Howdy! My name is John and I live in Texas. I have an 87 740 Turbo with over 235,000 on the clock. My main problem is that the four speed tranny is stuck in third gear, the dash arrow is constantly lit and the tach reads 3500 at 70 mph. HELP!!!!!!!!! I really don't care if the little button on the left side of the shift arm ever works again or if the arrow ever goes off, as long as I can just get the tranny to shift through all four gears. If y'all help me solve this one, I have a few others to add to the list. The speeometer works and then doesn't work. Hit a bump just right and it starts again. The turbometer does the same. However, one thing at a time Any tranny tricksters out there that know what I need to do?
John.
740 Turbo four speed stuck in third gear. Topic is solved
John:
I have submitted several posts related to the overdrive problem. This is common to the 240 and 740 series from the early 80's to the 90's. Search on my author name TAFinley and you'll see the posts. Basically, there are three things that can fail: Overdrive relay, overdrive solenoid, and the wiring between the relay and the solenoid. Check my posts. One of these days I'll have to send Matt a full article on this that he can put up.
I have submitted several posts related to the overdrive problem. This is common to the 240 and 740 series from the early 80's to the 90's. Search on my author name TAFinley and you'll see the posts. Basically, there are three things that can fail: Overdrive relay, overdrive solenoid, and the wiring between the relay and the solenoid. Check my posts. One of these days I'll have to send Matt a full article on this that he can put up.
Tom Finley
'97 854 T-5
'85 245 GL
'97 854 T-5
'85 245 GL
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bloonman
TAFinley,
I have cruised through all your posts and there is good advice there. Is there not a way to just get the solenoid to stick in the on position and not have the problem of not shifting into forth gear any longer? Why fix it every four years if you can make it work once for all time ... or the life of the car, whichever comes first?
John.
I have cruised through all your posts and there is good advice there. Is there not a way to just get the solenoid to stick in the on position and not have the problem of not shifting into forth gear any longer? Why fix it every four years if you can make it work once for all time ... or the life of the car, whichever comes first?
John.
Tom Finley
'97 854 T-5
'85 245 GL
'97 854 T-5
'85 245 GL
John:
Here are three things you can do:
1. Remove the OD relay and connect a jumper between the two pins that supply power to the OD solenoid so that the OD solenoid has constant power; ie, OD always on. This will work if the problem is the OD relay.
2. Run a wire from the battery to the OD solenoid so that it is always on. This will work if the problem is either the OD relay or the wiring from the relay to the solenoid.
3. Not for the faint of heart -- Follow the procedure in this link. This will create a channel in the solenoid for the trans fluid to flow through constantly. The OD will always be on and you can forget about all electrical issues. Of course, there will be no way to turn the OD off if you need to.
http://www.brickboard.com/RWD/index.htm?id=914458
I hope this helps. I pass these workarounds on for info only and do not endorse any of them. Proceed at your own risk.
Here are three things you can do:
1. Remove the OD relay and connect a jumper between the two pins that supply power to the OD solenoid so that the OD solenoid has constant power; ie, OD always on. This will work if the problem is the OD relay.
2. Run a wire from the battery to the OD solenoid so that it is always on. This will work if the problem is either the OD relay or the wiring from the relay to the solenoid.
3. Not for the faint of heart -- Follow the procedure in this link. This will create a channel in the solenoid for the trans fluid to flow through constantly. The OD will always be on and you can forget about all electrical issues. Of course, there will be no way to turn the OD off if you need to.
http://www.brickboard.com/RWD/index.htm?id=914458
I hope this helps. I pass these workarounds on for info only and do not endorse any of them. Proceed at your own risk.
Tom Finley
'97 854 T-5
'85 245 GL
'97 854 T-5
'85 245 GL
-
bloonman
TAFinley,
I thought about running a jumper wire from the headlight relay to the tranny solenoid so that there would be no drain on the battery when the car was not running, but did not know if that circuit would handle the added strain. If you think that it will, this would be the easiest way to go . . . provided the solenoid does still work properly. If, however the headlight circuit will not carry the extra load and since I am elecrically challenged anyway, I think that I will probably then use the "final solution" and fix it once and for all with the channel between the two holes on the solenoid. If I have to go that route I will let you know how easy/difficult it turns out to be or about any problems I encounter. It sure sounds like the way to go. I have made many a VW Beetle and van do things that the experts said would never work or would wreck the vehicle, so I am not intimidated by the procedure described. In fact, to be completely honest, to me, it seems to be the least worrisome solution of all.
John.
I thought about running a jumper wire from the headlight relay to the tranny solenoid so that there would be no drain on the battery when the car was not running, but did not know if that circuit would handle the added strain. If you think that it will, this would be the easiest way to go . . . provided the solenoid does still work properly. If, however the headlight circuit will not carry the extra load and since I am elecrically challenged anyway, I think that I will probably then use the "final solution" and fix it once and for all with the channel between the two holes on the solenoid. If I have to go that route I will let you know how easy/difficult it turns out to be or about any problems I encounter. It sure sounds like the way to go. I have made many a VW Beetle and van do things that the experts said would never work or would wreck the vehicle, so I am not intimidated by the procedure described. In fact, to be completely honest, to me, it seems to be the least worrisome solution of all.
John.
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surfbug1
- Posts: 195
- Joined: 13 September 2006
- Year and Model: 1998 V70, 2006 S80
- Location: Tysons Corner VA
- Has thanked: 41 times
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do the soloenoids ever go bad?
I have 12 volts at the connection under the trans tunell....couldnt measure right at the solonoid, but thta wire looks good
the relay is clicking, and the 12 v there
I can run another wire....12volts to the solenoid, would it make a difference< ?
in other words, could it be that the solenoid needs more currect to click open, or is it just shot...
any one else out there have a bad solenoid, or do they rarely fail?
thanks!
big al
I have 12 volts at the connection under the trans tunell....couldnt measure right at the solonoid, but thta wire looks good
the relay is clicking, and the 12 v there
I can run another wire....12volts to the solenoid, would it make a difference< ?
in other words, could it be that the solenoid needs more currect to click open, or is it just shot...
any one else out there have a bad solenoid, or do they rarely fail?
thanks!
big al
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louisspain
- Posts: 1
- Joined: 1 May 2008
- Year and Model:
- Location:
The most effective and ineffective solution is to buy a $29.95 OD Solenoid bypass from IPD. It is simple to install, but very hard to get at. It is a very tight space. It took me 2 hours to complete the 15 minute installation.
The worse that can happen is you take it to a trusted mechanic to install. A new solenoid cost almost $200 and is not necessary in the first place! Unless you frequently tow very heavy loads up mountains, you have probably never tried to lock the car into 3rd.
I did it and it works just fine.
The worse that can happen is you take it to a trusted mechanic to install. A new solenoid cost almost $200 and is not necessary in the first place! Unless you frequently tow very heavy loads up mountains, you have probably never tried to lock the car into 3rd.
I did it and it works just fine.
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