Transaxle Pinion Bearings - remove?
Thread Starter
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Mountain Pass
Joined: Aug 2010
Posts: 226
Likes: 5
From: greater Zurich area
Transaxle Pinion Bearings - remove?
Good Day
I'm about to go change all the Bearings that a 7.5inch contains since i have a veritable vienna string ensemble at the back end, playing modern 12-tone music. Have received the ordered Timken Master Bearing Kit but want my mechanic to do the job - Has the transaxle to be removed from the chassis to change the pinion Bearings?
I've changed the Oil couple of weeks ago. Oil in transaxle was looking like gold metallic paint, magnet in the housing cover and magnet in the filler-plug was full of metal dust but no larger particles found so far..
Thanks for your advise in advance!
97' XLT, 3.0L Vulcan, 95tsnd miles, Transaxle Code: S668H, 4.10 Ratio
I'm about to go change all the Bearings that a 7.5inch contains since i have a veritable vienna string ensemble at the back end, playing modern 12-tone music. Have received the ordered Timken Master Bearing Kit but want my mechanic to do the job - Has the transaxle to be removed from the chassis to change the pinion Bearings?
I've changed the Oil couple of weeks ago. Oil in transaxle was looking like gold metallic paint, magnet in the housing cover and magnet in the filler-plug was full of metal dust but no larger particles found so far..
Thanks for your advise in advance!
97' XLT, 3.0L Vulcan, 95tsnd miles, Transaxle Code: S668H, 4.10 Ratio
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
best done on lift.
C locks pulled off axle ends
pull axles out to clear carrier
pull carrier
pull pinion shaft out
i would examine closely, the wear pattern of the ring gear and pinion shaft gear for proper tooth contact wear pattern.
Free Automotive Differential Ring and Pinion Gear Installation Instructions - Drivetrain.com
http://www.therangerstation.com/tech...ms/expaxle.GIF
with shiny brass colored particles in the lube, suspect spider gear carrier thrust washer breakdown or if it's a Ford limited slip with clutches have the mech remove and check the carrier assembly.
check the outer axle bearings at the same time. Ford went cheap and used the soft axle steel as the inner race, not a better idea. only surfaced induction hardened, very thin hard surfacing. if the axle bearing surface is worn or grooved, there are aftermarket bearing that are offset from the stock race location.
replace the outer seals at the same time. may have had a water leak into the axle/diff.
if you are towing a trailer or heavy loads in back, use a synthetic lube oil in the diff. lasts much longer and handles the load of the small 7.5 better. American spec is 75w90 GL5 hypoid gear rated.
C locks pulled off axle ends
pull axles out to clear carrier
pull carrier
pull pinion shaft out
i would examine closely, the wear pattern of the ring gear and pinion shaft gear for proper tooth contact wear pattern.
Free Automotive Differential Ring and Pinion Gear Installation Instructions - Drivetrain.com
http://www.therangerstation.com/tech...ms/expaxle.GIF
with shiny brass colored particles in the lube, suspect spider gear carrier thrust washer breakdown or if it's a Ford limited slip with clutches have the mech remove and check the carrier assembly.
check the outer axle bearings at the same time. Ford went cheap and used the soft axle steel as the inner race, not a better idea. only surfaced induction hardened, very thin hard surfacing. if the axle bearing surface is worn or grooved, there are aftermarket bearing that are offset from the stock race location.
replace the outer seals at the same time. may have had a water leak into the axle/diff.
if you are towing a trailer or heavy loads in back, use a synthetic lube oil in the diff. lasts much longer and handles the load of the small 7.5 better. American spec is 75w90 GL5 hypoid gear rated.
Thread Starter
|
Mountain Pass
Joined: Aug 2010
Posts: 226
Likes: 5
From: greater Zurich area
Just want to share the results from the inspection and overhaul of the Transaxle and Differential that had a loud grinding, roaring noise:
It turned out to be the inner transaxle bearings left/right which surface of the cup has rough groves and holes. Some of the rollers are already stuck
My mechanic did also changed the Pinion bearings inner/outer from where we suspected a whine that changed its pitch with the vehicles speed.
We did not installed the outer repair Bearings because the inner race of the Axles is still in good smooth condition, the Bearings are as well. However, the mechanic was not sure if those repair Bearings will fit on my 7.5" - the visible two different outer diameters of the cylindric body gaves him some considerations (repair Bearings are somewhat unknown in Europe).. I dont't better know, but the repair Bearings from TIMKEN should fit.. we didn't try it out.
After finishing the work, it's quiet at the rear end and music is coming from the Stereo now instead from the Transaxle.
Have fun with your Aero*, still the best mid-size Van in my opinion
97' XLT, 3.0L Vulcan, 97tsnd miles, Transaxle Code: S668H, 4.10 Ratio
It turned out to be the inner transaxle bearings left/right which surface of the cup has rough groves and holes. Some of the rollers are already stuck
My mechanic did also changed the Pinion bearings inner/outer from where we suspected a whine that changed its pitch with the vehicles speed.
We did not installed the outer repair Bearings because the inner race of the Axles is still in good smooth condition, the Bearings are as well. However, the mechanic was not sure if those repair Bearings will fit on my 7.5" - the visible two different outer diameters of the cylindric body gaves him some considerations (repair Bearings are somewhat unknown in Europe).. I dont't better know, but the repair Bearings from TIMKEN should fit.. we didn't try it out.
After finishing the work, it's quiet at the rear end and music is coming from the Stereo now instead from the Transaxle.
Have fun with your Aero*, still the best mid-size Van in my opinion
97' XLT, 3.0L Vulcan, 97tsnd miles, Transaxle Code: S668H, 4.10 Ratio
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