Subject: [TR] TR6 rear brake cylinder shims--question

From: "Tim Gaines" <[email-masked]>
Date: Thu, 06 Aug 2026 19:39:27 +0000

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I have recently finished installation of the RATCO cross member that 
serves as the rear diff support and the mounting plate for the lever 
shocks. The project was long and a bit tedious, but I am very happy with 
the result. However, when I was reassembling the hubs to the aluminum 
trailing arms I found that a couple of the six studs on each TA had 
stripped the holes or their own threads when the studs came out with the 
nyloc nuts. I decided to use the Patton-Machine TARK-KS guide kit for 
drilling and tapping the trailing arms for Keenserts. That went 
extremely well, and I now feel confident that the hubs (and wheels!) are 
securely mounted to the new studs that are in turn secure in the 
Keenserts.

Today I thought I was going to simply adjust the brakes, so I got out my 
official shop manual to refresh my memory. Now I feel pretty foolish, so 
I am going to have to ask for help. The diagram of the brake cylinder 
shim sequence in the manual does not agree with the instructions. I am 
pretty sure that the instructions are right and my earlier installation 
based on the diagram and a Google AI query is wrong, but I would like 
some corroboration.

The manual says:
1) The thin spring(y) shim with 2 tabs at the open end slides into the 
cylinder's groove first, from the front side (where the hand brake lever 
is), against the back of the backplate with the tabs pointing out.
2) The thicker flat locking shim slides in from the opposite direction 
until the tabs from the spring shim fit into the slots in the locking 
shim.
3) The shorter flat spacing shim slides in from the front on top of the 
other shims. Somehow I have misplaced one of these shims--another 
problem to deal with!

Is that correct? I had reversed the first two shims.

If anyone has an interest in or questions about the the RATCO 
installation or the Patton-Machine kit, I would be happy to provide 
details.

Tim

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<body>I have recently finished installation of the RATCO cross member that =
serves as the rear diff support and the mounting plate for the lever shocks=
=2E The project was long and a bit tedious, but I am very happy with the re=
sult. However, when I was reassembling the hubs to the aluminum trailing ar=
ms I found that a couple of the six studs on each TA had stripped the holes=
 or their own threads when the studs came out with the nyloc nuts. I decide=
d to use the Patton-Machine TARK-KS guide kit for drilling and tapping the =
trailing arms for Keenserts. That went extremely well, and I now feel confi=
dent that the hubs (and wheels!) are securely mounted to the new studs that=
 are in turn secure in the Keenserts.<div><br /></div><div>Today I thought =
I was going to simply adjust the brakes, so I got out my official shop manu=
al to refresh my memory. Now I feel pretty foolish, so I am going to have t=
o ask for help. The diagram of the brake cylinder shim sequence in the manu=
al does not agree with the instructions. I am pretty sure that the instruct=
ions are right and my earlier installation based on the diagram and a Googl=
e AI query is wrong, but I would like some corroboration.=C2=A0<div><br /><=
/div><div>The manual says:</div><div>1) The thin spring(y) shim with 2 tabs=
 at the open end slides into the cylinder's groove first, from the front si=
de (where the hand brake lever is), against the back of the backplate with =
the tabs pointing out.</div><div>2) The thicker flat locking shim slides in=
 from the opposite direction until the tabs from the spring shim fit into t=
he slots in the locking shim.</div><div>3) The shorter flat spacing shim sl=
ides in from the front on top of the other shims. Somehow I have misplaced =
one of these shims--another problem to deal with!=C2=A0</div><div><br /></d=
iv><div>Is that correct? I had reversed the first two shims.</div><div><spa=
n>=C2=A0</span></div><div><span>If anyone has an interest in or questions a=
bout the the RATCO installation or the Patton-Machine kit, I would be happy=
 to provide details.</span></div><div><span><br /></span></div><div>Tim</di=
v></div><div id=3D"DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br /><table style=
=3D"border-top: 1px solid #D3D4DE;"><tr><td style=3D"width: 55px; padding-t=
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width: 470px; padding-top: 12px; color: #41424e; font-size: 13px; font-fami=
ly: Arial, Helvetica, sans-serif; line-height: 18px;">Virus-free.<a href=3D=
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