Update to my tranny dillemma. 95 850t auto.

Post by **erikv11** » 24 Mar 2013, 17:23

Southbay850 wrote:It wont idle in drive after warm up. When I drive it for a couple minutes the engine will stall when slowing down or making a full stop.It seems like the tranny puts the engine under too much of a load and does not go into the normal idle you would have when you slow to a stop and are still in drive with foot on brake. It grabs gears fine except reverse. Someone else mentioned it could be soleniods.

This must be due to the trans heating up, not the engine heating up, but you could check. Warm the car up well in the driveway before you drive, it, does it stall right away or only after the trans also gets warmed up?

Post by **Southbay850** » 24 Mar 2013, 21:58

It only does it after warming up

Post by **98T5** » 26 Mar 2013, 07:27

Southbay850 wrote:It wont idle in drive after warm up. When I drive it for a couple minutes the engine will stall when slowing down or making a full stop.It seems like the tranny puts the engine under too much of a load and does not go into the normal idle you would have when you slow to a stop and are still in drive with foot on brake. It grabs gears fine except reverse. Someone else mentioned it could be soleniods.

Could it be starving for gas? Does it pick back up after the stall?

Post by **mercuric** » 26 Mar 2013, 13:19

Personally, I'd check the hydraulic pressure of the transmission as the next step. It sounds suspiciously like the pressure may not be within spec -- causing things to fail to engage/disengage when necessary.

I could be totally off base, but it seems a logical test based on what's happening. I'm no tranny expert, so just my 2¢ of what I'd be doing.

Post by **jblackburn** » 26 Mar 2013, 13:30

mercuric wrote:Personally, I'd check the hydraulic pressure of the transmission as the next step. It sounds suspiciously like the pressure may not be within spec -- causing things to fail to engage/disengage when necessary.

I could be totally off base, but it seems a logical test based on what's happening. I'm no tranny expert, so just my 2¢ of what I'd be doing.

Agreed. I'm wondering if the filter screen inside the transmission (not really user-serviceable) is partially clogged and can't provide proper pressure when the fluid thins out when hot.

Or if a line pressure solenoid is to blame.

Post by **Southbay850** » 26 Mar 2013, 17:33

I saw these filters being sold on ebay. Whats the point of even having one if you cant access it to change when needed.

Update to my tranny dillemma. 95 850t auto.

Re: Update to my tranny dillemma. 95 850t auto.