Modulator Connected

1984 Pontiac Bonneville Brougham, 5.7 N, 200-4R/MW9SECTION Modulator Connected

With vehicle stationary (service brake on), engine speed set to maintain 16 in. Hg absolute manifold pressure, and vacuum modulator tube CONNECTED, transmission control pressure should be approximately as shown in CONTROL PRESSURE SPECIFICATIONSΒ  .

CONTROL PRESSURE SPECIFICATIONS

Range @ RPM (Model Code) Modulator Connected psi (kg/cm2 ) Modulator Disconnected psi (kg/cm2 )
"D" @ 1000 (1)
XP, XD 51-58 (3.6-4.1) 137-158 (9.6-11.1)
WK 55-64 (3.9-4.5) 143-164 (10.1-11.5)
XH, XK 55-64 (3.9-4.5) 119-139 (8.4-9.8)
L2 or L1 @ 1000 (1)
XP, XD 73-85 (5.1-6.0) 137-158 (9.6-11.1)
WK 80-93 (5.6-6.5) 144-166 (10.1-11.7)
XH, XK 82-96 (5.8-6.7) 119-139 (8.4-9.8)
"R" @ 1000 (1)
XP, XD 77-89 (5.4-6.3) 219-250 (15.4-17.6)
WK 83-97 (5.8-6.8) 216-249 (15.2-17.5)
XH, XK 88-106 (6.2-7.5) 239-269 (16.8-18.9)
"N" @ 1000 (1)
XP, XD 51-58 (3.6-4.1) 137-158 (9.6-11.1)
WK 55-64 (3.9-4.5) 143-164 (10.1-11.5)
XH, XK 55-66 (3.9-4.6) 119-139 (8.4-9.8)
(1) Total running time for this combination of tests not to exceed 2 minutes.
CLUTCH & BAND APPLICATIONS

Selector Lever Position Elements In Use
"D" Drive
First Gear Forward Clutch & Low/Reverse Roller Clutch
Second Gear Forward Clutch & Intermediate Band
Third Gear Direct Clutch & Forward Clutch
"2" Intermediate
First Gear Forward Clutch & Low/Reverse Roller Clutch
Second Gear Forward Clutch & Intermediate Band
"1" Low Forward Clutch, Low/Reverse Clutch & Low/Reverse Roller Clutch
"R" Reverse Forward Clutch, Low/Reverse Clutch
Neutral Or Park (1)
(1) Band and clutches released and/or ineffective.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.