[TR] TR4A IRS Suspension Question

Wed Mar 24 12:25:38 MDT 2021

Good idea.  Thanks. 

> On Mar 24, 2021, at 1:48 PM, Brian K <bk13 at earthlink.net> wrote:
> 
> 
> Simple test on the rear shock conversion - disconnect one end of the shock and slide it out of the way. Roll the car a little with the shock out of the way then measure again. Don't drive this way.
> 
> Like other replies, I would not expect the tube shocks to provide lift.
> 
> Brian
> 
> On Mar 24, 2021 4:37 AM, Jim Henningsen <trguy75 at gmail.com> wrote:
> Great thoughts and much appreciated.  I believe the higher rear height is from the steel brackets used in the tube shock conversion kit, but I could be wrong.   Let me drive it some more and get it loosened up and then measure again and also include measuring floor to frame on each corner.  I need to do something as it doesn’t quite look right visually either and a TR has to look right when it sits.  In my opinion.  Thanks
> Jim
> 
> > On Mar 23, 2021, at 9:17 PM, Michael Marr <mmarr at albiontechnical.com> wrote:
> > 
> > Another thought.  On my TR3A, there is a spacer on one of the rear springs that, effectively, increases the unloaded ride height on the driver's side to account for the fact that the car is driven driver-only most of the time.  Does the same situation exist with the 4A?  Is one rear spring longer than the other to provide the ride height difference?  Have you tried measuring the ride height with someone (an adult, preferably) in the driver's seat?
> > 
> > Mike
> > 
> > Michael J Marr, P.E., CEng.
> > Albion Technical Services
> > W5918 Hackbarth Rd
> > Fort Atkinson, WI 53538
> > 
> > Cell:  630-202-0065
> > Email:  mmarr at albiontechnical.com
> > 
> > -----Original Message-----
> > From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of Michael Marr
> > Sent: Tuesday, March 23, 2021 8:03 PM
> > To: Jim Henningsen <trguy75 at gmail.com>; triumphs at autox.team.net
> > Subject: Re: [TR] TR4A IRS Suspension Question
> > 
> > Have you driven the car?  A few road miles will help the suspension settle.  There's a lot of "stiction" in those new components.
> > 
> > Also, I agree with Jim Kirby - the new shocks will not affect ride height, unless, for some reason, they have bottomed out and are bound up.
> > 
> > Mike
> > 
> > Michael J Marr, P.E., CEng.
> > Albion Technical Services
> > W5918 Hackbarth Rd
> > Fort Atkinson, WI 53538
> > 
> > Cell:  630-202-0065
> > Email:  mmarr at albiontechnical.com
> > 
> > -----Original Message-----
> > From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of Jim Henningsen
> > Sent: Tuesday, March 23, 2021 7:06 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
> > 
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