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Old 04-13-2019, 02:39 PM   #3
bigdaddy4x4
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Join Date: Aug 2012
Location: concord ga
Posts: 189
Re: 1991 4l80e no gears

Quote:
Originally Posted by BurbFam View Post
Hey guys, i've got a 1991 v2500 5.7 TBI with the 4l80e. i pulled the original trans do to hardshifting, and the rear main was leaking anyways. found a used trans out of a 93 motorhome with "36k miles" but it was a 2wd so i had to swap the output shafts. i'm pretty confident with how everything went back together.

i dont know how long the trans had been sitting but the truck hadn't been started for a year. finally got evertyhing put back together and started it up yesterday, it took a bit of effort (even with a new battery and starter) just to turn the motor, like something was holding it back, but once it "broke free" it idled and revved fine. but i have no gears, nothing forward and no reverse.

is there any wiring issues that might cause this? my research brought up possibly a bad pump, maybe thats what was holding up the motor from starting? won't have a chance to pull the trans lines off the check for flow till next week, hoping i can get some more info from the minds on this site until then. Thanks.
it sounds like you broke the front pump did you make sure the torque converter was all the way in like its suppose to be ?
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