hope Doc reads this one
Vehicle: 89 S10 Blazer, 4X4, NP231C, 700R4, 4.3L V6
There is a bad leak <not pouring, but enough to spot the driveway if I
park for a few minutes> of ATF between the transfer case and the
transmission, where the factory tailhousing adapter meets the transfer
case. Both units use ATF.
Now, I thought the 231 was sealed front and rear-Thought the 700R4 was,
Transmission is a fresh rebuild,
literally by the best guy in town,
all the Corvette and custom truck guys use him, he knos his stuff and
comes highly recommended from several folks.
I am told that there is no seal on the rear of the 700R4 in this
application, as it normally in a 2WD configuration is sealed by the slip
yoke and the seal at the rear of the tailshaft housing, and in a 4WD
application by the presence of the adapter housing and all the
associated orings and so on between transmission/adapter/transfer.
Transfer could probably use a looking-through, but I'm not going inside
her till I have a SYE kit to install.
I'd like to think it's as simple as my not having had the proper oring
when I assembled them all, and having used RTV and not made the proper
seal between trans and adapter. Still, that's a lot of work to tear it
down and find out it's not the solution.
BTW- transmission is losing fluid, though I'm not convinced it's not
from a leaking cooler fitting <haven't had chance to look into that yet-
==============(from me to you)
Take the transfer case back down.....
carry it over to......
"literally the best guy in town"........
you know .....the one all the corvette dudes
are sending you to.
When you get there with yer transfer case,
after spending all that time on yer back yank'n
it back out.......ask him .......
WHY HE DIDN'T SUGGEST CHANGING
THE SEAL IN IT !!!!!!!!!!!!!!!!
before you put it in.
oh yeah......and you may wanna ask him to
sell you one of those $2 case gaskets he's got
laying around the shop somewhere.....hanging
on a nail....or tossed in a box.....or a drawer...
you know he's got plenty of em......
CUZ HE AIN'T GIVE'N EM TO THE CUSTOMERS !!!!!!!.....on the "bench build"
so.....chances are .....he may not even charge
you for it.
if you use the gasket.....you won't be so worried
about wipe'n the silicone off THIS TIME.....
when you go sliding that transfer case around
while yer laying on yer back try'n to line up the
bolt holes. Though.....silicone is all I ever use
myself....only cuz one part number fits all.
any whooo....you may want to ask
"literally the best guy in town".....why he
didn't suggest changing the seal on that
case.....or at least tell you to be sure to seal
case half up good so's if'n it did leak.....
IT REALLY WOULDN'T HURT A THING.
I'm curious bout one thing.....
did..."literally the best guy in town" even
suggest changing the tail shaft seal on the
transfer case ???? (just was wondering)
(in case you read faster than I typed)
pull the transfer case back down...
clean the surfaces up good....
silicone both the tranny AND the transfer
drink a Budwieser...or better yet...a tall glass
of Crown & coke......
then....and not before....
put the transfer case back on the truck and
drive the truck over to "literally the best guy
in town" and let him replace that tailshaft seal
After all.....YOU don't want HIS unit to fail just
because of a STUPID MISTAKE like not replacing a tailshaft
seal...especially when he
had no way of knowing that the input seal on
the transfer case was bad or good!
(or did he??)
~wonders what kinda of info "literally the worst
guy in town" might have given you when he
handed you that bench job...oh well.....guess
we'll never know~
better take my advice on that drink before you
go putting that case in on yer back this time,
and if'n you drink like me.....you better make
it 4 ....cuz yer want'n to let that silicone cure
for about three or four minutes before you go
shoving it in there this time.....that way you
stand a better chance of not wiping it off while
yer twisting it around aligning the bolt holes.
(yeah....4 would be best)