Hi guys...i have one or more big problems with my renewed TH700 1991 vette transmission..
trans guy did the work and we putted in also TCI constant preshure valve body...at first trans worked ok..with hursh engagment when i switched to drive or other gears..then after 60 mils of driving it died..but was not like before that burned only 3-4 gear..now there is no gears at all!!today i will take my car in the garage and tried to find what is wrong..
in the manual ATSG sais that is something wrong with my converter if i don't get any gears...
have any ideas?
thanx!
BR,Seba

 

Here's a link describing how to attach an oil pressure gauge so you can monitor
the transmission pump pressure.

http://www.tvmadeez.com/press_gauge/index.php

 

thanx...

hi Pete....
*the fluid was full...i dismounted the trans from the vette now and i will open it in next weeks..i have to make some tools first...
*fluid smels a little bit, but is not brown..is normal red..like new condition...
*shifter linkage worked properly since i drove with the car 60 mils and everything worked perfect...only problem i noticed was harsh engagemant..it was very severe...but then it worked great...
*everything was new..filter oil....there was no leakage...
*converter bolts were on

i also first assumed that the pump is gone...i will see..i will keep you informed...
i will check also forward apply piston...there is also no reverse;/...
there is no gear at all...when i put in any position there is no effect..

Pete it happend between i drove..there was no noise or bump before this...it was in Drive position...i drove normaly 40 mils/h after some cars infront of me...and then when i tried to accelerate...it was like in neutral...
it was not like last time when my 3-4 burnt out...but 1-2 stil worked properly...and the oil was also brown...i hope i dind't burn the clutches..
i have Raybestos blue plate clutches in...
Thanx for now..
BR,Seba


the trans is in my garage now...so i will disasamble it in a while,,,

 

Mine did the same when I ran a restalled stock convertor behind my 500Hp 383.( don't ask )
Blew the sprag in the convertor

 

hehe....can't beat that feeling;/....
when it happend to me...in that moment i would fry the trans guy...but than i calm my self down...my girl said to me that i was very calm...but inside me was a vulcano...believe me..hehe...
she would probably exploud.....so..now i will do it on my own....

but still my engine is quite stock...few small modifications...
so i hope it's not something serious...hehe..

....so when it happend did you heard something..some noise, bump,...?
i didn't hear nothing when it happend...strange;/

BR,Seba

 

Nope...we listened to your and some other ppl's addvice and we left the 10 vane pump in...
BR,Seba

 

 

....i have to do some tools now to dissmount everything...

 

ooou..hi Pete...i have my tranny on the bench but still i couldn't find time to open it...'cause i moved in another town and i have had a lot of my stuff to move here...and i had to prepare my garage first..too))...
so now i will start to play with it...
i will inform u about all strange things in it
Thanx a lot for all help here
Br,seba

 

Hi...i dismounted the trasmission now..and i found out that the pump is broken...PeteK can you give me your email that ia can send u photos of the pump so you can idetify what was the problem of this failure..
BR,Seba

 

BUMP

 

any ideas folks??

 

is there anything salvageable or left of the front pump?
did both front pump halves get trashed?
the stock pump rotors sometimes fail without notice.
they are made of powdered metal. strong but not fracture resistant. stock pump rotor can be iffy in high performance or race applications.

i used a billet steel 10 vane pump rotor in my trans from patc transmissions during my rebuild and upgrades. not cheap to buy.
$90.00 for their billet steel pump rotor.
but money well spent i figured at the time, like buying an insurance plan.
i am thinking now i made the right choice. your stock powdered metal pump rotor broke.
i believe its high line pressure necessary in these transmissions to keep them alive under high torque loads and high rpms thats kills many stock pump rotors in 700r4 and 4l60e transmissions.

talk to pete k. yet.

i would buy that 10 vane billet pump rotor, use it, and recheck your trans piece by piece.
better safe than sorry. my motto.

brian

 

thanx Brian... i will buy this pump..hopely there was no other damage to the trans...
i will buy it for shure...
nope i didn't talk to PeteK jet..he is maybe bussy..maybe is out of town...
i hope that he will see my thread here..

I also find out that trans guy get me my old pump from 86' on my 91' transmission...like i saw on the video they said that the pumps sims to be different in oil passage angle...is this true?or there is no diference between 86' or late model pumps?

BR,Seba

 

hmm..Brian...where did u find this 10 vane billet pump rotor for 90$..i saw only this....

#10BR. 700R4 / 4L60E / 200-4R Billet Steel Pump Rotor and Slide Kit. Made from 4340 steel then heat treated. Sold as a set only. Comes in 10 vane only. Cost $232.00

or is other pump?please let me know..
BR,Seba

 

I bought my 10-Vane billet from PATC transmissions.
I Ordered it direct.
Google search "PATC Transmissions".
Click on their website, scroll through all items.
You will come across this billet steel pump rotor.

You need a 1987 auxiliary valvebody equipped and later 700R4 front pump to fit your 1991 700R4.

1986 model year wont work.

Try W.I.T. (Whatever It Takes). They are in Kentucky, USA.
They should have a nice used and correct front pump you need for your 1991 Vette.

Best time to get a hold of Pete K. is on Sundays.
I'm not 100% comfortable filling his shoes with Auto trans problems.
I am good with them now.
But I learned from Pete K. last year also and a few others too.

Pete K is Very Sharp and Smart with any C4 auto trans problem.

Brian

 

ok..i will check for this billet pump..yeah i realy hope that Petek will see this threat...and that we can do it right this time..'cause my trans is a realy pain in the *** now...
just for the record..i use constant preshure valvebody from TCI..i bought it brand new last year..but the pump the trans guy give on was from year 1986...I saw this now when i dismounted the trans apart..and on video they said that 86' pumps are not good for later aplication due to different angle oil ports...
BR,Seba

 

Post all the pics here SEB !

 

how can i do this Sammy?..i tried but with no sucess...asks for web page..please help me..

 

http://forums.corvetteforum.com/faq....b3_attachments

Get a Photobucket.com account and link from there