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05-07-2017, 09:08 PM
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#1
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Name: adamg
Title: Rookie
Status: Not Here
Join Date: Jun 2012
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Posts: 6
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3-2 downshift with converter locked
finishing up rebuild of my 47rh all that is left is the vb.
i have figured out the 2nd gear lockup and 4-3 downshift with converter locked but what about 3-2 downshift with converter locked? also any info on 1st gear lockup
i have been searching for days with little success
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05-07-2017, 09:13 PM
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#2
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Name: Redrider2911
Title: Too Much Time
Status: Not Here
Join Date: Nov 2015
Location: Yakima, WA
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Posts: 780
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My RH will downshift from 3-2 with the torque converter locked when moving the selector from D to 2. I can also get it to kickdown to 2nd if I floor the pedal at a low RPM in 3rd. It however will not automatically downshift when rolling to a stop.
__________________
49 Willys Pickup. 5600lb. 11.8sec @115mph 1/4. 12 valve. MegaSquirted 47RH. 3.54 posi rear. 35" tires. 64mm HE351ve, S475 (75/96/1.32), A/W Intercooler. AFC mods. 5x16s. 191 DVs, 180 pump. 23*. 85psi. Build Thread
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05-08-2017, 06:36 AM
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#3
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Name: jasonc
Title: Too Much Time
Status: Not Here
Join Date: Nov 2009
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Posts: 4,396
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Why do you want it to stay locked on the downshift, your gonna break chit.
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05-08-2017, 07:37 AM
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#4
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Name: BigPapa
Title: Truckless
Status:
Here
Join Date: Jan 2008
Location: Springfield, TN
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Posts: 5,010
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From what I've been told, locked downshifts are bad.
__________________
Scott
2003 Avalanche Z71
Common sense is like deodorant. The people that need it most never use it.
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05-08-2017, 08:43 AM
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#5
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Name: adamg
Title: Rookie
Status: Not Here
Join Date: Jun 2012
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Posts: 6
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i live in the mountains and use exhaust brake...i want to be able to gear down locked up ready for descent....under no throttle conditions
good or bad. right or wrong i just want to know what i need to do to make this happen. a stock vb will not do this...aftermarket vbs are advertised with these options but i guess its a little known trick. if i breaks it ill just have to fix it again...im not scared and have the parts to do it
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05-08-2017, 08:45 AM
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#6
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Name: adamg
Title: Rookie
Status: Not Here
Join Date: Jun 2012
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Posts: 6
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i only am running a single disk and did not make the torque converter lockup super aggressive...it will work for me as long as im not stupid about it
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05-08-2017, 08:46 AM
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#7
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Name: adamg
Title: Rookie
Status: Not Here
Join Date: Jun 2012
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Posts: 6
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Quote:
Originally Posted by Redrider2911
My RH will downshift from 3-2 with the torque converter locked when moving the selector from D to 2. I can also get it to kickdown to 2nd if I floor the pedal at a low RPM in 3rd. It however will not automatically downshift when rolling to a stop.
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yours must be moddified..did you build it or buy it? im not looking for automatic shift..i want to be able to drop it in 2 with converter locked when i tell it to
Last edited by adamg; 05-08-2017 at 08:47 AM.
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05-08-2017, 08:47 AM
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#8
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Name: RascalMafia
Title: heyyyyyyy girrrrrrrl
Status: Not Here
Join Date: Apr 2007
Location: Middle GA
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Posts: 5,511
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I once had a vb that would downshift with the converter locked. Broke a chitload of billet shafts. Why not just unlock via switch, downshift, and use the switch to lock the converter back up in a lower gear?
Sent from my SAMSUNG-SM-G930A using Tapatalk
__________________
'18 Chevy 2500
'14 Cruze Diesel
'04 Lincoln Towncar
'01 F350 7.3 / ZF6
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05-08-2017, 09:44 AM
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#9
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Name: adamg
Title: Rookie
Status: Not Here
Join Date: Jun 2012
Member`s Gallery
Posts: 6
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Quote:
Originally Posted by RascalMafia
I once had a vb that would downshift with the converter locked. Broke a chitload of billet shafts. Why not just unlock via switch, downshift, and use the switch to lock the converter back up in a lower gear?
Sent from my SAMSUNG-SM-G930A using Tapatalk
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thats what i do now..just trying to make it a little simpler. i would image your shifting it with a load on it or have a really agressive setup to be breaking things. i have my trans setup to hold power but not have neck breaking shifts. its not a race truck
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05-08-2017, 02:29 PM
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#10
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Name: Redrider2911
Title: Too Much Time
Status: Not Here
Join Date: Nov 2015
Location: Yakima, WA
Member`s Gallery
Posts: 780
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I would honestly advise against locked downshifts as well, especially when towing something. The only reason I know mine does it is because I drove around with the TCC hard wired to ground while I was testing things out before I had a switch. All I can say is it IS hard on stuff. A locked 2-3 and 1-2 would chirp both rear tires even at a low rpm downshift.
I built my valvebody using a transgo shift kit and I welded up the hole in the separator plate myself to get 2nd gear lockup (same mod as JB weld in the channel, just cleaner). The transmission will not downshift from 4th with the converter locked. I would have to go to neutral, turn off overdrive; then go back to D to get to 3rd. Then manually downshift from there.
__________________
49 Willys Pickup. 5600lb. 11.8sec @115mph 1/4. 12 valve. MegaSquirted 47RH. 3.54 posi rear. 35" tires. 64mm HE351ve, S475 (75/96/1.32), A/W Intercooler. AFC mods. 5x16s. 191 DVs, 180 pump. 23*. 85psi. Build Thread
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05-08-2017, 02:36 PM
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#11
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Name: SCHMITTY
Title: Not enough time
Status: Not Here
Join Date: Jun 2012
Location: K beach, AK
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Posts: 1,177
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I thought you have to flip the orientation of a spring and valve. I've read of it before on this forum.
__________________
stock 94
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05-08-2017, 02:39 PM
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#12
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Name: SCHMITTY
Title: Not enough time
Status: Not Here
Join Date: Jun 2012
Location: K beach, AK
Member`s Gallery
Posts: 1,177
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Google "manual 2nd gear lockup" and read through all the results that are from comp d. I think the way to do it was mentioned in one of those threads. I think it was youngguns15
__________________
stock 94
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05-08-2017, 06:26 PM
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#13
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Name: adamg
Title: Rookie
Status: Not Here
Join Date: Jun 2012
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Posts: 6
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Quote:
Originally Posted by SCHMITTY
I thought you have to flip the orientation of a spring and valve. I've read of it before on this forum.
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for 4-3 locked you flip the converter timing valve and spring around
i may hardly use these mods but would nice to be able to have the capability if i ever wanted to do so
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05-08-2017, 08:13 PM
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#14
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Name: 12vCumminsFTW
Title: Too Much Time
Status: Not Here
Join Date: Dec 2010
Location: Willcox, AZ
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Posts: 1,377
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My Goerend downshifts 3-2 locked, no breakage. Takes some throttle manipulation to not be jerky as **** tho
__________________
-Aaron H.
97 12v 4x4
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