1991 Dodge Spirit 3.0L V6 with 4 speed automatic transmission bought for $1,000 has 58,000 miles. Car is beautiful inside and out. Want to fix it for high school and college for 16 year old daughter.

The transmission is in limp-in mode only engaging 1st and 2nd gears. Aamco manager, former Chrysler dealership mechanic, says when connected to scan for error codes the scanner will experience loss of signal. Suspects wiring harness issues for transmission or the transmission computer (which has been replaced to most recent new firmware/software by previous owner).

Any known issues for wiring harness or connectors for a 91 with the 4 speed overdrive transmission? Know the transmission was a redesign with new internal parts in 93 or 94 and would rebuild to those new parts if required. First have to solve this electrical problem.

U-Pull-It has a 91 4-door LeBaron which is the same car as Acclaim/Spirit for 91 model year. The under hood wiring harness is $45.

Dealership service dept says there is no information, no repair kits, no new parts. They are basically helpless and hopeless.

Can Aamco tell a transmission needs to be rebuilt from scanning codes? No automatic transmission rebuilding experience.