I just bought a set of four sachs turbo shocks from IPD for my 88 245, I was about to put the rear ones on the car today but then pumped them several times (to cycle) and one came up a faster than the other, like 5 seconds...the front ones the difference is even worse, like 10 seconds. i think that's pretty significant, right?? should i expect new shocks to behave exactly the same? they have the same part #s on them and made in mexico.