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11-20-2018, 08:53 PM
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#1
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Name: coorsman2005
Title: i like beer
Status: Not Here
Join Date: Jun 2011
Location: blackwell,ok
Member`s Gallery
Posts: 784
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48re issue 1st gear literally locked up
Ok like the title says this is the trans I swapped in my 08 in my sig. It recently decided that its gonna start in 2nd gear. Shifts great other then starting off in 2nd.
So I unhooked the electrical and manually put the truck in 1st. It's like it's in park. Wont do anything. Tried it a cpl times. Its locked.
Hooked the electrical back up put it in drive takes off in 2nd but shifts great reverse is good. Except the fact I have 2 parks lol.
What's the thoughts.
__________________
08 3500 qcsb 6.7 6 speed manual, valair DD, all deletes efi live, arp studs&rocker studs, Vulcan hg w/orings, max spool valve springs, max spoolpush rods, SB66.
2008 megacab 4x4 dually 12v build in progress
1990 2wd d100 4bt nv5600 vailair single disk in progress
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11-20-2018, 10:26 PM
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#2
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Name: Big Blue24
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Jan 2008
Location: Cedar City, UT
Member`s Gallery
Posts: 6,310
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If you add throttle in manual 1st, does it build boost and load up the engine against the torque converter? Or does it free rev like true park or neutral?
__________________
95' 2wd Junker Drag Truck
1502 HP Fuel-Only 12mm P7100 Pump
SXE 472 over GTX55 116mm
OEM 12v Block
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11-20-2018, 10:57 PM
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#3
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Name: coorsman2005
Title: i like beer
Status: Not Here
Join Date: Jun 2011
Location: blackwell,ok
Member`s Gallery
Posts: 784
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Sorry I should have said that a little different.
Yes with added throttle it loads up to build boost. It will not rev like neutral or park. Forgot to mention if it matters it does have billet input shaft and triple disk sun coast if that matters
__________________
08 3500 qcsb 6.7 6 speed manual, valair DD, all deletes efi live, arp studs&rocker studs, Vulcan hg w/orings, max spool valve springs, max spoolpush rods, SB66.
2008 megacab 4x4 dually 12v build in progress
1990 2wd d100 4bt nv5600 vailair single disk in progress
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11-20-2018, 11:30 PM
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#4
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Name: apples24v
Title: Green Behind the Ears
Status: Not Here
Join Date: Mar 2012
Location: bradenton, FL
Member`s Gallery
Posts: 68
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Possibly a dirty pressure governor?
__________________
06 QCLB 85% over ii pump under fleece cp3k, 130% ii injectors, 62 under s475, Suncoast Trans, efi, GDP Mega Rail, Fluidampr
01 QCLB 5-speed, Valair ceramic single disk, quad adrn, DDP 150's,Tunnel ram, pusher manifold, 3.5' piping, AEM intake, Fluidampr, 08+ steering
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11-21-2018, 10:17 AM
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#5
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Name: coorsman2005
Title: i like beer
Status: Not Here
Join Date: Jun 2011
Location: blackwell,ok
Member`s Gallery
Posts: 784
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If it was a shifting problem I could see that. But not when it shifts great. And first gear is like a line lock on a drag car
__________________
08 3500 qcsb 6.7 6 speed manual, valair DD, all deletes efi live, arp studs&rocker studs, Vulcan hg w/orings, max spool valve springs, max spoolpush rods, SB66.
2008 megacab 4x4 dually 12v build in progress
1990 2wd d100 4bt nv5600 vailair single disk in progress
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11-21-2018, 06:50 PM
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#6
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Name: coorsman2005
Title: i like beer
Status: Not Here
Join Date: Jun 2011
Location: blackwell,ok
Member`s Gallery
Posts: 784
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What other thoughts
__________________
08 3500 qcsb 6.7 6 speed manual, valair DD, all deletes efi live, arp studs&rocker studs, Vulcan hg w/orings, max spool valve springs, max spoolpush rods, SB66.
2008 megacab 4x4 dually 12v build in progress
1990 2wd d100 4bt nv5600 vailair single disk in progress
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11-22-2018, 08:17 AM
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#7
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Name: T-MAN
Title: misunderstood
Status: Not Here
Join Date: Sep 2008
Member`s Gallery
Posts: 352
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I had a similar problem on my 03. put the truck in drive and I would have a bind. Go to first still a bind... Shift from first to neutral, count to 3 and back to drive and it would shift normal until overdrive. If I kept overdrive off it wouldn't shift to overdrive, if I let it go to overdrive it wouldn't come out even turning it off. Changed pcm checked all wiring, turned out to be a cross leak in the valvebody.
Are you sure its taking off in second and not third? could feel 2 shifts 3rd, 3rd locked then forth? Heres why im asking
forward clutches applied 1-4th but not reverse. (hydraulic)
2nd band only second (hydraulic)
direct clutches applied, reverse, 3rd and overdrive ( hydraulic)
overdrive clutches (electric over hydraulic)
When you put the truck in manual low the REAR band and Forward clutches apply. To have a bind DIRECT would also have to be applied.
For reverse (that you said is working) its only REAR BAND and DIRECT clutches, FORWARD let go.
Second would be FORWARD clutches and INTERMEDIATE band.
Third FORWARD and DIRECT and for overdrive OVERDRIVE clutches.
Best guess is that if the direct drum was set up to tight, welded together or not shimmed correctly and fell off the input hub it would cause this. Or a cross leak that is charging the direct drum.
If direct cluches were welded solid you would still have reverse, neutral, third and overdrive and never notice a problem in those gears.. just my 2cents hope you find the issue Trevor
__________________
2001.5 ppump allison 11.399@ 117.90 6850#
1997 rcsb 12v 6.7 9.38 @ 146.54
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11-30-2018, 01:37 PM
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#8
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Name: coorsman2005
Title: i like beer
Status: Not Here
Join Date: Jun 2011
Location: blackwell,ok
Member`s Gallery
Posts: 784
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Well t man. Seems you know these trannys pretty well. I'm pretty sure your exactly right. Taking off in 3rd and feeling lock up and 4th. Think I have decided to swap mine back to manual. But I'm still going to pull the trans apart. And attempt to fix it I have another sitting here in the shop that lost reverse but the rest acted great. So we shall see
__________________
08 3500 qcsb 6.7 6 speed manual, valair DD, all deletes efi live, arp studs&rocker studs, Vulcan hg w/orings, max spool valve springs, max spoolpush rods, SB66.
2008 megacab 4x4 dually 12v build in progress
1990 2wd d100 4bt nv5600 vailair single disk in progress
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