Celebrity V6-173 2.8L VIN X 2-bbl (1985)
Four of the lube holes have been eliminated. When the lube holes are eliminated, the rollers are less likely to cock or skew when overrunning.
When the rollers cock or skew, excessive heat is created. Reference Dealer Service Bulletin No. 90-196-7A.
1A.
To increase the lubrication to the 3rd roller clutch assembly, a 3rd roller clutch dam
was added and the input housing shaft I.D. 4th clutch shaft seal was eliminated. This change occurred for the 1985-1/2 model year. Reference pages 1-7
and 1-8 in the Hydra-matic 440-T4 Product Update book (1985 through 1987 model year).
2.
New Output Shaft With A Single Path Bearing: The new output shaft and bearing allows more lubrication fluid to flow to the center of the
gearbox. Reference Dealer Service Bulletin No. 90-196-7A.
3.
New 10 Plate 3rd Clutch Assembly For SOP 1989: The 10 plate clutch assembly, compared to the previous 8 plate clutch assembly, is for higher
torque engine applications and also helps eliminate heat build-up due to numerous repeat manual Lo engagements at speeds around 35 MPH.
Reference Dealer Service Bulletin No. 89-45-7A.
4.
End Plays: If the final drive has too much clearance, this will allow the final drive sun gear to move away from the thrust bearing in the final drive.
This will allow too much lube fluid to leak out from the final drive sun gear shaft - with the correct final drive end play, the sun gear would block
most of the lube fluid from escaping from the sun gear shaft. If the input housing has too much clearance, this would allow too much lubrication
fluid to leak out between the input housing thrust bearing and 3rd roller clutch cam. Some leakage is designed in, but too much due to worn,
damaged, missing bushings, too much end play or incorrectly installed parts could cause a durability concern. Reference the lubrication circuit
fluid flow description, Figure 1.
5.
The final drive sun gear lube groove must face towards the parking gear to allow adequate lubrication flow to the final drive pinions. The final
drive sun gear shaft has lubrication holes in the shaft that feed fluid into the step in the sun gear, then through the two slots in the parking gear to
the final drive pinions - if the final drive sun gear was installed backwards, the holes in the final drive sun gear shaft would be blocked, not
allowing fluid to lubricate the final drive pinions.
6.
Check lube pipes for correct installation and any damage (plastic cracked, pipes bent, etc.). Ensure the lube pipe retainer is in the proper position.
A mispositioned or damaged component will leak lubrication fluid into the bottom pan instead of directing the fluid to the center of the gearbox.
While bolting down the accumulator cover, inspect the position of the lube oil pipe retainer - reposition if cocked.
7.
Fluid Foaming Due To Overfilling Or Incorrect Thermo Element Height: If the fluid level is too high, the moving parts will churn the fluid,
causing the oil to foam. This will cause many durability concerns including damage to the center of the gearbox. An incorrect thermo element
height will cause the fluid level to be inaccurate (either too low or too high) when the fluid is up to operating temperatures. Too low a fluid level
will cause air to be sucked into the filter, and too high a level will cause fluid foaming due to churning. Check the height with thermo element
height setting tool, J 34094- A.
8.
4th clutch hub and shaft assembly should have one needle missing from the inside of the bearing cage for oil flow to the 4th clutch fiber and
reaction plates.
9.
Cooler Flow Test - Oil cooler for the transaxle that is located in the radiator and the oil-to-air cooler (optional) that is connected in series with the
radiator transaxle oil cooler: Correct flow is two quarts of fluid per 30 seconds. Also, it must be flushed; refer to Labor Time Guide for labor
operations that must have the transaxle oil cooler flushed.
10.
Input Housing To 3rd Roller Cam Thrust Washer Replaced With A Needle Bearing:
Reference Dealer Service Bulletin No. 89-134-7A for details about interchangeability and past model service.
11.
The lube dam must be installed on most 1986 and newer models between the input and reaction carriers. Leaving a worn, damaged or missing lube
dam will allow too much lubrication fluid to leak into the bottom pan. Reference Dealer Service Bulletin No. 86-258-7A.
IMPORTANT:
When reassembling a 3rd roller clutch, ensure that the lube dam is pressed into the proper depth. If the 3rd roller clutch is mated to
the thrust needle bearing instead of the washer, then:
-
press the dam to a depth of 20.72/20.92 mm (0.816/0.824") as measured from the bottom side (sprag side) of the outside race
to the wide flat edge of the dam as shown in Figure 3.
If using the thrust washer, press the dam (on models so equipped) to a depth of 20.04/20.12 mm (0.789/0.792") as measured from
the bottom side (sprag side) of the outside race to the wide flat edge of the dam as shown in Figure 3.
