The wierdest thing happened to me last night on the way home. left a friends house cruise to the freeway at about 35mph, everythings fine. start merging on to the freeway doing about 45 in OD give it 1/4 throttle and the rpms slowy rise to 4k` pullig the car alittle but most of it's power sliped. baybed it home it shifts into 3rd and 4th and acts normally but if you give it any gas at any mph in theese gears it just slips and revs. first and second hold well though.

If i put the shifter into 1st and floor it grabs, and if from there i manually shift it to second it grabs normally and i can give it gas and it pulls up to 70-80 like usual. but if i put the shifter in drive it grabs 3rd. rpms go to around 2500, and it doesn't slip as long as im coasting, no gas, giving the motor just enough gas to hold the current speed. if i'm cruising and i started heading up hill the extra load lets the rpms rev withought grabbing, and it won't grab in 3rd or 4 th under load. so basically it leaves me gearless after 70mph. the tranny hasn't been rebuilt from the best of my knowledge but was always well maintained by the mechanic that owned it before me, the original owner since 1988, the car now has 112,000 miles.

it's alway run well. on a further note for the last week 2nd to 3rd was slipping under 1/8 throttle but nothing like now. it would be at like 2k rpms in second and it would slip to 2500 then slowly grab 3rd and be at like 1500 rpms or so. but once it grabed third i could hold it up to 120mph no slippage, back of the throttle 1/3 and it would grab 4th.

i have a very limitted budget. cant aford to pay a shop. but feel more than comfortable doing it myself. i would just really appreciate some input/ideas as to whats wrong and what i need to do to fix it

 

sounds like the 3/4 clutch pack is slipping. ususally means it is toast.

 

is it worth trying to rebuild it my self or just go to the boneyard, i don't have much cash

 

Put a fork in it. It is done.

 

it can be rebuilt, but it might cost a little depending on how much you have done.

 

is it worth trying to replace the clutches or should i be leaning more towards replacing the whole trans?

 

the problem with getting a used one is you never know how long they are going to last. if you know how, the clutches can be replaced. but while you have it out, you might as well rebuild it.

 

so theres no easy way out of this one. yeah and i really don't want to pull a tranny out of the boneyard to find out it's dead too. so if i toasted the clutches there should be some debbris/ burnt fluid in the filter/pan right?

 

good possibillity, but not always. what prompted me to do my first tranny was a burnt 3/4 clutch pack. mine didn't smell or leave anything but hte usual sludge that a tranny with some miles on it leaves in a pan.

 

thanks 87zjeff for responding to my post i really appreciate all the help. i guess i'm still trying to find the easy fix but maybe not this time. my fluid is supper clean, clear- dark red, considering i haven't changed it in the 40,000 miles i've put on it theese last 2 and a half years. a quick question, is it common to loose drive and overdrive and the same time? do they share the clutch or did i some how burn up 2 different clutches at the same time? please continue to post any helpful ideas. thanks, Scott

 

third and fourth do have a common clutch pack. it is called the 3/4 clutch pack. the difference is that the 2-4 band applies in fourth as well as this clutch pack. plus, a rebuild could explain why the 3/4 clutch pack went out in case it wasn't age that did it. there are numerous reasons for it to happen. the vids/books might tell you but i kind of doubt it.

 

Where you from? I know a few guys in the area selling 700R4s for under $200.

 

You can do it your self, but keep in mind that it would take from 9-20 hours in labor, plus you need to buy some special tools. You can buy stock rebuild kit for about $80

 

I had the same thing happen with the TH350 that I put in my car before going back to the 700R4. Mine was 2nd to 3rd slip .... it would catch until about 1500 RPMS and then it acted like it was in neutral. I didn't wait for mine to go out, I just replaced it with a rebuilt 700R4.

The problem you're going to find if you keep driving yours is that if the OD goes out, so will your Reverse. Typically when you lose one, you lose the other. That's what happened to my friends 700R4 anyway.

You can probably find someone to rebuild it for the price range of about $350-$450 depending on where you. The other option is getting a rebuilt one for about $700.

 

This thursday i 'm planning on pulling it out with a buddy and taking a look on the inside.and go ahead with the rebuild later on this week. thanks for the replys. Ifa buy a transgo shift it would it include the clutch i need to replace?

 

no, the rtansgo shift kit doesn't come with clutches but if you are going to spend the money, it is a good shift kit to go with.


86tpi, the loss of reverse with OD is a different matter than the 3/4 clutch pack. that has more to do with the band and reverse input clutch than the 3/4 clutch.