saxon
Well-Known Member
- Joined
- March 30, 2006
- Messages
- 149
- Reaction score
- 1
- City, State
- seattle, wa
- Year, Model & Trim Level
- '91 & '93 EB, 4WD, 4-door
X moves forward in reverse & neutral
as in it move forward in neutral, reverse and even park feels like it wants to move and is only being held back by the park pawl.
So, the mystery continues. I know that you cannot really diagnose problems when you replace ten things at once but patience is not one of my better angels.
Model: '91 4WD EB A4LD - 207k miles
similar threads by other members:
http://www.explorerforum.com/forums/showthread.php?t=145913&highlight=neutral
http://www.explorerforum.com/forums/showthread.php?t=117843&highlight=neutral
In the last few days, I have replaced the vacuum modulator (new vacuum hose, too), replaced a few broken vacuum lines in engine bay, removed the transmission filter (original?) and replaced with Fram microfilter (yes, I'm sure that the o-rings are installed correctly), adjusted bands (120 in/lbs then two full turns out), installed pan drain plug, new pan gasket, torqued to 110 in/lbs., added 4.2 qts. of Mercron III (fluid was low when I drove up the driveway). I saw no loose clips in the pan; the cable seemed correctly installed. I have lots of photos from before during and after.
When I first removed the pan, I found (all in one corner of the pan directly below the low/reverse servo) a small pile of broken,.... plastic or very hard rubber chunks of what looks like it may have once been a seal. It will be interesting to see what I find when I take out that servo tonight.
I have many photos of the steps taken to date but I think I have to pay to become an elite explorer, first? Not sure how that works.
Last week: No reverse. X would move but would take time before engaging (reverse/low servo seals?). X barely made it up the steep driveway and had no reverse. Fluid smelled burned after driving it up the driveway. Fluid was low; I think only 1.5 quarts came out of pan.
Now: X wants to move when in park and drives around quite nicely while in Neutral. Oh, drives forward a bit while in reverse, now, too. Huh? Drove quite easily up the steep driveway. First gear no longer takes forever to engage. Shifts are very soft; IMO, hard to tell when in second or third. I think that first and second are working 'okay' (compared to last week anyway) but it shifts to mush when it goes into third. If I stomp on it, it hooks up adequately. If I let off and then apply light throttle (say at 30mph on flat ground, I presume in 3rd) its a slushbox. If I put it in 1st at 25mph, it will shift down and rev the engine. Oh, neutral works just fine if you turn the engine off. Fluid no longer smells burned but will drain pan again when I do the low/reverse servo seals.
I didn't expect Rev. to work until I replace the reverse/low servo seals (tonight). I have not checked the VB bolts torque; manual arrived a few minutes ago so was not sure what the torque values are.
I think that I may have under-tightened one of the bands (the one towards the front of the car; I think the overdrive band?). That adjustment bolt was really rusty. Leaving the bolt in the trans., I cleaned a lot of the rust off with a wire wheel on a dremel, then soaked it in PB blaster. Then ran the locknut over it a few times (hard work, it was pretty rusty). I then tightened the adjuster to 120 in/lbs. but may have under-tightened due to the rust on the threads. I assume that I cannot take the bolt out to run a tap over it; as an alternative, can I take the lock nut off and run the tap while the adjuster is still in there? What size tap? Hmmm...., I don't think that will help on the portion of threads that's IN the transmission body (e.g., the threads that are probably messing up the adjustment torque).
I understand the 'no reverse' issue but I do not get the driving forward in Neutral along with wanting to move while in park.
If flushing another 4 qts. out when I drop the pan tonight, installing the low/reverse servo Viton seals, and checking the torque on the VB bolts doesn't do the trick, I will rebuild the VB this weekend. The TransGo Jr. kit just showed up by mail and I now have the manual.
as in it move forward in neutral, reverse and even park feels like it wants to move and is only being held back by the park pawl.
So, the mystery continues. I know that you cannot really diagnose problems when you replace ten things at once but patience is not one of my better angels.
Model: '91 4WD EB A4LD - 207k miles
similar threads by other members:
http://www.explorerforum.com/forums/showthread.php?t=145913&highlight=neutral
http://www.explorerforum.com/forums/showthread.php?t=117843&highlight=neutral
In the last few days, I have replaced the vacuum modulator (new vacuum hose, too), replaced a few broken vacuum lines in engine bay, removed the transmission filter (original?) and replaced with Fram microfilter (yes, I'm sure that the o-rings are installed correctly), adjusted bands (120 in/lbs then two full turns out), installed pan drain plug, new pan gasket, torqued to 110 in/lbs., added 4.2 qts. of Mercron III (fluid was low when I drove up the driveway). I saw no loose clips in the pan; the cable seemed correctly installed. I have lots of photos from before during and after.
When I first removed the pan, I found (all in one corner of the pan directly below the low/reverse servo) a small pile of broken,.... plastic or very hard rubber chunks of what looks like it may have once been a seal. It will be interesting to see what I find when I take out that servo tonight.
I have many photos of the steps taken to date but I think I have to pay to become an elite explorer, first? Not sure how that works.
Last week: No reverse. X would move but would take time before engaging (reverse/low servo seals?). X barely made it up the steep driveway and had no reverse. Fluid smelled burned after driving it up the driveway. Fluid was low; I think only 1.5 quarts came out of pan.
Now: X wants to move when in park and drives around quite nicely while in Neutral. Oh, drives forward a bit while in reverse, now, too. Huh? Drove quite easily up the steep driveway. First gear no longer takes forever to engage. Shifts are very soft; IMO, hard to tell when in second or third. I think that first and second are working 'okay' (compared to last week anyway) but it shifts to mush when it goes into third. If I stomp on it, it hooks up adequately. If I let off and then apply light throttle (say at 30mph on flat ground, I presume in 3rd) its a slushbox. If I put it in 1st at 25mph, it will shift down and rev the engine. Oh, neutral works just fine if you turn the engine off. Fluid no longer smells burned but will drain pan again when I do the low/reverse servo seals.
I didn't expect Rev. to work until I replace the reverse/low servo seals (tonight). I have not checked the VB bolts torque; manual arrived a few minutes ago so was not sure what the torque values are.
I think that I may have under-tightened one of the bands (the one towards the front of the car; I think the overdrive band?). That adjustment bolt was really rusty. Leaving the bolt in the trans., I cleaned a lot of the rust off with a wire wheel on a dremel, then soaked it in PB blaster. Then ran the locknut over it a few times (hard work, it was pretty rusty). I then tightened the adjuster to 120 in/lbs. but may have under-tightened due to the rust on the threads. I assume that I cannot take the bolt out to run a tap over it; as an alternative, can I take the lock nut off and run the tap while the adjuster is still in there? What size tap? Hmmm...., I don't think that will help on the portion of threads that's IN the transmission body (e.g., the threads that are probably messing up the adjustment torque).
I understand the 'no reverse' issue but I do not get the driving forward in Neutral along with wanting to move while in park.
If flushing another 4 qts. out when I drop the pan tonight, installing the low/reverse servo Viton seals, and checking the torque on the VB bolts doesn't do the trick, I will rebuild the VB this weekend. The TransGo Jr. kit just showed up by mail and I now have the manual.
