I have a 1988 Corvette with a 700R4, not wanting to shift from 1st. to 2nd. unless I leave my foot off the gas for it to shift. Contact [email protected]

Check your transmission fluid level as soon as possible.
If you are experience hard transmission shifts, it is possible that the only problem is a low transmission fluid level. Low transmission fluid level can change the operating pressures of the transmission as well as reduce the amount of lubricant present between the clutches and bands and raise transmission temperatures. All these things can cause hard or jerky shifting. You need to identify why the transmission has a low fluid level and refill it as soon as possible.

I would service the transmission do a filter change and flush on if

first get a trans flush and fill if it keeps doing it then it is time for a new trans because the band are slipping in it and shift module is going out

You could try removing & cleaning the valve
body in trans

You got fine material in there from normal
clutch wear

Check the adjustment of the transmission T.V. cable. Sometimes they also stick. Try driving it at 30. Shift to Neutral, stab the gas pedal to the floor quickly a couple of times. Then shift back to drive. Then see if it shift normal.

I have been hearing a possible solution for this problem is changing the oil filter in the trans oil pan. But ive been looking all over for a solutionand thats the only legit one ive found. It said when the oil gets clogged it doesnt flow to the transmission as nicely as normal therefore leading to lagging changes

No forward movement in OD or D, but L2, L1 and R work: Forward sprag is broken. R&R. Try not to run or drive the car or further damage could result.

Do you have manual 1st? If so, can you shift through the gears...i.e. manual 1st to manual 2nd then 'D' then 'OD'??? Only 1st and 2nd gears use the forward sprag unless the LO/Rev clutch is engaged...i.e. 1st and 2nd if in "drive". If you can shift threw the gears manually then, yes, your forward sprag broke.

If no manual 1st then your sprag is not what broke. Sounds like you blew up the rear planet. If you pull the pan and find chunks of iron and steel, then that is probably what happened. If you have reverse then it is not the pump. If the pump was bad you would have no line pressure and it would slip in rev. or no rev. Not the beef sun shell either because you have rev., a broken sun shell would cause no 2nd, 4th and rev. gears. Either way the trans needs to come out and torn down and it will be easily found what went. Good luck and thank you for using Fixya.

No there are different 700R4 transmission, well that not quite true. The 700R4 had many jobs to matted to Corvettes to SUVs, the internals are where the differences were in the 700R4 such as the servo's and boost valve which can be easily replaced. Best thing to do is to got to a Transmission shop that can build a transmissions for your Corvette or buy a replacement 700R4 for your year of Corvette. That is why the shift points and firmness are different in a Corvette then a Cadillac while they both have 700R4 in the 1990's. Be bad for a Corvette to shift like Grandma's Cadillac going to play dingo. Good luck and hope this helps.

mine wont shift at all stays in first or reverse

common problem. It will need rebuild or replacement. They are common tranny's do due this, there are many out there and reasonably priced.