Tcm Malfunction Not Reading Gears A4 B5
09-06-201401:41 AM #i
Established Fellow member 2 Rings 
01 1.8t transmission problem
we recently replaced a transmission in a 01 1.8t.
car is a tiptronic, it is quattro.
we hooked everything support, filled it with ATF correctly heated it up to 40�C
cycled thru the gears and everything.
when it started I slowly backed information technology out of the barn,
drove information technology around the barn (barns perhaps 35' past 45')
drove it down the driveway maybe 350'
it got out of get-go and into second
and when I slowed down to turn on the street I came to a consummate stop and when I went to take off nothing. car just wouldn't go anymore. No loud noise nothing
nosotros scanned it and we got lawmaking P0730
incorrect gear ratio.
the fluid in it is not dirty equally in the fluid is fresh.
the only thing my buddy didn't do was take off the old torque converter the bolts were stripped on it.
what I'k asking is,
why won't this thing drive!!!
if the torque converter was bad wouldn't the lawmaking come back?
likewise wouldn't nosotros of felt it slip right abroad?
wouldn't the code come back?
when we were doing output test it checked all the solenoids and all of them said short to ground and ane of em said short or open up to ground. we rechecked the fluid it'due south at the right level. both the sensors are connected properly, the auto knows when it'southward in p r n d,
it'due south reading when the brakes pressed in, everything is working fine, just the mode it's suppose to exist.
(we have another tip one.8t that nosotros were able to scan and it's showing the aforementioned values in the same places)
when you are in the measuring blocks
group 5 or 6 has iii options
solenoid 1, solenoid 2 and gear selected.
solenoid ane has a constant Ten while solenoid ii has a O or X occasionally, the gear selected always says 1 or 4 when you put it in 4 which is below drive.
does that hateful solenoid 1 is bad? or it'due south just non reading?
information technology says 1 in p r n and d.
when y'all put information technology in 4 iii 2 it changes accordingly.
should I bank check the tcm?
if I do where is at? underneath the passenger side?
the auto ended upwardly in our hands cause this child busted the tranny pan hill jumping.. not on purpose though. this is what I got told when I came on with the projection. The kid bought the manual from somewhere we don't know where, we have no groundwork info on the tranny. would all the fluid coming out cause the torque converter to become bad? he close the car off immediately after it impacted the ground.
is it possible the new tranny is junk?
should nosotros recheck all the grounds on the car?
again car is a 1.8T quattro tiptronic
and it is facelift, that's why I asked where the tcm is at.
thanks in advance guys.
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09-06-201404:46 AM #2
Veteran Member Three Rings 
There is a lot to cover here and I'm no transmission expert but afterward reading this I nonetheless have a few questions.
ane) When you press the accelerator when the motorcar is in drive and the automobile "doesn't get" what exactly happens. Does the engine rev up? or does the auto merely Stall?
ii) Have you tried to manually shift gears or utilise Due south mode? Whatever difference
3) When yous said you didn't remove the old torque converter do you mean the onetime one on the engine attached to the flywheel?
4) How did you marshal the ii slots on the torque converter fluid pump shaft with the prongs on the trans if you left the converter attached to the engine?
To answer your other questions:
Without knowing the condition of the "new" trans it is totally and entirely possible that there is something wrong with the replacement.
While it'due south possible that the torque converter is bad I call up the lawmaking is more likely the result if a hydraulic or electrical problem within the manual. If you did not align the shaft properly on the converter when installing the new trans you could have damaged the fluid pump which could explain why yous are not downshifting, simply a bad solenoid could have the same effect.
If you lot are not getting a reading from solenoid 1 in VCDS I would probably starting time your troubleshooting there. Perhaps swap the one from the quondam transmission and exam again.
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09-06-201410:32 AM #3
Established Member Two Rings
the engine simply revs up when you lot press the gas pedal.
we're going to try to drive information technology in Due south mode today again, I can't call up if we did that yesterday or not.
and aye the one that was attached to the engine.
I wasn't at that place when he got the tranny attached to the block.
I'm pretty positive he knew he had to align something, did he do it? im non sure only I'll ask.
the onetime trans is locked upwards. would anything still be useable from at that place?
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09-06-2014ten:32 AM #4
Established Member Two Rings
it revs up in all gears p r d four iii 2
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09-06-201412:08 PM #5
Veteran Member Iii Rings
If the torque converter slots on the converter was not aligned with the tabs behind the seal information technology's possible that the spline would take engaged but the fluid pump may have been damaged.
You lot could disconnect one of the trans cooler lines and meet if you are pumping fluid. If not that'south your problem.
The fact that yous are non getting any valve errors seems to betoken to something hydraulic.
I'thou just guessing here.
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09-06-201401:58 PM #half dozen
Established Member Two Rings
he did align information technology. that's the only manner the transmission volition bolt upward. he has some other 1.8t nosotros have to piece of work on and we scanned it. and the solenoids take 1's in the boxes and the tranny that's in the car has O and X's and so we're dead set on information technology being bad solenoids. so we're going to pull autonomously the old i and run across if the solenoids are bad.
quick question,
is in that location a way to tell bad solenoids.
and our valve error was saying curt to plus. iirc so hopefully the solenoids can set it.
I volition report back when we know for future reference!
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09-06-201403:20 PM #seven
Veteran Member Four Rings 
Reading through, my guess was incorrectly installed converter and the pump is broken as a result. It is mutual for them to piece of work for a while before the stress is enough to break the pump completely.
I don't know about the 0's and i's. Just I think VCDS tin can exercise a output test on all the solenoids. So if you do that and tin can hear each of them click, everything is probably ok there. I would pull a cooler line off and meet if you take a pump left.
^Don't heed to this guy, he's not fifty-fifty a mechanic.
2001 Laser Blood-red A4 one.8TQM, five-Speed Swapped, 4.11 Final Bulldoze, APR 93, 2.v" Exhaust, ST Coilovers, 034 RSB, A8 Brakes Forepart & Rear
2006 Passion Red Volvo V50 T5 AWD 6MT
2000 Satin Argent Passat i.8T FWD Wagon, Slippy Tiptronic, xv" Hubcaps
1999.v Aluminum Silver Metallic A4 Avant 1.8TQTS (wintertime sled)
09-06-201403:47 PM #8
Veteran Fellow member Iii Rings
01 1.8t transmission problem
Try checking if the pump is working first, because if you need to go deeper you will need to drain the fluid and drop the pan.
If you do need to drop the pan then like Walkey said you tin can employ VCDS to activate the individual solenoids. From below the car you lot can hear them click and even exam for voltage at the connector. If you have voltage then pull the plug and exam the solenoid with an ohm meter. If there is no continuity the roll may exist damaged. If the curlicue is good the solenoid may be mechanically damaged
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Last edited by Toolaa; 09-07-2014 at 05:59 AM.
09-08-201411:03 PM #ix
Established Member Ii Rings
Ive been trying to find a good write upwards for a tip tran removal. Is there whatsoever tips/communication that might come up in handy for this job.
09-09-201405:59 AM #10
Veteran Member 4 Rings
You'll probably notice expert info about removing the auto trans in the v-speed swap DIY'due south.
Rip that crap out and don't expect dorsum.
^Don't heed to this guy, he's non even a mechanic.
2001 Laser Red A4 1.8TQM, 5-Speed Swapped, 4.eleven Terminal Drive, Apr 93, 2.5" Exhaust, ST Coilovers, 034 RSB, A8 Brakes Front & Rear
2006 Passion Crimson Volvo V50 T5 AWD 6MT
2000 Satin Argent Passat i.8T FWD Carriage, Slippy Tiptronic, 15" Hubcaps
1999.v Aluminum Silver Metallic A4 Avant 1.8TQTS (winter sled)
09-09-201406:22 AM #eleven
Established Member 2 Rings
Just something piece of cake to cheque is to make certain your drive axles are securely mounted and engaged at the joints. two months ago I swapped in a used OEM beam for a Chinaxle thinking I was doing good. two miles downwardly the road information technology would not pull away from the red lite. No noise, clunk, etc. Turns out the inner CV joint on one side pulled apart within the boot. Replaced it and skilful to become.
09-10-201412:26 PM #12
Established Member Two Rings
we volition endeavor checking the pump. cause we tin hear the solenoids click from outside the car. if you pull a libation line and the pump is still working, would at that place be fluid coming out? how do yous know if it notwithstanding works or not?
I don't think the axles are the trouble. would the car still move, if they fell autonomously inside?
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09-10-201412:31 PM #13
Established Member Ii Rings
an easy style to pull out a tip. just pull the motor out with it.
my buddy dropped just the transmission and it was and then hard putting it back in. non worth information technology. simply yeah pull it out and don't look back.
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09-11-201405:42 PM #15
Veteran Member Three Rings
Originally Posted by AudiholicA4 
we will attempt checking the pump. cause we can hear the solenoids click from exterior the motorcar. if you pull a cooler line and the pump is notwithstanding working, would at that place be fluid coming out? how do you know if information technology all the same works or not?
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Disconnect the libation lines only below the turbo. Use a clean container to catch the fluid, you need to put this back in when you are washed the test.
Connect a 2ft peice of clear hose to the two lines with some clamps to bypass the libation.
Starting time the machine and you lot should immediately encounter fluid flowing through the hoses at a very high charge per unit. If you use a 1/2" clear hose I would expect the flow to exist at least 6 to x inches per 2d. If the fluid is not moving at all or moving very slowly then it'southward the pump gear.
Since the torque converter was left on the engine it's very difficult to align the two prong of the converter with the two teeth on the spur gear for the pump. You can push the converter onto the bell housing almost all the way. If the teeth are not aligned when you tighten the bolts down that hold he tranny to the engine the the teeth will curve and boom into the shaft. While I'thou speculating here this could explain your failure. You said that you started the car like normal, then drove the car a very short altitude then it simply stopped moving. If the shaft was smashed into the gear teeth it may have had plenty friction to turn the pump and at some point the teeth simply sheered off now the torque converter simply spinning inside of the gear so no more fluid is pumping through the converter.
09-13-201403:09 AM #16
Established Member Two Rings
thanks for that general.
and thanks for the guide Toolaa
later on reading what yous said that makes a lot of sense. I'g going to brand him pull the motor out and put the new converter on.
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09-13-201403:11 AM #17
Established Member Two Rings
I don't think the tcu is bad. because it's working just fine, it knows what gears were in, knows when the brakes being pressed in, etc, we'll pull it out and check the converter, and once nosotros do I'll post here to allow people know!
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01-22-201507:30 AM #18
Established Fellow member Two Rings
tardily of an update.
the new transmission was junk. the shop that the tranny came from wouldn't warranty it. the guy we were fixing it for showed upwards to get the motorcar and threatened my buddy with lawyers if he didn't give the car back and accept 60% less than what he got told he was getting paid. total crap.
just but do business with people yous know.
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01-22-201507:31 AM #nineteen
Established Member Two Rings
and that was subsequently the car sat in his driveway for 4 months and the kid never responded to any text or calls.
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01-22-201507:49 AM #20
Veteran Member Four Rings
So, the front gear on the pump is not broken? It really sounds like that is what happened hither. Pics?
^Don't listen to this guy, he's non even a mechanic.
2001 Laser Ruddy A4 1.8TQM, 5-Speed Swapped, 4.eleven Final Drive, April 93, 2.five" Exhaust, ST Coilovers, 034 RSB, A8 Brakes Front & Rear
2006 Passion Red Volvo V50 T5 AWD 6MT
2000 Satin Silver Passat 1.8T FWD Wagon, Slippy Tiptronic, fifteen" Hubcaps
1999.5 Aluminum Silver Metallic A4 Avant 1.8TQTS (winter sled)
Source: https://www.audizine.com/forum/showthread.php/614558-01-1-8t-transmission-problem
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