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Rear Subframe Rebuild


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#1 m445

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Posted 08 January 2021 - 03:52 AM

Here are some before pictures:

LH Side:

6HpU7xam.png?1

Radius Arm:

FL47CRum.png

Trunnions:

4r2QmT1m.png

RH Side (suspension & radius arm removed):

zVA2hlgm.png

 



#2 m445

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Posted 08 January 2021 - 03:54 AM

Chapter 2

- Remove of rear cones, radius arms, trunnions, brakes, hubs - DONE

- Remove of fuel lines and tank - Done

- Remove rear brake lines - Done

- Remove rear exhaust box - Done

- Remove rear subframe - Done

 

The trunnion bolts did not give too much fight.  Lots of PB blaster soaking and not broken bolts.  Here is picture of subframe after removal:

GjpghuQm.jpg  MhdIP66m.jpg

 

 



#3 m445

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Posted 08 January 2021 - 03:57 AM

Chapter 3:

I got the subframe back from sandblaster today:

ATYcJhqm.jpg bVoufoNm.jpg

xPcySE2m.jpg Ig4wA60m.jpg

NisBntdm.jpg q2EE5fcm.jpg

The transformation was incredible.  This thing looks new!

Next Step:  Priming and painting...
 


Edited by m445, 08 January 2021 - 03:57 AM.


#4 m445

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Posted 10 January 2021 - 12:28 AM

It needed some sanding after the sandblasting.  The surface was very rough.  I used 220 grit then 600 grit.

F6g9iJ9m.jpg  7KjO8FKm.jpg

cvNM5Sxm.jpg

 



#5 PiG

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Posted 10 January 2021 - 11:32 AM

Nice work, been doing ours too front and rear.

 

I'm being lazy and getting them powder coated though!



#6 cal844

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Posted 10 January 2021 - 07:08 PM

When I sandblast anything it gets a few coats of paint then flatted with 600 grit paper.

The sandblast is a good enough key to apply primer directly.

#7 m445

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Posted 23 January 2021 - 06:36 AM

Painting Completed with Eastwood Chassis Black (Satin)

b2SWz38.jpg  DI9sKTX.jpg

9cYlXgz.jpg  T3YnEeM.jpg

 

 

 

 



#8 m445

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Posted 23 January 2021 - 06:44 AM

I have some questions about trunnion mountings:

1) Which direction for larger rubber bushing. Large shoulder toward subframe side (like in picure).

QWU3CB9.jpg rVCOi0S.jpg

2) Trunnion bolted into boot floor.  Which side with long bolt?  Like this?

ECLSLO1.jpg

3) What is torque setting for nut holding bushings?  How much to squeeze the bushings?

 



#9 m445

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Posted 30 January 2021 - 02:45 PM

Installation did not go well.  One of the new trunnions from Minispares would not fit!  See picture (new trunnion on top, old trunnion on bottom). 

sEheC4w.jpg

Hole would not line up with body.  I needed to re-use the old trunnion.

 

Also, I needed to heavily tighten the rubber bushings in order to compress back trunnions to fit.  What is the torque setting for trunnion bushing bolts?  Is this amount on compression normal?

RadvGO0.jpg


Edited by m445, 30 January 2021 - 02:47 PM.


#10 sonscar

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Posted 30 January 2021 - 08:37 PM

Is the pin not shouldered so the washer sets the compression?Steve..

#11 mini-mad-mark

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Posted 30 January 2021 - 09:15 PM

I was going to say that but in a different way - basically tighten nut until the washer hits the shoulder but if you're inexperienced/lack "feel", as there is no specific torque setting it might not be clear when you've hit the shoulder and if you keep raunching it up you may shear the thread off



#12 m445

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Posted 29 March 2021 - 04:04 AM

Here is the completed subframe before installation:

 

 

YIG9ekE.jpg?2

ieD2RWt.jpg?1

2WQ5wuV.jpg?1

Covered over holes on bottom and side with foil tape (painted black).  I hope this will prevent some water getting inside the frame.

fSofl5g.jpg?1

 

I finished the installation.  Will post more pictures soon.


Edited by m445, 29 March 2021 - 04:18 AM.


#13 sclemow

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Posted 30 March 2021 - 04:10 PM

That bolt in the new trunnion looks at a very odd angle in the picture - has the hole been drilled correctly?

 

Looks like a nice job!



#14 Tremelune

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Posted 12 April 2021 - 08:50 PM

...Let's not gloss over those Mini Spares trunnions. Are they good parts or what??



#15 m445

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Posted 15 April 2021 - 09:43 PM

I received refund from Mini Spares for the bad trunnion.  I cleaned up the old trunnion and new paint.  Works just fine.






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