Allison 5sp: p0842

A_T_Ver

A_T_Ver

Member
Jul 31, 2007
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Threw a 0842 code last night. Didn't turn the CEL on, but i scanned it anyway. The 3>4 shift will not happen until i let off, every other gear is fine. It goes out of 3rd and revs until i let out then shifts to 4th. Looking through threads looks like the PSM? Fuel filter, spin on, internal filter and fluid has all been changed.
 
A_T_Ver

A_T_Ver

Member
Jul 31, 2007
416
0
16
Oh shit Mike, threw a 0776 code tonight :eek:! Dropped pan, no clutch material, fluid a little dark though. Checked PSM, o-rings are in place, replaced with new one though. No longer just a spin on fix.

It goes 1 2 3, i have to let off to hit 4th and then 5th is fine. Still luckily have 4 and 5 though! Is this a burned clutch pack?
 
C

Cougar281

Well-known member
Sep 11, 2006
1,820
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83
St Louis, MO
A_T_Ver said:
Oh shit Mike, threw a 0776 code tonight :eek:! Dropped pan, no clutch material, fluid a little dark though. Checked PSM, o-rings are in place, replaced with new one though. No longer just a spin on fix.

It goes 1 2 3, i have to let off to hit 4th and then 5th is fine. Still luckily have 4 and 5 though! Is this a burned clutch pack?
Click to expand...

Oh dear... I hate to say it, but that sounds VERY familiar with the "same" trans... You're right, no longer just a spin-on fix. Time for a rebuild :(
 
Mike L.

Mike L.

Got Sheep?
Staff member
Vendor/Sponsor
Aug 12, 2006
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Fullerton CA
A_T_Ver said:
Oh shit Mike, threw a 0776 code tonight :eek:! Dropped pan, no clutch material, fluid a little dark though. Checked PSM, o-rings are in place, replaced with new one though. No longer just a spin on fix.

It goes 1 2 3, i have to let off to hit 4th and then 5th is fine. Still luckily have 4 and 5 though! Is this a burned clutch pack?
Click to expand...

Time to contact your trans builder. This does not sound good. Looks like we have bad C2 clutches and problems in the C1/C2 drum.
 
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