My 2000 4Runer rear lift gate only goes up part way when cold and always has been this way. Toyota replaced them once (or at least said they did) under warranty but no difference. When I complained again they said "That's normal and if they were any stronger it would be too hard to close when warm". I bought this originally but now that it's getting cold and I'm bumping my head again, I think they gave me a line. I can't find aftermarket replacements except from Toyota for $150 each and they can't assure me they are any better. I can't be the only one with this problem(can I?). Any suggestions or ideas appreciated. Someone told me there may be people who rebuild these and make them stronger??