Sporadic hard shifting
Take an have DTC'S - diagnostic trouble codes read .
I did .....They replaced the spark plugs the 4 coils fuel injector service. Then they replaced 2fuel injectors. over $1000 ... still nothing
don't know where you took it too , but we would still need to know what codes were stored .
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SOURCE: 2006 Chevrolet HHR LT Problem
After searching around, I found several posts that suggested reseating all the relays and fuses under the hood. After checking, I noticed nearly all of them were not seated well. I pushed them all down and I haven't had the problem since.
Ken
SOURCE: 2006 Malibu Maxx ss hard shifting/Check engine light
There is no dip stick. Its most likely not the fluid. These malibu's use the first generation GM LAN system. Check the data cord comming from the transmission near the mechanical shifting linkage. Alot of these shifting issues and errors are from a break in the wiring causing bad data to be sent/rvcd to/from the computer control module- these cars are electronically controled shifted, not mechanical.
SOURCE: 2006 Chevy HHR Traction Control Light and Check engine
i fixed mine by pulling each and every fuse in all the fuse boxes and replacing them with new ones. the hhr fuses have a tendency to work loose and cause all kinds of little problems. i searched the forums for the answer to the traction control light problem and never found an answer that worked until i talked to a "shade tree" mechanic in my area and he told me to do the fuse thing. been a month now and no more problems.
Testimonial: "The comments I left are the solution. The fuse thing does not do anything. It's a red herring. I replaced only the one that's associated with P0010 and It's been months."
SOURCE: Traction control on chevy hhr 2006
The traction control and transmission shifting would involve the body computer more so than the engine computer.
Have you had the body computer scanned for trouble codes ?
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