55-59 TCI under cab brake booster - The 1947 - Present Chevrolet & GMC Truck Message Board Network

amerskier · 01-19-2018, 04:55 PM

Looking to see if any of you have installed this unit on your trucks and if you had an alignment issue with the original hole in the firewall for the pedal. Mine is roughly an inch and a half off center to the outboard side of the hole.

amerskier · 01-19-2018, 05:03 PM

Picture of unit

jkmhb · 01-19-2018, 05:38 PM

I bought mine off ebay, did not say TCI brand, but fits perfectly.

sack54 · 01-19-2018, 06:00 PM

I had a problem like yours, but not 1 1/2 only a half . I ended up leaving the adapter piece off that goes to pedal . Used a large washer for shim to center arm hole . Then used the original hole in the arm, and made connection, Works great ! Also shimmed ,with washers behind the mount plate

amerskier · 01-19-2018, 06:51 PM

Thanks for the reply. Not sure why it is so far away from center. I could work with half inch but inch and a half means completely rebuilding the arm. Checked cab being squared up to frame.

sack54 · 01-19-2018, 07:33 PM

Do you have the stock brake pedal arm. it should be the same, you could try it should fit

sack54 · 01-19-2018, 07:49 PM

You could make a spacer and mount the unit to the spacer .
Some nice thick round stock and a plate and stiffener arm from the inside bolt on the boaster to the frame. this will make it stay ridged while applying the brakes.

amerskier · 01-19-2018, 09:06 PM

sack54 unfortunately I do not have the stock pedal or the original master cylinder. The original mounting bracket that was riveted to the frame was gone so I was lucky enough to get one from a member on the site. Pretty sure it was from a 57 truck so it should be the same as my 56.

sack54 · 01-20-2018, 05:12 PM

I will measure my mount for you my truck is a 56 GMC

amerskier · 01-20-2018, 05:59 PM

Sack54 thanks that would be great!

sack54 · 01-21-2018, 05:19 PM

Checked it out today for you, from the frame out measures 3 7/8 to top of mount

amerskier · 01-22-2018, 02:33 PM

Sack54...Thanks for taking the time to measure for me.

01-19-2018, 04:55 PM	#1
amerskier Registered User Join Date: Apr 2016 Location: Wenatchee Wa Posts: 10	55-59 TCI under cab brake booster Looking to see if any of you have installed this unit on your trucks and if you had an alignment issue with the original hole in the firewall for the pedal. Mine is roughly an inch and a half off center to the outboard side of the hole.

01-19-2018, 05:03 PM	#2
amerskier Registered User Join Date: Apr 2016 Location: Wenatchee Wa Posts: 10	Re: 55-59 TCI under cab brake booster Picture of unit Attached Images

01-19-2018, 05:38 PM	#3
jkmhb Registered User Join Date: Sep 2015 Location: Flower Mound, TX Posts: 42	Re: 55-59 TCI under cab brake booster I bought mine off ebay, did not say TCI brand, but fits perfectly. __________________ 1958 Chevy Short Fleetside - 350 Stealth Ram FI/700R4/Old Air 1965 Corvette Convertible 350/Richmond 5-speed

01-19-2018, 06:00 PM	#4
sack54 Registered User Join Date: Dec 2017 Location: Londonderry NH. Posts: 138	Re: 55-59 TCI under cab brake booster I had a problem like yours, but not 1 1/2 only a half . I ended up leaving the adapter piece off that goes to pedal . Used a large washer for shim to center arm hole . Then used the original hole in the arm, and made connection, Works great ! Also shimmed ,with washers behind the mount plate

01-19-2018, 06:51 PM	#5
amerskier Registered User Join Date: Apr 2016 Location: Wenatchee Wa Posts: 10	Re: 55-59 TCI under cab brake booster Thanks for the reply. Not sure why it is so far away from center. I could work with half inch but inch and a half means completely rebuilding the arm. Checked cab being squared up to frame.

01-19-2018, 07:33 PM	#6
sack54 Registered User Join Date: Dec 2017 Location: Londonderry NH. Posts: 138	Re: 55-59 TCI under cab brake booster Do you have the stock brake pedal arm. it should be the same, you could try it should fit

01-19-2018, 07:49 PM	#7
sack54 Registered User Join Date: Dec 2017 Location: Londonderry NH. Posts: 138	Re: 55-59 TCI under cab brake booster You could make a spacer and mount the unit to the spacer . Some nice thick round stock and a plate and stiffener arm from the inside bolt on the boaster to the frame. this will make it stay ridged while applying the brakes.

01-19-2018, 09:06 PM	#8
amerskier Registered User Join Date: Apr 2016 Location: Wenatchee Wa Posts: 10	Re: 55-59 TCI under cab brake booster sack54 unfortunately I do not have the stock pedal or the original master cylinder. The original mounting bracket that was riveted to the frame was gone so I was lucky enough to get one from a member on the site. Pretty sure it was from a 57 truck so it should be the same as my 56.

01-20-2018, 05:12 PM	#9
sack54 Registered User Join Date: Dec 2017 Location: Londonderry NH. Posts: 138	Re: 55-59 TCI under cab brake booster I will measure my mount for you my truck is a 56 GMC

01-20-2018, 05:59 PM	#10
amerskier Registered User Join Date: Apr 2016 Location: Wenatchee Wa Posts: 10	Re: 55-59 TCI under cab brake booster Sack54 thanks that would be great!

01-21-2018, 05:19 PM	#11
sack54 Registered User Join Date: Dec 2017 Location: Londonderry NH. Posts: 138	Re: 55-59 TCI under cab brake booster Checked it out today for you, from the frame out measures 3 7/8 to top of mount

01-22-2018, 02:33 PM	#12
amerskier Registered User Join Date: Apr 2016 Location: Wenatchee Wa Posts: 10	Re: 55-59 TCI under cab brake booster Sack54...Thanks for taking the time to measure for me.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.