| Re: 94 automatic - soft shift |
Subject: Re: 94 automatic - soft shift by aapple on 2008/5/29 4:09:34 You wouldn't see any leaks from the servo externally...at least none that would cause the soft shift. Don't get me wrong, the trans may have an internal problem, but I prefer to eliminate the easy stuff first. In this case, I would remove the servo, and check the sealing rings for the 2nd gear part of it. If the rings were good, I'd have to start digging into the valve body or accumulator for answers. Of course, once you get the pan off to check that stuff, the pan itself will help with further diagnostics. If there's a ton of crap in the pan, it's time for a rebuild anyway. If the pan is fairly clean, and only has minor "varnish", and no major chunks, then I'd check the accumulator for a damaged spring or accum. piston. The center hole of the accum. piston can and does wear out, making it egg-shaped, which allows the 2nd gear fluid pressure to bleed off. It's very common to see the piston messed up, as it is to see the spring broken. Both are easily replaced. If the accum. looks okay, then it's time to remove the valve body, and see if there are any stuck/sticky valves. After that...well...it's time to pull the unit. Have you scanned the ECM to see if there are any codes in it? Sometimes that can point you in the right direction, too. The trans in the '94 is electronic controlled...don't see a lot of issues with the solenoids that would cause only one shift problem, but it could happen if the EPC(electronic pressure control) solenoid is gunked up, and not responding quickly enough. hth |
