What rpm does the allison usually shift at? [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums
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: What rpm does the allison usually shift at?

makeyoufamous
04-10-2005, 10:00 PM
I would like to know at what rpm's the tranny shifts from 3,4,5. Is there a difference in tow haul.
Thanks
ratlover
04-11-2005, 10:29 AM
Yes big difference between regular and TH. TH should be around 2500 even at low and medium throttle, regular with a lite foot you should be in the 1800 range or so. 3200 at WOT regardless TH or regular
GMCSID
04-11-2005, 12:46 PM
Shift Speed (1-2 and 2-3 Shifts)

<TABLE width="100%" border=1><TBODY><TR><TH vAlign=center align=middle colSpan=3>



</TH><TH vAlign=center align=middle colSpan=4>1-2 Shift Output Shaft RPM



</TH><TH vAlign=center align=middle colSpan=4>2-3 Shift Output Shaft RPM



</TH></TR><TR><TH vAlign=center align=middle colSpan=2>



</TH><TH vAlign=center align=middle>% of TPS



</TH><TH vAlign=center align=middle>12



</TH><TH vAlign=center align=middle>25



</TH><TH vAlign=center align=middle>50



</TH><TH vAlign=center align=middle>100



</TH><TH vAlign=center align=middle>12



</TH><TH vAlign=center align=middle>25



</TH><TH vAlign=center align=middle>50



</TH><TH vAlign=center align=middle>100



</TH></TR><TR><TH vAlign=center align=middle colSpan=2>Engine



</TH><TH vAlign=center align=middle>Mode



</TH><TH vAlign=center align=middle colSpan=4>



</TH><TH vAlign=center align=middle colSpan=4>



</TH></TR><TR><TD vAlign=center align=middle>L18



</TD><TD vAlign=center align=middle>8.1L



</TD><TD vAlign=center align=middle>Normal



</TD><TD vAlign=center align=middle>462



</TD><TD vAlign=center align=middle>636



</TD><TD vAlign=center align=middle>1040



</TD><TD vAlign=center align=middle>1300



</TD><TD vAlign=center align=middle>867



</TD><TD vAlign=center align=middle>1127



</TD><TD vAlign=center align=middle>1792



</TD><TD vAlign=center align=middle>2312



</TD></TR><TR><TD vAlign=center align=middle>L18



</TD><TD vAlign=center align=middle>8.1L



</TD><TD vAlign=center align=middle>Tow/Haul



</TD><TD vAlign=center align=middle>722



</TD><TD vAlign=center align=middle>722



</TD><TD vAlign=center align=middle>1040



</TD><TD vAlign=center align=middle>1300



</TD><TD vAlign=center align=middle>1445



</TD><TD vAlign=center align=middle>1445



</TD><TD vAlign=center align=middle>1792



</TD><TD vAlign=center align=middle>2370



</TD></TR><TR><TD vAlign=center align=middle>LB7



</TD><TD vAlign=center align=middle>6.6L



</TD><TD vAlign=center align=middle>Normal



</TD><TD vAlign=center align=middle>462



</TD><TD vAlign=center align=middle>462



</TD><TD vAlign=center align=middle>491



</TD><TD vAlign=center align=middle>780



</TD><TD vAlign=center align=middle>838



</TD><TD vAlign=center align=middle>838



</TD><TD vAlign=center align=middle>925



</TD><TD vAlign=center align=middle>1503



</TD></TR><TR><TD vAlign=center align=middle>LB7



</TD><TD vAlign=center align=middle>6.6L



</TD><TD vAlign=center align=middle>Tow/Haul



</TD><TD vAlign=center align=middle>607



</TD><TD vAlign=center align=middle>607



</TD><TD vAlign=center align=middle>607



</TD><TD vAlign=center align=middle>809



</TD><TD vAlign=center align=middle>1272



</TD><TD vAlign=center align=middle>1272



</TD><TD vAlign=center align=middle>1272



</TD><TD vAlign=center align=middle>1618



</TD></TR></TBODY></TABLE>

Shift Speed (3-4, 4-5 and CT Downshifts)

<TABLE width="100%" border=1><TBODY><TR><TH vAlign=bottom align=middle colSpan=3>



</TH><TH vAlign=bottom align=middle colSpan=3>3-4 Shift Output Shaft RPM



</TH><TH vAlign=bottom align=middle colSpan=3>4-5 Shift Output Shaft RPM



</TH><TH vAlign=center align=middle colSpan=4>Closed Throttle Downshift Output Shaft RPM



</TH></TR><TR><TH vAlign=bottom align=middle colSpan=3>



</TH><TH vAlign=bottom align=middle colSpan=3>



</TH><TH vAlign=bottom align=middle colSpan=3>



</TH><TH vAlign=center align=middle>5-4



</TH><TH vAlign=center align=middle>4-3



</TH><TH vAlign=center align=middle>3-2



</TH><TH vAlign=center align=middle>2-1



</TH></TR><TR><TH vAlign=center align=middle colSpan=2>



</TH><TH vAlign=center align=middle>% of TPS



</TH><TH vAlign=center align=middle>12



</TH><TH vAlign=center align=middle>25



</TH><TH vAlign=center align=middle>50



</TH><TH vAlign=center align=middle>12



</TH><TH vAlign=center align=middle>25



</TH><TH vAlign=center align=middle>50



</TH><TH vAlign=center align=middle>0



</TH><TH vAlign=center align=middle>0



</TH><TH vAlign=center align=middle>0



</TH><TH vAlign=center align=middle>0



</TH></TR><TR><TH vAlign=center align=middle colSpan=2>Engine



</TH><TH vAlign=center align=middle>Mode



</TH><TH vAlign=center align=middle colSpan=3>



</TH><TH vAlign=center align=middle colSpan=3>



</TH><TH vAlign=center align=middle colSpan=4>



</TH></TR><TR><TD vAlign=center align=middle>L18



</TD><TD vAlign=center align=middle>8.1L



</TD><TD vAlign=center align=middle>Normal



</TD><TD vAlign=center align=middle>1185



</TD><TD vAlign=center align=middle>1474



</TD><TD vAlign=center align=middle>2370



</TD><TD vAlign=center align=middle>1647



</TD><TD vAlign=center align=middle>2081



</TD><TD vAlign=center align=middle>3237



</TD><TD vAlign=center align=middle>1517



</TD><TD vAlign=center align=middle>1243



</TD><TD vAlign=center align=middle>766



</TD><TD vAlign=center align=middle>202



</TD></TR><TR><TD vAlign=center align=middle>L18



</TD><TD vAlign=center align=middle>8.1L



</TD><TD vAlign=center align=middle>Tow/Haul



</TD><TD vAlign=center align=middle>2023



</TD><TD vAlign=center align=middle>1965



</TD><TD vAlign=center align=middle>2399



</TD><TD vAlign=center align=middle>2875



</TD><TD vAlign=center align=middle>2774



</TD><TD vAlign=center align=middle>3352



</TD><TD vAlign=center align=middle>2167



</TD><TD vAlign=center align=middle>1532



</TD><TD vAlign=center align=middle>1040



</TD><TD vAlign=center align=middle>202



</TD></TR><TR><TD vAlign=center align=middle>LB7



</TD><TD vAlign=center align=middle>6.6L



</TD><TD vAlign=center align=middle>Normal



</TD><TD vAlign=center align=middle>1127



</TD><TD vAlign=center align=middle>1127



</TD><TD vAlign=center align=middle>1199



</TD><TD vAlign=center align=middle>1589



</TD><TD vAlign=center align=middle>1589



</TD><TD vAlign=center align=middle>1705



</TD><TD vAlign=center align=middle>1387



</TD><TD vAlign=center align=middle>1040



</TD><TD vAlign=center align=middle>694



</TD><TD vAlign=center align=middle>202



</TD></TR><TR><TD vAlign=center align=middle>LB7



</TD><TD vAlign=center align=middle>6.6L



</TD><TD vAlign=center align=middle>Tow/Haul



</TD><TD vAlign=center align=middle>1676



</TD><TD vAlign=center align=middle>1676



</TD><TD vAlign=center align=middle>1676



</TD><TD vAlign=center align=middle>2539



</TD><TD vAlign=center align=middle>2539



</TD><TD vAlign=center align=middle>2539



</TD><TD vAlign=center align=middle>2110



</TD><TD vAlign=center align=middle>1561



</TD><TD vAlign=center align=middle>1098



</TD><TD vAlign=center align=middle>202



</TD></TR></TBODY></TABLE>



The LLY charts are exactly the same.
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