[TR] TR4A IRS Suspension Question

Sujit Roy triumphstag at gmail.com
Wed Mar 24 20:22:11 MDT 2021


Can the engine rotation cause one side to lean more. I've heard that about
Stags

On Wed, Mar 24, 2021, 7:14 PM David Brady <dmb993 at earthlink.net> wrote:

> When you figure this out, please let us know. I've had the same question
> about my TR250. In my case the steer and drive axles on the right hand side
> are quarter inch or so higher than the left. Correct or not, I attribute
> this to these cars being setup as RHD and Triumph tweaking the right side
> slightly higher to attribute for pilot weight. Of course, this doesn't help
> things on this side of the pond.
>
> David Brady
> '68 TR250
> CD8124L
>
> -----Original Message-----
> >From: Jim Henningsen <trguy75 at gmail.com>
> >Sent: Mar 23, 2021 8:06 PM
> >To: triumphs at autox.team.net
> >Subject: [TR] TR4A IRS Suspension Question
> >
> >Ok, just finished redoing front and rear suspension on my 67 4A IRS.
> >Complete disassembly, clean, repaint, new urethane bushings, tie rod ends,
> >trunnions, etc.  New comp springs ( 1 inch lower) all corners, new stock
> >tubes shocks up front and new KYB gas shocks on the tube shock conversion
> >brackets for the IRS.  Reinstalled all alignment shims as installed as the
> >car drove pretty straight.  Urethane packings on springs.
> >
> >After completing, I noticed that all four corners have a slightly
> different
> >ride height when measured from garage floor to bottom on fender lip at
> >center of each wheel.  Left front: 26 3/4 inches, Right front: 26 1/4,
> Left
> >rear: 27 3/8, right rear: 27 7/8.  I think the higher rear height is
> coming
> >from the tube shock conversion as it was lower with the levers.    So
> about
> >a half inch off each side.   I don't recall having this issue when I redid
> >my TR6, but that was a while ago.   Rears also have stock trailing arm
> >brackets (one and two notch brackets on each side - believe these are
> >original from new given history of the car).
> >
> >Looking for help on next steps before bringing it in for an alignment.
> Will
> >alignment correct height difference or do I need to add 1/2 inch spacers
> on
> >lower sides.  I am going to put uprated valved levers back on rear to
> >eliminate the extra height in rear.
> >
> >Any help appreciated.
> >
> >Thanks
> >Jim Henningsen
> >Ocala FL
> >Too many TRs to maintain!
> >61 3A
> >62 4
> >67 4A
> >75 6
> >81 8
> >
> >** triumphs at autox.team.net **
> >
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