Torque converter repair or replacement?

[zukitrek]

Hello Fix. Repair shop tells me that TCC might have to be replaced. When is that necessary or how can this be tested checked on car or once taken out?

Thanks!!

[fixkick]

a rattle test, its all welded up.
what do you mean TCC fail.
is the trans shifting all gears, and only the lock up (TC) fails>?
the ecu will flash a code for that.
what are symptoms????

[zukitrek]

No new symptoms. This is related to the rebuild the repair shop is going to do. They tell me that Torque converter has to be replaced and tranny is not even out.

WTF?

Javier

[fixkick]

all a/t repairs, begin with a rebuilt or new TC
after all there is no way to test it. (cept pull trans 4 times if your tc is bad. that be super expensive labor there)
this is what an overhaul means..
it begins there.
the clutch is a welded structure, it can not even allow you to see the broken , or bent or damage vanes inside.
this is SOP , standard operating procedure.
there are lots more ,parts, see the full kit yet? huge count of parts.
then after take down the whole box, then there can be surprises, oh look here, the 3gear clutch cage is wrecked. what will be , will be, no man on earth
can guess what they will find there.
sure bad seals, and clutch disks.... and maybe more.
all this is part of the quote right. or just labor.

see the youtube videos, called all steps in overhauling a transmission, its like 3 or 4 series long.
very good some are.
or

one of these, step one is the TC, its first thing to fall out.
http://www.barnesandnoble.com/s/transmis...tid=363546

---

the end of the tc has this coupling shaft that fits in the front oil pump ,
and what if the TC is removed and that seal fit to the end of that has this huge groove there.
they will not use that TC, for only that reason alone.
see?

this is just step one, at drop.
that surface runs inside the pump housing seal, if this surface is galled, the next seal fails pronto.
this story repeats over and over, inside the box....
rear of TC end.
http://www.apexeta.com/img/535i/converter.jpg

---

a/t repair is a very high skill craft.
takes a good teacher too. and examples lots.
its like engine rebuilding but 10x more tedious.
lots and lots of parts and tricks to do test as you build it back up, we use low pressure are to test servos at many points, on reassembly.
goals.?
new tc.
checking main planetary gear sets for damage, and then installing clutches like new and new servo's . all tested on the bench too.
then rebuilding the valve body. and more tests.
in pro shop they have an electric engine simulator stand that drives the A/T box and they test it using a brake (output load , braking or a water pump with a variable shunt load.)

[zukitrek]

all a/t repairs, begin with a rebuilt or new TC
after all there is no way to test it. (cept pull trans 4 times if your tc is bad. that be super expensive labor there)
this is what an overhaul means..
it begins there.
the clutch is a welded structure, it can not even allow you to see the broken , or bent or damage vanes inside.
this is SOP , standard operating procedure.
there are lots more ,parts, see the full kit yet? huge count of parts.
then after take down the whole box, then there can be surprises, oh look here, the 3gear clutch cage is wrecked. what will be , will be, no man on earth
can guess what they will find there.
sure bad seals, and clutch disks.... and maybe more.
all this is part of the quote right. or just labor.

see the youtube videos, called all steps in overhauling a transmission, its like 3 or 4 series long.
very good some are.
I saw all 4 vids, the first one starts Duane the technician right? but just as an intro then the other guy takes over? Very good videos indeed.
or

one of these, step one is the TC, its first thing to fall out.
http://www.barnesandnoble.com/s/transmis...tid=363546

---

the end of the tc has this coupling shaft that fits in the front oil pump ,
and what if the TC is removed and that seal fit to the end of that has this huge groove there.
they will not use that TC, for only that reason alone.
see?

this is just step one, at drop.
that surface runs inside the pump housing seal, if this surface is galled, the next seal fails pronto.
this story repeats over and over, inside the box....
rear of TC end.
http://www.apexeta.com/img/535i/converter.jpg

Got it. Quote is for the whole thing: labour, parts, removal, cleanup, inspection (the surprise part) and installation. OK then 1100 seems super reasonable.

Cheers and thnx!!