Looks like I'd better find some TR6 lower control arms to swap out with
since I have a spare pair of new TR6 trunnions. Thanks all.
Bob Kramer
rgk@flash.net
> The TR3 and early TR4 have trunnions that are the same for each side and
have
> degree caster. The late TR4 with a right and left side have the pin set
for 3
> degree caster. The TR4A and TR6 use a bolt instead of a pin thru the
trunnion and
> are also set for 3 degree caster and are right and left sided. The late
TR4
> trunnion with 3 degree caster will fit the early TR4 vertical link. I did
this on
> my TR3A and also changed the upper A-arms to the TR6 with the bolt in ball
joint.
> Much easier to change and cheaper.
>The TR3 and very early TR4 used the same lower trunion, with a zero degree
caster
>angle built in.
>The rest of the TR4 series used a trunion with a 3 degree caster built
in --
>that's certainly the one you want.
>The TR4A - TR6 has the caster built in, but rather than having a steel stud
for
>a-arm mount cast into the bronze casting, the TR6 has a hole bored through
and
>takes a large bolt through both lower a-arm castings and the trunion. If
you
>desire to use this arangement, I believe you must also use the TR6 a-arms
with the
>TR6 trunion because the bushing diameters are different.
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