[Fot] TR-4 vertical link and trunnion

[MARKANDGLENDA PENDERGRASS]

Some vertical links were purposely bent on early cars to get neg. camber,
mine being one of those. The lower wishbones were also bent to some degree
and i to have TR6 componants, do i agree with this practice?........not
really.....and i do keep a real close eye on those componants.
Mark '63 TR4

On Tue, Aug 21, 2012 at 7:17 AM, Charly Mitchel
<charly at mitchelplumbing.com>wrote:

> BTW, when you do find some vertical links, check them for straightness.
> I've got several bent ones, it appears the right side is almost always
> bent. If they're bent, they'll bind up when rotated.  This can be difficult
> to check if not on the car.  When I rebuild my suspension,I assemble the
> upper and lower joints with the vertical without a spring  and then rotate
> it and go through the suspension range to check it.
>
> Charly
> ----- Original Message ----- From: "Tony Drews" <tony at tonydrews.com>
> To: "Charly Mitchel" <charly at mitchelplumbing.com>; "MadMarx" <
> tr4racing at googlemail.com>; <fot at autox.team.net>
> Sent: Monday, August 20, 2012 4:06 PM
>
> Subject: Re: [Fot] TR-4 vertical link and trunnion
>
>
>  Do you have a sense of how much "offset" there is at the outboard end of
>> the A-arms?  That would make up for the lowered pivot in the trunnion - at
>> least partially.
>>
>> Also, someone mentioned to me that the stub axle may have been moved up
>> on the TR-6 upright (which would lower the car).  Can anyone confirm / deny
>> this?
>>
>> It would be awesome to have the parts side by side for comparison - both
>> upright / vertical link and trunnion / lower A-arm combination.
>>
>> Alternately, a few measurements from a TR-4A / TR-6 front suspension may
>> help:
>> On vertical link from bottom of upper ball joint mount to center line of
>> spindle
>> From center line of spindle to spring pan
>>
>> That should give me a good feel for how much (if any) the TR-6 setup
>> would lower the car.
>>
>> Tony
>>
>> At 11:17 AM 8/20/2012, Charly Mitchel wrote:
>>
>>> It depends on which way you install the arms,  offsets up or offsets
>>> down. My suspension had spacers to lower it and I flipped the lower a-arms
>>> and removed the spacers and remained the same height.
>>> Charly
>>> ----- Original Message ----- From: "Tony Drews" <tony at tonydrews.com>
>>> To: "Charly Mitchel" <charly at mitchelplumbing.com>; "MadMarx" <
>>> tr4racing at googlemail.com>; <fot at autox.team.net>
>>> Sent: Monday, August 20, 2012 8:52 AM
>>> Subject: Re: [Fot] TR-4 vertical link and trunnion
>>>
>>>
>>>  THAT's it.  Left hand thread / Right hand thread.  Thanks.
>>>>
>>>> OK, next question - If I switch from TR-4 to TR-4a (or TR-6) lower A
>>>> arms, does that undo the lowering effect of the later trunnions?  My car is
>>>> low enough already, and messing with spring spacers doesn't sound like any
>>>> fun at all.  I've got two weekends before the next race to get this done.
>>>>  It sounds like the later A-arms are a direct bolt on for the earlier car
>>>> with the welded in lower frame pivots.  It may also eliminate the need for
>>>> the reaming and spacers.  It would probably also eliminate the additional
>>>> camber gain - not sure that's a plus, but everything else would be a
>>>> positive.
>>>>
>>>> Joe, your TR-250 front end is getting more attractive as we go along...
>>>> :)
>>>>
>>>> Tony
>>>>
>>>> At 10:41 AM 8/20/2012, Charly Mitchel wrote:
>>>>
>>>>> My guess is the are L&R handed to keep from mixing them up.  The
>>>>> trunnion has the castor built into them and if you tried to reverse them
>>>>> the wheel would have opposite castor.  The threads on them are also L&R
>>>>> handed and can only be assembled as a set L&R.
>>>>> Charly
>>>>> ----- Original Message ----- From: "Tony Drews" <tony at tonydrews.com>
>>>>> To: "MadMarx" <tr4racing at googlemail.com>; <fot at autox.team.net>
>>>>> Sent: Monday, August 20, 2012 8:33 AM
>>>>> Subject: Re: [Fot] TR-4 vertical link and trunnion
>>>>>
>>>>>
>>>>>  I'm looking at a diagram of the TR-4 and TR-4a
>>>>>> front suspension.  On the 4A, the vertical link
>>>>>> is different for Left Hand side of the car and
>>>>>> Right Hand side of the car while on the TR-4 it's
>>>>>> the same part for both sides.  The trunnions are
>>>>>> "handed" too - right / left hand for both set ups (but are different
>>>>>> parts).
>>>>>>
>>>>>> Why is the vertical link different from side to
>>>>>> side?  I'm not seeing the difference and want to
>>>>>> make sure I cover my bases if I make this conversion.
>>>>>>
>>>>>> Thanks, Tony
>>>>>>
>>>>> <snip>
>>
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