518 delayed 2-3 shift woes continue
#929638
02/15/11 05:05 PM
02/15/11 05:05 PM
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Joined: Oct 2005
Posts: 1,305 Lakewood, Colorado
herkamer
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Still chasing this problem. I'm at a loss here...
Fresh 518 rebuild with maybe 300 miles on it now. 1-2 shift is fine. 2-3 takes much longer. Actual shift is ok, just delayed. Transgo shift kit installed to RV/Truck spec, 3.8 KD lever. Even with the KD linkage off it's delayed, usually around 25-30 or sometimes even 35 mph at light throttle. When I assembled the trans everything was air tested and it sounded like the pistons were engaging correctly. All seals and rings were replaced.
What else could be causing this? Incorrect front band adjustment? Could the seals not be installed correctly? OD/LU solenoids leaking? Sticky valve in the VB?
I'd really prefer not to remove the entire unit to repair, but it gets annoying when it won't shift. Makes it even harder to tune the fuel injection when it holds 2nd gear. Any diagnosis tips would be very helpful.
Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more
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Re: 518 delayed 2-3 shift woes continue
[Re: herkamer]
#929639
02/15/11 05:40 PM
02/15/11 05:40 PM
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Joined: Jan 2003
Posts: 25,757 Rio Linda, CA
John_Kunkel
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Does throttling back make it shift?
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Re: 518 delayed 2-3 shift woes continue
[Re: John_Kunkel]
#929640
02/15/11 05:50 PM
02/15/11 05:50 PM
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Joined: Oct 2005
Posts: 1,305 Lakewood, Colorado
herkamer
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No. You can run it up to where it should shift, let off and it will still hang in 2nd. It takes going up to a higher speed to shift. Looks like about 2000 or so rpm from my EFI datalogs.
Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more
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Re: 518 delayed 2-3 shift woes continue
[Re: herkamer]
#929641
02/15/11 05:58 PM
02/15/11 05:58 PM
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Joined: Jan 2003
Posts: 25,757 Rio Linda, CA
John_Kunkel
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Were the governor pressure solenoid and sensor replaced at overhaul?
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Re: 518 delayed 2-3 shift woes continue
[Re: John_Kunkel]
#929642
02/15/11 05:59 PM
02/15/11 05:59 PM
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Joined: Oct 2005
Posts: 1,305 Lakewood, Colorado
herkamer
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Hydraulic version. Only solenoids are OD and LU
Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more
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Re: 518 delayed 2-3 shift woes continue
[Re: herkamer]
#929643
02/15/11 10:52 PM
02/15/11 10:52 PM
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Joined: Oct 2009
Posts: 276 Temecula, Ca.
zzyzxpat
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Your problem is the Transgo Kit. Very common. Did you install the spring and trim the throttle valve? Transgo builds alot of good stuff, but there are alot of concerns with the shift timing when the Torqueflite stuff is used. Pat
" The last official act of any goverment, is to loot the treasury" George Washington
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Re: 518 delayed 2-3 shift woes continue
[Re: zzyzxpat]
#929644
02/15/11 11:07 PM
02/15/11 11:07 PM
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Joined: Oct 2005
Posts: 1,305 Lakewood, Colorado
herkamer
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Followed the kit directions to the letter for a mild truck/RV type build. No 1-2 governor valve, nor did I install the green TV spring. I didn't grind anything except the 4 land switch valve, and filed the VB where the manual valve goes in.
Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more
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Re: 518 delayed 2-3 shift woes continue
[Re: 383man]
#929647
02/16/11 06:54 PM
02/16/11 06:54 PM
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Joined: Jan 2003
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JohnRR
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Quote:
Seen alot of trouble with the front clutch drum causing the delayed 2-3 shift also at the dealer. We would replace the drum and piston and that would fix it. Ron
Was that because the drum has the inner seal groove cut too deep? there is a replacement seal to make up for this .
Op , do you notice a delayed reverse engagement ?
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Re: 518 delayed 2-3 shift woes continue
[Re: 383man]
#929648
02/16/11 08:38 PM
02/16/11 08:38 PM
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Joined: Jan 2003
Posts: 25,757 Rio Linda, CA
John_Kunkel
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The faulty clutch drums will usually shift if the throttle is lifted.
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Re: 518 delayed 2-3 shift woes continue
[Re: John_Kunkel]
#929650
02/16/11 11:17 PM
02/16/11 11:17 PM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
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Quote:
The faulty clutch drums will usually shift if the throttle is lifted.
Evently they will shift but some took longer then the feeling of just to much throttle pressure. Mopar had us put the updated drum and piston in them. Ron
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Re: 518 delayed 2-3 shift woes continue
[Re: 383man]
#929651
02/18/11 02:03 AM
02/18/11 02:03 AM
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Joined: Oct 2005
Posts: 1,305 Lakewood, Colorado
herkamer
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@ Kunkel- Have checked governor pressure for Transgo tech support guys. It is approx 1 psi per MPH, rises and falls smoothly according to speed. From everything I've read this is normal.
@ JohnRR - No delayed reverse engagement. The trans works great aside from 2-3 shift.
@ bronzebee - no idea how many miles were on the trans. It was a builder with the OD fried that I bought and rebuilt, so any VB wear is unknown and completely possible.
@383man - Broke the original front drum while pressing new bushing in (d'oh!), replaced with a good used unit. Not sure this matters but may be pertinent to know
Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more
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Re: 518 delayed 2-3 shift woes continue
[Re: JohnRR]
#929653
02/19/11 03:53 PM
02/19/11 03:53 PM
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Joined: Aug 2003
Posts: 1,062 Amherst,NY
challengermike
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Amherst,NY
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Quote:
Quote:
Seen alot of trouble with the front clutch drum causing the delayed 2-3 shift also at the dealer. We would replace the drum and piston and that would fix it. Ron
Was that because the drum has the inner seal groove cut too deep? there is a replacement seal to make up for this .
Op , do you notice a delayed reverse engagement ?
I guess you would have to know what seal was installed,they still give you both seals in the rebuild kit.You just have to know to install the deeper one.But usually after the trans warms up it will start to shift on time after the seal expands.
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Re: 518 delayed 2-3 shift woes continue
[Re: challengermike]
#929654
02/19/11 04:21 PM
02/19/11 04:21 PM
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Joined: Oct 2005
Posts: 1,305 Lakewood, Colorado
herkamer
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I'm not sure, didn't know there was 2 different seals. Don't believe I had any leftover seals..I will look in a bit. Shift timing never improves cold or hot.
Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more
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Re: 518 delayed 2-3 shift woes continue
[Re: herkamer]
#929655
02/19/11 04:40 PM
02/19/11 04:40 PM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
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Is the shift delayed in auto/drive mode, manual shift mode or both? How many front clutch springs are you using, and did you install the restrictor from the shift kit into the trans case? What type of front band material, and is it adjusted correctly? I would try loosening the front band adjustment about 1/4 turn first, because that would be the easiest thing to check/adjust. You may have alot of seal leakage in the front clutch circuit, could be the pump to drum rings, or even the front servo leakage (you did put the seal ring in the servo cover?) If the shift is slow even in manual mode, then if the restrictor was used in the case, I would remove it, and the front clutchs should apply quicker.
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Re: 518 delayed 2-3 shift woes continue
[Re: 451Mopar]
#929656
02/19/11 04:48 PM
02/19/11 04:48 PM
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Joined: Oct 2005
Posts: 1,305 Lakewood, Colorado
herkamer
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Quote:
Is the shift delayed in auto/drive mode, manual shift mode or both? Both
How many front clutch springs are you using, and did you install the restrictor from the shift kit into the trans case? However many were in the stock drum, memory seems to want to say 12. Yes, restrictor is installed
What type of front band material, and is it adjusted correctly? Stock type front band. Not sure on the adjustment, it is set to what Transgo calls for in the shift kit manual.
you did put the seal ring in the servo cover? Yes, all seals/rings were replaced.
Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more
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