1987 3/4 ton GMC 700r4 Transmission Problem??????

[92RS]

Hello,

So here's the deal, The transmission wont come out of the lower gears and truck screams to even go 35. Started to not go into Od last winter, sat all summer, had a cooler line leak and now it won't come out of low. Tranny is full/overfull of fluid, and the leaks are all solved. Thinking maybe soleniods or TCM? Any help would be appreciated.....

thanks,

-RS

[72 rs]

i had the same prob. with my tranny in my 87 half ton. in mine the clutch bands wentout abd basiclly my tranny justblew up internally, wasent much to fix when i got it home. the 700r4 trannys in the 81-87 pickups were kinda crappy, i wouldent even rebuild one unless it was done by a VERY VERY well known shop. i put a 700r4 , tourque converter, and flywheel off of a 91 transam (SP?) in my truck and love it. it pulls better, and gets better gas milage than the stock one.