| [GMCnet] Remote Transmission Dipstick Calibration [message #241590] |
Wed, 26 February 2014 20:15  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma:
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Senior Member |
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G'day,
I called Manny and ran this past him and he blessed it.
REMOTE TRANSMISSION DIPSTICK CALIBRATION
You will need the following items to perform this procedure:
1) Three ton jack stands - 2 ea.
2) Rags
3) Oil drain pan
4) Tool capable of removing existing marks on transmission dipstick
5) Tool capable of remarking transmission dipstick
6) Half inch (1/2") socket, extension, and ratchet to remove / reinstall modulator retainer
7) Transmission fluid
Procedure:
Comments: before you start this procedure look at the driver side of the transmission and locate the modulator (Ref: Parts Book 78Z
- TRANSMISSION - Pg. 17-2 Key 6 Modulator.
NOTE: You need to do the checking fairly quickly after stopping when the engine and transmission are HOT!
1) Park your GMC on a level surface
2) Set the parking brake
3) Set the suspension system to TRAVEL
4) Start the engine and allow coach to reach TRAVEL height
5) Depress the brake pedal
6) Cycle the transmission lever through all the positions back and forth several times slowly
7) Return the transmission to PARK
8) Leave the engine running and check the fluid level of the transmission
9) The fluid level should be at the "COLD" line if not slowly and carefully fill the transmission to that level
10) Get back in the coach and drive it long enough for the engine and transmission to come to normal operating temperature
11) Park the GMC on a level surface
12) Put the transmission in Park and set the parking brake
13) With the engine running check the fluid level of the transmission; if it's not on the HOT mark continue as below
14) Shut the engine off and place jack stands under the frame so that if a torsion bar were to fail you won't get crushed.
15) Be careful from this point onwards not to burn yourself on the HOT exhaust pipes
16) Place a drain pan under the modulator on the passenger side of the transmission
17) Remove the rubber vacuum line
18) Remove the bolt that holds the modulator retainer to the transmission using the half inch socket, extension, and ratchet
19) Remove the modulator (be careful it will be HOT)
20) Allow fluid to drain into the pan until it just drips (be careful, the fluid will be HOT!)
21) If fluid does not drip out add it slowly until it does
22) Re-install the modulator, hose, and retaining screw
23) Remove the drain pan and jack stands
24) Get back in the GMC, start the engine and drive the GMC until the engine and transmission are at normal operating temperature
25) Park the GMC on a level surface
26) Set the hand brake and put the transmission in Park
27) Check the level on the dipstick, it should be at or near the "HOT" mark; if not note where it is
28) Remove the existing "HOT" mark on the dipstick and mark it at the correct level
29) Allow the transmission to cool overnight
30) Start the engine the next day and cycle the transmission lever through all the positions back and forth several times slowly
31) Check the level on the dipstick, it should be at or near the "COLD" mark; if not note where it is
32) Remove the existing "COLD" mark on the dipstick and mark it at the correct level
If I missed anything or what I've written isn't clear PLEASE let me know.
Regards,
Rob M.
USAussie
Sydney, Australia
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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