Jim:
First gear is where the greatest torque and therefore greatest wear
occurs.
Also, when in forth gear the power is transferred directly from the input
shaft to the output shaft (bypasses the gears entirely). The output shaft is
shared by all gears, so a bad bearing or some such would be most highly loaded
in the lower gears because of torque multiplication. So it is unlikely to have
anything to do with the transmission (IMHO).
Have you checked your motor and tranny mounts? 4th would place a lot of
pressure on the motor mounts in particular, although that does not explain why
you feel it through the steering wheel. I suppose if your mounts were in
really bad shape, the motor might sag to the point it touches the frame near
the steering rack (I can't remember the exact motor position relative to the
frame, so this is just a WAG).
Anyway, have you checked your motor mounts?
Vance
Vance Navarrette
Cogito Ergo Zoom
I think, therefore I go fast
-----Original Message-----
From: jim hearn [mailto:jimhearn1@comcast.net]
Sent: Wednesday, June 24, 2009 12:54 PM
To: Navarrette, Vance; '6 Digest'
Subject: RE: [6pack] Trying to locate the source of a TR6 vibration
Thanks for all the input. I've been all through the wheel bearings and
they are fine. I too have had tire balance issues that were pretty
evasive but finally conquered. This vibration doesn't have a particular
speed range; it just needs to be in fourth gear (at just about any
speed) with some acceleration taking place. My thought is that it could
be a bearing in the tranny to do with the final output shaft but I don't
know TR6 trannys or any trannys enough to say for sure. Jim
_______________________________________________
Support Team.Net http://www.team.net/donate.html
6pack@autox.team.net
http://autox.team.net/mailman/listinfo/6pack
http://www.team.net/archive
|