carb spacer install
« Reply #11 on: January 28, 2023, 04:50:34 PM »
Hey Ben, I think we've been diss'd hard  :(
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1957 Apache 3100 235 Inline 6, 3 on the tree
1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction
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