if it is indeed 'shifting in and out of overdrive', that has NOTHING to do
with the TC
if it is, however, shifiting in and out of LOCK-UP, the problem is in the
valve body, and IF you have NOT run it too long like that (this one has the
'woven carbon' lining and is pretty bullet-proof) the problem can be
correct from the valve body end.
in and out of OD = 30% RPM change (2100-2800-2100-2800 etc)
in and out of LU = 200-300 RPM change max
take it to a shop that does a lot of trucks, and tell then you suspect that
the 'torque converter regulator valve bore' is worn...if so, they can
install a sleeve and valve to fix it
DO NOT continue to drive it like that, because the ECM will see the TC slip
and jack up pressure to try to stop the slip, and the high-pressure 'BANG'
shift from first to second WILL break things
Man, that really sounds like my problem but I have continued to drive it.
For instance...i take the turn to head to my house....short street and
cul-de-sac so i'm not on the gas long or hard. When I let off the
gas......CLUNK but with distinct metal to metal overtones. I just thought it
was the tranny shifting "hard" due to the hypertech program installed.
I'll heed your warning and get it checked out. Is it something they can put
up on the rack quickly and diagnose without tearing out the entire
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