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Transmission Discussion of preventative/corrective maintenance and other technical issues regarding your coach's transmission.

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  #21  
Old 1 Week Ago
Richiebug Richiebug is offline
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Dieselbird01...Thank you for the clarification on posting!!

I did not have a successful trip yesterday, sadly!
1)the big round plug on the curbside of the transmission was pristine for being 30+ yrs old---cleaned, greased with dielectric grease, replugged, started up and same lights and light sequence (5, 4).
while up under we checked and followed the wire harness.......nothing obvious.
2)inside---carefully took apart the shifter pad, disconnected, cleaned, regreased, reconnected--------same results
3)tried the ATEC module.....disconnected cleaned regreased reconnected
4)tried N, D, R 3x
5)tried turning off and on fast 5X
6)never had it in high idle
7) I have 13.9V coming in
"still no go"!!

We are going to have it towed up to the W W Williams in Conley/Atlanta
I have a tow question and will try again with posting.

Thank you all again for all the great suggestions!! I'm hoping for something simple.....but prepared for the worst!!
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Thomaston, GA
1991 WB
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  #22  
Old 1 Week Ago
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Dieselbird01 Dieselbird01 is offline
John Wyatt – Administrator/Moderator
 
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Quote:
Originally Posted by Richiebug View Post
Dieselbird01...Thank you for the clarification on posting!!

I did not have a successful trip yesterday, sadly!
1)the big round plug on the curbside of the transmission was pristine for being 30+ yrs old---cleaned, greased with dielectric grease, replugged, started up and same lights and light sequence (5, 4).
while up under we checked and followed the wire harness.......nothing obvious.
2)inside---carefully took apart the shifter pad, disconnected, cleaned, regreased, reconnected--------same results
3)tried the ATEC module.....disconnected cleaned regreased reconnected
4)tried N, D, R 3x
5)tried turning off and on fast 5X
6)never had it in high idle
7) I have 13.9V coming in
"still no go"!!

We are going to have it towed up to the W W Williams in Conley/Atlanta
I have a tow question and will try again with posting.

Thank you all again for all the great suggestions!! I'm hoping for something simple.....but prepared for the worst!!
Hi Richie,

If you haven't already had it towed, there's an ECU oil pressure switch, under the coach between the starter and the rear bumper, that Randy Dupree asked me about a few days ago. Randy asked if I thought the ECU oil pressure switch would keep your coach from shifting out of neutral. I don't think it would, but just in case, I'll go ahead and mention it. That oil pressure switch is supposed to "close" when the engine starts and builds oil pressure. It might be worth putting a jumper across that pressure switches' terminals to see if the transmission will shift normally.

This link has a picture that Dave Stokes posted a while back, showing the ECU oil pressure switch location on an older coach:

https://www.wanderlodgeownersgroup.c...74&postcount=7
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John Wyatt - Admin
Titusville, Florida
1991 40' WLWB-WTB 8V92
Body Number F095567
My Location: http://www.bbirdmaps.com/user1.cfm?user=4

1991 40' WB ...From 2008 - Present
1984 ½ PT-36 .From 2000 - 2008
1973 FC-31 .....From 1991 - 2001
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  #23  
Old 1 Week Ago
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atckip atckip is offline
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Before you tow, you might want to talk to Transmission instruments in TX. They might have some idea. It certainly will be cheaper to let them look at your CPU vs the tow to Williams.
They rebuilt my CPU and it was pretty painless. I did have different codes and issues.
(972) 353-8286
https://www.transmissioninstruments.com/
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95 WB42 S-60
88 WB40 2010-14
Brooks, GA
...my buddy Cody
678-523-7920
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  #24  
Old 1 Week Ago
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cdamen cdamen is offline
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Quote:
Originally Posted by Dieselbird01 View Post
Hi Richie,

If you haven't already had it towed, there's an ECU oil pressure switch, under the coach between the starter and the rear bumper, that Randy Dupree asked me about a few days ago. Randy asked if I thought the ECU oil pressure switch would keep your coach from shifting out of neutral. I don't think it would, but just in case, I'll go ahead and mention it. That oil pressure switch is supposed to "close" when the engine starts and builds oil pressure. It might be worth putting a jumper across that pressure switches' terminals to see if the transmission will shift normally.

This link has a picture that Dave Stokes posted a while back, showing the ECU oil pressure switch location on an older coach:

https://www.wanderlodgeownersgroup.c...74&postcount=7
John is it possible that same pressure switch would keep the red light on at the N button on the shifter pad? if so do you have a part number?
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DeLand, FL. 32720
1993 WB40
1987 FC35 Sold
1973 GMC Motorhome Sold
804-426-1592
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  #25  
Old 1 Week Ago
Richiebug Richiebug is offline
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Thank you all again!! I will try a jumper on the ECU oil pressure switch and will call the transmission instruments folks in TX. Again thank you for all these great ideas!!
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Thomaston, GA
1991 WB
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  #26  
Old 1 Week Ago
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Dieselbird01 Dieselbird01 is offline
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Quote:
Originally Posted by cdamen View Post
John is it possible that same pressure switch would keep the red light on at the N button on the shifter pad? if so do you have a part number?
Hi Chris,

Yes, it has caused that problem on several coaches.

The original ECU oil pressure switch is listed as:

SWITCH, OIL PRESSURE, 3 PSI. KYSOR 1042-24900-03

But... there should be other switches that would work... just keep in mind that it's a normally OPEN switch.

These two threads may help:

https://www.wanderlodgeownersgroup.c...ad.php?t=15327


https://www.wanderlodgeownersgroup.c...ad.php?t=33444
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John Wyatt - Admin
Titusville, Florida
1991 40' WLWB-WTB 8V92
Body Number F095567
My Location: http://www.bbirdmaps.com/user1.cfm?user=4

1991 40' WB ...From 2008 - Present
1984 ½ PT-36 .From 2000 - 2008
1973 FC-31 .....From 1991 - 2001
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  #27  
Old 6 Days Ago
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Randy Dupree Randy Dupree is offline
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Quote:
Originally Posted by Dieselbird01 View Post
Hi Richie,

If you haven't already had it towed, there's an ECU oil pressure switch, under the coach between the starter and the rear bumper, that Randy Dupree asked me about a few days ago. Randy asked if I thought the ECU oil pressure switch would keep your coach from shifting out of neutral. I don't think it would, but just in case, I'll go ahead and mention it. That oil pressure switch is supposed to "close" when the engine starts and builds oil pressure. It might be worth putting a jumper across that pressure switches' terminals to see if the transmission will shift normally.

This link has a picture that Dave Stokes posted a while back, showing the ECU oil pressure switch location on an older coach:

https://www.wanderlodgeownersgroup.c...74&postcount=7

Thanks John for posting about that OP switch.
Something about that switch has been bugging me,i know what Jim N's problem was,but i sold a 93WB a long time ago and it was a bus i had bought from an estate,on the way home with it i had that "do not shift" light come on and it would not go in any gear.
All i could do was shut the engine down and try it again and it did finally go in gear and it worked all the way home,but after i sold it it happened to the new owner and he took it to George Morris (RIP) and George changed a switch under the bus,according to the new owner.
The fix only took a few minutes and the owner was not a mechanic and he never investigated what switch george changed.
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  #28  
Old 6 Days Ago
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cdamen cdamen is offline
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Thanks, John.
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Chris and Roe Damen
DeLand, FL. 32720
1993 WB40
1987 FC35 Sold
1973 GMC Motorhome Sold
804-426-1592
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  #29  
Old 6 Days Ago
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Dieselbird01 Dieselbird01 is offline
John Wyatt – Administrator/Moderator
 
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Quote:
Originally Posted by cdamen View Post
Thanks, John.
Sure.

Be careful not to short any of the wires on that pressure switch to ground. I think one of them will have battery voltage on it even if the A/T switch is off...
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Titusville, Florida
1991 40' WLWB-WTB 8V92
Body Number F095567
My Location: http://www.bbirdmaps.com/user1.cfm?user=4

1991 40' WB ...From 2008 - Present
1984 ½ PT-36 .From 2000 - 2008
1973 FC-31 .....From 1991 - 2001
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