• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

Replaced pinion seal and its leaking again.


Jm2576

New Member
Joined
Mar 26, 2022
Messages
26
Reaction score
7
Points
3
Location
Tacoma, WA
Vehicle Year
2000
Make / Model
Mazda B4000
Transmission
Automatic
I replaced my rear pinion seal a couple weeks ago and it's leaking again. I'm not sure what I did wrong. The pinion looked fine. The seal I bought looks slightly different. On my old seal the rubber stuck out a little bit, but the new one the rubber was flush with the edge. The part number for the new one I used is Master Pro #3604. Is there a link to a better one?

Also, am I supposed to use RTV or some kind of gasket sealer around the outside edge?

My truck is a 2000 Mazda B4000.

Thanks
 


Colin

Well-Known Member
Article Contributor
Joined
Jul 23, 2009
Messages
3,108
Reaction score
181
Points
63
Location
ON Canada
Vehicle Year
2004
Make / Model
Mazda
Engine Type
4.0 V6
Transmission
Automatic
2WD / 4WD
2WD
Not a B series specific problem but anyways.

Quality of the part may be an issue. If you nicked the housing removing the old seal, that could cause a leak, if it wasn't installed correctly that might be the issue. Buy a new, better seal and try again
 

Roert42

Well-Known Member
RBV's on Boost
TRS Event Participant
Joined
Apr 24, 2020
Messages
4,694
Reaction score
4,797
Points
113
Location
Kintersville, PA
Vehicle Year
2011
Make / Model
Ranger XLT
Engine Size
4.0 SOHC
Transmission
Automatic
2WD / 4WD
2WD
Only other think I can add to Colin’s post is that if there is a small groove worn in the pinion shaft from spinning on the gasket, it will not seal if the gasket lands in the same place the old one did.

Common on axel shaft seals too.
 

19Walt93

Well-Known Member
Ford Technician
V8 Engine Swap
Joined
Nov 13, 2018
Messages
4,431
Reaction score
4,327
Points
113
Location
Canaan,NH
Vehicle Year
1993
Make / Model
Ford Ranger
Engine Type
V8
Engine Size
351
Transmission
Automatic
2WD / 4WD
2WD
Total Drop
3"
Tire Size
235/55R16
My credo
If you don't have time to do it right will you have time to do it over?
/\ Like he said, if the pinion yoke is scored it will leak. You could install a Speedi sleeve and repair a scored yoke, a Speedi sleeve is a paper thin steel band that you carefully drive onto the yoke to create a new seal surface. It's also important to make sure the new seal is driven in absolutely square but it may not be an installation error at all. The seal was new- "new means new, it doesn't necessarily mean good". That's almost a direct quote from the vibration diagnosis manual Ford released for the early Fairmonts.
 

ericbphoto

Overlander in development
TRS Event Staff
TRS Forum Moderator
Supporting Member
U.S. Military - Veteran
TRS 20th Anniversary
VAGABOND
TRS Event Participant
GMRS Radio License
Joined
Feb 7, 2016
Messages
14,986
Reaction score
15,972
Points
113
Age
59
Location
Wellford, SC
Vehicle Year
1993
Make / Model
Ford Ranger
Engine Type
3.0 V6
Engine Size
3.0L
Transmission
Manual
2WD / 4WD
4WD
Total Lift
6"
Tire Size
35"
My credo
In theory, theory and practice are the same. In practice, they are different.
Make sure there is no play in the pinion shaft. If the bearings are loose or going bad, that would allow play - side to side or up and down movement of the pinion and that would prematurely destroy pinion seals.
 

Jm2576

New Member
Joined
Mar 26, 2022
Messages
26
Reaction score
7
Points
3
Location
Tacoma, WA
Vehicle Year
2000
Make / Model
Mazda B4000
Transmission
Automatic
Thanks for the replies. My pinion shaft has a small amount of scoring, but when I drag my fingernail across it it doesn't catch, so it seems to be in pretty good condition. I think I just got a cheap part, but it was the only one my auto parts store had at the time. I would like to get a better one when I replace it again. Does anyone know a website where I could get a high quality OEM part?
Thanks
 

sgtsandman

Aircraft Fuel Tank Diver
TRS Forum Moderator
U.S. Military - Active
TRS 20th Anniversary
TRS Event Participant
Ham Radio Operator
GMRS Radio License
Joined
Mar 11, 2017
Messages
12,412
Reaction score
11,975
Points
113
Location
Aliquippa, PA
Vehicle Year
2011/2019
Make / Model
Ranger XLT/FX4
Engine Size
4.0 SOHC/2.3 Ecoboost
2WD / 4WD
4WD
Total Lift
Pre-2008 lift/Stock
Tire Size
31X10.5R15/265/65R17
Thanks for the replies. My pinion shaft has a small amount of scoring, but when I drag my fingernail across it it doesn't catch, so it seems to be in pretty good condition. I think I just got a cheap part, but it was the only one my auto parts store had at the time. I would like to get a better one when I replace it again. Does anyone know a website where I could get a high quality OEM part?
Thanks
Tasca tends to be the cheapest and they sell nothing but OEM.
 

Roert42

Well-Known Member
RBV's on Boost
TRS Event Participant
Joined
Apr 24, 2020
Messages
4,694
Reaction score
4,797
Points
113
Location
Kintersville, PA
Vehicle Year
2011
Make / Model
Ranger XLT
Engine Size
4.0 SOHC
Transmission
Automatic
2WD / 4WD
2WD
If it’s for an 8.8, super common rear, should be able to find a high quality replacement almost anywhere online. Napaonline, Rockauto, summit, jegs.
 

Sponsored Ad


Sponsored Ad

Staff online

Members online

Today's birthdays

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Latest posts

Truck of The Month


Yotaismygame
February Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Follow TRS On Instagram

TRS Events

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top