Hey mark... where are you located at and where did you get the tranny from? What exactly was done on it? I know a couple guys that do Hi-Perf 700r4's. One will actually crack the tranny open while you watch and explain exactly what went wrong and what he will do to repair the problem. I had one done up for my last street rod firebird and was the best tranny I have ever had. Price was very reasonable too. There also are a couple companies out there with extremely good reviews. One is a place that recently hit it big, but I knew of them from my cuz. They are located in LA and have what is called a "Raptor" 700R4. I also highly recommend Art Carr. His 700's are masterpieces and are run by racers, off-roaders, and street rodders all over.
 
In terms of what I know about 700's... you don't need a shift kit for them really. Most mods can be made by a  smart tranny tech by drilling, replacing springs, and passage mods. The 700r4 is still the most commonly screwed up tranny. They need top be updated with numerous parts and they commonly had a 1-2 shift problem even in the late models. Many shops try to fix this by modding 2nd to shift in faster, but forget to modify 1st to release quicker, thus it binds and burns up #2 which was not a problem at the factory. This can also cause overheating and TC problems. Many people use a corvette servo which has mixed feelings by different shops. The skinny, the vette servo makes the shift rough because it is designed for a vette tranny w/ a special aux. Valve body. It does have more surface area which is why many use it. I have also heard of people using caprice servo's or custom built ones. "Alto" clutch packs also have mixed reviews.
 
Mikey
 
 

Mark Weber wrote:

I need some opinion from some other people about a problem I have with the transmission in my 71 BBC SS I am restoring.The background: Bought rebuilt TH700r4 that was built to stand high horsepower and torque during summer of 2001, installed into frame and it sat for about 1 year.  Did not get the body on the frame until spring 2002, and did not get the car on drivable (hood on, aligned, insured etc) until June 2002.  With only 150 miles on the car, the torque converter blew up during a 2 - 3 shift last Friday and pumped metal through the trans.  During the previous 150 miles, the shifts were pretty soft.  It has shift kits and many other components that were supposed to give it a good firm shift.  A trans shop I talked to this week said a weak pump would cause low pressure and mushy shifts.  I suspect that was a problem too.The problem:  The company I bought it from says that's too bad.  The warrantee was 6 months and they have to stick to this.  They offered to rebuild it and put parts in for cost and go easy on the labor charges if I ship it to them, 2000 miles away.I am not an unreasonable person.  I halfway understand where they are coming from with having to draw a line somewhere.  Does anybody else have a similar experience with a problem that showed up later due to a long restoration time period?  Or, is this just bad luck and that's the way it is?I don't think I got anything in writing about starting the warrantee once the car is drivable.  I will check my email box at work tomorrow though, maybe there is something there.I have not talked to the owner of the place yet. But the guy I did talk to supposedly got his instructions from the owner.Guess I need to whine to somebody.  Bummed because I can see the first 150 miles I put on the car ending up costing $6.67 per mile for transmission repair alone :( Does anybody have any advise?Thanks for listening.Mark71 SS

Reply via email to