First test drive with new “a” drive was smooth then OMG, help please
Having repaired the “a drive” in my 2000 xj8 vp, I carefully took my jag out for a two mile test drive in my neighborhood max speed about 30 but silky smooth. I did notice when parking the jag for the day, that it wouldn't go into reverse from drive but after shifting to park it perfectly to reverse all smooth as can be. My next day I plotted a longer drive and hope to also explore the reverse oddity. Backed out of the driveway and off I went, everything as smooth as glass. Then drove up to about 45 and suddenly there was a un solicited downshift to what felt like second when I took my foot off the gas gave it gas and it went back seemingly to normal, the downshift again after a few hundred feet. I slowed to see if I could tell what was happening and when I shifted back from drive to park, the car was still in drive when the shifter was in neutral and reverse, and even in park it seemed engaged even though it will still crank from park and immediately goes back to forward pull against park.
My thought was the linkage was messed up or slipping. I got her off the ground and had a friend work the shifter (engine off) back and fourth every which a way and it clicks into the mechanical gear with perfectly, you can not make it miss shift with the shifter. I have studied this online for a few weeks trying to gather as much info as possible. The only code I get with my OBD reader is 1722 but I'm not a mechanic and maybe I didn't do the “a drive” replacement properly. I really like the car is had a wonderful paint job, original and great interior and ac and sound but I need to fix it without a huge cash layout. The cars have low market value mainly due to the repair cost of the vehicle, and this one will be a heartbreaker if I have to “essentially give it away”.The clutch plates in the transmission only have about 80000 mile but the fluid was solid black, the inside the case was beautiful and only had to replace a few gaskets and no berings. Clutch plates in the a drive looked new...... Thanks for any advice or help If I take it to a transmission place for their analysis what type of analyser do I need to be sure they have to get me the proper analysis... Will P |
To be completely honest, I have no ideas about your issue, but I want to follow this thread.
Best of luck, and I am curious to see what others may have to say! |
Originally Posted by Bcrary3
(Post 1313367)
To be completely honest, I have no ideas about your issue, but I want to follow this thread.
Best of luck, and I am curious to see what others may have to say! |
Originally Posted by Bcrary3
(Post 1313367)
To be completely honest, I have no ideas about your issue, but I want to follow this thread.
Best of luck, and I am curious to see what others may have to say! |
Any harsh shifting? Did you do the valve update? Are you 100% sure the trans fluid level is correct?
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Originally Posted by Sean B
(Post 1314948)
Any harsh shifting? Did you do the valve update? Are you 100% sure the trans fluid level is correct?
Thanks for the input, I'll do this asap...... Will P |
Originally Posted by Sean B
(Post 1314948)
Any harsh shifting? Did you do the valve update? Are you 100% sure the trans fluid level is correct?
When I filled it, it didn't take but about 8.5 quarts, and I know what it's supposed to hold but though some came out of the torque converter, it looked to be a pint at most. I pray that is what it is, I haven't driven it but three or four miles since the replacement, and no harsh shifts, just the unexpected downshift and the forward in neutral and reverse, of course both highly unexpected. I was looking at doing this as an adventure, sorta, and I might have selected a beginner mountain. Will P |
Originally Posted by Will P
(Post 1315024)
When I filled it, it didn't take but about 8.5 quarts, and I know what it's supposed to hold but though some came out of the torque converter, it looked to be a pint at most. I pray that is what it is, I haven't driven it but three or four miles since the replacement, and no harsh shifts, just the unexpected downshift and the forward in neutral and reverse, of course both highly unexpected. I was looking at doing this as an adventure, sorta, and I might have selected a beginner mountain. Will P
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Originally Posted by Will P
(Post 1315031)
I might study it a bit to see if I can rig me a all four wheels off the ground way to fill it, I'd feel much safer, do you think that would be better... Will P
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The proper procedure is to have the car off the ground and level. Four jackstands at the jacking support points would be best for those without a lift.
If you put the fill plug back when the transmission is at the max. temp. there will be less fluid than at the min. I attempt to start the plug at 30 deg C. |
Originally Posted by Bcrary3
(Post 1315036)
I would see if there is a shop that you can rent a bay at a shop with a rotary lift.
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Originally Posted by RJ237
(Post 1315040)
The proper procedure is to have the car off the ground and level. Four jackstands at the jacking support points would be best for those without a lift.
If you put the fill plug back when the transmission is at the max. temp. there will be less fluid than at the min. I attempt to start the plug at 30 deg C. Also good to know. Please keep up with me, I appreciate the input. I'm gonna have to enlist my friend to help reposition it. Thank so much, Will |
Originally Posted by Will P
(Post 1315231)
Sounds like the right thing, I just cranked it with all brakes on, and there was no hint of a forward or reverse... Any ideas appreciated. I'm trying to get all the info and insight before I involve a professiona, I wish motorcarman was nearby. Will P
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I am not a transmission guy, so i am going out on a limb: I think you need to order the new valve body and then take the transmission down and redo it. Something inside is not right (bolt not torqued, shaft not seated sufficiently, etc). Low or wrong fluid wouldn't cause the creeping problem in park. I would concentrate on those items that change when the shifter position changes.
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Thanks Jhartz
Originally Posted by Jhartz
(Post 1315815)
I am not a transmission guy, so i am going out on a limb: I think you need to order the new valve body and then take the transmission down and redo it. Something inside is not right (bolt not torqued, shaft not seated sufficiently, etc). Low or wrong fluid wouldn't cause the creeping problem in park. I would concentrate on those items that change when the shifter position changes.
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Would it damage pulling it backward
Would it damage my transmission if I pulled it backward with a chain from a pickup truck. It is stuck in drive in all positions, and turns only forward except in park in which it stops both ways and having tried to push it backward out of the driveway with two bodies, it moves a few inches then stop. My problem is that the jag is in my driveway by my house on packed gravel (and my efforts to day that were precarious and my only exit is backward. I don't want to cause futher damaging something. If I cant do that I guess it would take a tow setup that could pull the rear end off the ground
I had decided not to try to top up the fluid because of the danger of where I have it, the way it pulls forward against itself , the surface of the ground and my beat up ole body. I'm still deciding on my next move..... Any Ideas........ Will |
You need to rent an auto dolly -- if you can find one. Jack up the back, slip the dolly under, move where you want. Barring that, the tow truck.
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Originally Posted by Jhartz
(Post 1315965)
You need to rent an auto dolly -- if you can find one. Jack up the back, slip the dolly under, move where you want. Barring that, the tow truck.
Thanks Jim, I hadn't thought of a dolly, duh. That or the tow truck. Will |
Pull back solution
Well I found a couple of dolly's at harbour freight, and i'll get 4 sheets (will have to shuffle them constantly) of the pressed wood 4'x8' to enable rolling. If I get it back far enough I can drive it forward in a loop, back to the street and I can put it there til I find a decent mechanic or make a decision.. Will P
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This sounds very like the problem I had when I rebuilt my gearbox a few years ago. In my case it was simply that the selector rod had not been engaged properly internally (the assembly instructions I was using didn't mention that!).
The mechanical notches that you feel when selecting different gears comes from the selector. It does not mean that that the rod inside is actually moving things around. Just drop the sump and check, it's got to be worth a look. |
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