View Single Post
Old 11-02-2019, 12:12 AM   #10 (permalink)
gumby79
Master EcoModder
 
gumby79's Avatar
 
Join Date: Dec 2014
Location: Butte, Montana
Posts: 717

little jona - '91 Dodge D 250 first gen cummins LE
Team Streamliner
90 day: 23.4 mpg (US)

Little Jona airo modded - '91 Dodge RAM 3/4 TON D 250 24 AUTO
Pickups
Team Cummins
90 day: 18.5 mpg (US)

The Salted Hound Jenny. - '87 Dodge Ram 50/D-50 5sp 4X4
90 day: 20.24 mpg (US)

Jona Allison aero - '91 Dodge Ram D-250 Le
90 day: 21.86 mpg (US)
Thanks: 207
Thanked 418 Times in 271 Posts
I had 2 options with my Allison 6sp install.
1 GM style, soft and squishy 1-5(1stOD) 5-6 locked shift
2 Allison style, 1-2,lock 3-6 locked shifts
GM went this way for a soft fill not longevity or controlling excessive heat.
Allison, went for longevity @ up to 26k lbs.
Ether way the TCM adjusts the apply and release solenoids timing(when) and rate (how much time it takes each) to make smooth shifts independent of controlling line pressure. Uncontrollable line pressure WILL destroy the trans with extremely violent shifts as timing and rate alone are inadequate.

Read up on how your particular trans controlls shift firmness. A shift kit may be the better option.
__________________
1st gen cummins 91.5 dodge d250 ,HX35W/12/6 QSV
ehxsost manafulld wrap, Aero Tonto
best tank: distance 649gps mi 24.04 mpg 27.011usg
Best mpg : 31.32mpg 100mi 3.193 USG 5/2/20


Former
'83 GMC S-15 Jimmy 2door 2wd O/D auto 3.73R&P
'79 Chevy K20 4X4 350ci 400hp msd custom th400 /np205. 7.5-new 14mpg modded befor modding was a thing
87' Hyundai Excel
83 ranger w/87 2.9 L FI2wd auto 18mpg on the floor
04 Mitsubishi Gallant 2.4L auto 26mpg
06 Subaru Forrester XT(WRX PACKAGE) MT AWD Turbocharged 18 plying dirty best of 26mpg@70mph
95Chevy Blazer 4x4 auto 14-18mpg
04 Chevy Blazer 4x4 auto 16-22mpg


  Reply With Quote