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Old 10-15-2017, 04:42 PM   #1
Schoust
 
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Built trans and still having downshift issues

Ok Guys been a while since I have posted up but felt the best place to ask is right here. So my truck 95 12v now my sons truck has a built trans with all of the goodies except the billet output. The truck had a partially built trans when I had it and the problem has always been the downshifting. The trans has a Goerand valve body which has been recently updated billet in and intermediate
And all other performance parts and mods In between. After the refresh the issues continue. That is the downshift. The trans is an Rh all is new now Gov has been checked and is perfect. The only thing left is to replace the darn Tv cable which to me seems just fine?? What are we missing here? The builder has been doing this forever and knows Mopar trans. Like the back of his hand Goerand speaks for itself.
As far as adjusting the Tv we have done that in the transmissions first build over and over and now in its second over and over. Guys this stuff ain't Rocket Science! What are we missing??
Thanks
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Old 10-15-2017, 04:46 PM   #2
Kryp2nitE

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Built trans and still having downshift issues

What exactly is it doing or not doing? 2-1 downshift, 3-2? 4-3? It doesn’t kick down quick enough or not at all?

Do you have a TPS or are you using a Pot?

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Old 10-15-2017, 05:19 PM   #3
Schoust
 
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The truck has had an issue when coming to a full stop downshifting to 1st. I built the trans years ago after modding. My son has the truck and is getting ready to significantly increase the power so he thought that he would freshen with billet shafts and send the VB back to Goerand for the latest. Low and behold he trans is behaving in a similar manner as before as fas as downshifting goes. Now I know my way around the Tv cable and have played with it over and over not sure what goes...Need to straighten this out before We go any further.
The tv seems to move perfectly what are we missing here??
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Old 10-15-2017, 05:32 PM   #4
Schoust
 
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The truck down shifts from 4 to 3 no problem but downshifting from 3 to 2 or 2 to 1 is non existent. When you manually move the shifter on the column it down shifts to the selected gear but it will not do it on its own in drive. Pulling hills or slowing down for corners it never down shifts lower than third no matter how slow you are going. Coming to a complete stop is the only way to get it to go back to first on its own when drive is selected and when that happens you get a noticeable (but not crazy) jolt.
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Old 10-16-2017, 02:57 PM   #5
Redrider2911

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2nd gear lock up mods? Torque converter lockup switch? That would stop a downshift if the TCC is staying locked.
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Old 10-18-2017, 12:36 AM   #6
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Try externally tying the TV lever to the half throttle position with a wire or zip tie. If the truck downshifts great, drop the pan the turn in the minimum TV set screw to match the external 1/2 throttle adjustment, then remove the external wire and put the pan back on and refill with fluid.

Play with the external wire/minimum set throttle position until you find the setting you like most (great downshifts, doesn't hang up-shifts when cruising in your neighborhood, and doesn't shift so hard your teeth crunch). Then drop the pan and do the permanent internal minimum TV adjustment.
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Old 10-18-2017, 01:18 PM   #7
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Quote:
Originally Posted by Big Blue24 View Post
Try externally tying the TV lever to the half throttle position with a wire or zip tie. If the truck downshifts great, drop the pan the turn in the minimum TV set screw to match the external 1/2 throttle adjustment, then remove the external wire and put the pan back on and refill with fluid.

Play with the external wire/minimum set throttle position until you find the setting you like most (great downshifts, doesn't hang up-shifts when cruising in your neighborhood, and doesn't shift so hard your teeth crunch). Then drop the pan and do the permanent internal minimum TV adjustment.
Did this with mine along with making the tv lever 1" longer and it downshift way easier. It's still a mopar trans though so don't get your expectations too high, lol.
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Old 10-18-2017, 03:50 PM   #8
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Quote:
Originally Posted by Big Blue24 View Post
Try externally tying the TV lever to the half throttle position with a wire or zip tie. If the truck downshifts great, drop the pan the turn in the minimum TV set screw to match the external 1/2 throttle adjustment, then remove the external wire and put the pan back on and refill with fluid.

Play with the external wire/minimum set throttle position until you find the setting you like most (great downshifts, doesn't hang up-shifts when cruising in your neighborhood, and doesn't shift so hard your teeth crunch). Then drop the pan and do the permanent internal minimum TV adjustment.
On my puller I adjusted the TV screw so it would go no lower than approx 50% throttle, that way if the TV cable ever broke, I would have some decent line pressure still. It hung a little on the up shifts, but since it saw the petal buried to the floor most of the times, I figured the cable would break on me .
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Old 10-18-2017, 08:16 PM   #9
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Ok so if I tie the tv arm at 50% and it fixes my issue what does that mean was wrong with The trans, To low pressure at idle to even make down shift? When I tie it in place do I just make the wire hold it from returning past 50% and still leave the tv cable hooked up and allow it to pull the arm further when I give it throttle or do I just disconnect the tv cable all together and tie the arm at 50%? Last thing, this is fine to do for my applicaton? The trucks a weekend street toy lots of around town/highway driving and I'm not light on the pedal either lol. Sorry for all the questions but it's nice to have someone with answers! Thanks.
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Old 10-18-2017, 08:44 PM   #10
jasonc

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Nothing out of the normal with your trans, there is a preset screw to hold the tv lever forward if you drop the pan, just make sure you know how far you want to adjust it out. It did better at 50% but it might be better at a little less, may just need a couple turns. You need to keep the tv cable hooked up so it pulls the lever all the way back when your running it hard.
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Old 10-30-2017, 03:50 PM   #11
dpaqu

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I have a slightly different trans than yours but the same symptoms. Its a 46rh I rebuilt in a 93D250. I've been told I could have a mushroomed valve in the valve body. I jacked up the back of the truck and ran it through the gears with pressure tester on all the different ports. It has double the line pressure of stock which is what I would expect given the fact I have the transgo kit in it.

Probably going to have to drop the trans pan and check the valve body again. Ugh.
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Old 10-30-2017, 07:57 PM   #12
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welcome to dodge autos my 47re would short shift and not down shift to the proper gear.. I fixed the short shift with the tp delete and the down shift... I gave up I just manually shift the column usually if I'm slowing down to stop then the light turns green, I have to go to manual 2 other wise I take off in 3rs gear @20ish mph
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Old 10-30-2017, 07:58 PM   #13
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I think the piston or cyl that's on the end of the tv lever is scored up
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Old 11-03-2017, 04:37 AM   #14
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Quote:
Originally Posted by Schoust View Post
Ok so if I tie the tv arm at 50% and it fixes my issue what does that mean was wrong with The trans, To low pressure at idle to even make down shift? When I tie it in place do I just make the wire hold it from returning past 50% and still leave the tv cable hooked up and allow it to pull the arm further when I give it throttle or do I just disconnect the tv cable all together and tie the arm at 50%? Last thing, this is fine to do for my applicaton? The trucks a weekend street toy lots of around town/highway driving and I'm not light on the pedal either lol. Sorry for all the questions but it's nice to have someone with answers! Thanks.
After playing with the minimum adjustment externally with a wire, you'll learn where you like the minimum set. Then drop the pan and adjust the minimum TV screw inward until it barely touches the TV lever foot at your tested/discovered favorite setting, then remove the external wire, put pan back on, and you're all set. And if you're adding a bunch of power, make sure it throttles up to full throttle when the go-pedal is full throttle or you'll hurt the tranny fairly quickly.
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